6.7.AdvancedDataGrid数据项选择
6.7.1. 问题
我想编程实现选择AdvancedDataGrid 多个单元格
6.7.2. 问题
设置AdvancedDataGrid 的selectionMode 属性为multipleCells 和selectedCells 属性为object数组，该数组包含被选择单元格的rowIndex 和columnIndex。
6.7.3. 讨论
AdvancedDataGrid 控件对于选择单元格提供了多种选项设置。selectionMode 属性值有以下几种选择：
Multiple cells
Multiple rows
Single cell
Single row
None
要允许多个单元格被选择，allowMultipleSelection 属性也需要被设置为true。
下面的例子中，当用户选择City 列中的复选框时，该列的所有单元格都被选中。这个例子代码建立上一节的例子之上。当city 列表头的复选框被选择时，AdvancedDataGrid 发出ColumnSelectedEvent 事件，由onColumnSelect 方法处理该事件。onColumnSelect 方法构造一个object 数组，每个对象都包含被选择单元格的rowIndex 和cellIndex。这个例子选中了该列的所有单元格，最后把这个object 数组赋值给selectedCells 属性。需要注意的是，如果表格显示发生变化，则需要重新创建一个数组并赋值给selectedCells 属性。想通过
grid.selectedCells.push 方法直接添加单元格到selectedCells 属性是不行的，因为表格不会去检测数组是否发生变化。
我想编程实现选择AdvancedDataGrid 多个单元格
6.7.2. 问题
设置AdvancedDataGrid 的selectionMode 属性为multipleCells 和selectedCells 属性为object数组，该数组包含被选择单元格的rowIndex 和columnIndex。
6.7.3. 讨论
AdvancedDataGrid 控件对于选择单元格提供了多种选项设置。selectionMode 属性值有以下几种选择：
Multiple cells
Multiple rows
Single cell
Single row
None
要允许多个单元格被选择，allowMultipleSelection 属性也需要被设置为true。
下面的例子中，当用户选择City 列中的复选框时，该列的所有单元格都被选中。这个例子代码建立上一节的例子之上。当city 列表头的复选框被选择时，AdvancedDataGrid 发出ColumnSelectedEvent 事件，由onColumnSelect 方法处理该事件。onColumnSelect 方法构造一个object 数组，每个对象都包含被选择单元格的rowIndex 和cellIndex。这个例子选中了该列的所有单元格，最后把这个object 数组赋值给selectedCells 属性。需要注意的是，如果表格显示发生变化，则需要重新创建一个数组并赋值给selectedCells 属性。想通过
grid.selectedCells.push 方法直接添加单元格到selectedCells 属性是不行的，因为表格不会去检测数组是否发生变化。
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-XML
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical" creationComplete="initApp()">
<mx:HTTPService id="srv" url="assets/homesforsale.xml"
resultFormat="object" result="onResult(event)"/>
<mx:Form>
<mx:FormItem label="City">
<mx:TextInput id="cityFilter" change="applyFilter()"/>
</mx:FormItem>
</mx:Form>
<mx:AdvancedDataGrid id="grid" width="100%" height="100%"
sortExpertMode="true" dataProvider="{homesForSale}"
selectionMode="multipleCells"
creationComplete="assignListeners()">
<mx:columns>
<mx:AdvancedDataGridColumn headerText="Total No."
dataField="total"/>
<mx:AdvancedDataGridColumn headerText="City"
sortable="false"
headerRenderer="CheckBoxHeaderRenderer2" dataField="city"/>
<mx:AdvancedDataGridColumn headerText="State"
dataField="state"/>
<mx:AdvancedDataGridColumn headerText="Price Ranges
[<350K] [350K -600K] [>600K]"
dataField="range"
itemRenderer="RangeRenderer"
sortCompareFunction="sortRanges"/>
</mx:columns>
</mx:AdvancedDataGrid>
<mx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
private var homesForSale:ArrayCollection;
private function initApp():void {
this.srv.send();
}
private function onResult(evt:ResultEvent):void {
this.homesForSale = evt.result.data.region;
}
private function sortRanges(obj1:Object,
obj2:Object):int{
var value1:Number = obj1.range.range1;
var value2:Number = obj2.range.range1;
if(value1 < value2) {
return -1;
}
else if(value1 > value2){
return 1;
}
else {
return 0;
}
}
private function applyFilter():void {
if(this.homesForSale.filterFunction == null) {
this.homesForSale.filterFunction =
this.filterCities;
}
this.homesForSale.refresh();
}
private function filterCities(item:Object):Boolean {
var match:Boolean = true;
if(cityFilter.text != "") {
var city:String = item["city"];
var filter:String = this.cityFilter.text;
if(!city ||
city.toLowerCase().indexOf(filter.toLowerCase()) < 0) {
match = false;
}
}
return match;
}
private function assignListeners():void {
this.grid.addEventListener(ColumnSelectedEvent.COLUMN_SELECTED,
onColumnSelect);
}
private function
onColumnSelect(evt:ColumnSelectedEvent):void {
var selectedCells:Array = new Array();
var colIdx:int = evt.colIdx;
if(evt.isSelected) {
for(var i:int=0;i<this.homesForSale.length;i++) {
selectedCells.push({rowIndex:i,columnIndex:colIdx});
}
}
this.grid.selectedCells = selectedCells;
}
]]>
</mx:Script>
</mx:Application>
layout="vertical" creationComplete="initApp()">
<mx:HTTPService id="srv" url="assets/homesforsale.xml"
resultFormat="object" result="onResult(event)"/>
<mx:Form>
<mx:FormItem label="City">
<mx:TextInput id="cityFilter" change="applyFilter()"/>
</mx:FormItem>
</mx:Form>
<mx:AdvancedDataGrid id="grid" width="100%" height="100%"
sortExpertMode="true" dataProvider="{homesForSale}"
selectionMode="multipleCells"
creationComplete="assignListeners()">
<mx:columns>
<mx:AdvancedDataGridColumn headerText="Total No."
dataField="total"/>
<mx:AdvancedDataGridColumn headerText="City"
sortable="false"
headerRenderer="CheckBoxHeaderRenderer2" dataField="city"/>
<mx:AdvancedDataGridColumn headerText="State"
dataField="state"/>
<mx:AdvancedDataGridColumn headerText="Price Ranges
[<350K] [350K -600K] [>600K]"
dataField="range"
itemRenderer="RangeRenderer"
sortCompareFunction="sortRanges"/>
</mx:columns>
</mx:AdvancedDataGrid>
<mx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.collections.ArrayCollection;
import mx.rpc.events.ResultEvent;
[Bindable]
private var homesForSale:ArrayCollection;
private function initApp():void {
this.srv.send();
}
private function onResult(evt:ResultEvent):void {
this.homesForSale = evt.result.data.region;
}
private function sortRanges(obj1:Object,
obj2:Object):int{
var value1:Number = obj1.range.range1;
var value2:Number = obj2.range.range1;
if(value1 < value2) {
return -1;
}
else if(value1 > value2){
return 1;
}
else {
return 0;
}
}
private function applyFilter():void {
if(this.homesForSale.filterFunction == null) {
this.homesForSale.filterFunction =
this.filterCities;
}
this.homesForSale.refresh();
}
private function filterCities(item:Object):Boolean {
var match:Boolean = true;
if(cityFilter.text != "") {
var city:String = item["city"];
var filter:String = this.cityFilter.text;
if(!city ||
city.toLowerCase().indexOf(filter.toLowerCase()) < 0) {
match = false;
}
}
return match;
}
private function assignListeners():void {
this.grid.addEventListener(ColumnSelectedEvent.COLUMN_SELECTED,
onColumnSelect);
}
private function
onColumnSelect(evt:ColumnSelectedEvent):void {
var selectedCells:Array = new Array();
var colIdx:int = evt.colIdx;
if(evt.isSelected) {
for(var i:int=0;i<this.homesForSale.length;i++) {
selectedCells.push({rowIndex:i,columnIndex:colIdx});
}
}
this.grid.selectedCells = selectedCells;
}
]]>
</mx:Script>
</mx:Application>
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