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+ <title>The source code</title>\r
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+ <pre class="prettyprint lang-js"><div id="cls-Ext.grid.CellSelectionModel"></div>/**
+ * @class Ext.grid.CellSelectionModel
+ * @extends Ext.grid.AbstractSelectionModel
+ * This class provides the basic implementation for <i>single</i> <b>cell</b> selection in a grid.
+ * The object stored as the selection contains the following properties:
+ * <div class="mdetail-params"><ul>
+ * <li><b>cell</b> : see {@link #getSelectedCell}
+ * <li><b>record</b> : Ext.data.record The {@link Ext.data.Record Record}
+ * which provides the data for the row containing the selection</li>
+ * </ul></div>
+ * @constructor
+ * @param {Object} config The object containing the configuration of this model.
+ */
+Ext.grid.CellSelectionModel = function(config){
+ Ext.apply(this, config);
+
+ this.selection = null;
+
+ this.addEvents(
+ <div id="event-Ext.grid.CellSelectionModel-beforecellselect"></div>/**
+ * @event beforecellselect
+ * Fires before a cell is selected, return false to cancel the selection.
+ * @param {SelectionModel} this
+ * @param {Number} rowIndex The selected row index
+ * @param {Number} colIndex The selected cell index
+ */
+ "beforecellselect",
+ <div id="event-Ext.grid.CellSelectionModel-cellselect"></div>/**
+ * @event cellselect
+ * Fires when a cell is selected.
+ * @param {SelectionModel} this
+ * @param {Number} rowIndex The selected row index
+ * @param {Number} colIndex The selected cell index
+ */
+ "cellselect",
+ <div id="event-Ext.grid.CellSelectionModel-selectionchange"></div>/**
+ * @event selectionchange
+ * Fires when the active selection changes.
+ * @param {SelectionModel} this
+ * @param {Object} selection null for no selection or an object with two properties
+ * <div class="mdetail-params"><ul>
+ * <li><b>cell</b> : see {@link #getSelectedCell}
+ * <li><b>record</b> : Ext.data.record<p class="sub-desc">The {@link Ext.data.Record Record}
+ * which provides the data for the row containing the selection</p></li>
+ * </ul></div>
+ */
+ "selectionchange"
+ );
+
+ Ext.grid.CellSelectionModel.superclass.constructor.call(this);
+};
+
+Ext.extend(Ext.grid.CellSelectionModel, Ext.grid.AbstractSelectionModel, {
+
+ /** @ignore */
+ initEvents : function(){
+ this.grid.on("cellmousedown", this.handleMouseDown, this);
+ this.grid.getGridEl().on(Ext.EventManager.useKeydown ? "keydown" : "keypress", this.handleKeyDown, this);
+ var view = this.grid.view;
+ view.on("refresh", this.onViewChange, this);
+ view.on("rowupdated", this.onRowUpdated, this);
+ view.on("beforerowremoved", this.clearSelections, this);
+ view.on("beforerowsinserted", this.clearSelections, this);
+ if(this.grid.isEditor){
+ this.grid.on("beforeedit", this.beforeEdit, this);
+ }
+ },
+
+ //private
+ beforeEdit : function(e){
+ this.select(e.row, e.column, false, true, e.record);
+ },
+
+ //private
+ onRowUpdated : function(v, index, r){
+ if(this.selection && this.selection.record == r){
+ v.onCellSelect(index, this.selection.cell[1]);
+ }
+ },
+
+ //private
+ onViewChange : function(){
+ this.clearSelections(true);
+ },
+
+ <div id="method-Ext.grid.CellSelectionModel-getSelectedCell"></div>/**
+ * Returns an array containing the row and column indexes of the currently selected cell
+ * (e.g., [0, 0]), or null if none selected. The array has elements:
+ * <div class="mdetail-params"><ul>
+ * <li><b>rowIndex</b> : Number<p class="sub-desc">The index of the selected row</p></li>
+ * <li><b>cellIndex</b> : Number<p class="sub-desc">The index of the selected cell.
+ * Due to possible column reordering, the cellIndex should <b>not</b> be used as an
+ * index into the Record's data. Instead, use the cellIndex to determine the <i>name</i>
+ * of the selected cell and use the field name to retrieve the data value from the record:<pre><code>
+// get name
+var fieldName = grid.getColumnModel().getDataIndex(cellIndex);
+// get data value based on name
+var data = record.get(fieldName);
+ * </code></pre></p></li>
+ * </ul></div>
+ * @return {Array} An array containing the row and column indexes of the selected cell, or null if none selected.
+ */
+ getSelectedCell : function(){
+ return this.selection ? this.selection.cell : null;
+ },
+
+ <div id="method-Ext.grid.CellSelectionModel-clearSelections"></div>/**
+ * If anything is selected, clears all selections and fires the selectionchange event.
+ * @param {Boolean} preventNotify <tt>true</tt> to prevent the gridview from
+ * being notified about the change.
+ */
+ clearSelections : function(preventNotify){
+ var s = this.selection;
+ if(s){
+ if(preventNotify !== true){
+ this.grid.view.onCellDeselect(s.cell[0], s.cell[1]);
+ }
+ this.selection = null;
+ this.fireEvent("selectionchange", this, null);
+ }
+ },
+
+ <div id="method-Ext.grid.CellSelectionModel-hasSelection"></div>/**
+ * Returns <tt>true</tt> if there is a selection.
+ * @return {Boolean}
+ */
+ hasSelection : function(){
+ return this.selection ? true : false;
+ },
+
+ /** @ignore */
+ handleMouseDown : function(g, row, cell, e){
+ if(e.button !== 0 || this.isLocked()){
+ return;
+ }
+ this.select(row, cell);
+ },
+
+ <div id="method-Ext.grid.CellSelectionModel-select"></div>/**
+ * Selects a cell. Before selecting a cell, fires the
+ * {@link #beforecellselect} event. If this check is satisfied the cell
+ * will be selected and followed up by firing the {@link #cellselect} and
+ * {@link #selectionchange} events.
+ * @param {Number} rowIndex The index of the row to select
+ * @param {Number} colIndex The index of the column to select
+ * @param {Boolean} preventViewNotify (optional) Specify <tt>true</tt> to
+ * prevent notifying the view (disables updating the selected appearance)
+ * @param {Boolean} preventFocus (optional) Whether to prevent the cell at
+ * the specified rowIndex / colIndex from being focused.
+ * @param {Ext.data.Record} r (optional) The record to select
+ */
+ select : function(rowIndex, colIndex, preventViewNotify, preventFocus, /*internal*/ r){
+ if(this.fireEvent("beforecellselect", this, rowIndex, colIndex) !== false){
+ this.clearSelections();
+ r = r || this.grid.store.getAt(rowIndex);
+ this.selection = {
+ record : r,
+ cell : [rowIndex, colIndex]
+ };
+ if(!preventViewNotify){
+ var v = this.grid.getView();
+ v.onCellSelect(rowIndex, colIndex);
+ if(preventFocus !== true){
+ v.focusCell(rowIndex, colIndex);
+ }
+ }
+ this.fireEvent("cellselect", this, rowIndex, colIndex);
+ this.fireEvent("selectionchange", this, this.selection);
+ }
+ },
+
+ //private
+ isSelectable : function(rowIndex, colIndex, cm){
+ return !cm.isHidden(colIndex);
+ },
+
+ /** @ignore */
+ handleKeyDown : function(e){
+ if(!e.isNavKeyPress()){
+ return;
+ }
+ var g = this.grid, s = this.selection;
+ if(!s){
+ e.stopEvent();
+ var cell = g.walkCells(0, 0, 1, this.isSelectable, this);
+ if(cell){
+ this.select(cell[0], cell[1]);
+ }
+ return;
+ }
+ var sm = this;
+ var walk = function(row, col, step){
+ return g.walkCells(row, col, step, sm.isSelectable, sm);
+ };
+ var k = e.getKey(), r = s.cell[0], c = s.cell[1];
+ var newCell;
+
+ switch(k){
+ case e.TAB:
+ if(e.shiftKey){
+ newCell = walk(r, c-1, -1);
+ }else{
+ newCell = walk(r, c+1, 1);
+ }
+ break;
+ case e.DOWN:
+ newCell = walk(r+1, c, 1);
+ break;
+ case e.UP:
+ newCell = walk(r-1, c, -1);
+ break;
+ case e.RIGHT:
+ newCell = walk(r, c+1, 1);
+ break;
+ case e.LEFT:
+ newCell = walk(r, c-1, -1);
+ break;
+ case e.ENTER:
+ if(g.isEditor && !g.editing){
+ g.startEditing(r, c);
+ e.stopEvent();
+ return;
+ }
+ break;
+ }
+ if(newCell){
+ this.select(newCell[0], newCell[1]);
+ e.stopEvent();
+ }
+ },
+
+ acceptsNav : function(row, col, cm){
+ return !cm.isHidden(col) && cm.isCellEditable(col, row);
+ },
+
+ onEditorKey : function(field, e){
+ var k = e.getKey(), newCell, g = this.grid, ed = g.activeEditor;
+ if(k == e.TAB){
+ if(e.shiftKey){
+ 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);
+ }
+ e.stopEvent();
+ }else if(k == e.ENTER){
+ ed.completeEdit();
+ e.stopEvent();
+ }else if(k == e.ESC){
+ e.stopEvent();
+ ed.cancelEdit();
+ }
+ if(newCell){
+ g.startEditing(newCell[0], newCell[1]);
+ }
+ }
+});</pre> \r
+</body>\r
+</html>
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