RowSelectionModel.js
/**
@class Ext.grid.RowSelectionModel
* @extends Ext.grid.AbstractSelectionModel
* The default SelectionModel used by {@link Ext.grid.Grid}.
It supports multiple selections and keyboard selection/navigation. <br><br>
@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" : true,
/**
* @event beforerowselect
* Fires when a row is selected being selected, return false to cancel.
* @param {SelectionModel} this
* @param {Number} rowIndex The selected index
*/
"beforerowselect" : true,
/**
* @event rowselect
* Fires when a row is selected.
* @param {SelectionModel} this
* @param {Number} rowIndex The selected index
*/
"rowselect" : true,
"rowdeselect" : true
});
this.locked = false;
};
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)
*/
singleSelect : false,
// private
initEvents : function(){
if(!this.grid.enableDragDrop && !this.grid.enableDrag){
this.grid.on("mousedown", this.handleMouseDown, this);
}
this.rowNav = new Ext.KeyNav(this.grid.container, {
"up" : function(e){
if(!e.shiftKey){
this.selectPrevious(e.shiftKey);
}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.selectNext(e.shiftKey);
}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.dataSource, i, v = this.grid.view;
var s = this.selections;
s.each(function(r){
if((i = ds.indexOfId(r.id)) != -1){
v.onRowSelect(i);
}else{
s.remove(r);
}
});
},
// private
onRemove : function(v, index, r){
this.selections.remove(r);
},
// 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 （可选） True to keep existing selections
*/
selectRecords : function(records, keepExisting){
if(!keepExisting){
this.clearSelections();
}
var ds = this.grid.dataSource;
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 （可选） True to keep existing selections
*/
selectLastRow : function(keepExisting){
this.selectRow(this.grid.dataSource.getCount() - 1, keepExisting);
},
/**
* Selects the row immediately following the last selected row.
* @param {Boolean} keepExisting （可选） True to keep existing selections
*/
selectNext : function(keepExisting){
if(this.last !== false && (this.last+1) < this.grid.dataSource.getCount()){
this.selectRow(this.last+1, keepExisting);
this.grid.getView().focusRow(this.last);
}
},
/**
* Selects the row that precedes the last selected row.
* @param {Boolean} keepExisting （可选） True to keep existing selections
*/
selectPrevious : function(keepExisting){
if(this.last){
this.selectRow(this.last-1, keepExisting);
this.grid.getView().focusRow(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);
},
/**
* Clears all selections.
*/
clearSelections : function(fast){
if(this.locked) return;
if(fast !== true){
var ds = this.grid.dataSource;
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.
*/
selectAll : function(){
if(this.locked) return;
this.selections.clear();
for(var i = 0, len = this.grid.dataSource.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} record The record or index of the record to check
* @return {Boolean}
*/
isSelected : function(index){
var r = typeof index == "number" ? this.grid.dataSource.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(e, t){
var view = this.grid.getView(), rowIndex;
if(this.isLocked() || (rowIndex = view.findRowIndex(t)) === false){
return;
};
if(e.shiftKey && 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.button != 0 && isSelected){
view.focusRow(rowIndex);
}else if(e.ctrlKey && isSelected){
this.deselectRow(rowIndex);
}else{
this.selectRow(rowIndex, e.button == 0 && (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 （可选） True to keep existing selections
*/
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. 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 （可选） True to retain existing selections
*/
selectRange : function(startRow, endRow, keepExisting){
if(this.locked) return;
if(!keepExisting){
this.clearSelections();
}
if(startRow <= endRow){
for(var i = startRow; i <= endRow; i++){
this.selectRow(i, true);
}
}else{
for(var i = startRow; i >= endRow; i--){
this.selectRow(i, true);
}
}
},
/**
* Deselects a range of rows. 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.locked) return;
for(var i = startRow; i <= endRow; i++){
this.deselectRow(i, preventViewNotify);
}
},
/**
* Selects a row.
* @param {Number} row The index of the row to select
* @param {Boolean} keepExisting （可选） True to keep existing selections
*/
selectRow : function(index, keepExisting, preventViewNotify){
if(this.locked || (index < 0 || index >= this.grid.dataSource.getCount())) return;
if(this.fireEvent("beforerowselect", this, index, keepExisting) !== false){
if(!keepExisting || this.singleSelect){
this.clearSelections();
}
var r = this.grid.dataSource.getAt(index);
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.
* @param {Number} row The index of the row to deselect
*/
deselectRow : function(index, preventViewNotify){
if(this.locked) return;
if(this.last == index){
this.last = false;
}
if(this.lastActive == index){
this.lastActive = false;
}
var r = this.grid.dataSource.getAt(index);
this.selections.remove(r);
if(!preventViewNotify){
this.grid.getView().onRowDeselect(index);
}
this.fireEvent("rowdeselect", this, index);
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;
if(k == e.TAB){
ed.completeEdit();
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 && !e.ctrlKey){
ed.completeEdit();
if(e.shiftKey){
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);
}
e.stopEvent();
}else if(k == e.ESC){
ed.cancelEdit();
}
if(newCell){
g.startEditing(newCell[0], newCell[1]);
}
}
});
Ext - Copyright © 2006-2007 Ext JS, LLC
All rights reserved.