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+
+
+ The source code
+
+
+
+
+ /**
+ * @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
+ * true to allow selection of only one row at a time (defaults to false
+ * allowing multiple selections)
+ */
+ singleSelect : false,
+
+ /**
+ * @cfg {Boolean} moveEditorOnEnter
+ * false 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
+ });
+
+ var view = this.grid.view;
+ view.on("refresh", this.onRefresh, this);
+ view.on("rowupdated", this.onRowUpdated, this);
+ view.on("rowremoved", this.onRemove, this);
+ },
+
+ // 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) true 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) true 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) true to keep existing selections
+ * @return {Boolean} true if there is a next row, else false
+ */
+ 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) true to keep existing selections
+ * @return {Boolean} true if there is a previous row, else false
+ */
+ 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
+ * false, iteration is stopped and this function returns
+ * false. Otherwise it returns true.
+ * @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) true 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 true if there is a selection.
+ * @return {Boolean}
+ */
+ hasSelection : function(){
+ return this.selections.length > 0;
+ },
+
+ /**
+ * Returns true 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 true 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) true to keep
+ * existing selections (defaults to false)
+ */
+ 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) true to keep existing selections
+ * @param {Boolean} preventViewNotify (optional) Specify true 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 true 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, ed = g.activeEditor;
+ 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){
+ e.stopEvent();
+ ed.completeEdit();
+ if(this.moveEditorOnEnter !== false){
+ if(shift){
+ newCell = g.walkCells(ed.row - 1, ed.col, -1, this.acceptsNav, this);
+ }else{
+ newCell = g.walkCells(ed.row + 1, ed.col, 1, this.acceptsNav, this);
+ }
+ }
+ }else if(k == e.ESC){
+ ed.cancelEdit();
+ }
+ if(newCell){
+ g.startEditing(newCell[0], newCell[1]);
+ }
+ },
+
+ destroy: function(){
+ if(this.rowNav){
+ this.rowNav.disable();
+ this.rowNav = null;
+ }
+ Ext.grid.RowSelectionModel.superclass.destroy.call(this);
+ }
+});
+
+
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