text: /*
   * Ext JS Library 3.0 Pre-alpha
   * Copyright(c) 2006-2008, Ext JS, LLC.
   * licensing@extjs.com
   * 
   * http://extjs.com/license
   */
  
  /**
   * @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>19</tt> pixels).
       */
      scrollOffset : 19,
      /**
       * @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',
  
      /* -------------------------------- 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(ed){
          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);
      },
  
      // private
      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 {Element} el The target element
   * @return The row element, or null if the target element is not within a row of this GridView.
   */
      findRow : function(el){
          if(!el){
              return false;
          }
          return this.fly(el).findParent(this.rowSelector, this.rowSelectorDepth);
      },
  
  /**
   * Return the index of the grid row which contains the passed element.
   * @param {Element} el The target element
   * @return 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 &lt;TR> HtmlElement which represents a Grid row for the specified index.
   * @param {Number} index The row index
   * @return {HtmlElement} The &lt;TR> element.
   */
      getRow : function(row){
          return this.getRows()[row];
      },
  
  /**
   * Returns the grid's &lt;TD> 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 &lt;TD> at the specified coordinates.
   */
      getCell : function(row, col){
          return this.getRow(row).getElementsByTagName('td')[col];
      },
  
  /**
   * Return the &lt;TD> HtmlElement which represents the Grid's header cell for the specified column index.
   * @param {Number} index The column index
   * @return {HtmlElement} The &lt;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();
          var clen = this.cm.getColumnCount();
          var ws = [];
          for(var 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(var i = 0; i < clen; i++){
              var hd = this.getHeaderCell(i);
              hd.style.width = ws[i];
          }
  
          var ns = this.getRows(), row, trow;
          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;
                  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(p.value == undefined || 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;
          }
          skipStripe = skipStripe || !this.grid.stripeRows;
          startRow = startRow || 0;
          var rows = this.getRows();
          var cls = ' x-grid3-row-alt ';
          rows[0].className += ' x-grid3-row-first';
          rows[rows.length - 1].className += ' x-grid3-row-last';
          for(var i = startRow, len = rows.length; i < len; i++){
              var row = rows[i];
              row.rowIndex = i;
              if(!skipStripe){
                  var isAlt = ((i+1) % 2 == 0);
                  var hasAlt = (' '+row.className + ' ').indexOf(cls) != -1;
                  if(isAlt == hasAlt){
                      continue;
                  }
                  if(isAlt){
                      row.className += " x-grid3-row-alt";
                  }else{
                      row.className = row.className.replace("x-grid3-row-alt", "");
                  }
              }
          }
      },
  
      afterRender : function(){
          if(!this.ds || !this.cm){
              return;
          }
          this.mainBody.dom.innerHTML = this.renderRows() || '&nbsp;';
          this.processRows(0, true);
  
          if(this.deferEmptyText !== true){
              this.applyEmptyText();
          }
      },
  
      // private
      renderUI : function(){
  
          var header = this.renderHeaders();
          var body = this.templates.body.apply({rows:'&nbsp;'});
  
  
          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("mouseover", this.handleHdOver, this);
          this.mainHd.on("mouseout", this.handleHdOut, this);
          this.mainHd.on("mousemove", this.handleHdMove, this);
  
          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("beforeshow", this.beforeColMenuShow, this);
                  this.colMenu.on("itemclick", this.handleHdMenuClick, this);
                  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("mouseover", this.onRowOver, this);
               this.mainBody.on("mouseout", this.onRowOut, this);
          }
  
          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(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.scrollOffset) + 'px';
      },
  
      // private
      renderHeaders : function(){
          var cm = this.cm, ts = this.templates;
          var ct = ts.hcell;
  
          var cb = [], p = {};
          var len = cm.getColumnCount();
          var 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), cellEl;
          if(!(hscroll === false && col === 0)){
              while(this.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;
  
  		var c = this.scroller.dom;
  
          var ctop = 0;
          var p = rowEl, stop = this.el.dom;
          while(p && p != stop){
              ctop += p.offsetTop;
              p = p.offsetParent;
          }
          ctop -= this.mainHd.dom.offsetHeight;
  
          var cbot = ctop + rowEl.offsetHeight;
  
          var ch = c.clientHeight;
          var stop = parseInt(c.scrollTop, 10);
          var 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){
          if(!isUpdate && firstRow === 0 && lastRow >= dm.getCount()-1){
              this.refresh();
          }else{
              if(!isUpdate){
                  this.fireEvent("beforerowsinserted", this, firstRow, lastRow);
              }
              var html = this.renderRows(firstRow, lastRow);
              var before = this.getRow(firstRow);
              if(before){
                  Ext.DomHelper.insertHtml('beforeBegin', before, html);
              }else{
                  Ext.DomHelper.insertHtml('beforeEnd', this.mainBody.dom, html);
              }
              if(!isUpdate){
                  this.fireEvent("rowsinserted", this, firstRow, lastRow);
                  this.processRows(firstRow);
              }
          }
          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 ? 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.scrollOffset;
  
          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.scrollOffset;
              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() || '&nbsp;';
          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);
  
          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;
          }
          if(this.grid.enableColumnMove){
              var dds = Ext.dd.DDM.ids['gridHeader' + this.grid.getGridEl().id];
              if(dds){
                  for(var dd in dds){
                      if(!dds[dd].config.isTarget && dds[dd].dragElId){
                          var elid = dds[dd].dragElId;
                          dds[dd].unreg();
                          Ext.get(elid).remove();
                      } else if(dds[dd].config.isTarget){
                          dds[dd].proxyTop.remove();
                          dds[dd].proxyBottom.remove();
                          dds[dd].unreg();
                      }
                      if(Ext.dd.DDM.locationCache[dd]){
                          delete Ext.dd.DDM.locationCache[dd];
                      }
                  }
                  delete Ext.dd.DDM.ids['gridHeader' + this.grid.getGridEl().id];
              }
          }
  
          if(this.dragZone){
              this.dragZone.unreg();
          }
          
          Ext.fly(this.innerHd).removeAllListeners();
          Ext.removeNode(this.innerHd);
          
          Ext.destroy(this.resizeMarker, this.resizeProxy, this.focusEl, this.mainBody, 
                      this.scroller, this.mainHd, this.mainWrap, this.dragZone, 
                      this.splitZone, this.columnDrag, this.columnDrop);
  
          this.initData(null, null);
          Ext.EventManager.removeResizeListener(this.onWindowResize, this);
          this.purgeListeners();
      },
  
      // 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("load", this.onLoad, this);
              ds.on("datachanged", this.onDataChange, this);
              ds.on("add", this.onAdd, this);
              ds.on("remove", this.onRemove, this);
              ds.on("update", this.onUpdate, this);
              ds.on("clear", this.onClear, this);
          }
          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);
              this.cm.un("columnlockchange", this.onColumnLock, this);
          }
          if(cm){
              delete this.lastViewWidth;
              cm.on("configchange", this.onColConfigChange, this);
              cm.on("widthchange", this.onColWidthChange, this);
              cm.on("headerchange", this.onHeaderChange, this);
              cm.on("hiddenchange", this.onHiddenChange, this);
              cm.on("columnmoved", this.onColumnMove, this);
              cm.on("columnlockchange", this.onColumnLock, this);
          }
          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();
      },
  
      // 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);
      },
  
      // 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;
          var cm = this.cm, ds = this.ds;
          switch(item.itemId){
              case "asc":
                  ds.sort(cm.getDataIndex(index), "ASC");
                  break;
              case "desc":
                  ds.sort(cm.getDataIndex(index), "DESC");
                  break;
              default:
                  index = cm.getIndexById(item.itemId.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.activeHd = hd;
              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){
          if(this.activeHd && !this.headersDisabled){
              var hw = this.splitHandleWidth || 5;
              var r = this.activeHdRegion;
              var x = e.getPageX();
              var ss = this.activeHd.style;
              if(x - r.left <= hw && this.cm.isResizable(this.activeHdIndex-1)){
                  ss.cursor = 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)){
                  ss.cursor = Ext.isAir ? 'move' : Ext.isWebKit ? 'w-resize' : 'col-resize';
              }else{
                  ss.cursor = '';
              }
          }
      },
  
      // private
      handleHdOut : function(e, t){
          var hd = this.findHeaderCell(t);
          if(hd && (!Ext.isIE || !e.within(hd, true))){
              this.activeHd = 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);
      }
  });
  