Flex DataGrid：根据另一个值更改值？ [英] Flex DataGrid: Change value based on another value?
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问题描述
< mx：DataGrid x =0y =45width =272 height =525dataProvider ={dp}variableRowHeight =trueeditable =trueid =equipmentDGverticalAlign =middle>
< mx：columns>
< mx：DataGridColumn headerText =headerStyleName =gridheaderwidth =20dataField =includededitorDataField =selectedrendererIsEditor =true>
< mx：itemRenderer>
< fx：Component>
< mx：CheckBox click =handleClicks（event）>
< fx：脚本>
<！[CDATA [
public function handleClicks（event：MouseEvent））：void
{
data.included =！data.included;
if（data.included&& data.antal == 0）
data.antal = data.minNo;
else if（！data.included）
data.antal = 0;
}
]]>
< / fx：脚本>
< / mx：CheckBox>
< / fx：Component>
< / mx：itemRenderer>
< / mx：DataGridColumn>
< mx：DataGridColumn headerText =AntalheaderStyleName =gridheaderwidth =40dataField =antaleditorDataField =valueeditable =true>
< mx：itemEditor>
< fx：Component>
< mx：NumericStepper stepSize =1width =35height =20focusOut =numericstepper1_changeHandler（event）>
< fx：脚本>
<！[CDATA [
import mx.events.NumericStepperEvent;
覆盖公共函数集数据（value：Object）：void
{
super.data = value;
if（value&& value.hasOwnProperty（minNo））
minimum = value.minNo;
if（value&& value.hasOwnProperty（maxNo））
maximum = value.maxNo;
}
protected function numericstepper1_changeHandler（event：Event）：void
{
if（data.antal> 0）
data.included = true ;
else
data.included = false;
}
]]>
< / fx：脚本>
< / mx：NumericStepper>
< / fx：Component>
< / mx：itemEditor>
< / mx：DataGridColumn>
< / mx：columns>
< / mx：DataGrid>
数据中的值更新（我可以看到它，当我关闭并打开这个对话框），但它不会在数据网格中立即更新。
解决方案
在数据对象中，确保触发每次包含的财产都会发生变化。在你的第二个itemRenderer听事件和更新的价值，每当属性更改。
概念上像这样：
在数据对象中：
private var _included：Boolean;
public function get included（）：Boolean {
return this._included;
}
public function set included（value：Boolean）：void
this._included = value;
this.dispatchEvent（new Event（'includedChanged'）;
}
将渲染器添加到您的第二列，如下所示：
< mx：DataGridColumn headerText =AntalheaderStyleName =gridheader width =40dataField =antaleditorDataField =valueeditable =true>
< mx：itemRenderer>
< fx：Component>
< mx：标签dataChange =onDataChange（）>
< fx：Script>
<！[CDATA [
public function onDataChange（）：void {
thistext = data [ 'Antal'];
this.data.addEventListener（'includedChanged'，onIncludedChange）;
}
public function onIncludedChange（e：Event）：void {
this.text =数据['Antal'];
}
]]>
< / fx：脚本>
< / mx：Label>
< / fx ：Component>
< / mx：itemRenderer>
< mx：itemEditor>
< fx：Component>
< mx： cStepper stepSize =1width =35height =20focusOut =numericstepper1_changeHandler（event）>
< fx：脚本>
<！[CDATA [
import mx.events.NumericStepperEvent;
覆盖公共函数集数据（value：Object）：void {
super.data = value;
if（value&& value.hasOwnProperty（minNo））
minimum = value.minNo;
if（value&& value.hasOwnProperty（maxNo））
maximum = value.maxNo;
}
protected function numericstepper1_changeHandler（event：Event）：void
{
if（data.antal> 0）
data.included = true ;
else
data.included = false;
}
]]>
< / fx：脚本>
< / mx：NumericStepper>
< / fx：Component>
< / mx：itemEditor>
< / mx：DataGridColumn>
I have a DataGrid in Flex, with one column a checkbox and another a numeric value. When the checkbox is clicked, the numeric value should change, either to 0 if the checkbox is unselected, or to a pre-defined minimum value if the checkbox is selected. Here is the code I have:
<mx:DataGrid x="0" y="45" width="272" height="525" dataProvider="{dp}" variableRowHeight="true" editable="true" id="equipmentDG" verticalAlign="middle">
<mx:columns>
<mx:DataGridColumn headerText="" headerStyleName="gridheader" width="20" dataField="included" editorDataField="selected" rendererIsEditor="true">
<mx:itemRenderer>
<fx:Component>
<mx:CheckBox click="handleClicks(event)">
<fx:Script>
<![CDATA[
public function handleClicks(event:MouseEvent):void
{
data.included = !data.included;
if(data.included && data.antal == 0)
data.antal = data.minNo;
else if(!data.included)
data.antal = 0;
}
]]>
</fx:Script>
</mx:CheckBox>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="Antal" headerStyleName="gridheader" width="40" dataField="antal" editorDataField="value" editable="true">
<mx:itemEditor>
<fx:Component>
<mx:NumericStepper stepSize="1" width="35" height="20" focusOut="numericstepper1_changeHandler(event)">
<fx:Script>
<![CDATA[
import mx.events.NumericStepperEvent;
override public function set data(value:Object):void
{
super.data = value;
if (value && value.hasOwnProperty("minNo"))
minimum = value.minNo;
if (value && value.hasOwnProperty("maxNo"))
maximum = value.maxNo;
}
protected function numericstepper1_changeHandler(event:Event):void
{
if(data.antal > 0)
data.included = true;
else
data.included = false;
}
]]>
</fx:Script>
</mx:NumericStepper>
</fx:Component>
</mx:itemEditor>
</mx:DataGridColumn>
</mx:columns>
</mx:DataGrid>
The value updates in the data (I can see it when I close and open the dialog this is in), but it doesn't update instantly in the data grid. How can I make the value visibly change as soon as the checkbox is clicked?
解决方案
In your data object, make sure to fire an event every time the included property changes. In your 2nd itemRenderer listen to the event and update the value whenever the property changes.
Conceptually like this:
In the data object:
private var _included : Boolean;
public function get included():Boolean{
return this._included;
}
public function set included(value:Boolean):void
this._included = value;
this.dispatchEvent(new Event('includedChanged');
}
Add a renderer to your second column, like this:
<mx:DataGridColumn headerText="Antal" headerStyleName="gridheader" width="40" dataField="antal" editorDataField="value" editable="true">
<mx:itemRenderer>
<fx:Component>
<mx:Label dataChange="onDataChange()" >
<fx:Script>
<![CDATA[
public function onDataChange():void{
thistext = data['Antal'];
this.data.addEventListener('includedChanged',onIncludedChange);
}
public function onIncludedChange(e:Event):void{
this.text = data['Antal'];
}
]]>
</fx:Script>
</mx:Label>
</fx:Component>
</mx:itemRenderer>
<mx:itemEditor>
<fx:Component>
<mx:NumericStepper stepSize="1" width="35" height="20" focusOut="numericstepper1_changeHandler(event)">
<fx:Script>
<![CDATA[
import mx.events.NumericStepperEvent;
override public function set data(value:Object):void{
super.data = value;
if (value && value.hasOwnProperty("minNo"))
minimum = value.minNo;
if (value && value.hasOwnProperty("maxNo"))
maximum = value.maxNo;
}
protected function numericstepper1_changeHandler(event:Event):void
{
if(data.antal > 0)
data.included = true;
else
data.included = false;
}
]]>
</fx:Script>
</mx:NumericStepper>
</fx:Component>
</mx:itemEditor>
</mx:DataGridColumn>
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