/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.grid.GridPanel
 * @extends Ext.Panel
 * <p>This class represents the primary interface of a component based grid control to represent data
 * in a tabular format of rows and columns. The GridPanel is composed of the following:</p>
 * <div class="mdetail-params"><ul>
 * <li><b>{@link Ext.data.Store Store}</b> : The Model holding the data records (rows)
 * <div class="sub-desc"></div></li>
 * <li><b>{@link Ext.grid.ColumnModel Column model}</b> : Column makeup
 * <div class="sub-desc"></div></li>
 * <li><b>{@link Ext.grid.GridView View}</b> : Encapsulates the user interface
 * <div class="sub-desc"></div></li>
 * <li><b>{@link Ext.grid.AbstractSelectionModel selection model}</b> : Selection behavior
 * <div class="sub-desc"></div></li>
 * </ul></div>
 * <p>Example usage:</p>
 * <pre><code>
var grid = new Ext.grid.GridPanel({
    {@link #store}: new {@link Ext.data.Store}({
        {@link Ext.data.Store#autoDestroy autoDestroy}: true,
        {@link Ext.data.Store#reader reader}: reader,
        {@link Ext.data.Store#data data}: xg.dummyData
    }),
    {@link #colModel}: new {@link Ext.grid.ColumnModel}({
        {@link Ext.grid.ColumnModel#defaults defaults}: {
            width: 120,
            sortable: true
        },
        {@link Ext.grid.ColumnModel#columns columns}: [
            {id: 'company', header: 'Company', width: 200, sortable: true, dataIndex: 'company'},
            {header: 'Price', renderer: Ext.util.Format.usMoney, dataIndex: 'price'},
            {header: 'Change', dataIndex: 'change'},
            {header: '% Change', dataIndex: 'pctChange'},
            // instead of specifying renderer: Ext.util.Format.dateRenderer('m/d/Y') use xtype
            {
                header: 'Last Updated', width: 135, dataIndex: 'lastChange',
                xtype: 'datecolumn', format: 'M d, Y'
            }
        ]
    }),
    {@link #viewConfig}: {
        {@link Ext.grid.GridView#forceFit forceFit}: true,

//      Return CSS class to apply to rows depending upon data values
        {@link Ext.grid.GridView#getRowClass getRowClass}: function(record, index) {
            var c = record.{@link Ext.data.Record#get get}('change');
            if (c < 0) {
                return 'price-fall';
            } else if (c > 0) {
                return 'price-rise';
            }
        }
    },
    {@link #sm}: new Ext.grid.RowSelectionModel({singleSelect:true}),
    width: 600,
    height: 300,
    frame: true,
    title: 'Framed with Row Selection and Horizontal Scrolling',
    iconCls: 'icon-grid'
});
 * </code></pre>
 * <p><b><u>Notes:</u></b></p>
 * <div class="mdetail-params"><ul>
 * <li>Although this class inherits many configuration options from base classes, some of them
 * (such as autoScroll, autoWidth, layout, items, etc) are not used by this class, and will
 * have no effect.</li>
 * <li>A grid <b>requires</b> a width in which to scroll its columns, and a height in which to
 * scroll its rows. These dimensions can either be set explicitly through the
 * <tt>{@link Ext.BoxComponent#height height}</tt> and <tt>{@link Ext.BoxComponent#width width}</tt>
 * configuration options or implicitly set by using the grid as a child item of a
 * {@link Ext.Container Container} which will have a {@link Ext.Container#layout layout manager}
 * provide the sizing of its child items (for example the Container of the Grid may specify
 * <tt>{@link Ext.Container#layout layout}:'fit'</tt>).</li>
 * <li>To access the data in a Grid, it is necessary to use the data model encapsulated
 * by the {@link #store Store}. See the {@link #cellclick} event for more details.</li>
 * </ul></div>
 * @constructor
 * @param {Object} config The config object
 * @xtype grid
 */
Ext.grid.GridPanel = Ext.extend(Ext.Panel, {
    /**
     * @cfg {String} autoExpandColumn
     * <p>The <tt>{@link Ext.grid.Column#id id}</tt> of a {@link Ext.grid.Column column} in
     * this grid that should expand to fill unused space. This value specified here can not
     * be <tt>0</tt>.</p>
     * <br><p><b>Note</b>: If the Grid's {@link Ext.grid.GridView view} is configured with
     * <tt>{@link Ext.grid.GridView#forceFit forceFit}=true</tt> the <tt>autoExpandColumn</tt>
     * is ignored. See {@link Ext.grid.Column}.<tt>{@link Ext.grid.Column#width width}</tt>
     * for additional details.</p>
     * <p>See <tt>{@link #autoExpandMax}</tt> and <tt>{@link #autoExpandMin}</tt> also.</p>
     */
    autoExpandColumn : false,
    
    /**
     * @cfg {Number} autoExpandMax The maximum width the <tt>{@link #autoExpandColumn}</tt>
     * can have (if enabled). Defaults to <tt>1000</tt>.
     */
    autoExpandMax : 1000,
    
    /**
     * @cfg {Number} autoExpandMin The minimum width the <tt>{@link #autoExpandColumn}</tt>
     * can have (if enabled). Defaults to <tt>50</tt>.
     */
    autoExpandMin : 50,
    
    /**
     * @cfg {Boolean} columnLines <tt>true</tt> to add css for column separation lines.
     * Default is <tt>false</tt>.
     */
    columnLines : false,
    
    /**
     * @cfg {Object} cm Shorthand for <tt>{@link #colModel}</tt>.
     */
    /**
     * @cfg {Object} colModel The {@link Ext.grid.ColumnModel} to use when rendering the grid (required).
     */
    /**
     * @cfg {Array} columns An array of {@link Ext.grid.Column columns} to auto create a
     * {@link Ext.grid.ColumnModel}.  The ColumnModel may be explicitly created via the
     * <tt>{@link #colModel}</tt> configuration property.
     */
    /**
     * @cfg {String} ddGroup The DD group this GridPanel belongs to. Defaults to <tt>'GridDD'</tt> if not specified.
     */
    /**
     * @cfg {String} ddText
     * Configures the text in the drag proxy.  Defaults to:
     * <pre><code>
     * ddText : '{0} selected row{1}'
     * </code></pre>
     * <tt>{0}</tt> is replaced with the number of selected rows.
     */
    ddText : '{0} selected row{1}',

    /**
     * @cfg {Boolean} dragCell Defaults to <code>false</code>. If using {@link #enableDragDrop} with a CellSelectionModel,
     * set this to true to have the {@link #getView view}'s {@link Ext.grid.GridView#dragZone dragZone}'s <code>getDragData</code>
     * method reference the selected <b>cell</b> using <code>[rowIndex, cellIndex]</code>
     */

    /**
     * @cfg {Boolean} deferRowRender <P>Defaults to <tt>true</tt> to enable deferred row rendering.</p>
     * <p>This allows the GridPanel to be initially rendered empty, with the expensive update of the row
     * structure deferred so that layouts with GridPanels appear more quickly.</p>
     */
    deferRowRender : true,
    
    /**
     * @cfg {Boolean} disableSelection <p><tt>true</tt> to disable selections in the grid. Defaults to <tt>false</tt>.</p>
     * <p>Ignored if a {@link #selModel SelectionModel} is specified.</p>
     */
    /**
     * @cfg {Boolean} enableColumnResize <tt>false</tt> to turn off column resizing for the whole grid. Defaults to <tt>true</tt>.
     */
    /**
     * @cfg {Boolean} enableColumnHide
     * Defaults to <tt>true</tt> to enable {@link Ext.grid.Column#hidden hiding of columns}
     * with the {@link #enableHdMenu header menu}.
     */
    enableColumnHide : true,
    
    /**
     * @cfg {Boolean} enableColumnMove Defaults to <tt>true</tt> to enable drag and drop reorder of columns. <tt>false</tt>
     * to turn off column reordering via drag drop.
     */
    enableColumnMove : true,
    
    /**
     * @cfg {Boolean} enableDragDrop <p>Enables dragging of the selected rows of the GridPanel. Defaults to <tt>false</tt>.</p>
     * <p>Setting this to <b><tt>true</tt></b> causes this GridPanel's {@link #getView GridView} to
     * create an instance of {@link Ext.grid.GridDragZone}. <b>Note</b>: this is available only <b>after</b>
     * the Grid has been rendered as the GridView's <tt>{@link Ext.grid.GridView#dragZone dragZone}</tt>
     * property.</p>
     * <p>A cooperating {@link Ext.dd.DropZone DropZone} must be created who's implementations of
     * {@link Ext.dd.DropZone#onNodeEnter onNodeEnter}, {@link Ext.dd.DropZone#onNodeOver onNodeOver},
     * {@link Ext.dd.DropZone#onNodeOut onNodeOut} and {@link Ext.dd.DropZone#onNodeDrop onNodeDrop} are able
     * to process the {@link Ext.grid.GridDragZone#getDragData data} which is provided.</p>
     */
    enableDragDrop : false,
    
    /**
     * @cfg {Boolean} enableHdMenu Defaults to <tt>true</tt> to enable the drop down button for menu in the headers.
     */
    enableHdMenu : true,
    
    /**
     * @cfg {Boolean} hideHeaders True to hide the grid's header. Defaults to <code>false</code>.
     */
    /**
     * @cfg {Object} loadMask An {@link Ext.LoadMask} config or true to mask the grid while
     * loading. Defaults to <code>false</code>.
     */
    loadMask : false,
    
    /**
     * @cfg {Number} maxHeight Sets the maximum height of the grid - ignored if <tt>autoHeight</tt> is not on.
     */
    /**
     * @cfg {Number} minColumnWidth The minimum width a column can be resized to. Defaults to <tt>25</tt>.
     */
    minColumnWidth : 25,
    
    /**
     * @cfg {Object} sm Shorthand for <tt>{@link #selModel}</tt>.
     */
    /**
     * @cfg {Object} selModel Any subclass of {@link Ext.grid.AbstractSelectionModel} that will provide
     * the selection model for the grid (defaults to {@link Ext.grid.RowSelectionModel} if not specified).
     */
    /**
     * @cfg {Ext.data.Store} store The {@link Ext.data.Store} the grid should use as its data source (required).
     */
    /**
     * @cfg {Boolean} stripeRows <tt>true</tt> to stripe the rows. Default is <tt>false</tt>.
     * <p>This causes the CSS class <tt><b>x-grid3-row-alt</b></tt> to be added to alternate rows of
     * the grid. A default CSS rule is provided which sets a background colour, but you can override this
     * with a rule which either overrides the <b>background-color</b> style using the '!important'
     * modifier, or which uses a CSS selector of higher specificity.</p>
     */
    stripeRows : false,
    
    /**
     * @cfg {Boolean} trackMouseOver True to highlight rows when the mouse is over. Default is <tt>true</tt>
     * for GridPanel, but <tt>false</tt> for EditorGridPanel.
     */
    trackMouseOver : true,
    
    /**
     * @cfg {Array} stateEvents
     * An array of events that, when fired, should trigger this component to save its state.
     * Defaults to:<pre><code>
     * stateEvents: ['columnmove', 'columnresize', 'sortchange', 'groupchange']
     * </code></pre>
     * <p>These can be any types of events supported by this component, including browser or
     * custom events (e.g., <tt>['click', 'customerchange']</tt>).</p>
     * <p>See {@link Ext.Component#stateful} for an explanation of saving and restoring
     * Component state.</p>
     */
    stateEvents : ['columnmove', 'columnresize', 'sortchange', 'groupchange'],
    
    /**
     * @cfg {Object} view The {@link Ext.grid.GridView} used by the grid. This can be set
     * before a call to {@link Ext.Component#render render()}.
     */
    view : null,

    /**
     * @cfg {Array} bubbleEvents
     * <p>An array of events that, when fired, should be bubbled to any parent container.
     * See {@link Ext.util.Observable#enableBubble}.
     * Defaults to <tt>[]</tt>.
     */
    bubbleEvents: [],

    /**
     * @cfg {Object} viewConfig A config object that will be applied to the grid's UI view.  Any of
     * the config options available for {@link Ext.grid.GridView} can be specified here. This option
     * is ignored if <tt>{@link #view}</tt> is specified.
     */

    // private
    rendered : false,
    
    // private
    viewReady : false,

    // private
    initComponent : function() {
        Ext.grid.GridPanel.superclass.initComponent.call(this);

        if (this.columnLines) {
            this.cls = (this.cls || '') + ' x-grid-with-col-lines';
        }
        // override any provided value since it isn't valid
        // and is causing too many bug reports ;)
        this.autoScroll = false;
        this.autoWidth = false;

        if(Ext.isArray(this.columns)){
            this.colModel = new Ext.grid.ColumnModel(this.columns);
            delete this.columns;
        }

        // check and correct shorthanded configs
        if(this.ds){
            this.store = this.ds;
            delete this.ds;
        }
        if(this.cm){
            this.colModel = this.cm;
            delete this.cm;
        }
        if(this.sm){
            this.selModel = this.sm;
            delete this.sm;
        }
        this.store = Ext.StoreMgr.lookup(this.store);

        this.addEvents(
            // raw events
            /**
             * @event click
             * The raw click event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'click',
            /**
             * @event dblclick
             * The raw dblclick event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'dblclick',
            /**
             * @event contextmenu
             * The raw contextmenu event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'contextmenu',
            /**
             * @event mousedown
             * The raw mousedown event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'mousedown',
            /**
             * @event mouseup
             * The raw mouseup event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'mouseup',
            /**
             * @event mouseover
             * The raw mouseover event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'mouseover',
            /**
             * @event mouseout
             * The raw mouseout event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'mouseout',
            /**
             * @event keypress
             * The raw keypress event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'keypress',
            /**
             * @event keydown
             * The raw keydown event for the entire grid.
             * @param {Ext.EventObject} e
             */
            'keydown',

            // custom events
            /**
             * @event cellmousedown
             * Fires before a cell is clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'cellmousedown',
            /**
             * @event rowmousedown
             * Fires before a row is clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowmousedown',
            /**
             * @event headermousedown
             * Fires before a header is clicked
             * @param {Grid} this
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'headermousedown',

            /**
             * @event groupmousedown
             * Fires before a group header is clicked. <b>Only applies for grids with a {@link Ext.grid.GroupingView GroupingView}</b>.
             * @param {Grid} this
             * @param {String} groupField
             * @param {String} groupValue
             * @param {Ext.EventObject} e
             */
            'groupmousedown',

            /**
             * @event rowbodymousedown
             * Fires before the row body is clicked. <b>Only applies for grids with {@link Ext.grid.GridView#enableRowBody enableRowBody} configured.</b>
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowbodymousedown',

            /**
             * @event containermousedown
             * Fires before the container is clicked. The container consists of any part of the grid body that is not covered by a row.
             * @param {Grid} this
             * @param {Ext.EventObject} e
             */
            'containermousedown',

            /**
             * @event cellclick
             * Fires when a cell is clicked.
             * The data for the cell is drawn from the {@link Ext.data.Record Record}
             * for this row. To access the data in the listener function use the
             * following technique:
             * <pre><code>
function(grid, rowIndex, columnIndex, e) {
    var record = grid.getStore().getAt(rowIndex);  // Get the Record
    var fieldName = grid.getColumnModel().getDataIndex(columnIndex); // Get field name
    var data = record.get(fieldName);
}
</code></pre>
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'cellclick',
            /**
             * @event celldblclick
             * Fires when a cell is double clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'celldblclick',
            /**
             * @event rowclick
             * Fires when a row is clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowclick',
            /**
             * @event rowdblclick
             * Fires when a row is double clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowdblclick',
            /**
             * @event headerclick
             * Fires when a header is clicked
             * @param {Grid} this
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'headerclick',
            /**
             * @event headerdblclick
             * Fires when a header cell is double clicked
             * @param {Grid} this
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'headerdblclick',
            /**
             * @event groupclick
             * Fires when group header is clicked. <b>Only applies for grids with a {@link Ext.grid.GroupingView GroupingView}</b>.
             * @param {Grid} this
             * @param {String} groupField
             * @param {String} groupValue
             * @param {Ext.EventObject} e
             */
            'groupclick',
            /**
             * @event groupdblclick
             * Fires when group header is double clicked. <b>Only applies for grids with a {@link Ext.grid.GroupingView GroupingView}</b>.
             * @param {Grid} this
             * @param {String} groupField
             * @param {String} groupValue
             * @param {Ext.EventObject} e
             */
            'groupdblclick',
            /**
             * @event containerclick
             * Fires when the container is clicked. The container consists of any part of the grid body that is not covered by a row.
             * @param {Grid} this
             * @param {Ext.EventObject} e
             */
            'containerclick',
            /**
             * @event containerdblclick
             * Fires when the container is double clicked. The container consists of any part of the grid body that is not covered by a row.
             * @param {Grid} this
             * @param {Ext.EventObject} e
             */
            'containerdblclick',

            /**
             * @event rowbodyclick
             * Fires when the row body is clicked. <b>Only applies for grids with {@link Ext.grid.GridView#enableRowBody enableRowBody} configured.</b>
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowbodyclick',
            /**
             * @event rowbodydblclick
             * Fires when the row body is double clicked. <b>Only applies for grids with {@link Ext.grid.GridView#enableRowBody enableRowBody} configured.</b>
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowbodydblclick',

            /**
             * @event rowcontextmenu
             * Fires when a row is right clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowcontextmenu',
            /**
             * @event cellcontextmenu
             * Fires when a cell is right clicked
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Number} cellIndex
             * @param {Ext.EventObject} e
             */
            'cellcontextmenu',
            /**
             * @event headercontextmenu
             * Fires when a header is right clicked
             * @param {Grid} this
             * @param {Number} columnIndex
             * @param {Ext.EventObject} e
             */
            'headercontextmenu',
            /**
             * @event groupcontextmenu
             * Fires when group header is right clicked. <b>Only applies for grids with a {@link Ext.grid.GroupingView GroupingView}</b>.
             * @param {Grid} this
             * @param {String} groupField
             * @param {String} groupValue
             * @param {Ext.EventObject} e
             */
            'groupcontextmenu',
            /**
             * @event containercontextmenu
             * Fires when the container is right clicked. The container consists of any part of the grid body that is not covered by a row.
             * @param {Grid} this
             * @param {Ext.EventObject} e
             */
            'containercontextmenu',
            /**
             * @event rowbodycontextmenu
             * Fires when the row body is right clicked. <b>Only applies for grids with {@link Ext.grid.GridView#enableRowBody enableRowBody} configured.</b>
             * @param {Grid} this
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'rowbodycontextmenu',
            /**
             * @event bodyscroll
             * Fires when the body element is scrolled
             * @param {Number} scrollLeft
             * @param {Number} scrollTop
             */
            'bodyscroll',
            /**
             * @event columnresize
             * Fires when the user resizes a column
             * @param {Number} columnIndex
             * @param {Number} newSize
             */
            'columnresize',
            /**
             * @event columnmove
             * Fires when the user moves a column
             * @param {Number} oldIndex
             * @param {Number} newIndex
             */
            'columnmove',
            /**
             * @event sortchange
             * Fires when the grid's store sort changes
             * @param {Grid} this
             * @param {Object} sortInfo An object with the keys field and direction
             */
            'sortchange',
            /**
             * @event groupchange
             * Fires when the grid's grouping changes (only applies for grids with a {@link Ext.grid.GroupingView GroupingView})
             * @param {Grid} this
             * @param {String} groupField A string with the grouping field, null if the store is not grouped.
             */
            'groupchange',
            /**
             * @event reconfigure
             * Fires when the grid is reconfigured with a new store and/or column model.
             * @param {Grid} this
             * @param {Ext.data.Store} store The new store
             * @param {Ext.grid.ColumnModel} colModel The new column model
             */
            'reconfigure',
            /**
             * @event viewready
             * Fires when the grid view is available (use this for selecting a default row).
             * @param {Grid} this
             */
            'viewready'
        );
    },

    // private
    onRender : function(ct, position){
        Ext.grid.GridPanel.superclass.onRender.apply(this, arguments);

        var c = this.getGridEl();

        this.el.addClass('x-grid-panel');

        this.mon(c, {
            scope: this,
            mousedown: this.onMouseDown,
            click: this.onClick,
            dblclick: this.onDblClick,
            contextmenu: this.onContextMenu
        });

        this.relayEvents(c, ['mousedown','mouseup','mouseover','mouseout','keypress', 'keydown']);

        var view = this.getView();
        view.init(this);
        view.render();
        this.getSelectionModel().init(this);
    },

    // private
    initEvents : function(){
        Ext.grid.GridPanel.superclass.initEvents.call(this);

        if(this.loadMask){
            this.loadMask = new Ext.LoadMask(this.bwrap,
                    Ext.apply({store:this.store}, this.loadMask));
        }
    },

    initStateEvents : function(){
        Ext.grid.GridPanel.superclass.initStateEvents.call(this);
        this.mon(this.colModel, 'hiddenchange', this.saveState, this, {delay: 100});
    },

    applyState : function(state){
        var cm = this.colModel,
            cs = state.columns,
            store = this.store,
            s,
            c,
            colIndex;

        if(cs){
            for(var i = 0, len = cs.length; i < len; i++){
                s = cs[i];
                c = cm.getColumnById(s.id);
                if(c){
                    colIndex = cm.getIndexById(s.id);
                    cm.setState(colIndex, {
                        hidden: s.hidden,
                        width: s.width,
                        sortable: c.sortable,
                        editable: c.editable
                    });
                    if(colIndex != i){
                        cm.moveColumn(colIndex, i);
                    }
                }
            }
        }
        if(store){
            s = state.sort;
            if(s){
                store[store.remoteSort ? 'setDefaultSort' : 'sort'](s.field, s.direction);
            }
            s = state.group;
            if(store.groupBy){
                if(s){
                    store.groupBy(s);
                }else{
                    store.clearGrouping();
                }
            }

        }
        var o = Ext.apply({}, state);
        delete o.columns;
        delete o.sort;
        Ext.grid.GridPanel.superclass.applyState.call(this, o);
    },

    getState : function(){
        var o = {columns: []},
            store = this.store,
            ss,
            gs;

        for(var i = 0, c; (c = this.colModel.config[i]); i++){
            o.columns[i] = {
                id: c.id,
                width: c.width
            };
            if(c.hidden){
                o.columns[i].hidden = true;
            }
        }
        if(store){
            ss = store.getSortState();
            if(ss){
                o.sort = ss;
            }
            if(store.getGroupState){
                gs = store.getGroupState();
                if(gs){
                    o.group = gs;
                }
            }
        }
        return o;
    },

    // private
    afterRender : function(){
        Ext.grid.GridPanel.superclass.afterRender.call(this);
        var v = this.view;
        this.on('bodyresize', v.layout, v);
        v.layout(true);
        if(this.deferRowRender){
            if (!this.deferRowRenderTask){
                this.deferRowRenderTask = new Ext.util.DelayedTask(v.afterRender, this.view);
            }
            this.deferRowRenderTask.delay(10);
        }else{
            v.afterRender();
        }
        this.viewReady = true;
    },

    /**
     * <p>Reconfigures the grid to use a different Store and Column Model
     * and fires the 'reconfigure' event. The View will be bound to the new
     * objects and refreshed.</p>
     * <p>Be aware that upon reconfiguring a GridPanel, certain existing settings <i>may</i> become
     * invalidated. For example the configured {@link #autoExpandColumn} may no longer exist in the
     * new ColumnModel. Also, an existing {@link Ext.PagingToolbar PagingToolbar} will still be bound
     * to the old Store, and will need rebinding. Any {@link #plugins} might also need reconfiguring
     * with the new data.</p>
     * @param {Ext.data.Store} store The new {@link Ext.data.Store} object
     * @param {Ext.grid.ColumnModel} colModel The new {@link Ext.grid.ColumnModel} object
     */
    reconfigure : function(store, colModel){
        var rendered = this.rendered;
        if(rendered){
            if(this.loadMask){
                this.loadMask.destroy();
                this.loadMask = new Ext.LoadMask(this.bwrap,
                        Ext.apply({}, {store:store}, this.initialConfig.loadMask));
            }
        }
        if(this.view){
            this.view.initData(store, colModel);
        }
        this.store = store;
        this.colModel = colModel;
        if(rendered){
            this.view.refresh(true);
        }
        this.fireEvent('reconfigure', this, store, colModel);
    },

    // private
    onDestroy : function(){
        if (this.deferRowRenderTask && this.deferRowRenderTask.cancel){
            this.deferRowRenderTask.cancel();
        }
        if(this.rendered){
            Ext.destroy(this.view, this.loadMask);
        }else if(this.store && this.store.autoDestroy){
            this.store.destroy();
        }
        Ext.destroy(this.colModel, this.selModel);
        this.store = this.selModel = this.colModel = this.view = this.loadMask = null;
        Ext.grid.GridPanel.superclass.onDestroy.call(this);
    },

    // private
    processEvent : function(name, e){
        this.view.processEvent(name, e);
    },

    // private
    onClick : function(e){
        this.processEvent('click', e);
    },

    // private
    onMouseDown : function(e){
        this.processEvent('mousedown', e);
    },

    // private
    onContextMenu : function(e, t){
        this.processEvent('contextmenu', e);
    },

    // private
    onDblClick : function(e){
        this.processEvent('dblclick', e);
    },

    // private
    walkCells : function(row, col, step, fn, scope){
        var cm    = this.colModel,
            clen  = cm.getColumnCount(),
            ds    = this.store,
            rlen  = ds.getCount(),
            first = true;

        if(step < 0){
            if(col < 0){
                row--;
                first = false;
            }
            while(row >= 0){
                if(!first){
                    col = clen-1;
                }
                first = false;
                while(col >= 0){
                    if(fn.call(scope || this, row, col, cm) === true){
                        return [row, col];
                    }
                    col--;
                }
                row--;
            }
        } else {
            if(col >= clen){
                row++;
                first = false;
            }
            while(row < rlen){
                if(!first){
                    col = 0;
                }
                first = false;
                while(col < clen){
                    if(fn.call(scope || this, row, col, cm) === true){
                        return [row, col];
                    }
                    col++;
                }
                row++;
            }
        }
        return null;
    },

    /**
     * Returns the grid's underlying element.
     * @return {Element} The element
     */
    getGridEl : function(){
        return this.body;
    },

    // private for compatibility, overridden by editor grid
    stopEditing : Ext.emptyFn,

    /**
     * Returns the grid's selection model configured by the <code>{@link #selModel}</code>
     * configuration option. If no selection model was configured, this will create
     * and return a {@link Ext.grid.RowSelectionModel RowSelectionModel}.
     * @return {SelectionModel}
     */
    getSelectionModel : function(){
        if(!this.selModel){
            this.selModel = new Ext.grid.RowSelectionModel(
                    this.disableSelection ? {selectRow: Ext.emptyFn} : null);
        }
        return this.selModel;
    },

    /**
     * Returns the grid's data store.
     * @return {Ext.data.Store} The store
     */
    getStore : function(){
        return this.store;
    },

    /**
     * Returns the grid's ColumnModel.
     * @return {Ext.grid.ColumnModel} The column model
     */
    getColumnModel : function(){
        return this.colModel;
    },

    /**
     * Returns the grid's GridView object.
     * @return {Ext.grid.GridView} The grid view
     */
    getView : function() {
        if (!this.view) {
            this.view = new Ext.grid.GridView(this.viewConfig);
        }
        
        return this.view;
    },
    /**
     * Called to get grid's drag proxy text, by default returns this.ddText.
     * @return {String} The text
     */
    getDragDropText : function(){
        var count = this.selModel.getCount ? this.selModel.getCount() : 1;
        return String.format(this.ddText, count, count == 1 ? '' : 's');
    }

    /**
     * @cfg {String/Number} activeItem
     * @hide
     */
    /**
     * @cfg {Boolean} autoDestroy
     * @hide
     */
    /**
     * @cfg {Object/String/Function} autoLoad
     * @hide
     */
    /**
     * @cfg {Boolean} autoWidth
     * @hide
     */
    /**
     * @cfg {Boolean/Number} bufferResize
     * @hide
     */
    /**
     * @cfg {String} defaultType
     * @hide
     */
    /**
     * @cfg {Object} defaults
     * @hide
     */
    /**
     * @cfg {Boolean} hideBorders
     * @hide
     */
    /**
     * @cfg {Mixed} items
     * @hide
     */
    /**
     * @cfg {String} layout
     * @hide
     */
    /**
     * @cfg {Object} layoutConfig
     * @hide
     */
    /**
     * @cfg {Boolean} monitorResize
     * @hide
     */
    /**
     * @property items
     * @hide
     */
    /**
     * @method add
     * @hide
     */
    /**
     * @method cascade
     * @hide
     */
    /**
     * @method doLayout
     * @hide
     */
    /**
     * @method find
     * @hide
     */
    /**
     * @method findBy
     * @hide
     */
    /**
     * @method findById
     * @hide
     */
    /**
     * @method findByType
     * @hide
     */
    /**
     * @method getComponent
     * @hide
     */
    /**
     * @method getLayout
     * @hide
     */
    /**
     * @method getUpdater
     * @hide
     */
    /**
     * @method insert
     * @hide
     */
    /**
     * @method load
     * @hide
     */
    /**
     * @method remove
     * @hide
     */
    /**
     * @event add
     * @hide
     */
    /**
     * @event afterlayout
     * @hide
     */
    /**
     * @event beforeadd
     * @hide
     */
    /**
     * @event beforeremove
     * @hide
     */
    /**
     * @event remove
     * @hide
     */



    /**
     * @cfg {String} allowDomMove  @hide
     */
    /**
     * @cfg {String} autoEl @hide
     */
    /**
     * @cfg {String} applyTo  @hide
     */
    /**
     * @cfg {String} autoScroll  @hide
     */
    /**
     * @cfg {String} bodyBorder  @hide
     */
    /**
     * @cfg {String} bodyStyle  @hide
     */
    /**
     * @cfg {String} contentEl  @hide
     */
    /**
     * @cfg {String} disabledClass  @hide
     */
    /**
     * @cfg {String} elements  @hide
     */
    /**
     * @cfg {String} html  @hide
     */
    /**
     * @cfg {Boolean} preventBodyReset
     * @hide
     */
    /**
     * @property disabled
     * @hide
     */
    /**
     * @method applyToMarkup
     * @hide
     */
    /**
     * @method enable
     * @hide
     */
    /**
     * @method disable
     * @hide
     */
    /**
     * @method setDisabled
     * @hide
     */
});
Ext.reg('grid', Ext.grid.GridPanel);/**
 * @class Ext.grid.PivotGrid
 * @extends Ext.grid.GridPanel
 * <p>The PivotGrid component enables rapid summarization of large data sets. It provides a way to reduce a large set of
 * data down into a format where trends and insights become more apparent. A classic example is in sales data; a company
 * will often have a record of all sales it makes for a given period - this will often encompass thousands of rows of
 * data. The PivotGrid allows you to see how well each salesperson performed, which cities generate the most revenue, 
 * how products perform between cities and so on.</p>
 * <p>A PivotGrid is composed of two axes (left and top), one {@link #measure} and one {@link #aggregator aggregation}
 * function. Each axis can contain one or more {@link #dimension}, which are ordered into a hierarchy. Dimensions on the 
 * left axis can also specify a width. Each dimension in each axis can specify its sort ordering, defaulting to "ASC", 
 * and must specify one of the fields in the {@link Ext.data.Record Record} used by the PivotGrid's 
 * {@link Ext.data.Store Store}.</p>
<pre><code>
// This is the record representing a single sale
var SaleRecord = Ext.data.Record.create([
    {name: 'person',   type: 'string'},
    {name: 'product',  type: 'string'},
    {name: 'city',     type: 'string'},
    {name: 'state',    type: 'string'},
    {name: 'year',     type: 'int'},
    {name: 'value',    type: 'int'}
]);

// A simple store that loads SaleRecord data from a url
var myStore = new Ext.data.Store({
    url: 'data.json',
    autoLoad: true,
    reader: new Ext.data.JsonReader({
        root: 'rows',
        idProperty: 'id'
    }, SaleRecord)
});

// Create the PivotGrid itself, referencing the store
var pivot = new Ext.grid.PivotGrid({
    store     : myStore,
    aggregator: 'sum',
    measure   : 'value',

    leftAxis: [
        {
            width: 60,
            dataIndex: 'product'
        },
        {
            width: 120,
            dataIndex: 'person',
            direction: 'DESC'
        }
    ],

    topAxis: [
        {
            dataIndex: 'year'
        }
    ]
});
</code></pre>
 * <p>The specified {@link #measure} is the field from SaleRecord that is extracted from each combination
 * of product and person (on the left axis) and year on the top axis. There may be several SaleRecords in the 
 * data set that share this combination, so an array of measure fields is produced. This array is then 
 * aggregated using the {@link #aggregator} function.</p>
 * <p>The default aggregator function is sum, which simply adds up all of the extracted measure values. Other
 * built-in aggregator functions are count, avg, min and max. In addition, you can specify your own function.
 * In this example we show the code used to sum the measures, but you can return any value you like. See
 * {@link #aggregator} for more details.</p>
<pre><code>
new Ext.grid.PivotGrid({
    aggregator: function(records, measure) {
        var length = records.length,
            total  = 0,
            i;

        for (i = 0; i < length; i++) {
            total += records[i].get(measure);
        }

        return total;
    },
    
    renderer: function(value) {
        return Math.round(value);
    },
    
    //your normal config here
});
</code></pre>
 * <p><u>Renderers</u></p>
 * <p>PivotGrid optionally accepts a {@link #renderer} function which can modify the data in each cell before it
 * is rendered. The renderer is passed the value that would usually be placed in the cell and is expected to return
 * the new value. For example let's imagine we had height data expressed as a decimal - here's how we might use a
 * renderer to display the data in feet and inches notation:</p>
<pre><code>
new Ext.grid.PivotGrid({
    //in each case the value is a decimal number of feet
    renderer  : function(value) {
        var feet   = Math.floor(value),
            inches = Math.round((value - feet) * 12);

        return String.format("{0}' {1}\"", feet, inches);
    },
    //normal config here
});
</code></pre>
 * <p><u>Reconfiguring</u></p>
 * <p>All aspects PivotGrid's configuration can be updated at runtime. It is easy to change the {@link #setMeasure measure}, 
 * {@link #setAggregator aggregation function}, {@link #setLeftAxis left} and {@link #setTopAxis top} axes and refresh the grid.</p>
 * <p>In this case we reconfigure the PivotGrid to have city and year as the top axis dimensions, rendering the average sale
 * value into the cells:</p>
<pre><code>
//the left axis can also be changed
pivot.topAxis.setDimensions([
    {dataIndex: 'city', direction: 'DESC'},
    {dataIndex: 'year', direction: 'ASC'}
]);

pivot.setMeasure('value');
pivot.setAggregator('avg');

pivot.view.refresh(true);
</code></pre>
 * <p>See the {@link Ext.grid.PivotAxis PivotAxis} documentation for further detail on reconfiguring axes.</p>
 */
Ext.grid.PivotGrid = Ext.extend(Ext.grid.GridPanel, {
    
    /**
     * @cfg {String|Function} aggregator The aggregation function to use to combine the measures extracted
     * for each dimension combination. Can be any of the built-in aggregators (sum, count, avg, min, max).
     * Can also be a function which accepts two arguments (an array of Records to aggregate, and the measure 
     * to aggregate them on) and should return a String.
     */
    aggregator: 'sum',
    
    /**
     * @cfg {Function} renderer Optional renderer to pass values through before they are rendered to the dom. This
     * gives an opportunity to modify cell contents after the value has been computed.
     */
    renderer: undefined,
    
    /**
     * @cfg {String} measure The field to extract from each Record when pivoting around the two axes. See the class
     * introduction docs for usage
     */
    
    /**
     * @cfg {Array|Ext.grid.PivotAxis} leftAxis Either and array of {@link #dimension} to use on the left axis, or
     * a {@link Ext.grid.PivotAxis} instance. If an array is passed, it is turned into a PivotAxis internally.
     */
    
    /**
     * @cfg {Array|Ext.grid.PivotAxis} topAxis Either and array of {@link #dimension} to use on the top axis, or
     * a {@link Ext.grid.PivotAxis} instance. If an array is passed, it is turned into a PivotAxis internally.
     */
    
    //inherit docs
    initComponent: function() {
        Ext.grid.PivotGrid.superclass.initComponent.apply(this, arguments);
        
        this.initAxes();
        
        //no resizing of columns is allowed yet in PivotGrid
        this.enableColumnResize = false;
        
        this.viewConfig = Ext.apply(this.viewConfig || {}, {
            forceFit: true
        });
        
        //TODO: dummy col model that is never used - GridView is too tightly integrated with ColumnModel
        //in 3.x to remove this altogether.
        this.colModel = new Ext.grid.ColumnModel({});
    },
    
    /**
     * Returns the function currently used to aggregate the records in each Pivot cell
     * @return {Function} The current aggregator function
     */
    getAggregator: function() {
        if (typeof this.aggregator == 'string') {
            return Ext.grid.PivotAggregatorMgr.types[this.aggregator];
        } else {
            return this.aggregator;
        }
    },
    
    /**
     * Sets the function to use when aggregating data for each cell.
     * @param {String|Function} aggregator The new aggregator function or named function string
     */
    setAggregator: function(aggregator) {
        this.aggregator = aggregator;
    },
    
    /**
     * Sets the field name to use as the Measure in this Pivot Grid
     * @param {String} measure The field to make the measure
     */
    setMeasure: function(measure) {
        this.measure = measure;
    },
    
    /**
     * Sets the left axis of this pivot grid. Optionally refreshes the grid afterwards.
     * @param {Ext.grid.PivotAxis} axis The pivot axis
     * @param {Boolean} refresh True to immediately refresh the grid and its axes (defaults to false)
     */
    setLeftAxis: function(axis, refresh) {
        /**
         * The configured {@link Ext.grid.PivotAxis} used as the left Axis for this Pivot Grid
         * @property leftAxis
         * @type Ext.grid.PivotAxis
         */
        this.leftAxis = axis;
        
        if (refresh) {
            this.view.refresh();
        }
    },
    
    /**
     * Sets the top axis of this pivot grid. Optionally refreshes the grid afterwards.
     * @param {Ext.grid.PivotAxis} axis The pivot axis
     * @param {Boolean} refresh True to immediately refresh the grid and its axes (defaults to false)
     */
    setTopAxis: function(axis, refresh) {
        /**
         * The configured {@link Ext.grid.PivotAxis} used as the top Axis for this Pivot Grid
         * @property topAxis
         * @type Ext.grid.PivotAxis
         */
        this.topAxis = axis;
        
        if (refresh) {
            this.view.refresh();
        }
    },
    
    /**
     * @private
     * Creates the top and left axes. Should usually only need to be called once from initComponent
     */
    initAxes: function() {
        var PivotAxis = Ext.grid.PivotAxis;
        
        if (!(this.leftAxis instanceof PivotAxis)) {
            this.setLeftAxis(new PivotAxis({
                orientation: 'vertical',
                dimensions : this.leftAxis || [],
                store      : this.store
            }));
        };
        
        if (!(this.topAxis instanceof PivotAxis)) {
            this.setTopAxis(new PivotAxis({
                orientation: 'horizontal',
                dimensions : this.topAxis || [],
                store      : this.store
            }));
        };
    },
    
    /**
     * @private
     * @return {Array} 2-dimensional array of cell data
     */
    extractData: function() {
        var records  = this.store.data.items,
            recCount = records.length,
            cells    = [],
            record, i, j, k;
        
        if (recCount == 0) {
            return [];
        }
        
        var leftTuples = this.leftAxis.getTuples(),
            leftCount  = leftTuples.length,
            topTuples  = this.topAxis.getTuples(),
            topCount   = topTuples.length,
            aggregator = this.getAggregator();
        
        for (i = 0; i < recCount; i++) {
            record = records[i];
            
            for (j = 0; j < leftCount; j++) {
                cells[j] = cells[j] || [];
                
                if (leftTuples[j].matcher(record) === true) {
                    for (k = 0; k < topCount; k++) {
                        cells[j][k] = cells[j][k] || [];
                        
                        if (topTuples[k].matcher(record)) {
                            cells[j][k].push(record);
                        }
                    }
                }
            }
        }
        
        var rowCount = cells.length,
            colCount, row;
        
        for (i = 0; i < rowCount; i++) {
            row = cells[i];
            colCount = row.length;
            
            for (j = 0; j < colCount; j++) {
                cells[i][j] = aggregator(cells[i][j], this.measure);
            }
        }
        
        return cells;
    },
    
    /**
     * Returns the grid's GridView object.
     * @return {Ext.grid.PivotGridView} The grid view
     */
    getView: function() {
        if (!this.view) {
            this.view = new Ext.grid.PivotGridView(this.viewConfig);
        }
        
        return this.view;
    }
});

Ext.reg('pivotgrid', Ext.grid.PivotGrid);


Ext.grid.PivotAggregatorMgr = new Ext.AbstractManager();

Ext.grid.PivotAggregatorMgr.registerType('sum', function(records, measure) {
    var length = records.length,
        total  = 0,
        i;
    
    for (i = 0; i < length; i++) {
        total += records[i].get(measure);
    }
    
    return total;
});

Ext.grid.PivotAggregatorMgr.registerType('avg', function(records, measure) {
    var length = records.length,
        total  = 0,
        i;
    
    for (i = 0; i < length; i++) {
        total += records[i].get(measure);
    }
    
    return (total / length) || 'n/a';
});

Ext.grid.PivotAggregatorMgr.registerType('min', function(records, measure) {
    var data   = [],
        length = records.length,
        i;
    
    for (i = 0; i < length; i++) {
        data.push(records[i].get(measure));
    }
    
    return Math.min.apply(this, data) || 'n/a';
});

Ext.grid.PivotAggregatorMgr.registerType('max', function(records, measure) {
    var data   = [],
        length = records.length,
        i;
    
    for (i = 0; i < length; i++) {
        data.push(records[i].get(measure));
    }
    
    return Math.max.apply(this, data) || 'n/a';
});

Ext.grid.PivotAggregatorMgr.registerType('count', function(records, measure) {
    return records.length;
});/**
 * @class Ext.grid.GridView
 * @extends Ext.util.Observable
 * <p>This class encapsulates the user interface of an {@link Ext.grid.GridPanel}.
 * Methods of this class may be used to access user interface elements to enable
 * special display effects. Do not change the DOM structure of the user interface.</p>
 * <p>This class does not provide ways to manipulate the underlying data. The data
 * model of a Grid is held in an {@link Ext.data.Store}.</p>
 * @constructor
 * @param {Object} config
 */
Ext.grid.GridView = Ext.extend(Ext.util.Observable, {
    /**
     * Override this function to apply custom CSS classes to rows during rendering.  You can also supply custom
     * parameters to the row template for the current row to customize how it is rendered using the <b>rowParams</b>
     * parameter.  This function should return the CSS class name (or empty string '' for none) that will be added
     * to the row's wrapping div.  To apply multiple class names, simply return them space-delimited within the string
     * (e.g., 'my-class another-class'). Example usage:
    <pre><code>
viewConfig: {
    forceFit: true,
    showPreview: true, // custom property
    enableRowBody: true, // required to create a second, full-width row to show expanded Record data
    getRowClass: function(record, rowIndex, rp, ds){ // rp = rowParams
        if(this.showPreview){
            rp.body = '&lt;p>'+record.data.excerpt+'&lt;/p>';
            return 'x-grid3-row-expanded';
        }
        return 'x-grid3-row-collapsed';
    }
},
    </code></pre>
     * @param {Record} record The {@link Ext.data.Record} corresponding to the current row.
     * @param {Number} index The row index.
     * @param {Object} rowParams A config object that is passed to the row template during rendering that allows
     * customization of various aspects of a grid row.
     * <p>If {@link #enableRowBody} is configured <b><tt></tt>true</b>, then the following properties may be set
     * by this function, and will be used to render a full-width expansion row below each grid row:</p>
     * <ul>
     * <li><code>body</code> : String <div class="sub-desc">An HTML fragment to be used as the expansion row's body content (defaults to '').</div></li>
     * <li><code>bodyStyle</code> : String <div class="sub-desc">A CSS style specification that will be applied to the expansion row's &lt;tr> element. (defaults to '').</div></li>
     * </ul>
     * The following property will be passed in, and may be appended to:
     * <ul>
     * <li><code>tstyle</code> : String <div class="sub-desc">A CSS style specification that willl be applied to the &lt;table> element which encapsulates
     * both the standard grid row, and any expansion row.</div></li>
     * </ul>
     * @param {Store} store The {@link Ext.data.Store} this grid is bound to
     * @method getRowClass
     * @return {String} a CSS class name to add to the row.
     */

    /**
     * @cfg {Boolean} enableRowBody True to add a second TR element per row that can be used to provide a row body
     * that spans beneath the data row.  Use the {@link #getRowClass} method's rowParams config to customize the row body.
     */

    /**
     * @cfg {String} emptyText Default text (html tags are accepted) to display in the grid body when no rows
     * are available (defaults to ''). This value will be used to update the <tt>{@link #mainBody}</tt>:
    <pre><code>
    this.mainBody.update('&lt;div class="x-grid-empty">' + this.emptyText + '&lt;/div>');
    </code></pre>
     */

    /**
     * @cfg {Boolean} headersDisabled True to disable the grid column headers (defaults to <tt>false</tt>).
     * Use the {@link Ext.grid.ColumnModel ColumnModel} <tt>{@link Ext.grid.ColumnModel#menuDisabled menuDisabled}</tt>
     * config to disable the <i>menu</i> for individual columns.  While this config is true the
     * following will be disabled:<div class="mdetail-params"><ul>
     * <li>clicking on header to sort</li>
     * <li>the trigger to reveal the menu.</li>
     * </ul></div>
     */

    /**
     * <p>A customized implementation of a {@link Ext.dd.DragZone DragZone} which provides default implementations
     * of the template methods of DragZone to enable dragging of the selected rows of a GridPanel.
     * See {@link Ext.grid.GridDragZone} for details.</p>
     * <p>This will <b>only</b> be present:<div class="mdetail-params"><ul>
     * <li><i>if</i> the owning GridPanel was configured with {@link Ext.grid.GridPanel#enableDragDrop enableDragDrop}: <tt>true</tt>.</li>
     * <li><i>after</i> the owning GridPanel has been rendered.</li>
     * </ul></div>
     * @property dragZone
     * @type {Ext.grid.GridDragZone}
     */

    /**
     * @cfg {Boolean} deferEmptyText True to defer <tt>{@link #emptyText}</tt> being applied until the store's
     * first load (defaults to <tt>true</tt>).
     */
    deferEmptyText : true,

    /**
     * @cfg {Number} scrollOffset The amount of space to reserve for the vertical scrollbar
     * (defaults to <tt>undefined</tt>). If an explicit value isn't specified, this will be automatically
     * calculated.
     */
    scrollOffset : undefined,

    /**
     * @cfg {Boolean} autoFill
     * Defaults to <tt>false</tt>.  Specify <tt>true</tt> to have the column widths re-proportioned
     * when the grid is <b>initially rendered</b>.  The
     * {@link Ext.grid.Column#width initially configured width}</tt> of each column will be adjusted
     * to fit the grid width and prevent horizontal scrolling. If columns are later resized (manually
     * or programmatically), the other columns in the grid will <b>not</b> be resized to fit the grid width.
     * See <tt>{@link #forceFit}</tt> also.
     */
    autoFill : false,

    /**
     * @cfg {Boolean} forceFit
     * <p>Defaults to <tt>false</tt>.  Specify <tt>true</tt> to have the column widths re-proportioned
     * at <b>all times</b>.</p>
     * <p>The {@link Ext.grid.Column#width initially configured width}</tt> of each
     * column will be adjusted to fit the grid width and prevent horizontal scrolling. If columns are
     * later resized (manually or programmatically), the other columns in the grid <b>will</b> be resized
     * to fit the grid width.</p>
     * <p>Columns which are configured with <code>fixed: true</code> are omitted from being resized.</p>
     * <p>See <tt>{@link #autoFill}</tt>.</p>
     */
    forceFit : false,

    /**
     * @cfg {Array} sortClasses The CSS classes applied to a header when it is sorted. (defaults to <tt>['sort-asc', 'sort-desc']</tt>)
     */
    sortClasses : ['sort-asc', 'sort-desc'],

    /**
     * @cfg {String} sortAscText The text displayed in the 'Sort Ascending' menu item (defaults to <tt>'Sort Ascending'</tt>)
     */
    sortAscText : 'Sort Ascending',

    /**
     * @cfg {String} sortDescText The text displayed in the 'Sort Descending' menu item (defaults to <tt>'Sort Descending'</tt>)
     */
    sortDescText : 'Sort Descending',
    
    /**
     * @cfg {Boolean} hideSortIcons True to hide the sorting icons if sorting is disabled for a column. Defaults to <tt>false</tt>
     */
    hideSortIcons: false,

    /**
     * @cfg {String} columnsText The text displayed in the 'Columns' menu item (defaults to <tt>'Columns'</tt>)
     */
    columnsText : 'Columns',

    /**
     * @cfg {String} selectedRowClass The CSS class applied to a selected row (defaults to <tt>'x-grid3-row-selected'</tt>). An
     * example overriding the default styling:
    <pre><code>
    .x-grid3-row-selected {background-color: yellow;}
    </code></pre>
     * Note that this only controls the row, and will not do anything for the text inside it.  To style inner
     * facets (like text) use something like:
    <pre><code>
    .x-grid3-row-selected .x-grid3-cell-inner {
        color: #FFCC00;
    }
    </code></pre>
     * @type String
     */
    selectedRowClass : 'x-grid3-row-selected',

    // private
    borderWidth : 2,
    tdClass : 'x-grid3-cell',
    hdCls : 'x-grid3-hd',
    
    
    /**
     * @cfg {Boolean} markDirty True to show the dirty cell indicator when a cell has been modified. Defaults to <tt>true</tt>.
     */
    markDirty : true,

    /**
     * @cfg {Number} cellSelectorDepth The number of levels to search for cells in event delegation (defaults to <tt>4</tt>)
     */
    cellSelectorDepth : 4,
    
    /**
     * @cfg {Number} rowSelectorDepth The number of levels to search for rows in event delegation (defaults to <tt>10</tt>)
     */
    rowSelectorDepth : 10,

    /**
     * @cfg {Number} rowBodySelectorDepth The number of levels to search for row bodies in event delegation (defaults to <tt>10</tt>)
     */
    rowBodySelectorDepth : 10,

    /**
     * @cfg {String} cellSelector The selector used to find cells internally (defaults to <tt>'td.x-grid3-cell'</tt>)
     */
    cellSelector : 'td.x-grid3-cell',
    
    /**
     * @cfg {String} rowSelector The selector used to find rows internally (defaults to <tt>'div.x-grid3-row'</tt>)
     */
    rowSelector : 'div.x-grid3-row',

    /**
     * @cfg {String} rowBodySelector The selector used to find row bodies internally (defaults to <tt>'div.x-grid3-row'</tt>)
     */
    rowBodySelector : 'div.x-grid3-row-body',

    // private
    firstRowCls: 'x-grid3-row-first',
    lastRowCls: 'x-grid3-row-last',
    rowClsRe: /(?:^|\s+)x-grid3-row-(first|last|alt)(?:\s+|$)/g,
    
    /**
     * @cfg {String} headerMenuOpenCls The CSS class to add to the header cell when its menu is visible. Defaults to 'x-grid3-hd-menu-open'
     */
    headerMenuOpenCls: 'x-grid3-hd-menu-open',
    
    /**
     * @cfg {String} rowOverCls The CSS class added to each row when it is hovered over. Defaults to 'x-grid3-row-over'
     */
    rowOverCls: 'x-grid3-row-over',

    constructor : function(config) {
        Ext.apply(this, config);
        
        // These events are only used internally by the grid components
        this.addEvents(
            /**
             * @event beforerowremoved
             * Internal UI Event. Fired before a row is removed.
             * @param {Ext.grid.GridView} view
             * @param {Number} rowIndex The index of the row to be removed.
             * @param {Ext.data.Record} record The Record to be removed
             */
            'beforerowremoved',
            
            /**
             * @event beforerowsinserted
             * Internal UI Event. Fired before rows are inserted.
             * @param {Ext.grid.GridView} view
             * @param {Number} firstRow The index of the first row to be inserted.
             * @param {Number} lastRow The index of the last row to be inserted.
             */
            'beforerowsinserted',
            
            /**
             * @event beforerefresh
             * Internal UI Event. Fired before the view is refreshed.
             * @param {Ext.grid.GridView} view
             */
            'beforerefresh',
            
            /**
             * @event rowremoved
             * Internal UI Event. Fired after a row is removed.
             * @param {Ext.grid.GridView} view
             * @param {Number} rowIndex The index of the row that was removed.
             * @param {Ext.data.Record} record The Record that was removed
             */
            'rowremoved',
            
            /**
             * @event rowsinserted
             * Internal UI Event. Fired after rows are inserted.
             * @param {Ext.grid.GridView} view
             * @param {Number} firstRow The index of the first inserted.
             * @param {Number} lastRow The index of the last row inserted.
             */
            'rowsinserted',
            
            /**
             * @event rowupdated
             * Internal UI Event. Fired after a row has been updated.
             * @param {Ext.grid.GridView} view
             * @param {Number} firstRow The index of the row updated.
             * @param {Ext.data.record} record The Record backing the row updated.
             */
            'rowupdated',
            
            /**
             * @event refresh
             * Internal UI Event. Fired after the GridView's body has been refreshed.
             * @param {Ext.grid.GridView} view
             */
            'refresh'
        );
        
        Ext.grid.GridView.superclass.constructor.call(this);
    },

    /* -------------------------------- UI Specific ----------------------------- */
    
    /**
     * The master template to use when rendering the GridView. Has a default template
     * @property Ext.Template
     * @type masterTpl
     */
    masterTpl: new Ext.Template(
        '<div class="x-grid3" hidefocus="true">',
            '<div class="x-grid3-viewport">',
                '<div class="x-grid3-header">',
                    '<div class="x-grid3-header-inner">',
                        '<div class="x-grid3-header-offset" style="{ostyle}">{header}</div>',
                    '</div>',
                    '<div class="x-clear"></div>',
                '</div>',
                '<div class="x-grid3-scroller">',
                    '<div class="x-grid3-body" style="{bstyle}">{body}</div>',
                    '<a href="#" class="x-grid3-focus" tabIndex="-1"></a>',
                '</div>',
            '</div>',
            '<div class="x-grid3-resize-marker">&#160;</div>',
            '<div class="x-grid3-resize-proxy">&#160;</div>',
        '</div>'
    ),
    
    /**
     * The template to use when rendering headers. Has a default template
     * @property headerTpl
     * @type Ext.Template
     */
    headerTpl: new Ext.Template(
        '<table border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
            '<thead>',
                '<tr class="x-grid3-hd-row">{cells}</tr>',
            '</thead>',
        '</table>'
    ),
    
    /**
     * The template to use when rendering the body. Has a default template
     * @property bodyTpl
     * @type Ext.Template
     */
    bodyTpl: new Ext.Template('{rows}'),
    
    /**
     * The template to use to render each cell. Has a default template
     * @property cellTpl
     * @type Ext.Template
     */
    cellTpl: new Ext.Template(
        '<td class="x-grid3-col x-grid3-cell x-grid3-td-{id} {css}" style="{style}" tabIndex="0" {cellAttr}>',
            '<div class="x-grid3-cell-inner x-grid3-col-{id} x-unselectable" unselectable="on" {attr}>{value}</div>',
        '</td>'
    ),
    
    /**
     * @private
     * Provides default templates if they are not given for this particular instance. Most of the templates are defined on
     * the prototype, the ones defined inside this function are done so because they are based on Grid or GridView configuration
     */
    initTemplates : function() {
        var templates = this.templates || {},
            template, name,
            
            headerCellTpl = new Ext.Template(
                '<td class="x-grid3-hd x-grid3-cell x-grid3-td-{id} {css}" style="{style}">',
                    '<div {tooltip} {attr} class="x-grid3-hd-inner x-grid3-hd-{id}" unselectable="on" style="{istyle}">', 
                        this.grid.enableHdMenu ? '<a class="x-grid3-hd-btn" href="#"></a>' : '',
                        '{value}',
                        '<img alt="" class="x-grid3-sort-icon" src="', Ext.BLANK_IMAGE_URL, '" />',
                    '</div>',
                '</td>'
            ),
        
            rowBodyText = [
                '<tr class="x-grid3-row-body-tr" style="{bodyStyle}">',
                    '<td colspan="{cols}" class="x-grid3-body-cell" tabIndex="0" hidefocus="on">',
                        '<div class="x-grid3-row-body">{body}</div>',
                    '</td>',
                '</tr>'
            ].join(""),
        
            innerText = [
                '<table class="x-grid3-row-table" border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
                     '<tbody>',
                        '<tr>{cells}</tr>',
                        this.enableRowBody ? rowBodyText : '',
                     '</tbody>',
                '</table>'
            ].join("");
        
        Ext.applyIf(templates, {
            hcell   : headerCellTpl,
            cell    : this.cellTpl,
            body    : this.bodyTpl,
            header  : this.headerTpl,
            master  : this.masterTpl,
            row     : new Ext.Template('<div class="x-grid3-row {alt}" style="{tstyle}">' + innerText + '</div>'),
            rowInner: new Ext.Template(innerText)
        });

        for (name in templates) {
            template = templates[name];
            
            if (template && Ext.isFunction(template.compile) && !template.compiled) {
                template.disableFormats = true;
                template.compile();
            }
        }

        this.templates = templates;
        this.colRe = new RegExp('x-grid3-td-([^\\s]+)', '');
    },

    /**
     * @private
     * Each GridView has its own private flyweight, accessed through this method
     */
    fly : function(el) {
        if (!this._flyweight) {
            this._flyweight = new Ext.Element.Flyweight(document.body);
        }
        this._flyweight.dom = el;
        return this._flyweight;
    },

    // private
    getEditorParent : function() {
        return this.scroller.dom;
    },

    /**
     * @private
     * Finds and stores references to important elements
     */
    initElements : function() {
        var Element  = Ext.Element,
            el       = Ext.get(this.grid.getGridEl().dom.firstChild),
            mainWrap = new Element(el.child('div.x-grid3-viewport')),
            mainHd   = new Element(mainWrap.child('div.x-grid3-header')),
            scroller = new Element(mainWrap.child('div.x-grid3-scroller'));
        
        if (this.grid.hideHeaders) {
            mainHd.setDisplayed(false);
        }
        
        if (this.forceFit) {
            scroller.setStyle('overflow-x', 'hidden');
        }
        
        /**
         * <i>Read-only</i>. The GridView's body Element which encapsulates all rows in the Grid.
         * This {@link Ext.Element Element} is only available after the GridPanel has been rendered.
         * @type Ext.Element
         * @property mainBody
         */
        
        Ext.apply(this, {
            el      : el,
            mainWrap: mainWrap,
            scroller: scroller,
            mainHd  : mainHd,
            innerHd : mainHd.child('div.x-grid3-header-inner').dom,
            mainBody: new Element(Element.fly(scroller).child('div.x-grid3-body')),
            focusEl : new Element(Element.fly(scroller).child('a')),
            
            resizeMarker: new Element(el.child('div.x-grid3-resize-marker')),
            resizeProxy : new Element(el.child('div.x-grid3-resize-proxy'))
        });
        
        this.focusEl.swallowEvent('click', true);
    },

    // private
    getRows : function() {
        return this.hasRows() ? this.mainBody.dom.childNodes : [];
    },

    // finder methods, used with delegation

    // private
    findCell : function(el) {
        if (!el) {
            return false;
        }
        return this.fly(el).findParent(this.cellSelector, this.cellSelectorDepth);
    },

    /**
     * <p>Return the index of the grid column which contains the passed HTMLElement.</p>
     * See also {@link #findRowIndex}
     * @param {HTMLElement} el The target element
     * @return {Number} The column index, or <b>false</b> if the target element is not within a row of this GridView.
     */
    findCellIndex : function(el, requiredCls) {
        var cell = this.findCell(el),
            hasCls;
        
        if (cell) {
            hasCls = this.fly(cell).hasClass(requiredCls);
            if (!requiredCls || hasCls) {
                return this.getCellIndex(cell);
            }
        }
        return false;
    },

    // private
    getCellIndex : function(el) {
        if (el) {
            var match = el.className.match(this.colRe);
            
            if (match && match[1]) {
                return this.cm.getIndexById(match[1]);
            }
        }
        return false;
    },

    // private
    findHeaderCell : function(el) {
        var cell = this.findCell(el);
        return cell && this.fly(cell).hasClass(this.hdCls) ? cell : null;
    },

    // private
    findHeaderIndex : function(el){
        return this.findCellIndex(el, this.hdCls);
    },

    /**
     * Return the HtmlElement representing the grid row which contains the passed element.
     * @param {HTMLElement} el The target HTMLElement
     * @return {HTMLElement} The row element, or null if the target element is not within a row of this GridView.
     */
    findRow : function(el) {
        if (!el) {
            return false;
        }
        return this.fly(el).findParent(this.rowSelector, this.rowSelectorDepth);
    },

    /**
     * Return the index of the grid row which contains the passed HTMLElement.
     * See also {@link #findCellIndex}
     * @param {HTMLElement} el The target HTMLElement
     * @return {Number} The row index, or <b>false</b> if the target element is not within a row of this GridView.
     */
    findRowIndex : function(el) {
        var row = this.findRow(el);
        return row ? row.rowIndex : false;
    },

    /**
     * Return the HtmlElement representing the grid row body which contains the passed element.
     * @param {HTMLElement} el The target HTMLElement
     * @return {HTMLElement} The row body element, or null if the target element is not within a row body of this GridView.
     */
    findRowBody : function(el) {
        if (!el) {
            return false;
        }
        
        return this.fly(el).findParent(this.rowBodySelector, this.rowBodySelectorDepth);
    },

    // getter methods for fetching elements dynamically in the grid

    /**
     * Return the <tt>&lt;div></tt> HtmlElement which represents a Grid row for the specified index.
     * @param {Number} index The row index
     * @return {HtmlElement} The div element.
     */
    getRow : function(row) {
        return this.getRows()[row];
    },

    /**
     * Returns the grid's <tt>&lt;td></tt> HtmlElement at the specified coordinates.
     * @param {Number} row The row index in which to find the cell.
     * @param {Number} col The column index of the cell.
     * @return {HtmlElement} The td at the specified coordinates.
     */
    getCell : function(row, col) {
        return Ext.fly(this.getRow(row)).query(this.cellSelector)[col]; 
    },

    /**
     * Return the <tt>&lt;td></tt> HtmlElement which represents the Grid's header cell for the specified column index.
     * @param {Number} index The column index
     * @return {HtmlElement} The td element.
     */
    getHeaderCell : function(index) {
        return this.mainHd.dom.getElementsByTagName('td')[index];
    },

    // manipulating elements

    // private - use getRowClass to apply custom row classes
    addRowClass : function(rowId, cls) {
        var row = this.getRow(rowId);
        if (row) {
            this.fly(row).addClass(cls);
        }
    },

    // private
    removeRowClass : function(row, cls) {
        var r = this.getRow(row);
        if(r){
            this.fly(r).removeClass(cls);
        }
    },

    // private
    removeRow : function(row) {
        Ext.removeNode(this.getRow(row));
        this.syncFocusEl(row);
    },

    // private
    removeRows : function(firstRow, lastRow) {
        var bd = this.mainBody.dom,
            rowIndex;
            
        for (rowIndex = firstRow; rowIndex <= lastRow; rowIndex++){
            Ext.removeNode(bd.childNodes[firstRow]);
        }
        
        this.syncFocusEl(firstRow);
    },

    /* ----------------------------------- Scrolling functions -------------------------------------------*/
    
    // private
    getScrollState : function() {
        var sb = this.scroller.dom;
        
        return {
            left: sb.scrollLeft, 
            top : sb.scrollTop
        };
    },

    // private
    restoreScroll : function(state) {
        var sb = this.scroller.dom;
        sb.scrollLeft = state.left;
        sb.scrollTop  = state.top;
    },

    /**
     * Scrolls the grid to the top
     */
    scrollToTop : function() {
        var dom = this.scroller.dom;
        
        dom.scrollTop  = 0;
        dom.scrollLeft = 0;
    },

    // private
    syncScroll : function() {
        this.syncHeaderScroll();
        var mb = this.scroller.dom;
        this.grid.fireEvent('bodyscroll', mb.scrollLeft, mb.scrollTop);
    },

    // private
    syncHeaderScroll : function() {
        var innerHd    = this.innerHd,
            scrollLeft = this.scroller.dom.scrollLeft;
        
        innerHd.scrollLeft = scrollLeft;
        innerHd.scrollLeft = scrollLeft; // second time for IE (1/2 time first fails, other browsers ignore)
    },
    
    /**
     * @private
     * Ensures the given column has the given icon class
     */
    updateSortIcon : function(col, dir) {
        var sortClasses = this.sortClasses,
            sortClass   = sortClasses[dir == "DESC" ? 1 : 0],
            headers     = this.mainHd.select('td').removeClass(sortClasses);
        
        headers.item(col).addClass(sortClass);
    },

    /**
     * @private
     * Updates the size of every column and cell in the grid
     */
    updateAllColumnWidths : function() {
        var totalWidth = this.getTotalWidth(),
            colCount   = this.cm.getColumnCount(),
            rows       = this.getRows(),
            rowCount   = rows.length,
            widths     = [],
            row, rowFirstChild, trow, i, j;
        
        for (i = 0; i < colCount; i++) {
            widths[i] = this.getColumnWidth(i);
            this.getHeaderCell(i).style.width = widths[i];
        }
        
        this.updateHeaderWidth();
        
        for (i = 0; i < rowCount; i++) {
            row = rows[i];
            row.style.width = totalWidth;
            rowFirstChild = row.firstChild;
            
            if (rowFirstChild) {
                rowFirstChild.style.width = totalWidth;
                trow = rowFirstChild.rows[0];
                
                for (j = 0; j < colCount; j++) {
                    trow.childNodes[j].style.width = widths[j];
                }
            }
        }
        
        this.onAllColumnWidthsUpdated(widths, totalWidth);
    },

    /**
     * @private
     * Called after a column's width has been updated, this resizes all of the cells for that column in each row
     * @param {Number} column The column index
     */
    updateColumnWidth : function(column, width) {
        var columnWidth = this.getColumnWidth(column),
            totalWidth  = this.getTotalWidth(),
            headerCell  = this.getHeaderCell(column),
            nodes       = this.getRows(),
            nodeCount   = nodes.length,
            row, i, firstChild;
        
        this.updateHeaderWidth();
        headerCell.style.width = columnWidth;
        
        for (i = 0; i < nodeCount; i++) {
            row = nodes[i];
            firstChild = row.firstChild;
            
            row.style.width = totalWidth;
            if (firstChild) {
                firstChild.style.width = totalWidth;
                firstChild.rows[0].childNodes[column].style.width = columnWidth;
            }
        }
        
        this.onColumnWidthUpdated(column, columnWidth, totalWidth);
    },
    
    /**
     * @private
     * Sets the hidden status of a given column.
     * @param {Number} col The column index
     * @param {Boolean} hidden True to make the column hidden
     */
    updateColumnHidden : function(col, hidden) {
        var totalWidth = this.getTotalWidth(),
            display    = hidden ? 'none' : '',
            headerCell = this.getHeaderCell(col),
            nodes      = this.getRows(),
            nodeCount  = nodes.length,
            row, rowFirstChild, i;
        
        this.updateHeaderWidth();
        headerCell.style.display = display;
        
        for (i = 0; i < nodeCount; i++) {
            row = nodes[i];
            row.style.width = totalWidth;
            rowFirstChild = row.firstChild;
            
            if (rowFirstChild) {
                rowFirstChild.style.width = totalWidth;
                rowFirstChild.rows[0].childNodes[col].style.display = display;
            }
        }
        
        this.onColumnHiddenUpdated(col, hidden, totalWidth);
        delete this.lastViewWidth; //recalc
        this.layout();
    },

    /**
     * @private
     * Renders all of the rows to a string buffer and returns the string. This is called internally
     * by renderRows and performs the actual string building for the rows - it does not inject HTML into the DOM.
     * @param {Array} columns The column data acquired from getColumnData.
     * @param {Array} records The array of records to render
     * @param {Ext.data.Store} store The store to render the rows from
     * @param {Number} startRow The index of the first row being rendered. Sometimes we only render a subset of
     * the rows so this is used to maintain logic for striping etc
     * @param {Number} colCount The total number of columns in the column model
     * @param {Boolean} stripe True to stripe the rows
     * @return {String} A string containing the HTML for the rendered rows
     */
    doRender : function(columns, records, store, startRow, colCount, stripe) {
        var templates = this.templates,
            cellTemplate = templates.cell,
            rowTemplate = templates.row,
            last = colCount - 1,
            tstyle = 'width:' + this.getTotalWidth() + ';',
            // buffers
            rowBuffer = [],
            colBuffer = [],
            rowParams = {tstyle: tstyle},
            meta = {},
            len  = records.length,
            alt,
            column,
            record, i, j, rowIndex;

        //build up each row's HTML
        for (j = 0; j < len; j++) {
            record    = records[j];
            colBuffer = [];

            rowIndex = j + startRow;

            //build up each column's HTML
            for (i = 0; i < colCount; i++) {
                column = columns[i];
                
                meta.id    = column.id;
                meta.css   = i === 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
                meta.attr  = meta.cellAttr = '';
                meta.style = column.style;
                meta.value = column.renderer.call(column.scope, record.data[column.name], meta, record, rowIndex, i, store);

                if (Ext.isEmpty(meta.value)) {
                    meta.value = '&#160;';
                }

                if (this.markDirty && record.dirty && typeof record.modified[column.name] != 'undefined') {
                    meta.css += ' x-grid3-dirty-cell';
                }

                colBuffer[colBuffer.length] = cellTemplate.apply(meta);
            }

            alt = [];
            //set up row striping and row dirtiness CSS classes
            if (stripe && ((rowIndex + 1) % 2 === 0)) {
                alt[0] = 'x-grid3-row-alt';
            }

            if (record.dirty) {
                alt[1] = ' x-grid3-dirty-row';
            }

            rowParams.cols = colCount;

            if (this.getRowClass) {
                alt[2] = this.getRowClass(record, rowIndex, rowParams, store);
            }

            rowParams.alt   = alt.join(' ');
            rowParams.cells = colBuffer.join('');

            rowBuffer[rowBuffer.length] = rowTemplate.apply(rowParams);
        }

        return rowBuffer.join('');
    },

    /**
     * @private
     * Adds CSS classes and rowIndex to each row
     * @param {Number} startRow The row to start from (defaults to 0)
     */
    processRows : function(startRow, skipStripe) {
        if (!this.ds || this.ds.getCount() < 1) {
            return;
        }

        var rows   = this.getRows(),
            length = rows.length,
            row, i;

        skipStripe = skipStripe || !this.grid.stripeRows;
        startRow   = startRow   || 0;

        for (i = 0; i < length; i++) {
            row = rows[i];
            if (row) {
                row.rowIndex = i;
                if (!skipStripe) {
                    row.className = row.className.replace(this.rowClsRe, ' ');
                    if ((i + 1) % 2 === 0){
                        row.className += ' x-grid3-row-alt';
                    }
                }
            }
        }

        // add first/last-row classes
        if (startRow === 0) {
            Ext.fly(rows[0]).addClass(this.firstRowCls);
        }

        Ext.fly(rows[length - 1]).addClass(this.lastRowCls);
    },
    
    /**
     * @private
     */
    afterRender : function() {
        if (!this.ds || !this.cm) {
            return;
        }
        
        this.mainBody.dom.innerHTML = this.renderBody() || '&#160;';
        this.processRows(0, true);

        if (this.deferEmptyText !== true) {
            this.applyEmptyText();
        }
        
        this.grid.fireEvent('viewready', this.grid);
    },
    
    /**
     * @private
     * This is always intended to be called after renderUI. Sets up listeners on the UI elements
     * and sets up options like column menus, moving and resizing.
     */
    afterRenderUI: function() {
        var grid = this.grid;
        
        this.initElements();

        // get mousedowns early
        Ext.fly(this.innerHd).on('click', this.handleHdDown, this);

        this.mainHd.on({
            scope    : this,
            mouseover: this.handleHdOver,
            mouseout : this.handleHdOut,
            mousemove: this.handleHdMove
        });

        this.scroller.on('scroll', this.syncScroll,  this);
        
        if (grid.enableColumnResize !== false) {
            this.splitZone = new Ext.grid.GridView.SplitDragZone(grid, this.mainHd.dom);
        }

        if (grid.enableColumnMove) {
            this.columnDrag = new Ext.grid.GridView.ColumnDragZone(grid, this.innerHd);
            this.columnDrop = new Ext.grid.HeaderDropZone(grid, this.mainHd.dom);
        }

        if (grid.enableHdMenu !== false) {
            this.hmenu = new Ext.menu.Menu({id: grid.id + '-hctx'});
            this.hmenu.add(
                {itemId:'asc',  text: this.sortAscText,  cls: 'xg-hmenu-sort-asc'},
                {itemId:'desc', text: this.sortDescText, cls: 'xg-hmenu-sort-desc'}
            );

            if (grid.enableColumnHide !== false) {
                this.colMenu = new Ext.menu.Menu({id:grid.id + '-hcols-menu'});
                this.colMenu.on({
                    scope     : this,
                    beforeshow: this.beforeColMenuShow,
                    itemclick : this.handleHdMenuClick
                });
                this.hmenu.add({
                    itemId: 'sortSep',
                    xtype: 'menuseparator'
                }, {
                    itemId:'columns',
                    hideOnClick: false,
                    text: this.columnsText,
                    menu: this.colMenu,
                    iconCls: 'x-cols-icon'
                });
            }

            this.hmenu.on('itemclick', this.handleHdMenuClick, this);
        }

        if (grid.trackMouseOver) {
            this.mainBody.on({
                scope    : this,
                mouseover: this.onRowOver,
                mouseout : this.onRowOut
            });
        }

        if (grid.enableDragDrop || grid.enableDrag) {
            this.dragZone = new Ext.grid.GridDragZone(grid, {
                ddGroup : grid.ddGroup || 'GridDD'
            });
        }

        this.updateHeaderSortState();
    },

    /**
     * @private
     * Renders each of the UI elements in turn. This is called internally, once, by this.render. It does not
     * render rows from the store, just the surrounding UI elements.
     */
    renderUI : function() {
        var templates = this.templates;

        return templates.master.apply({
            body  : templates.body.apply({rows:'&#160;'}),
            header: this.renderHeaders(),
            ostyle: 'width:' + this.getOffsetWidth() + ';',
            bstyle: 'width:' + this.getTotalWidth()  + ';'
        });
    },

    // private
    processEvent : function(name, e) {
        var target = e.getTarget(),
            grid   = this.grid,
            header = this.findHeaderIndex(target),
            row, cell, col, body;

        grid.fireEvent(name, e);

        if (header !== false) {
            grid.fireEvent('header' + name, grid, header, e);
        } else {
            row = this.findRowIndex(target);

//          Grid's value-added events must bubble correctly to allow cancelling via returning false: cell->column->row
//          We must allow a return of false at any of these levels to cancel the event processing.
//          Particularly allowing rowmousedown to be cancellable by prior handlers which need to prevent selection.
            if (row !== false) {
                cell = this.findCellIndex(target);
                if (cell !== false) {
                    col = grid.colModel.getColumnAt(cell);
                    if (grid.fireEvent('cell' + name, grid, row, cell, e) !== false) {
                        if (!col || (col.processEvent && (col.processEvent(name, e, grid, row, cell) !== false))) {
                            grid.fireEvent('row' + name, grid, row, e);
                        }
                    }
                } else {
                    if (grid.fireEvent('row' + name, grid, row, e) !== false) {
                        (body = this.findRowBody(target)) && grid.fireEvent('rowbody' + name, grid, row, e);
                    }
                }
            } else {
                grid.fireEvent('container' + name, grid, e);
            }
        }
    },

    /**
     * @private
     * Sizes the grid's header and body elements
     */
    layout : function(initial) {
        if (!this.mainBody) {
            return; // not rendered
        }

        var grid       = this.grid,
            gridEl     = grid.getGridEl(),
            gridSize   = gridEl.getSize(true),
            gridWidth  = gridSize.width,
            gridHeight = gridSize.height,
            scroller   = this.scroller,
            scrollStyle, headerHeight, scrollHeight;
        
        if (gridWidth < 20 || gridHeight < 20) {
            return;
        }
        
        if (grid.autoHeight) {
            scrollStyle = scroller.dom.style;
            scrollStyle.overflow = 'visible';
            
            if (Ext.isWebKit) {
                scrollStyle.position = 'static';
            }
        } else {
            this.el.setSize(gridWidth, gridHeight);
            
            headerHeight = this.mainHd.getHeight();
            scrollHeight = gridHeight - headerHeight;
            
            scroller.setSize(gridWidth, scrollHeight);
            
            if (this.innerHd) {
                this.innerHd.style.width = (gridWidth) + "px";
            }
        }
        
        if (this.forceFit || (initial === true && this.autoFill)) {
            if (this.lastViewWidth != gridWidth) {
                this.fitColumns(false, false);
                this.lastViewWidth = gridWidth;
            }
        } else {
            this.autoExpand();
            this.syncHeaderScroll();
        }
        
        this.onLayout(gridWidth, scrollHeight);
    },

    // template functions for subclasses and plugins
    // these functions include precalculated values
    onLayout : function(vw, vh) {
        // do nothing
    },

    onColumnWidthUpdated : function(col, w, tw) {
        //template method
    },

    onAllColumnWidthsUpdated : function(ws, tw) {
        //template method
    },

    onColumnHiddenUpdated : function(col, hidden, tw) {
        // template method
    },

    updateColumnText : function(col, text) {
        // template method
    },

    afterMove : function(colIndex) {
        // template method
    },

    /* ----------------------------------- Core Specific -------------------------------------------*/
    // private
    init : function(grid) {
        this.grid = grid;

        this.initTemplates();
        this.initData(grid.store, grid.colModel);
        this.initUI(grid);
    },

    // private
    getColumnId : function(index){
        return this.cm.getColumnId(index);
    },

    // private
    getOffsetWidth : function() {
        return (this.cm.getTotalWidth() + this.getScrollOffset()) + 'px';
    },

    // private
    getScrollOffset: function() {
        return Ext.num(this.scrollOffset, Ext.getScrollBarWidth());
    },

    /**
     * @private
     * Renders the header row using the 'header' template. Does not inject the HTML into the DOM, just
     * returns a string.
     * @return {String} Rendered header row
     */
    renderHeaders : function() {
        var colModel   = this.cm,
            templates  = this.templates,
            headerTpl  = templates.hcell,
            properties = {},
            colCount   = colModel.getColumnCount(),
            last       = colCount - 1,
            cells      = [],
            i, cssCls;
        
        for (i = 0; i < colCount; i++) {
            if (i == 0) {
                cssCls = 'x-grid3-cell-first ';
            } else {
                cssCls = i == last ? 'x-grid3-cell-last ' : '';
            }
            
            properties = {
                id     : colModel.getColumnId(i),
                value  : colModel.getColumnHeader(i) || '',
                style  : this.getColumnStyle(i, true),
                css    : cssCls,
                tooltip: this.getColumnTooltip(i)
            };
            
            if (colModel.config[i].align == 'right') {
                properties.istyle = 'padding-right: 16px;';
            } else {
                delete properties.istyle;
            }
            
            cells[i] = headerTpl.apply(properties);
        }
        
        return templates.header.apply({
            cells : cells.join(""),
            tstyle: String.format("width: {0};", this.getTotalWidth())
        });
    },

    /**
     * @private
     */
    getColumnTooltip : function(i) {
        var tooltip = this.cm.getColumnTooltip(i);
        if (tooltip) {
            if (Ext.QuickTips.isEnabled()) {
                return 'ext:qtip="' + tooltip + '"';
            } else {
                return 'title="' + tooltip + '"';
            }
        }
        
        return '';
    },

    // private
    beforeUpdate : function() {
        this.grid.stopEditing(true);
    },

    /**
     * @private
     * Re-renders the headers and ensures they are sized correctly
     */
    updateHeaders : function() {
        this.innerHd.firstChild.innerHTML = this.renderHeaders();
        
        this.updateHeaderWidth(false);
    },
    
    /**
     * @private
     * Ensures that the header is sized to the total width available to it
     * @param {Boolean} updateMain True to update the mainBody's width also (defaults to true)
     */
    updateHeaderWidth: function(updateMain) {
        var innerHdChild = this.innerHd.firstChild,
            totalWidth   = this.getTotalWidth();
        
        innerHdChild.style.width = this.getOffsetWidth();
        innerHdChild.firstChild.style.width = totalWidth;
        
        if (updateMain !== false) {
            this.mainBody.dom.style.width = totalWidth;
        }
    },

    /**
     * Focuses the specified row.
     * @param {Number} row The row index
     */
    focusRow : function(row) {
        this.focusCell(row, 0, false);
    },

    /**
     * Focuses the specified cell.
     * @param {Number} row The row index
     * @param {Number} col The column index
     */
    focusCell : function(row, col, hscroll) {
        this.syncFocusEl(this.ensureVisible(row, col, hscroll));
        
        var focusEl = this.focusEl;
        
        if (Ext.isGecko) {
            focusEl.focus();
        } else {
            focusEl.focus.defer(1, focusEl);
        }
    },

    /**
     * @private
     * Finds the Elements corresponding to the given row and column indexes
     */
    resolveCell : function(row, col, hscroll) {
        if (!Ext.isNumber(row)) {
            row = row.rowIndex;
        }
        
        if (!this.ds) {
            return null;
        }
        
        if (row < 0 || row >= this.ds.getCount()) {
            return null;
        }
        col = (col !== undefined ? col : 0);

        var rowEl    = this.getRow(row),
            colModel = this.cm,
            colCount = colModel.getColumnCount(),
            cellEl;
            
        if (!(hscroll === false && col === 0)) {
            while (col < colCount && colModel.isHidden(col)) {
                col++;
            }
            
            cellEl = this.getCell(row, col);
        }

        return {row: rowEl, cell: cellEl};
    },

    /**
     * @private
     * Returns the XY co-ordinates of a given row/cell resolution (see {@link #resolveCell})
     * @return {Array} X and Y coords
     */
    getResolvedXY : function(resolved) {
        if (!resolved) {
            return null;
        }
        
        var cell = resolved.cell,
            row  = resolved.row;
        
        if (cell) {
            return Ext.fly(cell).getXY();
        } else {
            return [this.el.getX(), Ext.fly(row).getY()];
        }
    },

    /**
     * @private
     * Moves the focus element to the x and y co-ordinates of the given row and column
     */
    syncFocusEl : function(row, col, hscroll) {
        var xy = row;
        
        if (!Ext.isArray(xy)) {
            row = Math.min(row, Math.max(0, this.getRows().length-1));
            
            if (isNaN(row)) {
                return;
            }
            
            xy = this.getResolvedXY(this.resolveCell(row, col, hscroll));
        }
        
        this.focusEl.setXY(xy || this.scroller.getXY());
    },

    /**
     * @private
     */
    ensureVisible : function(row, col, hscroll) {
        var resolved = this.resolveCell(row, col, hscroll);
        
        if (!resolved || !resolved.row) {
            return null;
        }

        var rowEl  = resolved.row,
            cellEl = resolved.cell,
            c = this.scroller.dom,
            p = rowEl,
            ctop = 0,
            stop = this.el.dom;

        while (p && p != stop) {
            ctop += p.offsetTop;
            p = p.offsetParent;
        }

        ctop -= this.mainHd.dom.offsetHeight;
        stop = parseInt(c.scrollTop, 10);

        var cbot = ctop + rowEl.offsetHeight,
            ch = c.clientHeight,
            sbot = stop + ch;


        if (ctop < stop) {
          c.scrollTop = ctop;
        } else if(cbot > sbot) {
            c.scrollTop = cbot-ch;
        }

        if (hscroll !== false) {
            var cleft  = parseInt(cellEl.offsetLeft, 10),
                cright = cleft + cellEl.offsetWidth,
                sleft  = parseInt(c.scrollLeft, 10),
                sright = sleft + c.clientWidth;
                
            if (cleft < sleft) {
                c.scrollLeft = cleft;
            } else if(cright > sright) {
                c.scrollLeft = cright-c.clientWidth;
            }
        }
        
        return this.getResolvedXY(resolved);
    },

    // private
    insertRows : function(dm, firstRow, lastRow, isUpdate) {
        var last = dm.getCount() - 1;
        if( !isUpdate && firstRow === 0 && lastRow >= last) {
            this.fireEvent('beforerowsinserted', this, firstRow, lastRow);
                this.refresh();
            this.fireEvent('rowsinserted', this, firstRow, lastRow);
        } else {
            if (!isUpdate) {
                this.fireEvent('beforerowsinserted', this, firstRow, lastRow);
            }
            var html = this.renderRows(firstRow, lastRow),
                before = this.getRow(firstRow);
            if (before) {
                if(firstRow === 0){
                    Ext.fly(this.getRow(0)).removeClass(this.firstRowCls);
                }
                Ext.DomHelper.insertHtml('beforeBegin', before, html);
            } else {
                var r = this.getRow(last - 1);
                if(r){
                    Ext.fly(r).removeClass(this.lastRowCls);
                }
                Ext.DomHelper.insertHtml('beforeEnd', this.mainBody.dom, html);
            }
            if (!isUpdate) {
                this.processRows(firstRow);
                this.fireEvent('rowsinserted', this, firstRow, lastRow);
            } else if (firstRow === 0 || firstRow >= last) {
                //ensure first/last row is kept after an update.
                Ext.fly(this.getRow(firstRow)).addClass(firstRow === 0 ? this.firstRowCls : this.lastRowCls);
            }
        }
        this.syncFocusEl(firstRow);
    },

    /**
     * @private
     * DEPRECATED - this doesn't appear to be called anywhere in the library, remove in 4.0. 
     */
    deleteRows : function(dm, firstRow, lastRow) {
        if (dm.getRowCount() < 1) {
            this.refresh();
        } else {
            this.fireEvent('beforerowsdeleted', this, firstRow, lastRow);

            this.removeRows(firstRow, lastRow);

            this.processRows(firstRow);
            this.fireEvent('rowsdeleted', this, firstRow, lastRow);
        }
    },

    /**
     * @private
     * Builds a CSS string for the given column index
     * @param {Number} colIndex The column index
     * @param {Boolean} isHeader True if getting the style for the column's header
     * @return {String} The CSS string
     */
    getColumnStyle : function(colIndex, isHeader) {
        var colModel  = this.cm,
            colConfig = colModel.config,
            style     = isHeader ? '' : colConfig[colIndex].css || '',
            align     = colConfig[colIndex].align;
        
        style += String.format("width: {0};", this.getColumnWidth(colIndex));
        
        if (colModel.isHidden(colIndex)) {
            style += 'display: none; ';
        }
        
        if (align) {
            style += String.format("text-align: {0};", align);
        }
        
        return style;
    },

    /**
     * @private
     * Returns the width of a given column minus its border width
     * @return {Number} The column index
     * @return {String|Number} The width in pixels
     */
    getColumnWidth : function(column) {
        var columnWidth = this.cm.getColumnWidth(column),
            borderWidth = this.borderWidth;
        
        if (Ext.isNumber(columnWidth)) {
            if (Ext.isBorderBox) {
                return columnWidth + "px";
            } else {
                return Math.max(columnWidth - borderWidth, 0) + "px";
            }
        } else {
            return columnWidth;
        }
    },

    /**
     * @private
     * Returns the total width of all visible columns
     * @return {String} 
     */
    getTotalWidth : function() {
        return this.cm.getTotalWidth() + 'px';
    },

    /**
     * @private
     * Resizes each column to fit the available grid width.
     * TODO: The second argument isn't even used, remove it in 4.0
     * @param {Boolean} preventRefresh True to prevent resizing of each row to the new column sizes (defaults to false)
     * @param {null} onlyExpand NOT USED, will be removed in 4.0
     * @param {Number} omitColumn The index of a column to leave at its current width. Defaults to undefined
     * @return {Boolean} True if the operation succeeded, false if not or undefined if the grid view is not yet initialized
     */
    fitColumns : function(preventRefresh, onlyExpand, omitColumn) {
        var grid          = this.grid,
            colModel      = this.cm,
            totalColWidth = colModel.getTotalWidth(false),
            gridWidth     = this.getGridInnerWidth(),
            extraWidth    = gridWidth - totalColWidth,
            columns       = [],
            extraCol      = 0,
            width         = 0,
            colWidth, fraction, i;
        
        // not initialized, so don't screw up the default widths
        if (gridWidth < 20 || extraWidth === 0) {
            return false;
        }
        
        var visibleColCount = colModel.getColumnCount(true),
            totalColCount   = colModel.getColumnCount(false),
            adjCount        = visibleColCount - (Ext.isNumber(omitColumn) ? 1 : 0);
        
        if (adjCount === 0) {
            adjCount = 1;
            omitColumn = undefined;
        }
        
        //FIXME: the algorithm used here is odd and potentially confusing. Includes this for loop and the while after it.
        for (i = 0; i < totalColCount; i++) {
            if (!colModel.isFixed(i) && i !== omitColumn) {
                colWidth = colModel.getColumnWidth(i);
                columns.push(i, colWidth);
                
                if (!colModel.isHidden(i)) {
                    extraCol = i;
                    width += colWidth;
                }
            }
        }
        
        fraction = (gridWidth - colModel.getTotalWidth()) / width;
        
        while (columns.length) {
            colWidth = columns.pop();
            i        = columns.pop();
            
            colModel.setColumnWidth(i, Math.max(grid.minColumnWidth, Math.floor(colWidth + colWidth * fraction)), true);
        }
        
        //this has been changed above so remeasure now
        totalColWidth = colModel.getTotalWidth(false);
        
        if (totalColWidth > gridWidth) {
            var adjustCol = (adjCount == visibleColCount) ? extraCol : omitColumn,
                newWidth  = Math.max(1, colModel.getColumnWidth(adjustCol) - (totalColWidth - gridWidth));
            
            colModel.setColumnWidth(adjustCol, newWidth, true);
        }
        
        if (preventRefresh !== true) {
            this.updateAllColumnWidths();
        }
        
        return true;
    },

    /**
     * @private
     * Resizes the configured autoExpandColumn to take the available width after the other columns have 
     * been accounted for
     * @param {Boolean} preventUpdate True to prevent the resizing of all rows (defaults to false)
     */
    autoExpand : function(preventUpdate) {
        var grid             = this.grid,
            colModel         = this.cm,
            gridWidth        = this.getGridInnerWidth(),
            totalColumnWidth = colModel.getTotalWidth(false),
            autoExpandColumn = grid.autoExpandColumn;
        
        if (!this.userResized && autoExpandColumn) {
            if (gridWidth != totalColumnWidth) {
                //if we are not already using all available width, resize the autoExpandColumn
                var colIndex     = colModel.getIndexById(autoExpandColumn),
                    currentWidth = colModel.getColumnWidth(colIndex),
                    desiredWidth = gridWidth - totalColumnWidth + currentWidth,
                    newWidth     = Math.min(Math.max(desiredWidth, grid.autoExpandMin), grid.autoExpandMax);
                
                if (currentWidth != newWidth) {
                    colModel.setColumnWidth(colIndex, newWidth, true);
                    
                    if (preventUpdate !== true) {
                        this.updateColumnWidth(colIndex, newWidth);
                    }
                }
            }
        }
    },
    
    /**
     * Returns the total internal width available to the grid, taking the scrollbar into account
     * @return {Number} The total width
     */
    getGridInnerWidth: function() {
        return this.grid.getGridEl().getWidth(true) - this.getScrollOffset();
    },

    /**
     * @private
     * Returns an array of column configurations - one for each column
     * @return {Array} Array of column config objects. This includes the column name, renderer, id style and renderer
     */
    getColumnData : function() {
        var columns  = [],
            colModel = this.cm,
            colCount = colModel.getColumnCount(),
            fields   = this.ds.fields,
            i, name;
        
        for (i = 0; i < colCount; i++) {
            name = colModel.getDataIndex(i);
            
            columns[i] = {
                name    : Ext.isDefined(name) ? name : (fields.get(i) ? fields.get(i).name : undefined),
                renderer: colModel.getRenderer(i),
                scope   : colModel.getRendererScope(i),
                id      : colModel.getColumnId(i),
                style   : this.getColumnStyle(i)
            };
        }
        
        return columns;
    },

    /**
     * @private
     * Renders rows between start and end indexes
     * @param {Number} startRow Index of the first row to render
     * @param {Number} endRow Index of the last row to render
     */
    renderRows : function(startRow, endRow) {
        var grid     = this.grid,
            store    = grid.store,
            stripe   = grid.stripeRows,
            colModel = grid.colModel,
            colCount = colModel.getColumnCount(),
            rowCount = store.getCount(),
            records;
        
        if (rowCount < 1) {
            return '';
        }
        
        startRow = startRow || 0;
        endRow   = Ext.isDefined(endRow) ? endRow : rowCount - 1;
        records  = store.getRange(startRow, endRow);
        
        return this.doRender(this.getColumnData(), records, store, startRow, colCount, stripe);
    },

    // private
    renderBody : function(){
        var markup = this.renderRows() || '&#160;';
        return this.templates.body.apply({rows: markup});
    },

    /**
     * @private
     * Refreshes a row by re-rendering it. Fires the rowupdated event when done
     */
    refreshRow: function(record) {
        var store     = this.ds,
            colCount  = this.cm.getColumnCount(),
            columns   = this.getColumnData(),
            last      = colCount - 1,
            cls       = ['x-grid3-row'],
            rowParams = {
                tstyle: String.format("width: {0};", this.getTotalWidth())
            },
            colBuffer = [],
            cellTpl   = this.templates.cell,
            rowIndex, row, column, meta, css, i;
        
        if (Ext.isNumber(record)) {
            rowIndex = record;
            record   = store.getAt(rowIndex);
        } else {
            rowIndex = store.indexOf(record);
        }
        
        //the record could not be found
        if (!record || rowIndex < 0) {
            return;
        }
        
        //builds each column in this row
        for (i = 0; i < colCount; i++) {
            column = columns[i];
            
            if (i == 0) {
                css = 'x-grid3-cell-first';
            } else {
                css = (i == last) ? 'x-grid3-cell-last ' : '';
            }
            
            meta = {
                id      : column.id,
                style   : column.style,
                css     : css,
                attr    : "",
                cellAttr: ""
            };
            // Need to set this after, because we pass meta to the renderer
            meta.value = column.renderer.call(column.scope, record.data[column.name], meta, record, rowIndex, i, store);
            
            if (Ext.isEmpty(meta.value)) {
                meta.value = '&#160;';
            }
            
            if (this.markDirty && record.dirty && typeof record.modified[column.name] != 'undefined') {
                meta.css += ' x-grid3-dirty-cell';
            }
            
            colBuffer[i] = cellTpl.apply(meta);
        }
        
        row = this.getRow(rowIndex);
        row.className = '';
        
        if (this.grid.stripeRows && ((rowIndex + 1) % 2 === 0)) {
            cls.push('x-grid3-row-alt');
        }
        
        if (this.getRowClass) {
            rowParams.cols = colCount;
            cls.push(this.getRowClass(record, rowIndex, rowParams, store));
        }
        
        this.fly(row).addClass(cls).setStyle(rowParams.tstyle);
        rowParams.cells = colBuffer.join("");
        row.innerHTML = this.templates.rowInner.apply(rowParams);
        
        this.fireEvent('rowupdated', this, rowIndex, record);
    },

    /**
     * Refreshs the grid UI
     * @param {Boolean} headersToo (optional) True to also refresh the headers
     */
    refresh : function(headersToo) {
        this.fireEvent('beforerefresh', this);
        this.grid.stopEditing(true);

        var result = this.renderBody();
        this.mainBody.update(result).setWidth(this.getTotalWidth());
        if (headersToo === true) {
            this.updateHeaders();
            this.updateHeaderSortState();
        }
        this.processRows(0, true);
        this.layout();
        this.applyEmptyText();
        this.fireEvent('refresh', this);
    },

    /**
     * @private
     * Displays the configured emptyText if there are currently no rows to display
     */
    applyEmptyText : function() {
        if (this.emptyText && !this.hasRows()) {
            this.mainBody.update('<div class="x-grid-empty">' + this.emptyText + '</div>');
        }
    },

    /**
     * @private
     * Adds sorting classes to the column headers based on the bound store's sortInfo. Fires the 'sortchange' event
     * if the sorting has changed since this function was last run.
     */
    updateHeaderSortState : function() {
        var state = this.ds.getSortState();
        if (!state) {
            return;
        }

        if (!this.sortState || (this.sortState.field != state.field || this.sortState.direction != state.direction)) {
            this.grid.fireEvent('sortchange', this.grid, state);
        }

        this.sortState = state;

        var sortColumn = this.cm.findColumnIndex(state.field);
        if (sortColumn != -1) {
            var sortDir = state.direction;
            this.updateSortIcon(sortColumn, sortDir);
        }
    },

    /**
     * @private
     * Removes any sorting indicator classes from the column headers
     */
    clearHeaderSortState : function() {
        if (!this.sortState) {
            return;
        }
        this.grid.fireEvent('sortchange', this.grid, null);
        this.mainHd.select('td').removeClass(this.sortClasses);
        delete this.sortState;
    },

    /**
     * @private
     * Destroys all objects associated with the GridView
     */
    destroy : function() {
        var me              = this,
            grid            = me.grid,
            gridEl          = grid.getGridEl(),
            dragZone        = me.dragZone,
            splitZone       = me.splitZone,
            columnDrag      = me.columnDrag,
            columnDrop      = me.columnDrop,
            scrollToTopTask = me.scrollToTopTask,
            columnDragData,
            columnDragProxy;
        
        if (scrollToTopTask && scrollToTopTask.cancel) {
            scrollToTopTask.cancel();
        }
        
        Ext.destroyMembers(me, 'colMenu', 'hmenu');

        me.initData(null, null);
        me.purgeListeners();
        
        Ext.fly(me.innerHd).un("click", me.handleHdDown, me);

        if (grid.enableColumnMove) {
            columnDragData = columnDrag.dragData;
            columnDragProxy = columnDrag.proxy;
            Ext.destroy(
                columnDrag.el,
                columnDragProxy.ghost,
                columnDragProxy.el,
                columnDrop.el,
                columnDrop.proxyTop,
                columnDrop.proxyBottom,
                columnDragData.ddel,
                columnDragData.header
            );
            
            if (columnDragProxy.anim) {
                Ext.destroy(columnDragProxy.anim);
            }
            
            delete columnDragProxy.ghost;
            delete columnDragData.ddel;
            delete columnDragData.header;
            columnDrag.destroy();
            
            delete Ext.dd.DDM.locationCache[columnDrag.id];
            delete columnDrag._domRef;

            delete columnDrop.proxyTop;
            delete columnDrop.proxyBottom;
            columnDrop.destroy();
            delete Ext.dd.DDM.locationCache["gridHeader" + gridEl.id];
            delete columnDrop._domRef;
            delete Ext.dd.DDM.ids[columnDrop.ddGroup];
        }

        if (splitZone) { // enableColumnResize
            splitZone.destroy();
            delete splitZone._domRef;
            delete Ext.dd.DDM.ids["gridSplitters" + gridEl.id];
        }

        Ext.fly(me.innerHd).removeAllListeners();
        Ext.removeNode(me.innerHd);
        delete me.innerHd;

        Ext.destroy(
            me.el,
            me.mainWrap,
            me.mainHd,
            me.scroller,
            me.mainBody,
            me.focusEl,
            me.resizeMarker,
            me.resizeProxy,
            me.activeHdBtn,
            me._flyweight,
            dragZone,
            splitZone
        );

        delete grid.container;

        if (dragZone) {
            dragZone.destroy();
        }

        Ext.dd.DDM.currentTarget = null;
        delete Ext.dd.DDM.locationCache[gridEl.id];

        Ext.EventManager.removeResizeListener(me.onWindowResize, me);
    },

    // private
    onDenyColumnHide : function() {

    },

    // private
    render : function() {
        if (this.autoFill) {
            var ct = this.grid.ownerCt;
            
            if (ct && ct.getLayout()) {
                ct.on('afterlayout', function() {
                    this.fitColumns(true, true);
                    this.updateHeaders();
                    this.updateHeaderSortState();
                }, this, {single: true});
            }
        } else if (this.forceFit) {
            this.fitColumns(true, false);
        } else if (this.grid.autoExpandColumn) {
            this.autoExpand(true);
        }
        
        this.grid.getGridEl().dom.innerHTML = this.renderUI();
        
        this.afterRenderUI();
    },

    /* --------------------------------- Model Events and Handlers --------------------------------*/
    
    /**
     * @private
     * Binds a new Store and ColumnModel to this GridView. Removes any listeners from the old objects (if present)
     * and adds listeners to the new ones
     * @param {Ext.data.Store} newStore The new Store instance
     * @param {Ext.grid.ColumnModel} newColModel The new ColumnModel instance
     */
    initData : function(newStore, newColModel) {
        var me = this;
        
        if (me.ds) {
            var oldStore = me.ds;
            
            oldStore.un('add', me.onAdd, me);
            oldStore.un('load', me.onLoad, me);
            oldStore.un('clear', me.onClear, me);
            oldStore.un('remove', me.onRemove, me);
            oldStore.un('update', me.onUpdate, me);
            oldStore.un('datachanged', me.onDataChange, me);
            
            if (oldStore !== newStore && oldStore.autoDestroy) {
                oldStore.destroy();
            }
        }
        
        if (newStore) {
            newStore.on({
                scope      : me,
                load       : me.onLoad,
                add        : me.onAdd,
                remove     : me.onRemove,
                update     : me.onUpdate,
                clear      : me.onClear,
                datachanged: me.onDataChange
            });
        }
        
        if (me.cm) {
            var oldColModel = me.cm;
            
            oldColModel.un('configchange', me.onColConfigChange, me);
            oldColModel.un('widthchange',  me.onColWidthChange, me);
            oldColModel.un('headerchange', me.onHeaderChange, me);
            oldColModel.un('hiddenchange', me.onHiddenChange, me);
            oldColModel.un('columnmoved',  me.onColumnMove, me);
        }
        
        if (newColModel) {
            delete me.lastViewWidth;
            
            newColModel.on({
                scope       : me,
                configchange: me.onColConfigChange,
                widthchange : me.onColWidthChange,
                headerchange: me.onHeaderChange,
                hiddenchange: me.onHiddenChange,
                columnmoved : me.onColumnMove
            });
        }
        
        me.ds = newStore;
        me.cm = newColModel;
    },

    // private
    onDataChange : function(){
        this.refresh(true);
        this.updateHeaderSortState();
        this.syncFocusEl(0);
    },

    // private
    onClear : function() {
        this.refresh();
        this.syncFocusEl(0);
    },

    // private
    onUpdate : function(store, record) {
        this.refreshRow(record);
    },

    // private
    onAdd : function(store, records, index) {
        this.insertRows(store, index, index + (records.length-1));
    },

    // private
    onRemove : function(store, record, index, isUpdate) {
        if (isUpdate !== true) {
            this.fireEvent('beforerowremoved', this, index, record);
        }
        
        this.removeRow(index);
        
        if (isUpdate !== true) {
            this.processRows(index);
            this.applyEmptyText();
            this.fireEvent('rowremoved', this, index, record);
        }
    },

    /**
     * @private
     * Called when a store is loaded, scrolls to the top row
     */
    onLoad : function() {
        if (Ext.isGecko) {
            if (!this.scrollToTopTask) {
                this.scrollToTopTask = new Ext.util.DelayedTask(this.scrollToTop, this);
            }
            this.scrollToTopTask.delay(1);
        } else {
            this.scrollToTop();
        }
    },

    // private
    onColWidthChange : function(cm, col, width) {
        this.updateColumnWidth(col, width);
    },

    // private
    onHeaderChange : function(cm, col, text) {
        this.updateHeaders();
    },

    // private
    onHiddenChange : function(cm, col, hidden) {
        this.updateColumnHidden(col, hidden);
    },

    // private
    onColumnMove : function(cm, oldIndex, newIndex) {
        this.indexMap = null;
        this.refresh(true);
        this.restoreScroll(this.getScrollState());
        
        this.afterMove(newIndex);
        this.grid.fireEvent('columnmove', oldIndex, newIndex);
    },

    // private
    onColConfigChange : function() {
        delete this.lastViewWidth;
        this.indexMap = null;
        this.refresh(true);
    },

    /* -------------------- UI Events and Handlers ------------------------------ */
    // private
    initUI : function(grid) {
        grid.on('headerclick', this.onHeaderClick, this);
    },

    // private
    initEvents : Ext.emptyFn,

    // private
    onHeaderClick : function(g, index) {
        if (this.headersDisabled || !this.cm.isSortable(index)) {
            return;
        }
        g.stopEditing(true);
        g.store.sort(this.cm.getDataIndex(index));
    },

    /**
     * @private
     * Adds the hover class to a row when hovered over
     */
    onRowOver : function(e, target) {
        var row = this.findRowIndex(target);
        
        if (row !== false) {
            this.addRowClass(row, this.rowOverCls);
        }
    },

    /**
     * @private
     * Removes the hover class from a row on mouseout
     */
    onRowOut : function(e, target) {
        var row = this.findRowIndex(target);
        
        if (row !== false && !e.within(this.getRow(row), true)) {
            this.removeRowClass(row, this.rowOverCls);
        }
    },

    // private
    onRowSelect : function(row) {
        this.addRowClass(row, this.selectedRowClass);
    },

    // private
    onRowDeselect : function(row) {
        this.removeRowClass(row, this.selectedRowClass);
    },

    // private
    onCellSelect : function(row, col) {
        var cell = this.getCell(row, col);
        if (cell) {
            this.fly(cell).addClass('x-grid3-cell-selected');
        }
    },

    // private
    onCellDeselect : function(row, col) {
        var cell = this.getCell(row, col);
        if (cell) {
            this.fly(cell).removeClass('x-grid3-cell-selected');
        }
    },

    // private
    handleWheel : function(e) {
        e.stopPropagation();
    },

    /**
     * @private
     * Called by the SplitDragZone when a drag has been completed. Resizes the columns
     */
    onColumnSplitterMoved : function(cellIndex, width) {
        this.userResized = true;
        this.grid.colModel.setColumnWidth(cellIndex, width, true);

        if (this.forceFit) {
            this.fitColumns(true, false, cellIndex);
            this.updateAllColumnWidths();
        } else {
            this.updateColumnWidth(cellIndex, width);
            this.syncHeaderScroll();
        }

        this.grid.fireEvent('columnresize', cellIndex, width);
    },

    /**
     * @private
     * Click handler for the shared column dropdown menu, called on beforeshow. Builds the menu
     * which displays the list of columns for the user to show or hide.
     */
    beforeColMenuShow : function() {
        var colModel = this.cm,
            colCount = colModel.getColumnCount(),
            colMenu  = this.colMenu,
            i;

        colMenu.removeAll();

        for (i = 0; i < colCount; i++) {
            if (colModel.config[i].hideable !== false) {
                colMenu.add(new Ext.menu.CheckItem({
                    text       : colModel.getColumnHeader(i),
                    itemId     : 'col-' + colModel.getColumnId(i),
                    checked    : !colModel.isHidden(i),
                    disabled   : colModel.config[i].hideable === false,
                    hideOnClick: false
                }));
            }
        }
    },
    
    /**
     * @private
     * Attached as the 'itemclick' handler to the header menu and the column show/hide submenu (if available).
     * Performs sorting if the sorter buttons were clicked, otherwise hides/shows the column that was clicked.
     */
    handleHdMenuClick : function(item) {
        var store     = this.ds,
            dataIndex = this.cm.getDataIndex(this.hdCtxIndex);

        switch (item.getItemId()) {
            case 'asc':
                store.sort(dataIndex, 'ASC');
                break;
            case 'desc':
                store.sort(dataIndex, 'DESC');
                break;
            default:
                this.handleHdMenuClickDefault(item);
        }
        return true;
    },
    
    /**
     * Called by handleHdMenuClick if any button except a sort ASC/DESC button was clicked. The default implementation provides
     * the column hide/show functionality based on the check state of the menu item. A different implementation can be provided
     * if needed.
     * @param {Ext.menu.BaseItem} item The menu item that was clicked
     */
    handleHdMenuClickDefault: function(item) {
        var colModel = this.cm,
            itemId   = item.getItemId(),
            index    = colModel.getIndexById(itemId.substr(4));

        if (index != -1) {
            if (item.checked && colModel.getColumnsBy(this.isHideableColumn, this).length <= 1) {
                this.onDenyColumnHide();
                return;
            }
            colModel.setHidden(index, item.checked);
        }
    },

    /**
     * @private
     * Called when a header cell is clicked - shows the menu if the click happened over a trigger button
     */
    handleHdDown : function(e, target) {
        if (Ext.fly(target).hasClass('x-grid3-hd-btn')) {
            e.stopEvent();
            
            var colModel  = this.cm,
                header    = this.findHeaderCell(target),
                index     = this.getCellIndex(header),
                sortable  = colModel.isSortable(index),
                menu      = this.hmenu,
                menuItems = menu.items,
                menuCls   = this.headerMenuOpenCls,
                sep;
            
            this.hdCtxIndex = index;
            
            Ext.fly(header).addClass(menuCls);
            if (this.hideSortIcons) {
                menuItems.get('asc').setVisible(sortable);
                menuItems.get('desc').setVisible(sortable);
                sep = menuItems.get('sortSep');
                if (sep) {
                    sep.setVisible(sortable);    
                }
            } else {
                menuItems.get('asc').setDisabled(!sortable);
                menuItems.get('desc').setDisabled(!sortable);
            }
            
            menu.on('hide', function() {
                Ext.fly(header).removeClass(menuCls);
            }, this, {single:true});
            
            menu.show(target, 'tl-bl?');
        }
    },

    /**
     * @private
     * Attached to the headers' mousemove event. This figures out the CSS cursor to use based on where the mouse is currently
     * pointed. If the mouse is currently hovered over the extreme left or extreme right of any header cell and the cell next 
     * to it is resizable it is given the resize cursor, otherwise the cursor is set to an empty string.
     */
    handleHdMove : function(e) {
        var header = this.findHeaderCell(this.activeHdRef);
        
        if (header && !this.headersDisabled) {
            var handleWidth  = this.splitHandleWidth || 5,
                activeRegion = this.activeHdRegion,
                headerStyle  = header.style,
                colModel     = this.cm,
                cursor       = '',
                pageX        = e.getPageX();
                
            if (this.grid.enableColumnResize !== false) {
                var activeHeaderIndex = this.activeHdIndex,
                    previousVisible   = this.getPreviousVisible(activeHeaderIndex),
                    currentResizable  = colModel.isResizable(activeHeaderIndex),
                    previousResizable = previousVisible && colModel.isResizable(previousVisible),
                    inLeftResizer     = pageX - activeRegion.left <= handleWidth,
                    inRightResizer    = activeRegion.right - pageX <= (!this.activeHdBtn ? handleWidth : 2);
                
                if (inLeftResizer && previousResizable) {
                    cursor = Ext.isAir ? 'move' : Ext.isWebKit ? 'e-resize' : 'col-resize'; // col-resize not always supported
                } else if (inRightResizer && currentResizable) {
                    cursor = Ext.isAir ? 'move' : Ext.isWebKit ? 'w-resize' : 'col-resize';
                }
            }
            
            headerStyle.cursor = cursor;
        }
    },
    
    /**
     * @private
     * Returns the index of the nearest currently visible header to the left of the given index.
     * @param {Number} index The header index
     * @return {Number/undefined} The index of the nearest visible header
     */
    getPreviousVisible: function(index) {
        while (index > 0) {
            if (!this.cm.isHidden(index - 1)) {
                return index;
            }
            index--;
        }
        return undefined;
    },

    /**
     * @private
     * Tied to the header element's mouseover event - adds the over class to the header cell if the menu is not disabled
     * for that cell
     */
    handleHdOver : function(e, target) {
        var header = this.findHeaderCell(target);
        
        if (header && !this.headersDisabled) {
            var fly = this.fly(header);
            
            this.activeHdRef = target;
            this.activeHdIndex = this.getCellIndex(header);
            this.activeHdRegion = fly.getRegion();
            
            if (!this.isMenuDisabled(this.activeHdIndex, fly)) {
                fly.addClass('x-grid3-hd-over');
                this.activeHdBtn = fly.child('.x-grid3-hd-btn');
                
                if (this.activeHdBtn) {
                    this.activeHdBtn.dom.style.height = (header.firstChild.offsetHeight - 1) + 'px';
                }
            }
        }
    },

    /**
     * @private
     * Tied to the header element's mouseout event. Removes the hover class from the header cell
     */
    handleHdOut : function(e, target) {
        var header = this.findHeaderCell(target);
        
        if (header && (!Ext.isIE9m || !e.within(header, true))) {
            this.activeHdRef = null;
            this.fly(header).removeClass('x-grid3-hd-over');
            header.style.cursor = '';
        }
    },
    
    /**
     * @private
     * Used by {@link #handleHdOver} to determine whether or not to show the header menu class on cell hover
     * @param {Number} cellIndex The header cell index
     * @param {Ext.Element} el The cell element currently being hovered over
     */
    isMenuDisabled: function(cellIndex, el) {
        return this.cm.isMenuDisabled(cellIndex);
    },

    /**
     * @private
     * Returns true if there are any rows rendered into the GridView
     * @return {Boolean} True if any rows have been rendered
     */
    hasRows : function() {
        var fc = this.mainBody.dom.firstChild;
        return fc && fc.nodeType == 1 && fc.className != 'x-grid-empty';
    },
    
    /**
     * @private
     */
    isHideableColumn : function(c) {
        return !c.hidden;
    },

    /**
     * @private
     * DEPRECATED - will be removed in Ext JS 5.0
     */
    bind : function(d, c) {
        this.initData(d, c);
    }
});


// private
// This is a support class used internally by the Grid components
Ext.grid.GridView.SplitDragZone = Ext.extend(Ext.dd.DDProxy, {

    constructor: function(grid, hd){
        this.grid = grid;
        this.view = grid.getView();
        this.marker = this.view.resizeMarker;
        this.proxy = this.view.resizeProxy;
        Ext.grid.GridView.SplitDragZone.superclass.constructor.call(this, hd,
            'gridSplitters' + this.grid.getGridEl().id, {
            dragElId : Ext.id(this.proxy.dom), resizeFrame:false
        });
        this.scroll = false;
        this.hw = this.view.splitHandleWidth || 5;
    },

    b4StartDrag : function(x, y){
        this.dragHeadersDisabled = this.view.headersDisabled;
        this.view.headersDisabled = true;
        var h = this.view.mainWrap.getHeight();
        this.marker.setHeight(h);
        this.marker.show();
        this.marker.alignTo(this.view.getHeaderCell(this.cellIndex), 'tl-tl', [-2, 0]);
        this.proxy.setHeight(h);
        var w = this.cm.getColumnWidth(this.cellIndex),
            minw = Math.max(w-this.grid.minColumnWidth, 0);
        this.resetConstraints();
        this.setXConstraint(minw, 1000);
        this.setYConstraint(0, 0);
        this.minX = x - minw;
        this.maxX = x + 1000;
        this.startPos = x;
        Ext.dd.DDProxy.prototype.b4StartDrag.call(this, x, y);
    },

    allowHeaderDrag : function(e){
        return true;
    },

    handleMouseDown : function(e){
        var t = this.view.findHeaderCell(e.getTarget());
        if(t && this.allowHeaderDrag(e)){
            var xy = this.view.fly(t).getXY(), 
                x = xy[0],
                exy = e.getXY(), 
                ex = exy[0],
                w = t.offsetWidth, 
                adjust = false;
                
            if((ex - x) <= this.hw){
                adjust = -1;
            }else if((x+w) - ex <= this.hw){
                adjust = 0;
            }
            if(adjust !== false){
                this.cm = this.grid.colModel;
                var ci = this.view.getCellIndex(t);
                if(adjust == -1){
                  if (ci + adjust < 0) {
                    return;
                  }
                    while(this.cm.isHidden(ci+adjust)){
                        --adjust;
                        if(ci+adjust < 0){
                            return;
                        }
                    }
                }
                this.cellIndex = ci+adjust;
                this.split = t.dom;
                if(this.cm.isResizable(this.cellIndex) && !this.cm.isFixed(this.cellIndex)){
                    Ext.grid.GridView.SplitDragZone.superclass.handleMouseDown.apply(this, arguments);
                }
            }else if(this.view.columnDrag){
                this.view.columnDrag.callHandleMouseDown(e);
            }
        }
    },

    endDrag : function(e){
        this.marker.hide();
        var v = this.view,
            endX = Math.max(this.minX, e.getPageX()),
            diff = endX - this.startPos,
            disabled = this.dragHeadersDisabled;
            
        v.onColumnSplitterMoved(this.cellIndex, this.cm.getColumnWidth(this.cellIndex)+diff);
        setTimeout(function(){
            v.headersDisabled = disabled;
        }, 50);
    },

    autoOffset : function(){
        this.setDelta(0,0);
    }
});
/**
 * @class Ext.grid.PivotGridView
 * @extends Ext.grid.GridView
 * Specialised GridView for rendering Pivot Grid components. Config can be passed to the PivotGridView via the PivotGrid constructor's
 * viewConfig option:
<pre><code>
new Ext.grid.PivotGrid({
    viewConfig: {
        title: 'My Pivot Grid',
        getCellCls: function(value) {
            return value > 10 'red' : 'green';
        }
    }
});
</code></pre>
 * <p>Currently {@link #title} and {@link #getCellCls} are the only configuration options accepted by PivotGridView. All other 
 * interaction is performed via the {@link Ext.grid.PivotGrid PivotGrid} class.</p>
 */
Ext.grid.PivotGridView = Ext.extend(Ext.grid.GridView, {
    
    /**
     * The CSS class added to all group header cells. Defaults to 'grid-hd-group-cell'
     * @property colHeaderCellCls
     * @type String
     */
    colHeaderCellCls: 'grid-hd-group-cell',
    
    /**
     * @cfg {String} title Optional title to be placed in the top left corner of the PivotGrid. Defaults to an empty string.
     */
    title: '',
    
    /**
     * @cfg {Function} getCellCls Optional function which should return a CSS class name for each cell value. This is useful when
     * color coding cells based on their value. Defaults to undefined.
     */
    
    /**
     * Returns the headers to be rendered at the top of the grid. Should be a 2-dimensional array, where each item specifies the number
     * of columns it groups (column in this case refers to normal grid columns). In the example below we have 5 city groups, which are
     * each part of a continent supergroup. The colspan for each city group refers to the number of normal grid columns that group spans,
     * so in this case the grid would be expected to have a total of 12 columns:
<pre><code>
[
    {
        items: [
            {header: 'England',   colspan: 5},
            {header: 'USA',       colspan: 3}
        ]
    },
    {
        items: [
            {header: 'London',    colspan: 2},
            {header: 'Cambridge', colspan: 3},
            {header: 'Palo Alto', colspan: 3}
        ]
    }
]
</code></pre>
     * In the example above we have cities nested under countries. The nesting could be deeper if desired - e.g. Continent -> Country ->
     * State -> City, or any other structure. The only constaint is that the same depth must be used throughout the structure.
     * @return {Array} A tree structure containing the headers to be rendered. Must include the colspan property at each level, which should
     * be the sum of all child nodes beneath this node.
     */
    getColumnHeaders: function() {
        return this.grid.topAxis.buildHeaders();;
    },
    
    /**
     * Returns the headers to be rendered on the left of the grid. Should be a 2-dimensional array, where each item specifies the number
     * of rows it groups. In the example below we have 5 city groups, which are each part of a continent supergroup. The rowspan for each 
     * city group refers to the number of normal grid columns that group spans, so in this case the grid would be expected to have a 
     * total of 12 rows:
<pre><code>
[
    {
        width: 90,
        items: [
            {header: 'England',   rowspan: 5},
            {header: 'USA',       rowspan: 3}
        ]
    },
    {
        width: 50,
        items: [
            {header: 'London',    rowspan: 2},
            {header: 'Cambridge', rowspan: 3},
            {header: 'Palo Alto', rowspan: 3}
        ]
    }
]
</code></pre>
     * In the example above we have cities nested under countries. The nesting could be deeper if desired - e.g. Continent -> Country ->
     * State -> City, or any other structure. The only constaint is that the same depth must be used throughout the structure.
     * @return {Array} A tree structure containing the headers to be rendered. Must include the colspan property at each level, which should
     * be the sum of all child nodes beneath this node.
     * Each group may specify the width it should be rendered with.
     * @return {Array} The row groups
     */
    getRowHeaders: function() {
        return this.grid.leftAxis.buildHeaders();
    },
    
    /**
     * @private
     * Renders rows between start and end indexes
     * @param {Number} startRow Index of the first row to render
     * @param {Number} endRow Index of the last row to render
     */
    renderRows : function(startRow, endRow) {
        var grid          = this.grid,
            rows          = grid.extractData(),
            rowCount      = rows.length,
            templates     = this.templates,
            renderer      = grid.renderer,
            hasRenderer   = typeof renderer == 'function',
            getCellCls    = this.getCellCls,
            hasGetCellCls = typeof getCellCls == 'function',
            cellTemplate  = templates.cell,
            rowTemplate   = templates.row,
            rowBuffer     = [],
            meta          = {},
            tstyle        = 'width:' + this.getGridInnerWidth() + 'px;',
            colBuffer, colCount, column, i, row;
        
        startRow = startRow || 0;
        endRow   = Ext.isDefined(endRow) ? endRow : rowCount - 1;
        
        for (i = 0; i < rowCount; i++) {
            row = rows[i];
            colCount  = row.length;
            colBuffer = [];
            
            //build up each column's HTML
            for (var j = 0; j < colCount; j++) {
                
                meta.id    = i + '-' + j;
                meta.css   = j === 0 ? 'x-grid3-cell-first ' : (j == (colCount - 1) ? 'x-grid3-cell-last ' : '');
                meta.attr  = meta.cellAttr = '';
                meta.value = row[j];

                if (Ext.isEmpty(meta.value)) {
                    meta.value = '&#160;';
                }
                
                if (hasRenderer) {
                    meta.value = renderer(meta.value);
                }
                
                if (hasGetCellCls) {
                    meta.css += getCellCls(meta.value) + ' ';
                }

                colBuffer[colBuffer.length] = cellTemplate.apply(meta);
            }
            
            rowBuffer[rowBuffer.length] = rowTemplate.apply({
                tstyle: tstyle,
                cols  : colCount,
                cells : colBuffer.join(""),
                alt   : ''
            });
        }
        
        return rowBuffer.join("");
    },
    
    /**
     * The master template to use when rendering the GridView. Has a default template
     * @property Ext.Template
     * @type masterTpl
     */
    masterTpl: new Ext.Template(
        '<div class="x-grid3 x-pivotgrid" hidefocus="true">',
            '<div class="x-grid3-viewport">',
                '<div class="x-grid3-header">',
                    '<div class="x-grid3-header-title"><span>{title}</span></div>',
                    '<div class="x-grid3-header-inner">',
                        '<div class="x-grid3-header-offset" style="{ostyle}"></div>',
                    '</div>',
                    '<div class="x-clear"></div>',
                '</div>',
                '<div class="x-grid3-scroller">',
                    '<div class="x-grid3-row-headers"></div>',
                    '<div class="x-grid3-body" style="{bstyle}">{body}</div>',
                    '<a href="#" class="x-grid3-focus" tabIndex="-1"></a>',
                '</div>',
            '</div>',
            '<div class="x-grid3-resize-marker">&#160;</div>',
            '<div class="x-grid3-resize-proxy">&#160;</div>',
        '</div>'
    ),
    
    /**
     * @private
     * Adds a gcell template to the internal templates object. This is used to render the headers in a multi-level column header.
     */
    initTemplates: function() {
        Ext.grid.PivotGridView.superclass.initTemplates.apply(this, arguments);
        
        var templates = this.templates || {};
        if (!templates.gcell) {
            templates.gcell = new Ext.XTemplate(
                '<td class="x-grid3-hd x-grid3-gcell x-grid3-td-{id} ux-grid-hd-group-row-{row} ' + this.colHeaderCellCls + '" style="{style}">',
                    '<div {tooltip} class="x-grid3-hd-inner x-grid3-hd-{id} x-unselectable" unselectable="on" style="{istyle}">', 
                        this.grid.enableHdMenu ? '<a class="x-grid3-hd-btn" href="#"></a>' : '', '{value}',
                    '</div>',
                '</td>'
            );
        }
        
        this.templates = templates;
        this.hrowRe = new RegExp("ux-grid-hd-group-row-(\\d+)", "");
    },
    
    /**
     * @private
     * Sets up the reference to the row headers element
     */
    initElements: function() {
        Ext.grid.PivotGridView.superclass.initElements.apply(this, arguments);
        
        /**
         * @property rowHeadersEl
         * @type Ext.Element
         * The element containing all row headers
         */
        this.rowHeadersEl = new Ext.Element(this.scroller.child('div.x-grid3-row-headers'));
        
        /**
         * @property headerTitleEl
         * @type Ext.Element
         * The element that contains the optional title (top left section of the pivot grid)
         */
        this.headerTitleEl = new Ext.Element(this.mainHd.child('div.x-grid3-header-title'));
    },
    
    /**
     * @private
     * Takes row headers into account when calculating total available width
     */
    getGridInnerWidth: function() {
        var previousWidth = Ext.grid.PivotGridView.superclass.getGridInnerWidth.apply(this, arguments);
        
        return previousWidth - this.getTotalRowHeaderWidth();
    },
    
    /**
     * Returns the total width of all row headers as specified by {@link #getRowHeaders}
     * @return {Number} The total width
     */
    getTotalRowHeaderWidth: function() {
        var headers = this.getRowHeaders(),
            length  = headers.length,
            total   = 0,
            i;
        
        for (i = 0; i< length; i++) {
            total += headers[i].width;
        }
        
        return total;
    },
    
    /**
     * @private
     * Returns the total height of all column headers
     * @return {Number} The total height
     */
    getTotalColumnHeaderHeight: function() {
        return this.getColumnHeaders().length * 21;
    },
    
    /**
     * Inherit docs
     * @private
     * @param {HTMLElement} el
     */
    getCellIndex : function(el) {
        if (el) {
            var match = el.className.match(this.colRe),
                data;
 
            if (match && (data = match[1])) {
                return parseInt(data.split('-')[1], 10);
            }
        }
        return false;
    },
    
    
    /**
     * @private
     * Slight specialisation of the GridView renderUI - just adds the row headers
     */
    renderUI : function() {
        var templates  = this.templates,
            innerWidth = this.getGridInnerWidth();
            
        return templates.master.apply({
            body  : templates.body.apply({rows:'&#160;'}),
            ostyle: 'width:' + innerWidth + 'px',
            bstyle: 'width:' + innerWidth + 'px'
        });
    },
    
    /**
     * @private
     * Make sure that the headers and rows are all sized correctly during layout
     */
    onLayout: function(width, height) {
        Ext.grid.PivotGridView.superclass.onLayout.apply(this, arguments);
        
        var width = this.getGridInnerWidth();
        
        this.resizeColumnHeaders(width);
        this.resizeAllRows(width);
    },
    
    /**
     * Refreshs the grid UI
     * @param {Boolean} headersToo (optional) True to also refresh the headers
     */
    refresh : function(headersToo) {
        this.fireEvent('beforerefresh', this);
        this.grid.stopEditing(true);
        
        var result = this.renderBody();
        this.mainBody.update(result).setWidth(this.getGridInnerWidth());
        if (headersToo === true) {
            this.updateHeaders();
            this.updateHeaderSortState();
        }
        this.processRows(0, true);
        this.layout();
        this.applyEmptyText();
        this.fireEvent('refresh', this);
    },
    
    /**
     * @private
     * Bypasses GridView's renderHeaders as they are taken care of separately by the PivotAxis instances
     */
    renderHeaders: Ext.emptyFn,
    
    /**
     * @private
     * Taken care of by PivotAxis
     */
    fitColumns: Ext.emptyFn,
    
    /**
     * @private
     * Called on layout, ensures that the width of each column header is correct. Omitting this can lead to faulty
     * layouts when nested in a container.
     * @param {Number} width The new width
     */
    resizeColumnHeaders: function(width) {
        var topAxis = this.grid.topAxis;
        
        if (topAxis.rendered) {
            topAxis.el.setWidth(width);
        }
    },
    
    /**
     * @private
     * Sets the row header div to the correct width. Should be called after rendering and reconfiguration of headers
     */
    resizeRowHeaders: function() {
        var rowHeaderWidth = this.getTotalRowHeaderWidth(),
            marginStyle    = String.format("margin-left: {0}px;", rowHeaderWidth);
        
        this.rowHeadersEl.setWidth(rowHeaderWidth);
        this.mainBody.applyStyles(marginStyle);
        Ext.fly(this.innerHd).applyStyles(marginStyle);
        
        this.headerTitleEl.setWidth(rowHeaderWidth);
        this.headerTitleEl.setHeight(this.getTotalColumnHeaderHeight());
    },
    
    /**
     * @private
     * Resizes all rendered rows to the given width. Usually called by onLayout
     * @param {Number} width The new width
     */
    resizeAllRows: function(width) {
        var rows   = this.getRows(),
            length = rows.length,
            i;
        
        for (i = 0; i < length; i++) {
            Ext.fly(rows[i]).setWidth(width);
            Ext.fly(rows[i]).child('table').setWidth(width);
        }
    },
    
    /**
     * @private
     * Updates the Row Headers, deferring the updating of Column Headers to GridView
     */
    updateHeaders: function() {
        this.renderGroupRowHeaders();
        this.renderGroupColumnHeaders();
    },
    
    /**
     * @private
     * Renders all row header groups at all levels based on the structure fetched from {@link #getGroupRowHeaders}
     */
    renderGroupRowHeaders: function() {
        var leftAxis = this.grid.leftAxis;
        
        this.resizeRowHeaders();
        leftAxis.rendered = false;
        leftAxis.render(this.rowHeadersEl);
        
        this.setTitle(this.title);
    },
    
    /**
     * Sets the title text in the top left segment of the PivotGridView
     * @param {String} title The title
     */
    setTitle: function(title) {
        this.headerTitleEl.child('span').dom.innerHTML = title;
    },
    
    /**
     * @private
     * Renders all column header groups at all levels based on the structure fetched from {@link #getColumnHeaders}
     */
    renderGroupColumnHeaders: function() {
        var topAxis = this.grid.topAxis;
        
        topAxis.rendered = false;
        topAxis.render(this.innerHd.firstChild);
    },
    
    /**
     * @private
     * Overridden to test whether the user is hovering over a group cell, in which case we don't show the menu
     */
    isMenuDisabled: function(cellIndex, el) {
        return true;
    }
});/**
 * @class Ext.grid.PivotAxis
 * @extends Ext.Component
 * <p>PivotAxis is a class that supports a {@link Ext.grid.PivotGrid}. Each PivotGrid contains two PivotAxis instances - the left
 * axis and the top axis. Each PivotAxis defines an ordered set of dimensions, each of which should correspond to a field in a
 * Store's Record (see {@link Ext.grid.PivotGrid} documentation for further explanation).</p>
 * <p>Developers should have little interaction with the PivotAxis instances directly as most of their management is performed by
 * the PivotGrid. An exception is the dynamic reconfiguration of axes at run time - to achieve this we use PivotAxis's 
 * {@link #setDimensions} function and refresh the grid:</p>
<pre><code>
var pivotGrid = new Ext.grid.PivotGrid({
    //some PivotGrid config here
});

//change the left axis dimensions
pivotGrid.leftAxis.setDimensions([
    {
        dataIndex: 'person',
        direction: 'DESC',
        width    : 100
    },
    {
        dataIndex: 'product',
        direction: 'ASC',
        width    : 80
    }
]);

pivotGrid.view.refresh(true);
</code></pre>
 * This clears the previous dimensions on the axis and redraws the grid with the new dimensions.
 */
Ext.grid.PivotAxis = Ext.extend(Ext.Component, {
    /**
     * @cfg {String} orientation One of 'vertical' or 'horizontal'. Defaults to horizontal
     */
    orientation: 'horizontal',
    
    /**
     * @cfg {Number} defaultHeaderWidth The width to render each row header that does not have a width specified via 
     {@link #getRowGroupHeaders}. Defaults to 80.
     */
    defaultHeaderWidth: 80,
    
    /**
     * @private
     * @cfg {Number} paddingWidth The amount of padding used by each cell.
     * TODO: From 4.x onwards this can be removed as it won't be needed. For now it is used to account for the differences between
     * the content box and border box measurement models
     */
    paddingWidth: 7,
    
    /**
     * Updates the dimensions used by this axis
     * @param {Array} dimensions The new dimensions
     */
    setDimensions: function(dimensions) {
        this.dimensions = dimensions;
    },
    
    /**
     * @private
     * Builds the html table that contains the dimensions for this axis. This branches internally between vertical
     * and horizontal orientations because the table structure is slightly different in each case
     */
    onRender: function(ct, position) {
        var rows = this.orientation == 'horizontal'
                 ? this.renderHorizontalRows()
                 : this.renderVerticalRows();
        
        this.el = Ext.DomHelper.overwrite(ct.dom, {tag: 'table', cn: rows}, true);
    },
    
    /**
     * @private
     * Specialised renderer for horizontal oriented axes
     * @return {Object} The HTML Domspec for a horizontal oriented axis
     */
    renderHorizontalRows: function() {
        var headers  = this.buildHeaders(),
            rowCount = headers.length,
            rows     = [],
            cells, cols, colCount, i, j;
        
        for (i = 0; i < rowCount; i++) {
            cells = [];
            cols  = headers[i].items;
            colCount = cols.length;

            for (j = 0; j < colCount; j++) {
                cells.push({
                    tag: 'td',
                    html: cols[j].header,
                    colspan: cols[j].span
                });
            }

            rows[i] = {
                tag: 'tr',
                cn: cells
            };
        }
        
        return rows;
    },
    
    /**
     * @private
     * Specialised renderer for vertical oriented axes
     * @return {Object} The HTML Domspec for a vertical oriented axis
     */
    renderVerticalRows: function() {
        var headers  = this.buildHeaders(),
            colCount = headers.length,
            rowCells = [],
            rows     = [],
            rowCount, col, row, colWidth, i, j;
        
        for (i = 0; i < colCount; i++) {
            col = headers[i];
            colWidth = col.width || 80;
            rowCount = col.items.length;
            
            for (j = 0; j < rowCount; j++) {
                row = col.items[j];
                
                rowCells[row.start] = rowCells[row.start] || [];
                rowCells[row.start].push({
                    tag    : 'td',
                    html   : row.header,
                    rowspan: row.span,
                    width  : Ext.isBorderBox ? colWidth : colWidth - this.paddingWidth
                });
            }
        }
        
        rowCount = rowCells.length;
        for (i = 0; i < rowCount; i++) {
            rows[i] = {
                tag: 'tr',
                cn : rowCells[i]
            };
        }
        
        return rows;
    },
    
    /**
     * @private
     * Returns the set of all unique tuples based on the bound store and dimension definitions.
     * Internally we construct a new, temporary store to make use of the multi-sort capabilities of Store. In
     * 4.x this functionality should have been moved to MixedCollection so this step should not be needed.
     * @return {Array} All unique tuples
     */
    getTuples: function() {
        var newStore = new Ext.data.Store({});
        
        newStore.data = this.store.data.clone();
        newStore.fields = this.store.fields;
        
        var sorters    = [],
            dimensions = this.dimensions,
            length     = dimensions.length,
            i;
        
        for (i = 0; i < length; i++) {
            sorters.push({
                field    : dimensions[i].dataIndex,
                direction: dimensions[i].direction || 'ASC'
            });
        }
        
        newStore.sort(sorters);
        
        var records = newStore.data.items,
            hashes  = [],
            tuples  = [],
            recData, hash, info, data, key;
        
        length = records.length;
        
        for (i = 0; i < length; i++) {
            info = this.getRecordInfo(records[i]);
            data = info.data;
            hash = "";
            
            for (key in data) {
                hash += data[key] + '---';
            }
            
            if (hashes.indexOf(hash) == -1) {
                hashes.push(hash);
                tuples.push(info);
            }
        }
        
        newStore.destroy();
        
        return tuples;
    },
    
    /**
     * @private
     */
    getRecordInfo: function(record) {
        var dimensions = this.dimensions,
            length  = dimensions.length,
            data    = {},
            dimension, dataIndex, i;
        
        //get an object containing just the data we are interested in based on the configured dimensions
        for (i = 0; i < length; i++) {
            dimension = dimensions[i];
            dataIndex = dimension.dataIndex;
            
            data[dataIndex] = record.get(dataIndex);
        }
        
        //creates a specialised matcher function for a given tuple. The returned function will return
        //true if the record passed to it matches the dataIndex values of each dimension in this axis
        var createMatcherFunction = function(data) {
            return function(record) {
                for (var dataIndex in data) {
                    if (record.get(dataIndex) != data[dataIndex]) {
                        return false;
                    }
                }
                
                return true;
            };
        };
        
        return {
            data: data,
            matcher: createMatcherFunction(data)
        };
    },
    
    /**
     * @private
     * Uses the calculated set of tuples to build an array of headers that can be rendered into a table using rowspan or
     * colspan. Basically this takes the set of tuples and spans any cells that run into one another, so if we had dimensions
     * of Person and Product and several tuples containing different Products for the same Person, those Products would be
     * spanned.
     * @return {Array} The headers
     */
    buildHeaders: function() {
        var tuples     = this.getTuples(),
            rowCount   = tuples.length,
            dimensions = this.dimensions,
            dimension,
            colCount   = dimensions.length,
            headers    = [],
            tuple, rows, currentHeader, previousHeader, span, start, isLast, changed, i, j;
        
        for (i = 0; i < colCount; i++) {
            dimension = dimensions[i];
            rows  = [];
            span  = 0;
            start = 0;
            
            for (j = 0; j < rowCount; j++) {
                tuple  = tuples[j];
                isLast = j == (rowCount - 1);
                currentHeader = tuple.data[dimension.dataIndex];
                
                /*
                 * 'changed' indicates that we need to create a new cell. This should be true whenever the cell
                 * above (previousHeader) is different from this cell, or when the cell on the previous dimension
                 * changed (e.g. if the current dimension is Product and the previous was Person, we need to start
                 * a new cell if Product is the same but Person changed, so we check the previous dimension and tuple)
                 */
                changed = previousHeader != undefined && previousHeader != currentHeader;
                if (i > 0 && j > 0) {
                    changed = changed || tuple.data[dimensions[i-1].dataIndex] != tuples[j-1].data[dimensions[i-1].dataIndex];
                }
                
                if (changed) {                    
                    rows.push({
                        header: previousHeader,
                        span  : span,
                        start : start
                    });
                    
                    start += span;
                    span = 0;
                }
                
                if (isLast) {
                    rows.push({
                        header: currentHeader,
                        span  : span + 1,
                        start : start
                    });
                    
                    start += span;
                    span = 0;
                }
                
                previousHeader = currentHeader;
                span++;
            }
            
            headers.push({
                items: rows,
                width: dimension.width || this.defaultHeaderWidth
            });
            
            previousHeader = undefined;
        }
        
        return headers;
    }
});
// private
// This is a support class used internally by the Grid components
Ext.grid.HeaderDragZone = Ext.extend(Ext.dd.DragZone, {
    maxDragWidth: 120,
    
    constructor : function(grid, hd, hd2){
        this.grid = grid;
        this.view = grid.getView();
        this.ddGroup = "gridHeader" + this.grid.getGridEl().id;
        Ext.grid.HeaderDragZone.superclass.constructor.call(this, hd);
        if(hd2){
            this.setHandleElId(Ext.id(hd));
            this.setOuterHandleElId(Ext.id(hd2));
        }
        this.scroll = false;
    },
    
    getDragData : function(e){
        var t = Ext.lib.Event.getTarget(e),
            h = this.view.findHeaderCell(t);
        if(h){
            return {ddel: h.firstChild, header:h};
        }
        return false;
    },

    onInitDrag : function(e){
        // keep the value here so we can restore it;
        this.dragHeadersDisabled = this.view.headersDisabled;
        this.view.headersDisabled = true;
        var clone = this.dragData.ddel.cloneNode(true);
        clone.id = Ext.id();
        clone.style.width = Math.min(this.dragData.header.offsetWidth,this.maxDragWidth) + "px";
        this.proxy.update(clone);
        return true;
    },

    afterValidDrop : function(){
        this.completeDrop();
    },

    afterInvalidDrop : function(){
        this.completeDrop();
    },
    
    completeDrop: function(){
        var v = this.view,
            disabled = this.dragHeadersDisabled;
        setTimeout(function(){
            v.headersDisabled = disabled;
        }, 50);
    }
});

// private
// This is a support class used internally by the Grid components
Ext.grid.HeaderDropZone = Ext.extend(Ext.dd.DropZone, {
    proxyOffsets : [-4, -9],
    fly: Ext.Element.fly,
    
    constructor : function(grid, hd, hd2){
        this.grid = grid;
        this.view = grid.getView();
        // split the proxies so they don't interfere with mouse events
        this.proxyTop = Ext.DomHelper.append(document.body, {
            cls:"col-move-top", html:"&#160;"
        }, true);
        this.proxyBottom = Ext.DomHelper.append(document.body, {
            cls:"col-move-bottom", html:"&#160;"
        }, true);
        this.proxyTop.hide = this.proxyBottom.hide = function(){
            this.setLeftTop(-100,-100);
            this.setStyle("visibility", "hidden");
        };
        this.ddGroup = "gridHeader" + this.grid.getGridEl().id;
        // temporarily disabled
        //Ext.dd.ScrollManager.register(this.view.scroller.dom);
        Ext.grid.HeaderDropZone.superclass.constructor.call(this, grid.getGridEl().dom);
    },

    getTargetFromEvent : function(e){
        var t = Ext.lib.Event.getTarget(e),
            cindex = this.view.findCellIndex(t);
        if(cindex !== false){
            return this.view.getHeaderCell(cindex);
        }
    },

    nextVisible : function(h){
        var v = this.view, cm = this.grid.colModel;
        h = h.nextSibling;
        while(h){
            if(!cm.isHidden(v.getCellIndex(h))){
                return h;
            }
            h = h.nextSibling;
        }
        return null;
    },

    prevVisible : function(h){
        var v = this.view, cm = this.grid.colModel;
        h = h.prevSibling;
        while(h){
            if(!cm.isHidden(v.getCellIndex(h))){
                return h;
            }
            h = h.prevSibling;
        }
        return null;
    },

    positionIndicator : function(h, n, e){
        var x = Ext.lib.Event.getPageX(e),
            r = Ext.lib.Dom.getRegion(n.firstChild),
            px, 
            pt, 
            py = r.top + this.proxyOffsets[1];
        if((r.right - x) <= (r.right-r.left)/2){
            px = r.right+this.view.borderWidth;
            pt = "after";
        }else{
            px = r.left;
            pt = "before";
        }

        if(this.grid.colModel.isFixed(this.view.getCellIndex(n))){
            return false;
        }

        px +=  this.proxyOffsets[0];
        this.proxyTop.setLeftTop(px, py);
        this.proxyTop.show();
        if(!this.bottomOffset){
            this.bottomOffset = this.view.mainHd.getHeight();
        }
        this.proxyBottom.setLeftTop(px, py+this.proxyTop.dom.offsetHeight+this.bottomOffset);
        this.proxyBottom.show();
        return pt;
    },

    onNodeEnter : function(n, dd, e, data){
        if(data.header != n){
            this.positionIndicator(data.header, n, e);
        }
    },

    onNodeOver : function(n, dd, e, data){
        var result = false;
        if(data.header != n){
            result = this.positionIndicator(data.header, n, e);
        }
        if(!result){
            this.proxyTop.hide();
            this.proxyBottom.hide();
        }
        return result ? this.dropAllowed : this.dropNotAllowed;
    },

    onNodeOut : function(n, dd, e, data){
        this.proxyTop.hide();
        this.proxyBottom.hide();
    },

    onNodeDrop : function(n, dd, e, data){
        var h = data.header;
        if(h != n){
            var cm = this.grid.colModel,
                x = Ext.lib.Event.getPageX(e),
                r = Ext.lib.Dom.getRegion(n.firstChild),
                pt = (r.right - x) <= ((r.right-r.left)/2) ? "after" : "before",
                oldIndex = this.view.getCellIndex(h),
                newIndex = this.view.getCellIndex(n);
            if(pt == "after"){
                newIndex++;
            }
            if(oldIndex < newIndex){
                newIndex--;
            }
            cm.moveColumn(oldIndex, newIndex);
            return true;
        }
        return false;
    }
});

Ext.grid.GridView.ColumnDragZone = Ext.extend(Ext.grid.HeaderDragZone, {
    
    constructor : function(grid, hd){
        Ext.grid.GridView.ColumnDragZone.superclass.constructor.call(this, grid, hd, null);
        this.proxy.el.addClass('x-grid3-col-dd');
    },
    
    handleMouseDown : function(e){
    },

    callHandleMouseDown : function(e){
        Ext.grid.GridView.ColumnDragZone.superclass.handleMouseDown.call(this, e);
    }
});// private
// This is a support class used internally by the Grid components
Ext.grid.SplitDragZone = Ext.extend(Ext.dd.DDProxy, {
    fly: Ext.Element.fly,
    
    constructor : function(grid, hd, hd2){
        this.grid = grid;
        this.view = grid.getView();
        this.proxy = this.view.resizeProxy;
        Ext.grid.SplitDragZone.superclass.constructor.call(this, hd,
            "gridSplitters" + this.grid.getGridEl().id, {
            dragElId : Ext.id(this.proxy.dom), resizeFrame:false
        });
        this.setHandleElId(Ext.id(hd));
        this.setOuterHandleElId(Ext.id(hd2));
        this.scroll = false;
    },

    b4StartDrag : function(x, y){
        this.view.headersDisabled = true;
        this.proxy.setHeight(this.view.mainWrap.getHeight());
        var w = this.cm.getColumnWidth(this.cellIndex);
        var minw = Math.max(w-this.grid.minColumnWidth, 0);
        this.resetConstraints();
        this.setXConstraint(minw, 1000);
        this.setYConstraint(0, 0);
        this.minX = x - minw;
        this.maxX = x + 1000;
        this.startPos = x;
        Ext.dd.DDProxy.prototype.b4StartDrag.call(this, x, y);
    },


    handleMouseDown : function(e){
        var ev = Ext.EventObject.setEvent(e);
        var t = this.fly(ev.getTarget());
        if(t.hasClass("x-grid-split")){
            this.cellIndex = this.view.getCellIndex(t.dom);
            this.split = t.dom;
            this.cm = this.grid.colModel;
            if(this.cm.isResizable(this.cellIndex) && !this.cm.isFixed(this.cellIndex)){
                Ext.grid.SplitDragZone.superclass.handleMouseDown.apply(this, arguments);
            }
        }
    },

    endDrag : function(e){
        this.view.headersDisabled = false;
        var endX = Math.max(this.minX, Ext.lib.Event.getPageX(e));
        var diff = endX - this.startPos;
        this.view.onColumnSplitterMoved(this.cellIndex, this.cm.getColumnWidth(this.cellIndex)+diff);
    },

    autoOffset : function(){
        this.setDelta(0,0);
    }
});/**
 * @class Ext.grid.GridDragZone
 * @extends Ext.dd.DragZone
 * <p>A customized implementation of a {@link Ext.dd.DragZone DragZone} which provides default implementations of two of the
 * template methods of DragZone to enable dragging of the selected rows of a GridPanel.</p>
 * <p>A cooperating {@link Ext.dd.DropZone DropZone} must be created who's template method implementations of
 * {@link Ext.dd.DropZone#onNodeEnter onNodeEnter}, {@link Ext.dd.DropZone#onNodeOver onNodeOver},
 * {@link Ext.dd.DropZone#onNodeOut onNodeOut} and {@link Ext.dd.DropZone#onNodeDrop onNodeDrop}</p> are able
 * to process the {@link #getDragData data} which is provided.
 */
Ext.grid.GridDragZone = function(grid, config){
    this.view = grid.getView();
    Ext.grid.GridDragZone.superclass.constructor.call(this, this.view.mainBody.dom, config);
    this.scroll = false;
    this.grid = grid;
    this.ddel = document.createElement('div');
    this.ddel.className = 'x-grid-dd-wrap';
    // prevent the default action, but don't stop propagation
    this.preventDefault = true;
};

Ext.extend(Ext.grid.GridDragZone, Ext.dd.DragZone, {
    ddGroup : "GridDD",

    /**
     * <p>The provided implementation of the getDragData method which collects the data to be dragged from the GridPanel on mousedown.</p>
     * <p>This data is available for processing in the {@link Ext.dd.DropZone#onNodeEnter onNodeEnter}, {@link Ext.dd.DropZone#onNodeOver onNodeOver},
     * {@link Ext.dd.DropZone#onNodeOut onNodeOut} and {@link Ext.dd.DropZone#onNodeDrop onNodeDrop} methods of a cooperating {@link Ext.dd.DropZone DropZone}.</p>
     * <p>The data object contains the following properties:<ul>
     * <li><b>grid</b> : Ext.Grid.GridPanel<div class="sub-desc">The GridPanel from which the data is being dragged.</div></li>
     * <li><b>ddel</b> : htmlElement<div class="sub-desc">An htmlElement which provides the "picture" of the data being dragged.</div></li>
     * <li><b>rowIndex</b> : Number<div class="sub-desc">The index of the row which receieved the mousedown gesture which triggered the drag.</div></li>
     * <li><b>selections</b> : Array<div class="sub-desc">Array of the selected Records which are being dragged from the GridPanel.
     * Unless a CellSelectionModel is being used and the grid is configured <code>dragCell: true</code>, in which case, this will be
     * an Array containing the single selected cell data as <code>[rowIndex, cellIndex]</code>.</div></li>
     * </ul></p>
     */
    getDragData : function(e){
        var t = Ext.lib.Event.getTarget(e),
            sm,
            rowIndex = this.view.findRowIndex(t),
            cellIndex,
            selectedCell,
            selection;

        if (rowIndex !== false){
            sm = this.grid.selModel;

            // Handle mousedown on unselected items (depending on what kind of selection we are using)
            // Select the mousedowned item
            if (sm.getSelectedCell) {
                cellIndex = this.view.findCellIndex(t);
                selectedCell = sm.getSelectedCell();
                if (!selectedCell || selectedCell[0] !== rowIndex || selectedCell[1] !== cellIndex) {
                    sm.handleMouseDown(this.grid, rowIndex, cellIndex, e);
                }
                if (this.grid.dragCell) {
                    // Selection is the cell coordinates
                    selection = sm.getSelectedCell();
                    if (!this.grid.hasOwnProperty('ddText')) {
                        this.grid.ddText = '{0} selected cell{1}';
                    }
                } else {
                    // Selection is the mousedowned row
                    selection = [this.grid.store.getAt(rowIndex)];
                }
            } else {
                if(!sm.isSelected(rowIndex) || e.hasModifier()){
                    sm.handleMouseDown(this.grid, rowIndex, e);
                }
                selection = sm.getSelections();
            }
            return {grid: this.grid, ddel: this.ddel, rowIndex: rowIndex, selections: selection};
        }
        return false;
    },

    /**
     * <p>The provided implementation of the onInitDrag method. Sets the <tt>innerHTML</tt> of the drag proxy which provides the "picture"
     * of the data being dragged.</p>
     * <p>The <tt>innerHTML</tt> data is found by calling the owning GridPanel's {@link Ext.grid.GridPanel#getDragDropText getDragDropText}.</p>
     */
    onInitDrag : function(e){
        var data = this.dragData;
        this.ddel.innerHTML = this.grid.getDragDropText();
        this.proxy.update(this.ddel);
        // fire start drag?
    },

    /**
     * An empty immplementation. Implement this to provide behaviour after a repair of an invalid drop. An implementation might highlight
     * the selected rows to show that they have not been dragged.
     */
    afterRepair : function(){
        this.dragging = false;
    },

    /**
     * <p>An empty implementation. Implement this to provide coordinates for the drag proxy to slide back to after an invalid drop.</p>
     * <p>Called before a repair of an invalid drop to get the XY to animate to.</p>
     * @param {EventObject} e The mouse up event
     * @return {Array} The xy location (e.g. [100, 200])
     */
    getRepairXY : function(e, data){
        return false;
    },

    onEndDrag : function(data, e){
        // fire end drag?
    },

    onValidDrop : function(dd, e, id){
        // fire drag drop?
        this.hideProxy();
    },

    beforeInvalidDrop : function(e, id){

    }
});
/**
 * @class Ext.grid.ColumnModel
 * @extends Ext.util.Observable
 * <p>After the data has been read into the client side cache (<b>{@link Ext.data.Store Store}</b>),
 * the ColumnModel is used to configure how and what parts of that data will be displayed in the
 * vertical slices (columns) of the grid. The Ext.grid.ColumnModel Class is the default implementation
 * of a ColumnModel used by implentations of {@link Ext.grid.GridPanel GridPanel}.</p>
 * <p>Data is mapped into the store's records and then indexed into the ColumnModel using the
 * <tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt>:</p>
 * <pre><code>
{data source} == mapping ==> {data store} == <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b> ==> {ColumnModel}
 * </code></pre>
 * <p>Each {@link Ext.grid.Column Column} in the grid's ColumnModel is configured with a
 * <tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt> to specify how the data within
 * each record in the store is indexed into the ColumnModel.</p>
 * <p>There are two ways to initialize the ColumnModel class:</p>
 * <p><u>Initialization Method 1: an Array</u></p>
<pre><code>
 var colModel = new Ext.grid.ColumnModel([
    { header: "Ticker", width: 60, sortable: true},
    { header: "Company Name", width: 150, sortable: true, id: 'company'},
    { header: "Market Cap.", width: 100, sortable: true},
    { header: "$ Sales", width: 100, sortable: true, renderer: money},
    { header: "Employees", width: 100, sortable: true, resizable: false}
 ]);
 </code></pre>
 * <p>The ColumnModel may be initialized with an Array of {@link Ext.grid.Column} column configuration
 * objects to define the initial layout / display of the columns in the Grid. The order of each
 * {@link Ext.grid.Column} column configuration object within the specified Array defines the initial
 * order of the column display.  A Column's display may be initially hidden using the
 * <tt>{@link Ext.grid.Column#hidden hidden}</tt></b> config property (and then shown using the column
 * header menu).  Fields that are not included in the ColumnModel will not be displayable at all.</p>
 * <p>How each column in the grid correlates (maps) to the {@link Ext.data.Record} field in the
 * {@link Ext.data.Store Store} the column draws its data from is configured through the
 * <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b>.  If the
 * <b><tt>{@link Ext.grid.Column#dataIndex dataIndex}</tt></b> is not explicitly defined (as shown in the
 * example above) it will use the column configuration's index in the Array as the index.</p>
 * <p>See <b><tt>{@link Ext.grid.Column}</tt></b> for additional configuration options for each column.</p>
 * <p><u>Initialization Method 2: an Object</u></p>
 * <p>In order to use configuration options from <tt>Ext.grid.ColumnModel</tt>, an Object may be used to
 * initialize the ColumnModel.  The column configuration Array will be specified in the <tt><b>{@link #columns}</b></tt>
 * config property. The <tt><b>{@link #defaults}</b></tt> config property can be used to apply defaults
 * for all columns, e.g.:</p><pre><code>
 var colModel = new Ext.grid.ColumnModel({
    columns: [
        { header: "Ticker", width: 60, menuDisabled: false},
        { header: "Company Name", width: 150, id: 'company'},
        { header: "Market Cap."},
        { header: "$ Sales", renderer: money},
        { header: "Employees", resizable: false}
    ],
    defaults: {
        sortable: true,
        menuDisabled: true,
        width: 100
    },
    listeners: {
        {@link #hiddenchange}: function(cm, colIndex, hidden) {
            saveConfig(colIndex, hidden);
        }
    }
});
 </code></pre>
 * <p>In both examples above, the ability to apply a CSS class to all cells in a column (including the
 * header) is demonstrated through the use of the <b><tt>{@link Ext.grid.Column#id id}</tt></b> config
 * option. This column could be styled by including the following css:</p><pre><code>
 //add this css *after* the core css is loaded
.x-grid3-td-company {
    color: red; // entire column will have red font
}
// modify the header row only, adding an icon to the column header
.x-grid3-hd-company {
    background: transparent
        url(../../resources/images/icons/silk/building.png)
        no-repeat 3px 3px ! important;
        padding-left:20px;
}
 </code></pre>
 * Note that the "Company Name" column could be specified as the
 * <b><tt>{@link Ext.grid.GridPanel}.{@link Ext.grid.GridPanel#autoExpandColumn autoExpandColumn}</tt></b>.
 * @constructor
 * @param {Mixed} config Specify either an Array of {@link Ext.grid.Column} configuration objects or specify
 * a configuration Object (see introductory section discussion utilizing Initialization Method 2 above).
 */
Ext.grid.ColumnModel = Ext.extend(Ext.util.Observable, {
    /**
     * @cfg {Number} defaultWidth (optional) The width of columns which have no <tt>{@link #width}</tt>
     * specified (defaults to <tt>100</tt>).  This property shall preferably be configured through the
     * <tt><b>{@link #defaults}</b></tt> config property.
     */
    defaultWidth: 100,

    /**
     * @cfg {Boolean} defaultSortable (optional) Default sortable of columns which have no
     * sortable specified (defaults to <tt>false</tt>).  This property shall preferably be configured
     * through the <tt><b>{@link #defaults}</b></tt> config property.
     */
    defaultSortable: false,

    /**
     * @cfg {Array} columns An Array of object literals.  The config options defined by
     * <b>{@link Ext.grid.Column}</b> are the options which may appear in the object literal for each
     * individual column definition.
     */

    /**
     * @cfg {Object} defaults Object literal which will be used to apply {@link Ext.grid.Column}
     * configuration options to all <tt><b>{@link #columns}</b></tt>.  Configuration options specified with
     * individual {@link Ext.grid.Column column} configs will supersede these <tt><b>{@link #defaults}</b></tt>.
     */

    constructor : function(config) {
        /**
	     * An Array of {@link Ext.grid.Column Column definition} objects representing the configuration
	     * of this ColumnModel.  See {@link Ext.grid.Column} for the configuration properties that may
	     * be specified.
	     * @property config
	     * @type Array
	     */
	    if (config.columns) {
	        Ext.apply(this, config);
	        this.setConfig(config.columns, true);
	    } else {
	        this.setConfig(config, true);
	    }
	    
	    this.addEvents(
	        /**
	         * @event widthchange
	         * Fires when the width of a column is programmaticially changed using
	         * <code>{@link #setColumnWidth}</code>.
	         * Note internal resizing suppresses the event from firing. See also
	         * {@link Ext.grid.GridPanel}.<code>{@link #columnresize}</code>.
	         * @param {ColumnModel} this
	         * @param {Number} columnIndex The column index
	         * @param {Number} newWidth The new width
	         */
	        "widthchange",
	        
	        /**
	         * @event headerchange
	         * Fires when the text of a header changes.
	         * @param {ColumnModel} this
	         * @param {Number} columnIndex The column index
	         * @param {String} newText The new header text
	         */
	        "headerchange",
	        
	        /**
	         * @event hiddenchange
	         * Fires when a column is hidden or "unhidden".
	         * @param {ColumnModel} this
	         * @param {Number} columnIndex The column index
	         * @param {Boolean} hidden true if hidden, false otherwise
	         */
	        "hiddenchange",
	        
	        /**
	         * @event columnmoved
	         * Fires when a column is moved.
	         * @param {ColumnModel} this
	         * @param {Number} oldIndex
	         * @param {Number} newIndex
	         */
	        "columnmoved",
	        
	        /**
	         * @event configchange
	         * Fires when the configuration is changed
	         * @param {ColumnModel} this
	         */
	        "configchange"
	    );
	    
	    Ext.grid.ColumnModel.superclass.constructor.call(this);
    },

    /**
     * Returns the id of the column at the specified index.
     * @param {Number} index The column index
     * @return {String} the id
     */
    getColumnId : function(index) {
        return this.config[index].id;
    },

    getColumnAt : function(index) {
        return this.config[index];
    },

    /**
     * <p>Reconfigures this column model according to the passed Array of column definition objects.
     * For a description of the individual properties of a column definition object, see the
     * <a href="#Ext.grid.ColumnModel-configs">Config Options</a>.</p>
     * <p>Causes the {@link #configchange} event to be fired. A {@link Ext.grid.GridPanel GridPanel}
     * using this ColumnModel will listen for this event and refresh its UI automatically.</p>
     * @param {Array} config Array of Column definition objects.
     * @param {Boolean} initial Specify <tt>true</tt> to bypass cleanup which deletes the <tt>totalWidth</tt>
     * and destroys existing editors.
     */
    setConfig : function(config, initial) {
        var i, c, len;
        
        if (!initial) { // cleanup
            delete this.totalWidth;
            
            for (i = 0, len = this.config.length; i < len; i++) {
                c = this.config[i];
                
                if (c.setEditor) {
                    //check here, in case we have a special column like a CheckboxSelectionModel
                    c.setEditor(null);
                }
            }
        }

        // backward compatibility
        this.defaults = Ext.apply({
            width: this.defaultWidth,
            sortable: this.defaultSortable
        }, this.defaults);

        this.config = config;
        this.lookup = {};

        for (i = 0, len = config.length; i < len; i++) {
            c = Ext.applyIf(config[i], this.defaults);
            
            // if no id, create one using column's ordinal position
            if (Ext.isEmpty(c.id)) {
                c.id = i;
            }
            
            if (!c.isColumn) {
                var Cls = Ext.grid.Column.types[c.xtype || 'gridcolumn'];
                c = new Cls(c);
                config[i] = c;
            }
            
            this.lookup[c.id] = c;
        }
        
        if (!initial) {
            this.fireEvent('configchange', this);
        }
    },

    /**
     * Returns the column for a specified id.
     * @param {String} id The column id
     * @return {Object} the column
     */
    getColumnById : function(id) {
        return this.lookup[id];
    },

    /**
     * Returns the index for a specified column id.
     * @param {String} id The column id
     * @return {Number} the index, or -1 if not found
     */
    getIndexById : function(id) {
        for (var i = 0, len = this.config.length; i < len; i++) {
            if (this.config[i].id == id) {
                return i;
            }
        }
        return -1;
    },

    /**
     * Moves a column from one position to another.
     * @param {Number} oldIndex The index of the column to move.
     * @param {Number} newIndex The position at which to reinsert the coolumn.
     */
    moveColumn : function(oldIndex, newIndex) {
        var config = this.config,
            c      = config[oldIndex];
            
        config.splice(oldIndex, 1);
        config.splice(newIndex, 0, c);
        this.dataMap = null;
        this.fireEvent("columnmoved", this, oldIndex, newIndex);
    },

    /**
     * Returns the number of columns.
     * @param {Boolean} visibleOnly Optional. Pass as true to only include visible columns.
     * @return {Number}
     */
    getColumnCount : function(visibleOnly) {
        var length = this.config.length,
            c = 0,
            i;
        
        if (visibleOnly === true) {
            for (i = 0; i < length; i++) {
                if (!this.isHidden(i)) {
                    c++;
                }
            }
            
            return c;
        }
        
        return length;
    },

    /**
     * Returns the column configs that return true by the passed function that is called
     * with (columnConfig, index)
<pre><code>
// returns an array of column config objects for all hidden columns
var columns = grid.getColumnModel().getColumnsBy(function(c){
  return c.hidden;
});
</code></pre>
     * @param {Function} fn A function which, when passed a {@link Ext.grid.Column Column} object, must
     * return <code>true</code> if the column is to be included in the returned Array.
     * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function
     * is executed. Defaults to this ColumnModel.
     * @return {Array} result
     */
    getColumnsBy : function(fn, scope) {
        var config = this.config,
            length = config.length,
            result = [],
            i, c;
            
        for (i = 0; i < length; i++){
            c = config[i];
            
            if (fn.call(scope || this, c, i) === true) {
                result[result.length] = c;
            }
        }
        
        return result;
    },

    /**
     * Returns true if the specified column is sortable.
     * @param {Number} col The column index
     * @return {Boolean}
     */
    isSortable : function(col) {
        return !!this.config[col].sortable;
    },

    /**
     * Returns true if the specified column menu is disabled.
     * @param {Number} col The column index
     * @return {Boolean}
     */
    isMenuDisabled : function(col) {
        return !!this.config[col].menuDisabled;
    },

    /**
     * Returns the rendering (formatting) function defined for the column.
     * @param {Number} col The column index.
     * @return {Function} The function used to render the cell. See {@link #setRenderer}.
     */
    getRenderer : function(col) {
        return this.config[col].renderer || Ext.grid.ColumnModel.defaultRenderer;
    },

    getRendererScope : function(col) {
        return this.config[col].scope;
    },

    /**
     * Sets the rendering (formatting) function for a column.  See {@link Ext.util.Format} for some
     * default formatting functions.
     * @param {Number} col The column index
     * @param {Function} fn The function to use to process the cell's raw data
     * to return HTML markup for the grid view. The render function is called with
     * the following parameters:<ul>
     * <li><b>value</b> : Object<p class="sub-desc">The data value for the cell.</p></li>
     * <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     * <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     * <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     * (e.g. 'style="color:red;"').</p></li></ul></p></li>
     * <li><b>record</b> : Ext.data.record<p class="sub-desc">The {@link Ext.data.Record} from which the data was extracted.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">Row index</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">Column index</p></li>
     * <li><b>store</b> : Ext.data.Store<p class="sub-desc">The {@link Ext.data.Store} object from which the Record was extracted.</p></li></ul>
     */
    setRenderer : function(col, fn) {
        this.config[col].renderer = fn;
    },

    /**
     * Returns the width for the specified column.
     * @param {Number} col The column index
     * @return {Number}
     */
    getColumnWidth : function(col) {
        var width = this.config[col].width;
        if(typeof width != 'number'){
            width = this.defaultWidth;
        }
        return width;
    },

    /**
     * Sets the width for a column.
     * @param {Number} col The column index
     * @param {Number} width The new width
     * @param {Boolean} suppressEvent True to suppress firing the <code>{@link #widthchange}</code>
     * event. Defaults to false.
     */
    setColumnWidth : function(col, width, suppressEvent) {
        this.config[col].width = width;
        this.totalWidth = null;
        
        if (!suppressEvent) {
             this.fireEvent("widthchange", this, col, width);
        }
    },

    /**
     * Returns the total width of all columns.
     * @param {Boolean} includeHidden True to include hidden column widths
     * @return {Number}
     */
    getTotalWidth : function(includeHidden) {
        if (!this.totalWidth) {
            this.totalWidth = 0;
            for (var i = 0, len = this.config.length; i < len; i++) {
                if (includeHidden || !this.isHidden(i)) {
                    this.totalWidth += this.getColumnWidth(i);
                }
            }
        }
        return this.totalWidth;
    },

    /**
     * Returns the header for the specified column.
     * @param {Number} col The column index
     * @return {String}
     */
    getColumnHeader : function(col) {
        return this.config[col].header;
    },

    /**
     * Sets the header for a column.
     * @param {Number} col The column index
     * @param {String} header The new header
     */
    setColumnHeader : function(col, header) {
        this.config[col].header = header;
        this.fireEvent("headerchange", this, col, header);
    },

    /**
     * Returns the tooltip for the specified column.
     * @param {Number} col The column index
     * @return {String}
     */
    getColumnTooltip : function(col) {
            return this.config[col].tooltip;
    },
    /**
     * Sets the tooltip for a column.
     * @param {Number} col The column index
     * @param {String} tooltip The new tooltip
     */
    setColumnTooltip : function(col, tooltip) {
            this.config[col].tooltip = tooltip;
    },

    /**
     * Returns the dataIndex for the specified column.
<pre><code>
// Get field name for the column
var fieldName = grid.getColumnModel().getDataIndex(columnIndex);
</code></pre>
     * @param {Number} col The column index
     * @return {String} The column's dataIndex
     */
    getDataIndex : function(col) {
        return this.config[col].dataIndex;
    },

    /**
     * Sets the dataIndex for a column.
     * @param {Number} col The column index
     * @param {String} dataIndex The new dataIndex
     */
    setDataIndex : function(col, dataIndex) {
        this.config[col].dataIndex = dataIndex;
    },

    /**
     * Finds the index of the first matching column for the given dataIndex.
     * @param {String} col The dataIndex to find
     * @return {Number} The column index, or -1 if no match was found
     */
    findColumnIndex : function(dataIndex) {
        var c = this.config;
        for(var i = 0, len = c.length; i < len; i++){
            if(c[i].dataIndex == dataIndex){
                return i;
            }
        }
        return -1;
    },

    /**
     * Returns true if the cell is editable.
<pre><code>
var store = new Ext.data.Store({...});
var colModel = new Ext.grid.ColumnModel({
  columns: [...],
  isCellEditable: function(col, row) {
    var record = store.getAt(row);
    if (record.get('readonly')) { // replace with your condition
      return false;
    }
    return Ext.grid.ColumnModel.prototype.isCellEditable.call(this, col, row);
  }
});
var grid = new Ext.grid.GridPanel({
  store: store,
  colModel: colModel,
  ...
});
</code></pre>
     * @param {Number} colIndex The column index
     * @param {Number} rowIndex The row index
     * @return {Boolean}
     */
    isCellEditable : function(colIndex, rowIndex) {
        var c = this.config[colIndex],
            ed = c.editable;

        //force boolean
        return !!(ed || (!Ext.isDefined(ed) && c.editor));
    },

    /**
     * Returns the editor defined for the cell/column.
     * @param {Number} colIndex The column index
     * @param {Number} rowIndex The row index
     * @return {Ext.Editor} The {@link Ext.Editor Editor} that was created to wrap
     * the {@link Ext.form.Field Field} used to edit the cell.
     */
    getCellEditor : function(colIndex, rowIndex) {
        return this.config[colIndex].getCellEditor(rowIndex);
    },

    /**
     * Sets if a column is editable.
     * @param {Number} col The column index
     * @param {Boolean} editable True if the column is editable
     */
    setEditable : function(col, editable) {
        this.config[col].editable = editable;
    },

    /**
     * Returns <tt>true</tt> if the column is <code>{@link Ext.grid.Column#hidden hidden}</code>,
     * <tt>false</tt> otherwise.
     * @param {Number} colIndex The column index
     * @return {Boolean}
     */
    isHidden : function(colIndex) {
        return !!this.config[colIndex].hidden; // ensure returns boolean
    },

    /**
     * Returns <tt>true</tt> if the column is <code>{@link Ext.grid.Column#fixed fixed}</code>,
     * <tt>false</tt> otherwise.
     * @param {Number} colIndex The column index
     * @return {Boolean}
     */
    isFixed : function(colIndex) {
        return !!this.config[colIndex].fixed;
    },

    /**
     * Returns true if the column can be resized
     * @return {Boolean}
     */
    isResizable : function(colIndex) {
        return colIndex >= 0 && this.config[colIndex].resizable !== false && this.config[colIndex].fixed !== true;
    },
    
    /**
     * Sets if a column is hidden.
<pre><code>
myGrid.getColumnModel().setHidden(0, true); // hide column 0 (0 = the first column).
</code></pre>
     * @param {Number} colIndex The column index
     * @param {Boolean} hidden True if the column is hidden
     */
    setHidden : function(colIndex, hidden) {
        var c = this.config[colIndex];
        if(c.hidden !== hidden){
            c.hidden = hidden;
            this.totalWidth = null;
            this.fireEvent("hiddenchange", this, colIndex, hidden);
        }
    },

    /**
     * Sets the editor for a column and destroys the prior editor.
     * @param {Number} col The column index
     * @param {Object} editor The editor object
     */
    setEditor : function(col, editor) {
        this.config[col].setEditor(editor);
    },

    /**
     * Destroys this column model by purging any event listeners. Destroys and dereferences all Columns.
     */
    destroy : function() {
        var length = this.config.length,
            i = 0;

        for (; i < length; i++){
            this.config[i].destroy(); // Column's destroy encapsulates all cleanup.
        }
        delete this.config;
        delete this.lookup;
        this.purgeListeners();
    },

    /**
     * @private
     * Setup any saved state for the column, ensures that defaults are applied.
     */
    setState : function(col, state) {
        state = Ext.applyIf(state, this.defaults);
        Ext.apply(this.config[col], state);
    }
});

// private
Ext.grid.ColumnModel.defaultRenderer = function(value) {
    if (typeof value == "string" && value.length < 1) {
        return "&#160;";
    }
    return value;
};/**
 * @class Ext.grid.AbstractSelectionModel
 * @extends Ext.util.Observable
 * Abstract base class for grid SelectionModels.  It provides the interface that should be
 * implemented by descendant classes.  This class should not be directly instantiated.
 * @constructor
 */
Ext.grid.AbstractSelectionModel = Ext.extend(Ext.util.Observable,  {
    /**
     * The GridPanel for which this SelectionModel is handling selection. Read-only.
     * @type Object
     * @property grid
     */

    constructor : function(){
        this.locked = false;
        Ext.grid.AbstractSelectionModel.superclass.constructor.call(this);
    },

    /** @ignore Called by the grid automatically. Do not call directly. */
    init : function(grid){
        this.grid = grid;
        if(this.lockOnInit){
            delete this.lockOnInit;
            this.locked = false;
            this.lock();
        }
        this.initEvents();
    },

    /**
     * Locks the selections.
     */
    lock : function(){
        if(!this.locked){
            this.locked = true;
            // If the grid has been set, then the view is already initialized.
            var g = this.grid;
            if(g){
                g.getView().on({
                    scope: this,
                    beforerefresh: this.sortUnLock,
                    refresh: this.sortLock
                });
            }else{
                this.lockOnInit = true;
            }
        }
    },

    // set the lock states before and after a view refresh
    sortLock : function() {
        this.locked = true;
    },

    // set the lock states before and after a view refresh
    sortUnLock : function() {
        this.locked = false;
    },

    /**
     * Unlocks the selections.
     */
    unlock : function(){
        if(this.locked){
            this.locked = false;
            var g = this.grid,
                gv;
                
            // If the grid has been set, then the view is already initialized.
            if(g){
                gv = g.getView();
                gv.un('beforerefresh', this.sortUnLock, this);
                gv.un('refresh', this.sortLock, this);    
            }else{
                delete this.lockOnInit;
            }
        }
    },

    /**
     * Returns true if the selections are locked.
     * @return {Boolean}
     */
    isLocked : function(){
        return this.locked;
    },

    destroy: function(){
        this.unlock();
        this.purgeListeners();
    }
});/**
 * @class Ext.grid.RowSelectionModel
 * @extends Ext.grid.AbstractSelectionModel
 * The default SelectionModel used by {@link Ext.grid.GridPanel}.
 * It supports multiple selections and keyboard selection/navigation. The objects stored
 * as selections and returned by {@link #getSelected}, and {@link #getSelections} are
 * the {@link Ext.data.Record Record}s which provide the data for the selected rows.
 * @constructor
 * @param {Object} config
 */
Ext.grid.RowSelectionModel = Ext.extend(Ext.grid.AbstractSelectionModel,  {
    /**
     * @cfg {Boolean} singleSelect
     * <tt>true</tt> to allow selection of only one row at a time (defaults to <tt>false</tt>
     * allowing multiple selections)
     */
    singleSelect : false,
    
    constructor : function(config){
        Ext.apply(this, config);
        this.selections = new Ext.util.MixedCollection(false, function(o){
            return o.id;
        });

        this.last = false;
        this.lastActive = false;

        this.addEvents(
	        /**
	         * @event selectionchange
	         * Fires when the selection changes
	         * @param {SelectionModel} this
	         */
	        'selectionchange',
	        /**
	         * @event beforerowselect
	         * Fires before a row is selected, return false to cancel the selection.
	         * @param {SelectionModel} this
	         * @param {Number} rowIndex The index to be selected
	         * @param {Boolean} keepExisting False if other selections will be cleared
	         * @param {Record} record The record to be selected
	         */
	        'beforerowselect',
	        /**
	         * @event rowselect
	         * Fires when a row is selected.
	         * @param {SelectionModel} this
	         * @param {Number} rowIndex The selected index
	         * @param {Ext.data.Record} r The selected record
	         */
	        'rowselect',
	        /**
	         * @event rowdeselect
	         * Fires when a row is deselected.  To prevent deselection
	         * {@link Ext.grid.AbstractSelectionModel#lock lock the selections}. 
	         * @param {SelectionModel} this
	         * @param {Number} rowIndex
	         * @param {Record} record
	         */
	        'rowdeselect'
        );
        Ext.grid.RowSelectionModel.superclass.constructor.call(this);
    },

    /**
     * @cfg {Boolean} moveEditorOnEnter
     * <tt>false</tt> to turn off moving the editor to the next row down when the enter key is pressed
     * or the next row up when shift + enter keys are pressed.
     */
    // private
    initEvents : function(){

        if(!this.grid.enableDragDrop && !this.grid.enableDrag){
            this.grid.on('rowmousedown', this.handleMouseDown, this);
        }

        this.rowNav = new Ext.KeyNav(this.grid.getGridEl(), {
            up: this.onKeyPress, 
            down: this.onKeyPress,
            scope: this
        });

        this.grid.getView().on({
            scope: this,
            refresh: this.onRefresh,
            rowupdated: this.onRowUpdated,
            rowremoved: this.onRemove
        });
    },
    
    onKeyPress : function(e, name){
        var up = name == 'up',
            method = up ? 'selectPrevious' : 'selectNext',
            add = up ? -1 : 1,
            last;
        if(!e.shiftKey || this.singleSelect){
            this[method](false);
        }else if(this.last !== false && this.lastActive !== false){
            last = this.last;
            this.selectRange(this.last,  this.lastActive + add);
            this.grid.getView().focusRow(this.lastActive);
            if(last !== false){
                this.last = last;
            }
        }else{
           this.selectFirstRow();
        }
    },

    // private
    onRefresh : function(){
        var ds = this.grid.store,
            s = this.getSelections(),
            i = 0,
            len = s.length, 
            index, r;
            
        this.silent = true;
        this.clearSelections(true);
        for(; i < len; i++){
            r = s[i];
            if((index = ds.indexOfId(r.id)) != -1){
                this.selectRow(index, true);
            }
        }
        if(s.length != this.selections.getCount()){
            this.fireEvent('selectionchange', this);
        }
        this.silent = false;
    },

    // private
    onRemove : function(v, index, r){
        if(this.selections.remove(r) !== false){
            this.fireEvent('selectionchange', this);
        }
    },

    // private
    onRowUpdated : function(v, index, r){
        if(this.isSelected(r)){
            v.onRowSelect(index);
        }
    },

    /**
     * Select records.
     * @param {Array} records The records to select
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep existing selections
     */
    selectRecords : function(records, keepExisting){
        if(!keepExisting){
            this.clearSelections();
        }
        var ds = this.grid.store,
            i = 0,
            len = records.length;
        for(; i < len; i++){
            this.selectRow(ds.indexOf(records[i]), true);
        }
    },

    /**
     * Gets the number of selected rows.
     * @return {Number}
     */
    getCount : function(){
        return this.selections.length;
    },

    /**
     * Selects the first row in the grid.
     */
    selectFirstRow : function(){
        this.selectRow(0);
    },

    /**
     * Select the last row.
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep existing selections
     */
    selectLastRow : function(keepExisting){
        this.selectRow(this.grid.store.getCount() - 1, keepExisting);
    },

    /**
     * Selects the row immediately following the last selected row.
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep existing selections
     * @return {Boolean} <tt>true</tt> if there is a next row, else <tt>false</tt>
     */
    selectNext : function(keepExisting){
        if(this.hasNext()){
            this.selectRow(this.last+1, keepExisting);
            this.grid.getView().focusRow(this.last);
            return true;
        }
        return false;
    },

    /**
     * Selects the row that precedes the last selected row.
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep existing selections
     * @return {Boolean} <tt>true</tt> if there is a previous row, else <tt>false</tt>
     */
    selectPrevious : function(keepExisting){
        if(this.hasPrevious()){
            this.selectRow(this.last-1, keepExisting);
            this.grid.getView().focusRow(this.last);
            return true;
        }
        return false;
    },

    /**
     * Returns true if there is a next record to select
     * @return {Boolean}
     */
    hasNext : function(){
        return this.last !== false && (this.last+1) < this.grid.store.getCount();
    },

    /**
     * Returns true if there is a previous record to select
     * @return {Boolean}
     */
    hasPrevious : function(){
        return !!this.last;
    },


    /**
     * Returns the selected records
     * @return {Array} Array of selected records
     */
    getSelections : function(){
        return [].concat(this.selections.items);
    },

    /**
     * Returns the first selected record.
     * @return {Record}
     */
    getSelected : function(){
        return this.selections.itemAt(0);
    },

    /**
     * Calls the passed function with each selection. If the function returns
     * <tt>false</tt>, iteration is stopped and this function returns
     * <tt>false</tt>. Otherwise it returns <tt>true</tt>.
     * @param {Function} fn The function to call upon each iteration. It is passed the selected {@link Ext.data.Record Record}.
     * @param {Object} scope (optional) The scope (<code>this</code> reference) in which the function is executed. Defaults to this RowSelectionModel.
     * @return {Boolean} true if all selections were iterated
     */
    each : function(fn, scope){
        var s = this.getSelections(),
            i = 0,
            len = s.length;
            
        for(; i < len; i++){
            if(fn.call(scope || this, s[i], i) === false){
                return false;
            }
        }
        return true;
    },

    /**
     * Clears all selections if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is not locked}.
     * @param {Boolean} fast (optional) <tt>true</tt> to bypass the
     * conditional checks and events described in {@link #deselectRow}.
     */
    clearSelections : function(fast){
        if(this.isLocked()){
            return;
        }
        if(fast !== true){
            var ds = this.grid.store,
                s = this.selections;
            s.each(function(r){
                this.deselectRow(ds.indexOfId(r.id));
            }, this);
            s.clear();
        }else{
            this.selections.clear();
        }
        this.last = false;
    },


    /**
     * Selects all rows if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is not locked}. 
     */
    selectAll : function(){
        if(this.isLocked()){
            return;
        }
        this.selections.clear();
        for(var i = 0, len = this.grid.store.getCount(); i < len; i++){
            this.selectRow(i, true);
        }
    },

    /**
     * Returns <tt>true</tt> if there is a selection.
     * @return {Boolean}
     */
    hasSelection : function(){
        return this.selections.length > 0;
    },

    /**
     * Returns <tt>true</tt> if the specified row is selected.
     * @param {Number/Record} index The record or index of the record to check
     * @return {Boolean}
     */
    isSelected : function(index){
        var r = Ext.isNumber(index) ? this.grid.store.getAt(index) : index;
        return (r && this.selections.key(r.id) ? true : false);
    },

    /**
     * Returns <tt>true</tt> if the specified record id is selected.
     * @param {String} id The id of record to check
     * @return {Boolean}
     */
    isIdSelected : function(id){
        return (this.selections.key(id) ? true : false);
    },

    // private
    handleMouseDown : function(g, rowIndex, e){
        if(e.button !== 0 || this.isLocked()){
            return;
        }
        var view = this.grid.getView();
        if(e.shiftKey && !this.singleSelect && this.last !== false){
            var last = this.last;
            this.selectRange(last, rowIndex, e.ctrlKey);
            this.last = last; // reset the last
            view.focusRow(rowIndex);
        }else{
            var isSelected = this.isSelected(rowIndex);
            if(e.ctrlKey && isSelected){
                this.deselectRow(rowIndex);
            }else if(!isSelected || this.getCount() > 1){
                this.selectRow(rowIndex, e.ctrlKey || e.shiftKey);
                view.focusRow(rowIndex);
            }
        }
    },

    /**
     * Selects multiple rows.
     * @param {Array} rows Array of the indexes of the row to select
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep
     * existing selections (defaults to <tt>false</tt>)
     */
    selectRows : function(rows, keepExisting){
        if(!keepExisting){
            this.clearSelections();
        }
        for(var i = 0, len = rows.length; i < len; i++){
            this.selectRow(rows[i], true);
        }
    },

    /**
     * Selects a range of rows if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is not locked}.
     * All rows in between startRow and endRow are also selected.
     * @param {Number} startRow The index of the first row in the range
     * @param {Number} endRow The index of the last row in the range
     * @param {Boolean} keepExisting (optional) True to retain existing selections
     */
    selectRange : function(startRow, endRow, keepExisting){
        var i;
        if(this.isLocked()){
            return;
        }
        if(!keepExisting){
            this.clearSelections();
        }
        if(startRow <= endRow){
            for(i = startRow; i <= endRow; i++){
                this.selectRow(i, true);
            }
        }else{
            for(i = startRow; i >= endRow; i--){
                this.selectRow(i, true);
            }
        }
    },

    /**
     * Deselects a range of rows if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is not locked}.  
     * All rows in between startRow and endRow are also deselected.
     * @param {Number} startRow The index of the first row in the range
     * @param {Number} endRow The index of the last row in the range
     */
    deselectRange : function(startRow, endRow, preventViewNotify){
        if(this.isLocked()){
            return;
        }
        for(var i = startRow; i <= endRow; i++){
            this.deselectRow(i, preventViewNotify);
        }
    },

    /**
     * Selects a row.  Before selecting a row, checks if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is locked} and fires the
     * {@link #beforerowselect} event.  If these checks are satisfied the row
     * will be selected and followed up by  firing the {@link #rowselect} and
     * {@link #selectionchange} events.
     * @param {Number} row The index of the row to select
     * @param {Boolean} keepExisting (optional) <tt>true</tt> to keep existing selections
     * @param {Boolean} preventViewNotify (optional) Specify <tt>true</tt> to
     * prevent notifying the view (disables updating the selected appearance)
     */
    selectRow : function(index, keepExisting, preventViewNotify){
        if(this.isLocked() || (index < 0 || index >= this.grid.store.getCount()) || (keepExisting && this.isSelected(index))){
            return;
        }
        var r = this.grid.store.getAt(index);
        if(r && this.fireEvent('beforerowselect', this, index, keepExisting, r) !== false){
            if(!keepExisting || this.singleSelect){
                this.clearSelections();
            }
            this.selections.add(r);
            this.last = this.lastActive = index;
            if(!preventViewNotify){
                this.grid.getView().onRowSelect(index);
            }
            if(!this.silent){
                this.fireEvent('rowselect', this, index, r);
                this.fireEvent('selectionchange', this);
            }
        }
    },

    /**
     * Deselects a row.  Before deselecting a row, checks if the selection model
     * {@link Ext.grid.AbstractSelectionModel#isLocked is locked}.
     * If this check is satisfied the row will be deselected and followed up by
     * firing the {@link #rowdeselect} and {@link #selectionchange} events.
     * @param {Number} row The index of the row to deselect
     * @param {Boolean} preventViewNotify (optional) Specify <tt>true</tt> to
     * prevent notifying the view (disables updating the selected appearance)
     */
    deselectRow : function(index, preventViewNotify){
        if(this.isLocked()){
            return;
        }
        if(this.last == index){
            this.last = false;
        }
        if(this.lastActive == index){
            this.lastActive = false;
        }
        var r = this.grid.store.getAt(index);
        if(r){
            this.selections.remove(r);
            if(!preventViewNotify){
                this.grid.getView().onRowDeselect(index);
            }
            this.fireEvent('rowdeselect', this, index, r);
            this.fireEvent('selectionchange', this);
        }
    },

    // private
    acceptsNav : function(row, col, cm){
        return !cm.isHidden(col) && cm.isCellEditable(col, row);
    },

    // private
    onEditorKey : function(field, e){
        var k = e.getKey(), 
            newCell, 
            g = this.grid, 
            last = g.lastEdit,
            ed = g.activeEditor,
            shift = e.shiftKey,
            ae, last, r, c;
            
        if(k == e.TAB){
            e.stopEvent();
            ed.completeEdit();
            if(shift){
                newCell = g.walkCells(ed.row, ed.col-1, -1, this.acceptsNav, this);
            }else{
                newCell = g.walkCells(ed.row, ed.col+1, 1, this.acceptsNav, this);
            }
        }else if(k == e.ENTER){
            if(this.moveEditorOnEnter !== false){
                if(shift){
                    newCell = g.walkCells(last.row - 1, last.col, -1, this.acceptsNav, this);
                }else{
                    newCell = g.walkCells(last.row + 1, last.col, 1, this.acceptsNav, this);
                }
            }
        }
        if(newCell){
            r = newCell[0];
            c = newCell[1];

            this.onEditorSelect(r, last.row);

            if(g.isEditor && g.editing){ // *** handle tabbing while editorgrid is in edit mode
                ae = g.activeEditor;
                if(ae && ae.field.triggerBlur){
                    // *** if activeEditor is a TriggerField, explicitly call its triggerBlur() method
                    ae.field.triggerBlur();
                }
            }
            g.startEditing(r, c);
        }
    },
    
    onEditorSelect: function(row, lastRow){
        if(lastRow != row){
            this.selectRow(row); // *** highlight newly-selected cell and update selection
        }
    },
    
    destroy : function(){
        Ext.destroy(this.rowNav);
        this.rowNav = null;
        Ext.grid.RowSelectionModel.superclass.destroy.call(this);
    }
});
/**
 * @class Ext.grid.Column
 * <p>This class encapsulates column configuration data to be used in the initialization of a
 * {@link Ext.grid.ColumnModel ColumnModel}.</p>
 * <p>While subclasses are provided to render data in different ways, this class renders a passed
 * data field unchanged and is usually used for textual columns.</p>
 */
Ext.grid.Column = Ext.extend(Ext.util.Observable, {
    /**
     * @cfg {Boolean} editable Optional. Defaults to <tt>true</tt>, enabling the configured
     * <tt>{@link #editor}</tt>.  Set to <tt>false</tt> to initially disable editing on this column.
     * The initial configuration may be dynamically altered using
     * {@link Ext.grid.ColumnModel}.{@link Ext.grid.ColumnModel#setEditable setEditable()}.
     */
    /**
     * @cfg {String} id Optional. A name which identifies this column (defaults to the column's initial
     * ordinal position.) The <tt>id</tt> is used to create a CSS <b>class</b> name which is applied to all
     * table cells (including headers) in that column (in this context the <tt>id</tt> does not need to be
     * unique). The class name takes the form of <pre>x-grid3-td-<b>id</b></pre>
     * Header cells will also receive this class name, but will also have the class <pre>x-grid3-hd</pre>
     * So, to target header cells, use CSS selectors such as:<pre>.x-grid3-hd-row .x-grid3-td-<b>id</b></pre>
     * The {@link Ext.grid.GridPanel#autoExpandColumn} grid config option references the column via this
     * unique identifier.
     */
    /**
     * @cfg {String} header Optional. The header text to be used as innerHTML
     * (html tags are accepted) to display in the Grid view.  <b>Note</b>: to
     * have a clickable header with no text displayed use <tt>'&amp;#160;'</tt>.
     */
    /**
     * @cfg {Boolean} groupable Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to disable the header menu item to group by the column selected. Defaults to <tt>true</tt>,
     * which enables the header menu group option.  Set to <tt>false</tt> to disable (but still show) the
     * group option in the header menu for the column. See also <code>{@link #groupName}</code>.
     */
    /**
     * @cfg {String} groupName Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text with which to prefix the group field value in the group header line.
     * See also {@link #groupRenderer} and
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#showGroupName showGroupName}.
     */
    /**
     * @cfg {Function} groupRenderer <p>Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the function used to format the grouping field value for display in the group
     * {@link #groupName header}.  If a <tt><b>groupRenderer</b></tt> is not specified, the configured
     * <tt><b>{@link #renderer}</b></tt> will be called; if a <tt><b>{@link #renderer}</b></tt> is also not specified
     * the new value of the group field will be used.</p>
     * <p>The called function (either the <tt><b>groupRenderer</b></tt> or <tt><b>{@link #renderer}</b></tt>) will be
     * passed the following parameters:
     * <div class="mdetail-params"><ul>
     * <li><b>v</b> : Object<p class="sub-desc">The new value of the group field.</p></li>
     * <li><b>unused</b> : undefined<p class="sub-desc">Unused parameter.</p></li>
     * <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data
     * for the row which caused group change.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">The row index of the Record which caused group change.</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">The column index of the group field.</p></li>
     * <li><b>ds</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></p>
     * <p>The function should return a string value.</p>
     */
    /**
     * @cfg {String} emptyGroupText Optional. If the grid is being rendered by an {@link Ext.grid.GroupingView}, this option
     * may be used to specify the text to display when there is an empty group value. Defaults to the
     * {@link Ext.grid.GroupingView}.{@link Ext.grid.GroupingView#emptyGroupText emptyGroupText}.
     */
    /**
     * @cfg {String} dataIndex <p><b>Required</b>. The name of the field in the
     * grid's {@link Ext.data.Store}'s {@link Ext.data.Record} definition from
     * which to draw the column's value.</p>
     */
    /**
     * @cfg {Number} width
     * Optional. The initial width in pixels of the column.
     * The width of each column can also be affected if any of the following are configured:
     * <div class="mdetail-params"><ul>
     * <li>{@link Ext.grid.GridPanel}.<tt>{@link Ext.grid.GridPanel#autoExpandColumn autoExpandColumn}</tt></li>
     * <li>{@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#forceFit forceFit}</tt>
     * <div class="sub-desc">
     * <p>By specifying <tt>forceFit:true</tt>, {@link #fixed non-fixed width} columns will be
     * re-proportioned (based on the relative initial widths) to fill the width of the grid so
     * that no horizontal scrollbar is shown.</p>
     * </div></li>
     * <li>{@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#autoFill autoFill}</tt></li>
     * <li>{@link Ext.grid.GridPanel}.<tt>{@link Ext.grid.GridPanel#minColumnWidth minColumnWidth}</tt></li>
     * <br><p><b>Note</b>: when the width of each column is determined, a space on the right side
     * is reserved for the vertical scrollbar.  The
     * {@link Ext.grid.GridView}.<tt>{@link Ext.grid.GridView#scrollOffset scrollOffset}</tt>
     * can be modified to reduce or eliminate the reserved offset.</p>
     */
    /**
     * @cfg {Boolean} sortable Optional. <tt>true</tt> if sorting is to be allowed on this column.
     * Defaults to the value of the <code>{@link Ext.grid.ColumnModel#defaultSortable}</code> property.
     * Whether local/remote sorting is used is specified in <code>{@link Ext.data.Store#remoteSort}</code>.
     */
    /**
     * @cfg {Boolean} fixed Optional. <tt>true</tt> if the column width cannot be changed.  Defaults to <tt>false</tt>.
     */
    /**
     * @cfg {Boolean} resizable Optional. <tt>false</tt> to disable column resizing. Defaults to <tt>true</tt>.
     */
    /**
     * @cfg {Boolean} menuDisabled Optional. <tt>true</tt> to disable the column menu. Defaults to <tt>false</tt>.
     */
    /**
     * @cfg {Boolean} hidden
     * Optional. <tt>true</tt> to initially hide this column. Defaults to <tt>false</tt>.
     * A hidden column {@link Ext.grid.GridPanel#enableColumnHide may be shown via the header row menu}.
     * If a column is never to be shown, simply do not include this column in the Column Model at all.
     */
    /**
     * @cfg {String} tooltip Optional. A text string to use as the column header's tooltip.  If Quicktips
     * are enabled, this value will be used as the text of the quick tip, otherwise it will be set as the
     * header's HTML title attribute. Defaults to ''.
     */
    /**
     * @cfg {Mixed} renderer
     * <p>For an alternative to specifying a renderer see <code>{@link #xtype}</code></p>
     * <p>Optional. A renderer is an 'interceptor' method which can be used transform data (value,
     * appearance, etc.) before it is rendered). This may be specified in either of three ways:
     * <div class="mdetail-params"><ul>
     * <li>A renderer function used to return HTML markup for a cell given the cell's data value.</li>
     * <li>A string which references a property name of the {@link Ext.util.Format} class which
     * provides a renderer function.</li>
     * <li>An object specifying both the renderer function, and its execution scope (<tt><b>this</b></tt>
     * reference) e.g.:<pre style="margin-left:1.2em"><code>
{
    fn: this.gridRenderer,
    scope: this
}
</code></pre></li></ul></div>
     * If not specified, the default renderer uses the raw data value.</p>
     * <p>For information about the renderer function (passed parameters, etc.), see
     * {@link Ext.grid.ColumnModel#setRenderer}. An example of specifying renderer function inline:</p><pre><code>
var companyColumn = {
   header: 'Company Name',
   dataIndex: 'company',
   renderer: function(value, metaData, record, rowIndex, colIndex, store) {
      // provide the logic depending on business rules
      // name of your own choosing to manipulate the cell depending upon
      // the data in the underlying Record object.
      if (value == 'whatever') {
          //metaData.css : String : A CSS class name to add to the TD element of the cell.
          //metaData.attr : String : An html attribute definition string to apply to
          //                         the data container element within the table
          //                         cell (e.g. 'style="color:red;"').
          metaData.css = 'name-of-css-class-you-will-define';
      }
      return value;
   }
}
     * </code></pre>
     * See also {@link #scope}.
     */
    /**
     * @cfg {String} xtype Optional. A String which references a predefined {@link Ext.grid.Column} subclass
     * type which is preconfigured with an appropriate <code>{@link #renderer}</code> to be easily
     * configured into a ColumnModel. The predefined {@link Ext.grid.Column} subclass types are:
     * <div class="mdetail-params"><ul>
     * <li><b><tt>gridcolumn</tt></b> : {@link Ext.grid.Column} (<b>Default</b>)<p class="sub-desc"></p></li>
     * <li><b><tt>booleancolumn</tt></b> : {@link Ext.grid.BooleanColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>numbercolumn</tt></b> : {@link Ext.grid.NumberColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>datecolumn</tt></b> : {@link Ext.grid.DateColumn}<p class="sub-desc"></p></li>
     * <li><b><tt>templatecolumn</tt></b> : {@link Ext.grid.TemplateColumn}<p class="sub-desc"></p></li>
     * </ul></div>
     * <p>Configuration properties for the specified <code>xtype</code> may be specified with
     * the Column configuration properties, for example:</p>
     * <pre><code>
var grid = new Ext.grid.GridPanel({
    ...
    columns: [{
        header: 'Last Updated',
        dataIndex: 'lastChange',
        width: 85,
        sortable: true,
        //renderer: Ext.util.Format.dateRenderer('m/d/Y'),
        xtype: 'datecolumn', // use xtype instead of renderer
        format: 'M/d/Y' // configuration property for {@link Ext.grid.DateColumn}
    }, {
        ...
    }]
});
     * </code></pre>
     */
    /**
     * @cfg {Object} scope Optional. The scope (<tt><b>this</b></tt> reference) in which to execute the
     * renderer.  Defaults to the Column configuration object.
     */
    /**
     * @cfg {String} align Optional. Set the CSS text-align property of the column.  Defaults to undefined.
     */
    /**
     * @cfg {String} css Optional. An inline style definition string which is applied to all table cells in the column
     * (excluding headers). Defaults to undefined.
     */
    /**
     * @cfg {Boolean} hideable Optional. Specify as <tt>false</tt> to prevent the user from hiding this column
     * (defaults to true).  To disallow column hiding globally for all columns in the grid, use
     * {@link Ext.grid.GridPanel#enableColumnHide} instead.
     */
    /**
     * @cfg {Ext.form.Field} editor Optional. The {@link Ext.form.Field} to use when editing values in this column
     * if editing is supported by the grid. See <tt>{@link #editable}</tt> also.
     */

    /**
     * @private
     * @cfg {Boolean} isColumn
     * Used by ColumnModel setConfig method to avoid reprocessing a Column
     * if <code>isColumn</code> is not set ColumnModel will recreate a new Ext.grid.Column
     * Defaults to true.
     */
    isColumn : true,

    constructor : function(config){
        Ext.apply(this, config);

        if(Ext.isString(this.renderer)){
            this.renderer = Ext.util.Format[this.renderer];
        }else if(Ext.isObject(this.renderer)){
            this.scope = this.renderer.scope;
            this.renderer = this.renderer.fn;
        }
        if(!this.scope){
            this.scope = this;
        }

        var ed = this.editor;
        delete this.editor;
        this.setEditor(ed);
        this.addEvents(
            /**
             * @event click
             * Fires when this Column is clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'click',
            /**
             * @event contextmenu
             * Fires when this Column is right clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'contextmenu',
            /**
             * @event dblclick
             * Fires when this Column is double clicked.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'dblclick',
            /**
             * @event mousedown
             * Fires when this Column receives a mousedown event.
             * @param {Column} this
             * @param {Grid} The owning GridPanel
             * @param {Number} rowIndex
             * @param {Ext.EventObject} e
             */
            'mousedown'
        );
        Ext.grid.Column.superclass.constructor.call(this);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     * Returns the event handler's status to allow cancelling of GridView's bubbling process.
     */
    processEvent : function(name, e, grid, rowIndex, colIndex){
        return this.fireEvent(name, this, grid, rowIndex, e);
    },

    /**
     * @private
     * Clean up. Remove any Editor. Remove any listeners.
     */
    destroy: function() {
        if(this.setEditor){
            this.setEditor(null);
        }
        this.purgeListeners();
    },

    /**
     * Optional. A function which returns displayable data when passed the following parameters:
     * <div class="mdetail-params"><ul>
     * <li><b>value</b> : Object<p class="sub-desc">The data value for the cell.</p></li>
     * <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     * <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     * <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container
     * element <i>within</i> the table cell (e.g. 'style="color:red;"').</p></li></ul></p></li>
     * <li><b>record</b> : Ext.data.record<p class="sub-desc">The {@link Ext.data.Record} from which the data was
     * extracted.</p></li>
     * <li><b>rowIndex</b> : Number<p class="sub-desc">Row index</p></li>
     * <li><b>colIndex</b> : Number<p class="sub-desc">Column index</p></li>
     * <li><b>store</b> : Ext.data.Store<p class="sub-desc">The {@link Ext.data.Store} object from which the Record
     * was extracted.</p></li>
     * </ul></div>
     * @property renderer
     * @type Function
     */
    renderer : function(value){
        return value;
    },

    // private
    getEditor: function(rowIndex){
        return this.editable !== false ? this.editor : null;
    },

    /**
     * Sets a new editor for this column.
     * @param {Ext.Editor/Ext.form.Field} editor The editor to set
     */
    setEditor : function(editor){
        var ed = this.editor;
        if(ed){
            if(ed.gridEditor){
                ed.gridEditor.destroy();
                delete ed.gridEditor;
            }else{
                ed.destroy();
            }
        }
        this.editor = null;
        if(editor){
            //not an instance, create it
            if(!editor.isXType){
                editor = Ext.create(editor, 'textfield');
            }
            this.editor = editor;
        }
    },

    /**
     * Returns the {@link Ext.Editor editor} defined for this column that was created to wrap the {@link Ext.form.Field Field}
     * used to edit the cell.
     * @param {Number} rowIndex The row index
     * @return {Ext.Editor}
     */
    getCellEditor: function(rowIndex){
        var ed = this.getEditor(rowIndex);
        if(ed){
            if(!ed.startEdit){
                if(!ed.gridEditor){
                    ed.gridEditor = new Ext.grid.GridEditor(ed);
                }
                ed = ed.gridEditor;
            }
        }
        return ed;
    }
});

/**
 * @class Ext.grid.BooleanColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders boolean data fields.  See the {@link Ext.grid.Column#xtype xtype}
 * config option of {@link Ext.grid.Column} for more details.</p>
 */
Ext.grid.BooleanColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} trueText
     * The string returned by the renderer when the column value is not falsy (defaults to <tt>'true'</tt>).
     */
    trueText: 'true',
    /**
     * @cfg {String} falseText
     * The string returned by the renderer when the column value is falsy (but not undefined) (defaults to
     * <tt>'false'</tt>).
     */
    falseText: 'false',
    /**
     * @cfg {String} undefinedText
     * The string returned by the renderer when the column value is undefined (defaults to <tt>'&amp;#160;'</tt>).
     */
    undefinedText: '&#160;',

    constructor: function(cfg){
        Ext.grid.BooleanColumn.superclass.constructor.call(this, cfg);
        var t = this.trueText, f = this.falseText, u = this.undefinedText;
        this.renderer = function(v){
            if(v === undefined){
                return u;
            }
            if(!v || v === 'false'){
                return f;
            }
            return t;
        };
    }
});

/**
 * @class Ext.grid.NumberColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a numeric data field according to a {@link #format} string.  See the
 * {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column} for more details.</p>
 */
Ext.grid.NumberColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} format
     * A formatting string as used by {@link Ext.util.Format#number} to format a numeric value for this Column
     * (defaults to <tt>'0,000.00'</tt>).
     */
    format : '0,000.00',
    constructor: function(cfg){
        Ext.grid.NumberColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.numberRenderer(this.format);
    }
});

/**
 * @class Ext.grid.DateColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a passed date according to the default locale, or a configured
 * {@link #format}. See the {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column}
 * for more details.</p>
 */
Ext.grid.DateColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} format
     * A formatting string as used by {@link Date#format} to format a Date for this Column
     * (defaults to <tt>'m/d/Y'</tt>).
     */
    format : 'm/d/Y',
    constructor: function(cfg){
        Ext.grid.DateColumn.superclass.constructor.call(this, cfg);
        this.renderer = Ext.util.Format.dateRenderer(this.format);
    }
});

/**
 * @class Ext.grid.TemplateColumn
 * @extends Ext.grid.Column
 * <p>A Column definition class which renders a value by processing a {@link Ext.data.Record Record}'s
 * {@link Ext.data.Record#data data} using a {@link #tpl configured} {@link Ext.XTemplate XTemplate}.
 * See the {@link Ext.grid.Column#xtype xtype} config option of {@link Ext.grid.Column} for more
 * details.</p>
 */
Ext.grid.TemplateColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String/XTemplate} tpl
     * An {@link Ext.XTemplate XTemplate}, or an XTemplate <i>definition string</i> to use to process a
     * {@link Ext.data.Record Record}'s {@link Ext.data.Record#data data} to produce a column's rendered value.
     */
    constructor: function(cfg){
        Ext.grid.TemplateColumn.superclass.constructor.call(this, cfg);
        var tpl = (!Ext.isPrimitive(this.tpl) && this.tpl.compile) ? this.tpl : new Ext.XTemplate(this.tpl);
        this.renderer = function(value, p, r){
            return tpl.apply(r.data);
        };
        this.tpl = tpl;
    }
});

/**
 * @class Ext.grid.ActionColumn
 * @extends Ext.grid.Column
 * <p>A Grid column type which renders an icon, or a series of icons in a grid cell, and offers a scoped click
 * handler for each icon. Example usage:</p>
<pre><code>
new Ext.grid.GridPanel({
    store: myStore,
    columns: [
        {
            xtype: 'actioncolumn',
            width: 50,
            items: [
                {
                    icon   : 'sell.gif',                // Use a URL in the icon config
                    tooltip: 'Sell stock',
                    handler: function(grid, rowIndex, colIndex) {
                        var rec = store.getAt(rowIndex);
                        alert("Sell " + rec.get('company'));
                    }
                },
                {
                    getClass: function(v, meta, rec) {  // Or return a class from a function
                        if (rec.get('change') < 0) {
                            this.items[1].tooltip = 'Do not buy!';
                            return 'alert-col';
                        } else {
                            this.items[1].tooltip = 'Buy stock';
                            return 'buy-col';
                        }
                    },
                    handler: function(grid, rowIndex, colIndex) {
                        var rec = store.getAt(rowIndex);
                        alert("Buy " + rec.get('company'));
                    }
                }
            ]
        }
        //any other columns here
    ]
});
</pre></code>
 * <p>The action column can be at any index in the columns array, and a grid can have any number of
 * action columns. </p>
 */
Ext.grid.ActionColumn = Ext.extend(Ext.grid.Column, {
    /**
     * @cfg {String} icon
     * The URL of an image to display as the clickable element in the column. 
     * Optional - defaults to <code>{@link Ext#BLANK_IMAGE_URL Ext.BLANK_IMAGE_URL}</code>.
     */
    /**
     * @cfg {String} iconCls
     * A CSS class to apply to the icon image. To determine the class dynamically, configure the Column with a <code>{@link #getClass}</code> function.
     */
    /**
     * @cfg {Function} handler A function called when the icon is clicked.
     * The handler is passed the following parameters:<div class="mdetail-params"><ul>
     * <li><code>grid</code> : GridPanel<div class="sub-desc">The owning GridPanel.</div></li>
     * <li><code>rowIndex</code> : Number<div class="sub-desc">The row index clicked on.</div></li>
     * <li><code>colIndex</code> : Number<div class="sub-desc">The column index clicked on.</div></li>
     * <li><code>item</code> : Object<div class="sub-desc">The clicked item (or this Column if multiple 
     * {@link #items} were not configured).</div></li>
     * <li><code>e</code> : Event<div class="sub-desc">The click event.</div></li>
     * </ul></div>
     */
    /**
     * @cfg {Object} scope The scope (<tt><b>this</b></tt> reference) in which the <code>{@link #handler}</code>
     * and <code>{@link #getClass}</code> fuctions are executed. Defaults to this Column.
     */
    /**
     * @cfg {String} tooltip A tooltip message to be displayed on hover. {@link Ext.QuickTips#init Ext.QuickTips} must have 
     * been initialized.
     */
    /**
     * @cfg {Boolean} stopSelection Defaults to <code>true</code>. Prevent grid <i>row</i> selection upon mousedown.
     */
    /**
     * @cfg {Function} getClass A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<div class="mdetail-params"><ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div>
     */
    /**
     * @cfg {Array} items An Array which may contain multiple icon definitions, each element of which may contain:
     * <div class="mdetail-params"><ul>
     * <li><code>icon</code> : String<div class="sub-desc">The url of an image to display as the clickable element 
     * in the column.</div></li>
     * <li><code>iconCls</code> : String<div class="sub-desc">A CSS class to apply to the icon image.
     * To determine the class dynamically, configure the item with a <code>getClass</code> function.</div></li>
     * <li><code>getClass</code> : Function<div class="sub-desc">A function which returns the CSS class to apply to the icon image.
     * The function is passed the following parameters:<ul>
     *     <li><b>v</b> : Object<p class="sub-desc">The value of the column's configured field (if any).</p></li>
     *     <li><b>metadata</b> : Object<p class="sub-desc">An object in which you may set the following attributes:<ul>
     *         <li><b>css</b> : String<p class="sub-desc">A CSS class name to add to the cell's TD element.</p></li>
     *         <li><b>attr</b> : String<p class="sub-desc">An HTML attribute definition string to apply to the data container element <i>within</i> the table cell
     *         (e.g. 'style="color:red;"').</p></li>
     *     </ul></p></li>
     *     <li><b>r</b> : Ext.data.Record<p class="sub-desc">The Record providing the data.</p></li>
     *     <li><b>rowIndex</b> : Number<p class="sub-desc">The row index..</p></li>
     *     <li><b>colIndex</b> : Number<p class="sub-desc">The column index.</p></li>
     *     <li><b>store</b> : Ext.data.Store<p class="sub-desc">The Store which is providing the data Model.</p></li>
     * </ul></div></li>
     * <li><code>handler</code> : Function<div class="sub-desc">A function called when the icon is clicked.</div></li>
     * <li><code>scope</code> : Scope<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the 
     * <code>handler</code> and <code>getClass</code> functions are executed. Fallback defaults are this Column's
     * configured scope, then this Column.</div></li>
     * <li><code>tooltip</code> : String<div class="sub-desc">A tooltip message to be displayed on hover. 
     * {@link Ext.QuickTips#init Ext.QuickTips} must have been initialized.</div></li>
     * </ul></div>
     */
    header: '&#160;',

    actionIdRe: /x-action-col-(\d+)/,
    
    /**
     * @cfg {String} altText The alt text to use for the image element. Defaults to <tt>''</tt>.
     */
    altText: '',

    constructor: function(cfg) {
        var me = this,
            items = cfg.items || (me.items = [me]),
            l = items.length,
            i,
            item;

        Ext.grid.ActionColumn.superclass.constructor.call(me, cfg);

//      Renderer closure iterates through items creating an <img> element for each and tagging with an identifying 
//      class name x-action-col-{n}
        me.renderer = function(v, meta) {
//          Allow a configured renderer to create initial value (And set the other values in the "metadata" argument!)
            v = Ext.isFunction(cfg.renderer) ? cfg.renderer.apply(this, arguments)||'' : '';

            meta.css += ' x-action-col-cell';
            for (i = 0; i < l; i++) {
                item = items[i];
                v += '<img alt="' + (item.altText || me.altText) + '" src="' + (item.icon || Ext.BLANK_IMAGE_URL) +
                    '" class="x-action-col-icon x-action-col-' + String(i) + ' ' + (item.iconCls || '') +
                    ' ' + (Ext.isFunction(item.getClass) ? item.getClass.apply(item.scope||this.scope||this, arguments) : '') + '"' +
                    ((item.tooltip) ? ' ext:qtip="' + item.tooltip + '"' : '') + ' />';
            }
            return v;
        };
    },

    destroy: function() {
        delete this.items;
        delete this.renderer;
        return Ext.grid.ActionColumn.superclass.destroy.apply(this, arguments);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     * Also fires any configured click handlers. By default, cancels the mousedown event to prevent selection.
     * Returns the event handler's status to allow cancelling of GridView's bubbling process.
     */
    processEvent : function(name, e, grid, rowIndex, colIndex){
        var m = e.getTarget().className.match(this.actionIdRe),
            item, fn;
        if (m && (item = this.items[parseInt(m[1], 10)])) {
            if (name == 'click') {
                (fn = item.handler || this.handler) && fn.call(item.scope||this.scope||this, grid, rowIndex, colIndex, item, e);
            } else if ((name == 'mousedown') && (item.stopSelection !== false)) {
                return false;
            }
        }
        return Ext.grid.ActionColumn.superclass.processEvent.apply(this, arguments);
    }
});

/*
 * @property types
 * @type Object
 * @member Ext.grid.Column
 * @static
 * <p>An object containing predefined Column classes keyed by a mnemonic code which may be referenced
 * by the {@link Ext.grid.ColumnModel#xtype xtype} config option of ColumnModel.</p>
 * <p>This contains the following properties</p><div class="mdesc-details"><ul>
 * <li>gridcolumn : <b>{@link Ext.grid.Column Column constructor}</b></li>
 * <li>booleancolumn : <b>{@link Ext.grid.BooleanColumn BooleanColumn constructor}</b></li>
 * <li>numbercolumn : <b>{@link Ext.grid.NumberColumn NumberColumn constructor}</b></li>
 * <li>datecolumn : <b>{@link Ext.grid.DateColumn DateColumn constructor}</b></li>
 * <li>templatecolumn : <b>{@link Ext.grid.TemplateColumn TemplateColumn constructor}</b></li>
 * </ul></div>
 */
Ext.grid.Column.types = {
    gridcolumn : Ext.grid.Column,
    booleancolumn: Ext.grid.BooleanColumn,
    numbercolumn: Ext.grid.NumberColumn,
    datecolumn: Ext.grid.DateColumn,
    templatecolumn: Ext.grid.TemplateColumn,
    actioncolumn: Ext.grid.ActionColumn
};/**
 * @class Ext.grid.RowNumberer
 * This is a utility class that can be passed into a {@link Ext.grid.ColumnModel} as a column config that provides
 * an automatic row numbering column.
 * <br>Usage:<br>
 <pre><code>
 // This is a typical column config with the first column providing row numbers
 var colModel = new Ext.grid.ColumnModel([
    new Ext.grid.RowNumberer(),
    {header: "Name", width: 80, sortable: true},
    {header: "Code", width: 50, sortable: true},
    {header: "Description", width: 200, sortable: true}
 ]);
 </code></pre>
 * @constructor
 * @param {Object} config The configuration options
 */
Ext.grid.RowNumberer = Ext.extend(Object, {
    /**
     * @cfg {String} header Any valid text or HTML fragment to display in the header cell for the row
     * number column (defaults to '').
     */
    header: "",
    /**
     * @cfg {Number} width The default width in pixels of the row number column (defaults to 23).
     */
    width: 23,
    /**
     * @cfg {Boolean} sortable True if the row number column is sortable (defaults to false).
     * @hide
     */
    sortable: false,
    
    constructor : function(config){
        Ext.apply(this, config);
        if(this.rowspan){
            this.renderer = this.renderer.createDelegate(this);
        }
    },

    // private
    fixed:true,
    hideable: false,
    menuDisabled:true,
    dataIndex: '',
    id: 'numberer',
    rowspan: undefined,

    // private
    renderer : function(v, p, record, rowIndex){
        if(this.rowspan){
            p.cellAttr = 'rowspan="'+this.rowspan+'"';
        }
        return rowIndex+1;
    }
});/**
 * @class Ext.grid.CheckboxSelectionModel
 * @extends Ext.grid.RowSelectionModel
 * A custom selection model that renders a column of checkboxes that can be toggled to select or deselect rows.
 * @constructor
 * @param {Object} config The configuration options
 */
Ext.grid.CheckboxSelectionModel = Ext.extend(Ext.grid.RowSelectionModel, {

    /**
     * @cfg {Boolean} checkOnly <tt>true</tt> if rows can only be selected by clicking on the
     * checkbox column (defaults to <tt>false</tt>).
     */
    /**
     * @cfg {String} header Any valid text or HTML fragment to display in the header cell for the
     * checkbox column.  Defaults to:<pre><code>
     * '&lt;div class="x-grid3-hd-checker">&#38;#160;&lt;/div>'</tt>
     * </code></pre>
     * The default CSS class of <tt>'x-grid3-hd-checker'</tt> displays a checkbox in the header
     * and provides support for automatic check all/none behavior on header click. This string
     * can be replaced by any valid HTML fragment, including a simple text string (e.g.,
     * <tt>'Select Rows'</tt>), but the automatic check all/none behavior will only work if the
     * <tt>'x-grid3-hd-checker'</tt> class is supplied.
     */
    header : '<div class="x-grid3-hd-checker">&#160;</div>',
    /**
     * @cfg {Number} width The default width in pixels of the checkbox column (defaults to <tt>20</tt>).
     */
    width : 20,
    /**
     * @cfg {Boolean} sortable <tt>true</tt> if the checkbox column is sortable (defaults to
     * <tt>false</tt>).
     */
    sortable : false,

    // private
    menuDisabled : true,
    fixed : true,
    hideable: false,
    dataIndex : '',
    id : 'checker',
    isColumn: true, // So that ColumnModel doesn't feed this through the Column constructor

    constructor : function(){
        Ext.grid.CheckboxSelectionModel.superclass.constructor.apply(this, arguments);
        if(this.checkOnly){
            this.handleMouseDown = Ext.emptyFn;
        }
    },

    // private
    initEvents : function(){
        Ext.grid.CheckboxSelectionModel.superclass.initEvents.call(this);
        this.grid.on('render', function(){
            Ext.fly(this.grid.getView().innerHd).on('mousedown', this.onHdMouseDown, this);
        }, this);
    },

    /**
     * @private
     * Process and refire events routed from the GridView's processEvent method.
     */
    processEvent : function(name, e, grid, rowIndex, colIndex){
        if (name == 'mousedown') {
            this.onMouseDown(e, e.getTarget());
            return false;
        } else {
            return Ext.grid.Column.prototype.processEvent.apply(this, arguments);
        }
    },

    // private
    onMouseDown : function(e, t){
        if(e.button === 0 && t.className == 'x-grid3-row-checker'){ // Only fire if left-click
            e.stopEvent();
            var row = e.getTarget('.x-grid3-row');
            if(row){
                var index = row.rowIndex;
                if(this.isSelected(index)){
                    this.deselectRow(index);
                }else{
                    this.selectRow(index, true);
                    this.grid.getView().focusRow(index);
                }
            }
        }
    },

    // private
    onHdMouseDown : function(e, t) {
        if(t.className == 'x-grid3-hd-checker'){
            e.stopEvent();
            var hd = Ext.fly(t.parentNode);
            var isChecked = hd.hasClass('x-grid3-hd-checker-on');
            if(isChecked){
                hd.removeClass('x-grid3-hd-checker-on');
                this.clearSelections();
            }else{
                hd.addClass('x-grid3-hd-checker-on');
                this.selectAll();
            }
        }
    },

    // private
    renderer : function(v, p, record){
        return '<div class="x-grid3-row-checker">&#160;</div>';
    },
    
    onEditorSelect: function(row, lastRow){
        if(lastRow != row && !this.checkOnly){
            this.selectRow(row); // *** highlight newly-selected cell and update selection
        }
    }
});