text: /*!
   * Ext JS Library 3.0.3
   * Copyright(c) 2006-2009 Ext JS, LLC
   * licensing@extjs.com
   * http://www.extjs.com/license
   */
  /**
   * @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} 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']
       * </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'],
      /**
       * @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.
       * 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 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 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 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 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'
          );
      },
  
      // 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;
          if(cs){
              for(var i = 0, len = cs.length; i < len; i++){
                  var s = cs[i];
                  var c = cm.getColumnById(s.id);
                  if(c){
                      c.hidden = s.hidden;
                      c.width = s.width;
                      var oldIndex = cm.getIndexById(s.id);
                      if(oldIndex != i){
                          cm.moveColumn(oldIndex, i);
                      }
                  }
              }
          }
          if(state.sort && this.store){
              this.store[this.store.remoteSort ? 'setDefaultSort' : 'sort'](state.sort.field, state.sort.direction);
          }
          var o = Ext.apply({}, state);
          delete o.columns;
          delete o.sort;
          Ext.grid.GridPanel.superclass.applyState.call(this, o);
      },
  
      getState : function(){
          var o = {columns: []};
          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(this.store){
              var ss = this.store.getSortState();
              if(ss){
                  o.sort = ss;
              }
          }
          return o;
      },
  
      // private
      afterRender : function(){
          Ext.grid.GridPanel.superclass.afterRender.call(this);
          var v = this.view;
          this.on('bodyresize', v.layout, v);
          v.layout();
          if(this.deferRowRender){
              v.afterRender.defer(10, this.view);
          }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){
          if(this.loadMask){
              this.loadMask.destroy();
              this.loadMask = new Ext.LoadMask(this.bwrap,
                      Ext.apply({}, {store:store}, this.initialConfig.loadMask));
          }
          this.view.initData(store, colModel);
          this.store = store;
          this.colModel = colModel;
          if(this.rendered){
              this.view.refresh(true);
          }
          this.fireEvent('reconfigure', this, store, colModel);
      },
  
      // private
      onDestroy : function(){
          if(this.rendered){
              var c = this.body;
              c.removeAllListeners();
              c.update('');
              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.fireEvent(name, e);
          var t = e.getTarget();
          var v = this.view;
          var header = v.findHeaderIndex(t);
          if(header !== false){
              this.fireEvent('header' + name, this, header, e);
          }else{
              var row = v.findRowIndex(t);
              var cell = v.findCellIndex(t);
              if(row !== false){
                  this.fireEvent('row' + name, this, row, e);
                  if(cell !== false){
                      this.fireEvent('cell' + name, this, row, cell, 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();
          var 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;
      },
  
      // private
      onResize : function(){
          Ext.grid.GridPanel.superclass.onResize.apply(this, arguments);
          if(this.viewReady){
              this.view.layout();
          }
      },
  
      /**
       * 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();
          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.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 = 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);
  };
  
  Ext.extend(Ext.grid.GridView, 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
       * Defaults to <tt>false</tt>.  Specify <tt>true</tt> to have the column widths re-proportioned
       * at <b>all times</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 <b>will</b> be resized
       * to fit the grid width. See <tt>{@link #autoFill}</tt> also.
       */
      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 {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',
      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 {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',
      
      // private
      firstRowCls: 'x-grid3-row-first',
      lastRowCls: 'x-grid3-row-last',
      rowClsRe: /(?:^|\s+)x-grid3-row-(first|last|alt)(?:\s+|$)/g,
  
      /* -------------------------------- UI Specific ----------------------------- */
  
      // private
      initTemplates : function(){
          var ts = this.templates || {};
          if(!ts.master){
              ts.master = 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>'
                      );
          }
  
          if(!ts.header){
              ts.header = new Ext.Template(
                      '<table border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
                      '<thead><tr class="x-grid3-hd-row">{cells}</tr></thead>',
                      '</table>'
                      );
          }
  
          if(!ts.hcell){
              ts.hcell = 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 class="x-grid3-sort-icon" src="', Ext.BLANK_IMAGE_URL, '" />',
                      '</div></td>'
                      );
          }
  
          if(!ts.body){
              ts.body = new Ext.Template('{rows}');
          }
  
          if(!ts.row){
              ts.row = new Ext.Template(
                      '<div class="x-grid3-row {alt}" style="{tstyle}"><table class="x-grid3-row-table" border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
                      '<tbody><tr>{cells}</tr>',
                      (this.enableRowBody ? '<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>' : ''),
                      '</tbody></table></div>'
                      );
          }
  
          if(!ts.cell){
              ts.cell = 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}" unselectable="on" {attr}>{value}</div>',
                      '</td>'
                      );
          }
  
          for(var k in ts){
              var t = ts[k];
              if(t && typeof t.compile == 'function' && !t.compiled){
                  t.disableFormats = true;
                  t.compile();
              }
          }
  
          this.templates = ts;
          this.colRe = new RegExp('x-grid3-td-([^\\s]+)', '');
      },
  
      // private
      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
      initElements : function(){
          var E = Ext.Element;
  
          var el = this.grid.getGridEl().dom.firstChild;
          var cs = el.childNodes;
  
          this.el = new E(el);
  
          this.mainWrap = new E(cs[0]);
          this.mainHd = new E(this.mainWrap.dom.firstChild);
  
          if(this.grid.hideHeaders){
              this.mainHd.setDisplayed(false);
          }
  
          this.innerHd = this.mainHd.dom.firstChild;
          this.scroller = new E(this.mainWrap.dom.childNodes[1]);
          if(this.forceFit){
              this.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
           */
          this.mainBody = new E(this.scroller.dom.firstChild);
  
          this.focusEl = new E(this.scroller.dom.childNodes[1]);
          this.focusEl.swallowEvent('click', true);
  
          this.resizeMarker = new E(cs[1]);
          this.resizeProxy = new E(cs[2]);
      },
  
      // 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);
          if(cell && (!requiredCls || this.fly(cell).hasClass(requiredCls))){
              return this.getCellIndex(cell);
          }
          return false;
      },
  
      // private
      getCellIndex : function(el){
          if(el){
              var m = el.className.match(this.colRe);
              if(m && m[1]){
                  return this.cm.getIndexById(m[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);
      },
  
      /**
       * <p>Return the index of the grid row which contains the passed HTMLElement.</p>
       * 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 r = this.findRow(el);
          return r ? r.rowIndex : false;
      },
  
      // 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 this.getRow(row).getElementsByTagName('td')[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(row, cls){
          var r = this.getRow(row);
          if(r){
              this.fly(r).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;
          for(var rowIndex = firstRow; rowIndex <= lastRow; rowIndex++){
              Ext.removeNode(bd.childNodes[firstRow]);
          }
          this.syncFocusEl(firstRow);
      },
  
      // scrolling stuff
  
      // 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(){
          this.scroller.dom.scrollTop = 0;
          this.scroller.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 mb = this.scroller.dom;
          this.innerHd.scrollLeft = mb.scrollLeft;
          this.innerHd.scrollLeft = mb.scrollLeft; // second time for IE (1/2 time first fails, other browsers ignore)
      },
  
      // private
      updateSortIcon : function(col, dir){
          var sc = this.sortClasses;
          var hds = this.mainHd.select('td').removeClass(sc);
          hds.item(col).addClass(sc[dir == 'DESC' ? 1 : 0]);
      },
  
      // private
      updateAllColumnWidths : function(){
          var tw = this.getTotalWidth(),
              clen = this.cm.getColumnCount(),
              ws = [],
              len,
              i;
          for(i = 0; i < clen; i++){
              ws[i] = this.getColumnWidth(i);
          }
          this.innerHd.firstChild.style.width = this.getOffsetWidth();
          this.innerHd.firstChild.firstChild.style.width = tw;
          this.mainBody.dom.style.width = tw;
          for(i = 0; i < clen; i++){
              var hd = this.getHeaderCell(i);
              hd.style.width = ws[i];
          }
  
          var ns = this.getRows(), row, trow;
          for(i = 0, len = ns.length; i < len; i++){
              row = ns[i];
              row.style.width = tw;
              if(row.firstChild){
                  row.firstChild.style.width = tw;
                  trow = row.firstChild.rows[0];
                  for (var j = 0; j < clen; j++) {
                     trow.childNodes[j].style.width = ws[j];
                  }
              }
          }
  
          this.onAllColumnWidthsUpdated(ws, tw);
      },
  
      // private
      updateColumnWidth : function(col, width){
          var w = this.getColumnWidth(col);
          var tw = this.getTotalWidth();
          this.innerHd.firstChild.style.width = this.getOffsetWidth();
          this.innerHd.firstChild.firstChild.style.width = tw;
          this.mainBody.dom.style.width = tw;
          var hd = this.getHeaderCell(col);
          hd.style.width = w;
  
          var ns = this.getRows(), row;
          for(var i = 0, len = ns.length; i < len; i++){
              row = ns[i];
              row.style.width = tw;
              if(row.firstChild){
                  row.firstChild.style.width = tw;
                  row.firstChild.rows[0].childNodes[col].style.width = w;
              }
          }
  
          this.onColumnWidthUpdated(col, w, tw);
      },
  
      // private
      updateColumnHidden : function(col, hidden){
          var tw = this.getTotalWidth();
          this.innerHd.firstChild.style.width = this.getOffsetWidth();
          this.innerHd.firstChild.firstChild.style.width = tw;
          this.mainBody.dom.style.width = tw;
          var display = hidden ? 'none' : '';
  
          var hd = this.getHeaderCell(col);
          hd.style.display = display;
  
          var ns = this.getRows(), row;
          for(var i = 0, len = ns.length; i < len; i++){
              row = ns[i];
              row.style.width = tw;
              if(row.firstChild){
                  row.firstChild.style.width = tw;
                  row.firstChild.rows[0].childNodes[col].style.display = display;
              }
          }
  
          this.onColumnHiddenUpdated(col, hidden, tw);
          delete this.lastViewWidth; // force recalc
          this.layout();
      },
  
      // private
      doRender : function(cs, rs, ds, startRow, colCount, stripe){
          var ts = this.templates, ct = ts.cell, rt = ts.row, last = colCount-1;
          var tstyle = 'width:'+this.getTotalWidth()+';';
          // buffers
          var buf = [], cb, c, p = {}, rp = {tstyle: tstyle}, r;
          for(var j = 0, len = rs.length; j < len; j++){
              r = rs[j]; cb = [];
              var rowIndex = (j+startRow);
              for(var i = 0; i < colCount; i++){
                  c = cs[i];
                  p.id = c.id;
                  p.css = i === 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
                  p.attr = p.cellAttr = '';
                  p.value = c.renderer(r.data[c.name], p, r, rowIndex, i, ds);
                  p.style = c.style;
                  if(Ext.isEmpty(p.value)){
                      p.value = '&#160;';
                  }
                  if(this.markDirty && r.dirty && typeof r.modified[c.name] !== 'undefined'){
                      p.css += ' x-grid3-dirty-cell';
                  }
                  cb[cb.length] = ct.apply(p);
              }
              var alt = [];
              if(stripe && ((rowIndex+1) % 2 === 0)){
                  alt[0] = 'x-grid3-row-alt';
              }
              if(r.dirty){
                  alt[1] = ' x-grid3-dirty-row';
              }
              rp.cols = colCount;
              if(this.getRowClass){
                  alt[2] = this.getRowClass(r, rowIndex, rp, ds);
              }
              rp.alt = alt.join(' ');
              rp.cells = cb.join('');
              buf[buf.length] =  rt.apply(rp);
          }
          return buf.join('');
      },
  
      // private
      processRows : function(startRow, skipStripe){
          if(!this.ds || this.ds.getCount() < 1){
              return;
          }
          var rows = this.getRows();
          skipStripe = skipStripe || !this.grid.stripeRows;
          startRow = startRow || 0;
          Ext.each(rows, function(row, idx){
              row.rowIndex = idx;
              if(!skipStripe){
                  row.className = row.className.replace(this.rowClsRe, ' ');
                  if ((idx + 1) % 2 === 0){
                      row.className += ' x-grid3-row-alt';
                  }
              }
          }, this);
          // add first/last-row classes
          if(startRow === 0){
              Ext.fly(rows[0]).addClass(this.firstRowCls);
          }
          Ext.fly(rows[rows.length - 1]).addClass(this.lastRowCls);
      },
  
      afterRender : function(){
          if(!this.ds || !this.cm){
              return;
          }
          this.mainBody.dom.innerHTML = this.renderRows() || '&#160;';
          this.processRows(0, true);
  
          if(this.deferEmptyText !== true){
              this.applyEmptyText();
          }
      },
  
      // private
      renderUI : function(){
  
          var header = this.renderHeaders();
          var body = this.templates.body.apply({rows:'&#160;'});
  
  
          var html = this.templates.master.apply({
              body: body,
              header: header,
              ostyle: 'width:'+this.getOffsetWidth()+';',
              bstyle: 'width:'+this.getTotalWidth()+';'
          });
  
          var g = this.grid;
  
          g.getGridEl().dom.innerHTML = html;
  
          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(g.enableColumnResize !== false){
              this.splitZone = new Ext.grid.GridView.SplitDragZone(g, this.mainHd.dom);
          }
  
          if(g.enableColumnMove){
              this.columnDrag = new Ext.grid.GridView.ColumnDragZone(g, this.innerHd);
              this.columnDrop = new Ext.grid.HeaderDropZone(g, this.mainHd.dom);
          }
  
          if(g.enableHdMenu !== false){
              this.hmenu = new Ext.menu.Menu({id: g.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(g.enableColumnHide !== false){
                  this.colMenu = new Ext.menu.Menu({id:g.id + '-hcols-menu'});
                  this.colMenu.on({
                      scope: this,
                      beforeshow: this.beforeColMenuShow,
                      itemclick: this.handleHdMenuClick
                  });
                  this.hmenu.add('-', {
                      itemId:'columns',
                      hideOnClick: false,
                      text: this.columnsText,
                      menu: this.colMenu,
                      iconCls: 'x-cols-icon'
                  });
              }
              this.hmenu.on('itemclick', this.handleHdMenuClick, this);
          }
  
          if(g.trackMouseOver){
              this.mainBody.on({
                  scope: this,
                  mouseover: this.onRowOver,
                  mouseout: this.onRowOut
              });
          }
  
          if(g.enableDragDrop || g.enableDrag){
              this.dragZone = new Ext.grid.GridDragZone(g, {
                  ddGroup : g.ddGroup || 'GridDD'
              });
          }
  
          this.updateHeaderSortState();
  
      },
  
      // private
      layout : function(){
          if(!this.mainBody){
              return; // not rendered
          }
          var g = this.grid;
          var c = g.getGridEl();
          var csize = c.getSize(true);
          var vw = csize.width;
  
          if(!g.hideHeaders && (vw < 20 || csize.height < 20)){ // display: none?
              return;
          }
          
          if(g.autoHeight){
              this.scroller.dom.style.overflow = 'visible';
              if(Ext.isWebKit){
                  this.scroller.dom.style.position = 'static';
              }
          }else{
              this.el.setSize(csize.width, csize.height);
  
              var hdHeight = this.mainHd.getHeight();
              var vh = csize.height - (hdHeight);
  
              this.scroller.setSize(vw, vh);
              if(this.innerHd){
                  this.innerHd.style.width = (vw)+'px';
              }
          }
          if(this.forceFit){
              if(this.lastViewWidth != vw){
                  this.fitColumns(false, false);
                  this.lastViewWidth = vw;
              }
          }else {
              this.autoExpand();
              this.syncHeaderScroll();
          }
          this.onLayout(vw, vh);
      },
  
      // 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';
      },
      
      getScrollOffset: function(){
          return Ext.num(this.scrollOffset, Ext.getScrollBarWidth());
      },
  
      // private
      renderHeaders : function(){
          var cm = this.cm, 
              ts = this.templates,
              ct = ts.hcell,
              cb = [], 
              p = {},
              len = cm.getColumnCount(),
              last = len - 1;
              
          for(var i = 0; i < len; i++){
              p.id = cm.getColumnId(i);
              p.value = cm.getColumnHeader(i) || '';
              p.style = this.getColumnStyle(i, true);
              p.tooltip = this.getColumnTooltip(i);
              p.css = i === 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
              if(cm.config[i].align == 'right'){
                  p.istyle = 'padding-right:16px';
              } else {
                  delete p.istyle;
              }
              cb[cb.length] = ct.apply(p);
          }
          return ts.header.apply({cells: cb.join(''), tstyle:'width:'+this.getTotalWidth()+';'});
      },
  
      // private
      getColumnTooltip : function(i){
          var tt = this.cm.getColumnTooltip(i);
          if(tt){
              if(Ext.QuickTips.isEnabled()){
                  return 'ext:qtip="'+tt+'"';
              }else{
                  return 'title="'+tt+'"';
              }
          }
          return '';
      },
  
      // private
      beforeUpdate : function(){
          this.grid.stopEditing(true);
      },
  
      // private
      updateHeaders : function(){
          this.innerHd.firstChild.innerHTML = this.renderHeaders();
          this.innerHd.firstChild.style.width = this.getOffsetWidth();
          this.innerHd.firstChild.firstChild.style.width = this.getTotalWidth();
      },
  
      /**
       * 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));
          if(Ext.isGecko){
              this.focusEl.focus();
          }else{
              this.focusEl.focus.defer(1, this.focusEl);
          }
      },
  
      resolveCell : function(row, col, hscroll){
          if(typeof row != "number"){
              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),
              cm = this.cm,
              colCount = cm.getColumnCount(),
              cellEl;
          if(!(hscroll === false && col === 0)){
              while(col < colCount && cm.isHidden(col)){
                  col++;
              }
              cellEl = this.getCell(row, col);
          }
  
          return {row: rowEl, cell: cellEl};
      },
  
      getResolvedXY : function(resolved){
          if(!resolved){
              return null;
          }
          var s = this.scroller.dom, c = resolved.cell, r = resolved.row;
          return c ? Ext.fly(c).getXY() : [this.el.getX(), Ext.fly(r).getY()];
      },
  
      syncFocusEl : function(row, col, hscroll){
          var xy = row;
          if(!Ext.isArray(xy)){
              row = Math.min(row, Math.max(0, this.getRows().length-1));
              xy = this.getResolvedXY(this.resolveCell(row, col, hscroll));
          }
          this.focusEl.setXY(xy||this.scroller.getXY());
      },
  
      ensureVisible : function(row, col, hscroll){
          var resolved = this.resolveCell(row, col, hscroll);
          if(!resolved || !resolved.row){
              return;
          }
  
          var rowEl = resolved.row, 
              cellEl = resolved.cell,
              c = this.scroller.dom,
              ctop = 0,
              p = rowEl, 
              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);
              var cright = cleft + cellEl.offsetWidth;
  
              var sleft = parseInt(c.scrollLeft, 10);
              var 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.refresh();
          }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.fireEvent('rowsinserted', this, firstRow, lastRow);
                  this.processRows(firstRow);
              }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
      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
      getColumnStyle : function(col, isHeader){
          var style = !isHeader ? (this.cm.config[col].css || '') : '';
          style += 'width:'+this.getColumnWidth(col)+';';
          if(this.cm.isHidden(col)){
              style += 'display:none;';
          }
          var align = this.cm.config[col].align;
          if(align){
              style += 'text-align:'+align+';';
          }
          return style;
      },
  
      // private
      getColumnWidth : function(col){
          var w = this.cm.getColumnWidth(col);
          if(typeof w == 'number'){
              return (Ext.isBorderBox || (Ext.isWebKit && !Ext.isSafari2) ? w : (w - this.borderWidth > 0 ? w - this.borderWidth : 0)) + 'px';
          }
          return w;
      },
  
      // private
      getTotalWidth : function(){
          return this.cm.getTotalWidth()+'px';
      },
  
      // private
      fitColumns : function(preventRefresh, onlyExpand, omitColumn){
          var cm = this.cm, i;
          var tw = cm.getTotalWidth(false);
          var aw = this.grid.getGridEl().getWidth(true)-this.getScrollOffset();
  
          if(aw < 20){ // not initialized, so don't screw up the default widths
              return;
          }
          var extra = aw - tw;
  
          if(extra === 0){
              return false;
          }
  
          var vc = cm.getColumnCount(true);
          var ac = vc-(typeof omitColumn == 'number' ? 1 : 0);
          if(ac === 0){
              ac = 1;
              omitColumn = undefined;
          }
          var colCount = cm.getColumnCount();
          var cols = [];
          var extraCol = 0;
          var width = 0;
          var w;
          for (i = 0; i < colCount; i++){
              if(!cm.isHidden(i) && !cm.isFixed(i) && i !== omitColumn){
                  w = cm.getColumnWidth(i);
                  cols.push(i);
                  extraCol = i;
                  cols.push(w);
                  width += w;
              }
          }
          var frac = (aw - cm.getTotalWidth())/width;
          while (cols.length){
              w = cols.pop();
              i = cols.pop();
              cm.setColumnWidth(i, Math.max(this.grid.minColumnWidth, Math.floor(w + w*frac)), true);
          }
  
          if((tw = cm.getTotalWidth(false)) > aw){
              var adjustCol = ac != vc ? omitColumn : extraCol;
               cm.setColumnWidth(adjustCol, Math.max(1,
                       cm.getColumnWidth(adjustCol)- (tw-aw)), true);
          }
  
          if(preventRefresh !== true){
              this.updateAllColumnWidths();
          }
  
  
          return true;
      },
  
      // private
      autoExpand : function(preventUpdate){
          var g = this.grid, cm = this.cm;
          if(!this.userResized && g.autoExpandColumn){
              var tw = cm.getTotalWidth(false);
              var aw = this.grid.getGridEl().getWidth(true)-this.getScrollOffset();
              if(tw != aw){
                  var ci = cm.getIndexById(g.autoExpandColumn);
                  var currentWidth = cm.getColumnWidth(ci);
                  var cw = Math.min(Math.max(((aw-tw)+currentWidth), g.autoExpandMin), g.autoExpandMax);
                  if(cw != currentWidth){
                      cm.setColumnWidth(ci, cw, true);
                      if(preventUpdate !== true){
                          this.updateColumnWidth(ci, cw);
                      }
                  }
              }
          }
      },
  
      // private
      getColumnData : function(){
          // build a map for all the columns
          var cs = [], cm = this.cm, colCount = cm.getColumnCount();
          for(var i = 0; i < colCount; i++){
              var name = cm.getDataIndex(i);
              cs[i] = {
                  name : (typeof name == 'undefined' ? this.ds.fields.get(i).name : name),
                  renderer : cm.getRenderer(i),
                  id : cm.getColumnId(i),
                  style : this.getColumnStyle(i)
              };
          }
          return cs;
      },
  
      // private
      renderRows : function(startRow, endRow){
          // pull in all the crap needed to render rows
          var g = this.grid, cm = g.colModel, ds = g.store, stripe = g.stripeRows;
          var colCount = cm.getColumnCount();
  
          if(ds.getCount() < 1){
              return '';
          }
  
          var cs = this.getColumnData();
  
          startRow = startRow || 0;
          endRow = typeof endRow == "undefined"? ds.getCount()-1 : endRow;
  
          // records to render
          var rs = ds.getRange(startRow, endRow);
  
          return this.doRender(cs, rs, ds, startRow, colCount, stripe);
      },
  
      // private
      renderBody : function(){
          var markup = this.renderRows() || '&#160;';
          return this.templates.body.apply({rows: markup});
      },
  
      // private
      refreshRow : function(record){
          var ds = this.ds, index;
          if(typeof record == 'number'){
              index = record;
              record = ds.getAt(index);
              if(!record){
                  return;
              }
          }else{
              index = ds.indexOf(record);
              if(index < 0){
                  return;
              }
          }
          this.insertRows(ds, index, index, true);
          this.getRow(index).rowIndex = index;
          this.onRemove(ds, record, index+1, true);
          this.fireEvent('rowupdated', this, index, 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
      applyEmptyText : function(){
          if(this.emptyText && !this.hasRows()){
              this.mainBody.update('<div class="x-grid-empty">' + this.emptyText + '</div>');
          }
      },
  
      // private
      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
      destroy : function(){
          if(this.colMenu){
              Ext.menu.MenuMgr.unregister(this.colMenu);
              this.colMenu.destroy();
              delete this.colMenu;
          }
          if(this.hmenu){
              Ext.menu.MenuMgr.unregister(this.hmenu);
              this.hmenu.destroy();
              delete this.hmenu;
          }
  
          this.initData(null, null);
          this.purgeListeners();
          Ext.fly(this.innerHd).un("click", this.handleHdDown, this);
  
          if(this.grid.enableColumnMove){
              Ext.destroy(
                  this.columnDrag.el,
                  this.columnDrag.proxy.ghost,
                  this.columnDrag.proxy.el,
                  this.columnDrop.el,
                  this.columnDrop.proxyTop,
                  this.columnDrop.proxyBottom,
                  this.columnDrag.dragData.ddel,
                  this.columnDrag.dragData.header
              );
              if (this.columnDrag.proxy.anim) {
                  Ext.destroy(this.columnDrag.proxy.anim);
              }
              delete this.columnDrag.proxy.ghost;
              delete this.columnDrag.dragData.ddel;
              delete this.columnDrag.dragData.header;
              this.columnDrag.destroy();
              delete Ext.dd.DDM.locationCache[this.columnDrag.id];
              delete this.columnDrag._domRef;
  
              delete this.columnDrop.proxyTop;
              delete this.columnDrop.proxyBottom;
              this.columnDrop.destroy();
              delete Ext.dd.DDM.locationCache["gridHeader" + this.grid.getGridEl().id];
              delete this.columnDrop._domRef;
              delete Ext.dd.DDM.ids[this.columnDrop.ddGroup];
          }
  
          if (this.splitone){ // enableColumnResize
              this.splitone.destroy();
              delete this.splitone._domRef;
              delete Ext.dd.DDM.ids["gridSplitters" + this.grid.getGridEl().id];
          }
  
          Ext.fly(this.innerHd).removeAllListeners();
          Ext.removeNode(this.innerHd);
          delete this.innerHd;
  
          Ext.destroy(
              this.el,
              this.mainWrap,
              this.mainHd,
              this.scroller,
              this.mainBody,
              this.focusEl,
              this.resizeMarker,
              this.resizeProxy,
              this.activeHdBtn,
              this.dragZone,
              this.splitZone,
              this._flyweight
          );
  
          delete this.grid.container;
  
          if(this.dragZone){
              this.dragZone.destroy();
          }
  
          Ext.dd.DDM.currentTarget = null;
          delete Ext.dd.DDM.locationCache[this.grid.getGridEl().id];
  
          Ext.EventManager.removeResizeListener(this.onWindowResize, this);
      },
  
      // 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, {single: true}); 
              }else{ 
                  this.fitColumns(true, true); 
              }
          }else if(this.forceFit){
              this.fitColumns(true, false);
          }else if(this.grid.autoExpandColumn){
              this.autoExpand(true);
          }
  
          this.renderUI();
      },
  
      /* --------------------------------- Model Events and Handlers --------------------------------*/
      // private
      initData : function(ds, cm){
          if(this.ds){
              this.ds.un('load', this.onLoad, this);
              this.ds.un('datachanged', this.onDataChange, this);
              this.ds.un('add', this.onAdd, this);
              this.ds.un('remove', this.onRemove, this);
              this.ds.un('update', this.onUpdate, this);
              this.ds.un('clear', this.onClear, this);
              if(this.ds !== ds && this.ds.autoDestroy){
                  this.ds.destroy();
              }
          }
          if(ds){
              ds.on({
                  scope: this,
                  load: this.onLoad,
                  datachanged: this.onDataChange,
                  add: this.onAdd,
                  remove: this.onRemove,
                  update: this.onUpdate,
                  clear: this.onClear
              });
          }
          this.ds = ds;
  
          if(this.cm){
              this.cm.un('configchange', this.onColConfigChange, this);
              this.cm.un('widthchange', this.onColWidthChange, this);
              this.cm.un('headerchange', this.onHeaderChange, this);
              this.cm.un('hiddenchange', this.onHiddenChange, this);
              this.cm.un('columnmoved', this.onColumnMove, this);
          }
          if(cm){
              delete this.lastViewWidth;
              cm.on({
                  scope: this,
                  configchange: this.onColConfigChange,
                  widthchange: this.onColWidthChange,
                  headerchange: this.onHeaderChange,
                  hiddenchange: this.onHiddenChange,
                  columnmoved: this.onColumnMove
              });
          }
          this.cm = cm;
      },
  
      // private
      onDataChange : function(){
          this.refresh();
          this.updateHeaderSortState();
          this.syncFocusEl(0);
      },
  
      // private
      onClear : function(){
          this.refresh();
          this.syncFocusEl(0);
      },
  
      // private
      onUpdate : function(ds, record){
          this.refreshRow(record);
      },
  
      // private
      onAdd : function(ds, records, index){
          this.insertRows(ds, index, index + (records.length-1));
      },
  
      // private
      onRemove : function(ds, 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
      onLoad : function(){
          this.scrollToTop.defer(Ext.isGecko ? 1 : 0, this);
      },
  
      // 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;
          var s = this.getScrollState();
          this.refresh(true);
          this.restoreScroll(s);
          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 : function(){
      },
  
      // private
      onHeaderClick : function(g, index){
          if(this.headersDisabled || !this.cm.isSortable(index)){
              return;
          }
          g.stopEditing(true);
          g.store.sort(this.cm.getDataIndex(index));
      },
  
      // private
      onRowOver : function(e, t){
          var row;
          if((row = this.findRowIndex(t)) !== false){
              this.addRowClass(row, 'x-grid3-row-over');
          }
      },
  
      // private
      onRowOut : function(e, t){
          var row;
          if((row = this.findRowIndex(t)) !== false && !e.within(this.getRow(row), true)){
              this.removeRowClass(row, 'x-grid3-row-over');
          }
      },
  
      // private
      handleWheel : function(e){
          e.stopPropagation();
      },
  
      // 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
      onColumnSplitterMoved : function(i, w){
          this.userResized = true;
          var cm = this.grid.colModel;
          cm.setColumnWidth(i, w, true);
  
          if(this.forceFit){
              this.fitColumns(true, false, i);
              this.updateAllColumnWidths();
          }else{
              this.updateColumnWidth(i, w);
              this.syncHeaderScroll();
          }
  
          this.grid.fireEvent('columnresize', i, w);
      },
  
      // private
      handleHdMenuClick : function(item){
          var index = this.hdCtxIndex,
              cm = this.cm, 
              ds = this.ds,
              id = item.getItemId();
          switch(id){
              case 'asc':
                  ds.sort(cm.getDataIndex(index), 'ASC');
                  break;
              case 'desc':
                  ds.sort(cm.getDataIndex(index), 'DESC');
                  break;
              default:
                  index = cm.getIndexById(id.substr(4));
                  if(index != -1){
                      if(item.checked && cm.getColumnsBy(this.isHideableColumn, this).length <= 1){
                          this.onDenyColumnHide();
                          return false;
                      }
                      cm.setHidden(index, item.checked);
                  }
          }
          return true;
      },
  
      // private
      isHideableColumn : function(c){
          return !c.hidden && !c.fixed;
      },
  
      // private
      beforeColMenuShow : function(){
          var cm = this.cm,  colCount = cm.getColumnCount();
          this.colMenu.removeAll();
          for(var i = 0; i < colCount; i++){
              if(cm.config[i].fixed !== true && cm.config[i].hideable !== false){
                  this.colMenu.add(new Ext.menu.CheckItem({
                      itemId: 'col-'+cm.getColumnId(i),
                      text: cm.getColumnHeader(i),
                      checked: !cm.isHidden(i),
                      hideOnClick:false,
                      disabled: cm.config[i].hideable === false
                  }));
              }
          }
      },
  
      // private
      handleHdDown : function(e, t){
          if(Ext.fly(t).hasClass('x-grid3-hd-btn')){
              e.stopEvent();
              var hd = this.findHeaderCell(t);
              Ext.fly(hd).addClass('x-grid3-hd-menu-open');
              var index = this.getCellIndex(hd);
              this.hdCtxIndex = index;
              var ms = this.hmenu.items, cm = this.cm;
              ms.get('asc').setDisabled(!cm.isSortable(index));
              ms.get('desc').setDisabled(!cm.isSortable(index));
              this.hmenu.on('hide', function(){
                  Ext.fly(hd).removeClass('x-grid3-hd-menu-open');
              }, this, {single:true});
              this.hmenu.show(t, 'tl-bl?');
          }
      },
  
      // private
      handleHdOver : function(e, t){
          var hd = this.findHeaderCell(t);
          if(hd && !this.headersDisabled){
              this.activeHdRef = t;
              this.activeHdIndex = this.getCellIndex(hd);
              var fly = this.fly(hd);
              this.activeHdRegion = fly.getRegion();
              if(!this.cm.isMenuDisabled(this.activeHdIndex)){
                  fly.addClass('x-grid3-hd-over');
                  this.activeHdBtn = fly.child('.x-grid3-hd-btn');
                  if(this.activeHdBtn){
                      this.activeHdBtn.dom.style.height = (hd.firstChild.offsetHeight-1)+'px';
                  }
              }
          }
      },
  
      // private
      handleHdMove : function(e, t){
          var hd = this.findHeaderCell(this.activeHdRef);
          if(hd && !this.headersDisabled){
              var hw = this.splitHandleWidth || 5,
                  r = this.activeHdRegion,
                  x = e.getPageX(),
                  ss = hd.style,
                  cur = '';
              if(this.grid.enableColumnResize !== false){
                  if(x - r.left <= hw && this.cm.isResizable(this.activeHdIndex-1)){
                      cur = Ext.isAir ? 'move' : Ext.isWebKit ? 'e-resize' : 'col-resize'; // col-resize not always supported
                  }else if(r.right - x <= (!this.activeHdBtn ? hw : 2) && this.cm.isResizable(this.activeHdIndex)){
                      cur = Ext.isAir ? 'move' : Ext.isWebKit ? 'w-resize' : 'col-resize';
                  }
              }
              ss.cursor = cur;
          }
      },
  
      // private
      handleHdOut : function(e, t){
          var hd = this.findHeaderCell(t);
          if(hd && (!Ext.isIE || !e.within(hd, true))){
              this.activeHdRef = null;
              this.fly(hd).removeClass('x-grid3-hd-over');
              hd.style.cursor = '';
          }
      },
  
      // private
      hasRows : function(){
          var fc = this.mainBody.dom.firstChild;
          return fc && fc.nodeType == 1 && fc.className != 'x-grid-empty';
      },
  
      // back compat
      bind : function(d, c){
          this.initData(d, c);
      }
  });
  
  
  // private
  // This is a support class used internally by the Grid components
  Ext.grid.GridView.SplitDragZone = 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;
  };
  Ext.extend(Ext.grid.GridView.SplitDragZone, Ext.dd.DDProxy, {
  
      b4StartDrag : function(x, y){
          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);
          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 t = this.view.findHeaderCell(e.getTarget());
          if(t){
              var xy = this.view.fly(t).getXY(), x = xy[0], y = xy[1];
              var exy = e.getXY(), ex = exy[0];
              var 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;
          var endX = Math.max(this.minX, e.getPageX());
          var diff = endX - this.startPos;
          v.onColumnSplitterMoved(this.cellIndex, this.cm.getColumnWidth(this.cellIndex)+diff);
          setTimeout(function(){
              v.headersDisabled = false;
          }, 50);
      },
  
      autoOffset : function(){
          this.setDelta(0,0);
      }
  });
  // private
  // This is a support class used internally by the Grid components
  Ext.grid.HeaderDragZone = 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;
  };
  Ext.extend(Ext.grid.HeaderDragZone, Ext.dd.DragZone, {
      maxDragWidth: 120,
      getDragData : function(e){
          var t = Ext.lib.Event.getTarget(e);
          var h = this.view.findHeaderCell(t);
          if(h){
              return {ddel: h.firstChild, header:h};
          }
          return false;
      },
  
      onInitDrag : function(e){
          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(){
          var v = this.view;
          setTimeout(function(){
              v.headersDisabled = false;
          }, 50);
      },
  
      afterInvalidDrop : function(){
          var v = this.view;
          setTimeout(function(){
              v.headersDisabled = false;
          }, 50);
      }
  });
  
  // private
  // This is a support class used internally by the Grid components
  Ext.grid.HeaderDropZone = 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);
  };
  Ext.extend(Ext.grid.HeaderDropZone, Ext.dd.DropZone, {
      proxyOffsets : [-4, -9],
      fly: Ext.Element.fly,
  
      getTargetFromEvent : function(e){
          var t = Ext.lib.Event.getTarget(e);
          var 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);
          var r = Ext.lib.Dom.getRegion(n.firstChild);
          var 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;
              var x = Ext.lib.Event.getPageX(e);
              var r = Ext.lib.Dom.getRegion(n.firstChild);
              var pt = (r.right - x) <= ((r.right-r.left)/2) ? "after" : "before";
              var oldIndex = this.view.getCellIndex(h);
              var 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 = function(grid, hd){
      Ext.grid.GridView.ColumnDragZone.superclass.constructor.call(this, grid, hd, null);
      this.proxy.el.addClass('x-grid3-col-dd');
  };
  
  Ext.extend(Ext.grid.GridView.ColumnDragZone, Ext.grid.HeaderDragZone, {
      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 = 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;
  };
  Ext.extend(Ext.grid.SplitDragZone, Ext.dd.DDProxy, {
      fly: Ext.Element.fly,
  
      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';
  };
  
  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">An Array of the selected Records which are being dragged from the GridPanel.</div></li>
       * </ul></p>
       */
      getDragData : function(e){
          var t = Ext.lib.Event.getTarget(e);
          var rowIndex = this.view.findRowIndex(t);
          if(rowIndex !== false){
              var sm = this.grid.selModel;
              if(!sm.isSelected(rowIndex) || e.hasModifier()){
                  sm.handleMouseDown(this.grid, rowIndex, e);
              }
              return {grid: this.grid, ddel: this.ddel, rowIndex: rowIndex, selections:sm.getSelections()};
          }
          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 = 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);
  };
  Ext.extend(Ext.grid.ColumnModel, 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>.
       */
  
      /**
       * 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.editor){
                      c.editor.destroy();
                  }
              }
          }
  
          // 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(typeof c.id == 'undefined'){
                  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 c = this.config[oldIndex];
          this.config.splice(oldIndex, 1);
          this.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){
          if(visibleOnly === true){
              var c = 0;
              for(var i = 0, len = this.config.length; i < len; i++){
                  if(!this.isHidden(i)){
                      c++;
                  }
              }
              return c;
          }
          return this.config.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
       * @param {Object} scope (optional)
       * @return {Array} result
       */
      getColumnsBy : function(fn, scope){
          var r = [];
          for(var i = 0, len = this.config.length; i < len; i++){
              var c = this.config[i];
              if(fn.call(scope||this, c, i) === true){
                  r[r.length] = c;
              }
          }
          return r;
      },
  
      /**
       * 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){
          if(!this.config[col].renderer){
              return Ext.grid.ColumnModel.defaultRenderer;
          }
          return this.config[col].renderer;
      },
  
      /**
       * 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){
          return this.config[col].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){
          return (this.config[colIndex].editable || (typeof this.config[colIndex].editable == "undefined" && this.config[colIndex].editor)) ? true : false;
      },
  
      /**
       * 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){
          Ext.destroy(this.config[col].editor);
          this.config[col].editor = editor;
      },
  
      /**
       * Destroys this column model by purging any event listeners, and removing any editors.
       */
      destroy : function(){
          for(var i = 0, c = this.config, len = c.length; i < len; i++){
              Ext.destroy(c[i].editor);
          }
          this.purgeListeners();
      }
  });
  
  // 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 = function(){
      this.locked = false;
      Ext.grid.AbstractSelectionModel.superclass.constructor.call(this);
  };
  
  Ext.extend(Ext.grid.AbstractSelectionModel, Ext.util.Observable,  {
      /**
       * The GridPanel for which this SelectionModel is handling selection. Read-only.
       * @type Object
       * @property grid
       */
  
      /** @ignore Called by the grid automatically. Do not call directly. */
      init : function(grid){
          this.grid = grid;
          this.initEvents();
      },
  
      /**
       * Locks the selections.
       */
      lock : function(){
          this.locked = true;
      },
  
      /**
       * Unlocks the selections.
       */
      unlock : function(){
          this.locked = false;
      },
  
      /**
       * Returns true if the selections are locked.
       * @return {Boolean}
       */
      isLocked : function(){
          return this.locked;
      },
      
      destroy: function(){
          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 = 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);
  };
  
  Ext.extend(Ext.grid.RowSelectionModel, 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,
  
      /**
       * @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' : function(e){
                  if(!e.shiftKey || this.singleSelect){
                      this.selectPrevious(false);
                  }else if(this.last !== false && this.lastActive !== false){
                      var last = this.last;
                      this.selectRange(this.last,  this.lastActive-1);
                      this.grid.getView().focusRow(this.lastActive);
                      if(last !== false){
                          this.last = last;
                      }
                  }else{
                      this.selectFirstRow();
                  }
              },
              'down' : function(e){
                  if(!e.shiftKey || this.singleSelect){
                      this.selectNext(false);
                  }else if(this.last !== false && this.lastActive !== false){
                      var last = this.last;
                      this.selectRange(this.last,  this.lastActive+1);
                      this.grid.getView().focusRow(this.lastActive);
                      if(last !== false){
                          this.last = last;
                      }
                  }else{
                      this.selectFirstRow();
                  }
              },
              scope: this
          });
  
          this.grid.getView().on({
              scope: this,
              refresh: this.onRefresh,
              rowupdated: this.onRowUpdated,
              rowremoved: this.onRemove
          });
      },
  
      // private
      onRefresh : function(){
          var ds = this.grid.store, index;
          var s = this.getSelections();
          this.clearSelections(true);
          for(var i = 0, len = s.length; i < len; i++){
              var r = s[i];
              if((index = ds.indexOfId(r.id)) != -1){
                  this.selectRow(index, true);
              }
          }
          if(s.length != this.selections.getCount()){
              this.fireEvent('selectionchange', this);
          }
      },
  
      // 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;
          for(var i = 0, len = records.length; 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
       * @param {Object} scope (optional)
       * @return {Boolean} true if all selections were iterated
       */
      each : function(fn, scope){
          var s = this.getSelections();
          for(var i = 0, len = s.length; 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;
              var 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);
              }
              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
      restoreLast : function(){
          if(this._last){
              this.last = this._last;
          }
      },
  
      // 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,
              ae, last, r, c;
          var shift = e.shiftKey;
          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];
  
              if(last.row != r){
                  this.selectRow(r); // *** highlight newly-selected cell and update selection
              }
  
              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);
          }
      },
      
      destroy : function(){
          if(this.rowNav){
              this.rowNav.disable();
              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 = 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;
      }
      this.renderer = this.renderer.createDelegate(this.scope || config);
  
      if(this.editor){
          this.editor = Ext.create(this.editor, 'textfield');
      }
  };
  
  Ext.grid.Column.prototype = {
      /**
       * @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>'&#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,
  
      /**
       * 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){
          if(Ext.isString(value) && value.length < 1){
              return '&#160;';
          }
          return value;
      },
  
      // private
      getEditor: function(rowIndex){
          return this.editable !== false ? this.editor : null;
      },
  
      /**
       * 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 editor = this.getEditor(rowIndex);
          if(editor){
              if(!editor.startEdit){
                  if(!editor.gridEditor){
                      editor.gridEditor = new Ext.grid.GridEditor(editor);
                  }
                  return editor.gridEditor;
              }else if(editor.startEdit){
                  return editor;
              }
          }
          return null;
      }
  };
  
  /**
   * @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 falsey (defaults to <tt>'true'</tt>).
       */
      trueText: 'true',
      /**
       * @cfg {String} falseText
       * The string returned by the renderer when the column value is falsey (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>'&#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.isObject(this.tpl) ? this.tpl : new Ext.XTemplate(this.tpl);
          this.renderer = function(value, p, r){
              return tpl.apply(r.data);
          };
          this.tpl = tpl;
      }
  });
  
  /*
   * @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
  };/**
   * @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 = function(config){
      Ext.apply(this, config);
      if(this.rowspan){
          this.renderer = this.renderer.createDelegate(this);
      }
  };
  
  Ext.grid.RowNumberer.prototype = {
      /**
       * @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,
  
      // private
      fixed:true,
      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,
      dataIndex : '',
      id : 'checker',
  
      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(){
              var view = this.grid.getView();
              view.mainBody.on('mousedown', this.onMouseDown, this);
              Ext.fly(view.innerHd).on('mousedown', this.onHdMouseDown, this);
  
          }, this);
      },
  
      // 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);
                  }
              }
          }
      },
  
      // 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>';
      }
  });