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[英]How do I set the dataProvider for an <s:List> component to be an XML file?
[英]How to override set data method when using custom class objects in grid's dataprovider
*新手警报*
我有5列的AdvancedDataGrid。 第二列的标题为Labels,必须能够在每个单元格中包含多行。
最初,我的网格的数据提供程序定义如下:
[Bindable]
public var mappedTagsArray:ArrayCollection = new ArrayCollection( [
{ name: "garbage-garbage", semanticTags: "garbage-flirt\ngarbage-garbage\ngarbage-noise\ngarbage-profanity", exitStrategy: "Fallback", confirmationMode: "IF NECESSARY", confirmationPromptlet: "cp5" },
{ name: "report-sim", semanticTags: "enquire-sim\nreport-sim", exitStrategy: "Direct", confirmationMode: "NEVER", confirmationPromptlet: "cp6" }
] );
Columns标签的定义如下,带有一个内联的TextArea组件来处理一个单元格中的多行:
<mx:AdvancedDataGridColumn id="semanticTags" headerText="Labels" dataField="semanticTags" editable="false">
<mx:itemRenderer>
<fx:Component>
<mx:HBox horizontalScrollPolicy="off" verticalScrollPolicy="off"
top="0" bottom="0" right="0" left="0">
<fx:Script>
<![CDATA[
import com.nuance.csportal.mw_api.CallerIntent;
public function get value() : String
{
return ta_labels.text;
}
override public function set data(value:Object):void
{
super.data = value;
ta_labels.text = value.semanticTags;
}
]]>
</fx:Script>
<!-- BUG: Scroll bar is fixed in one location; does not move with resizing of cell -->
<s:TextArea id="ta_labels" heightInLines="2" editable="false" borderVisible="false"
horizontalScrollPolicy="auto" verticalScrollPolicy="auto" contentBackgroundAlpha="0"
top="0" bottom="0" right="0" left="0"/>
</mx:HBox>
</fx:Component>
</mx:itemRenderer>
</mx:AdvancedDataGridColumn>
在这种情况下,“语义标签”多行显示在“标签”列的单元格中。
现在,我创建了一个名为CallerIntent的自定义ActionScript类:
package com.nuance.csportal.mw_api
{
import mx.controls.List;
public class CallerIntent
{
public function CallerIntent( id:int, name:String, semanticTags:Array, exitStrategy:String, confirmationMode:String, confirmationPromptlet:String )
{
this.id = id;
this.name = name;
this.semanticTags = semanticTags;
this.exitStrategy = exitStrategy;
this.confirmationMode = confirmationMode;
this.confirmationPromptlet = confirmationPromptlet;
}
public var id:int;
public var name:String;
public var semanticTags:Array;
public var exitStrategy:String;
public var confirmationMode:String;
public var confirmationPromptlet:String;
}
}
在表单的creationComplete上调用的init()方法中,填充网格的数据提供程序:
public function init( event:Event ):void
{
var st1:Array = new Array( "garbage-flirt", "garbage-garbage", "garbage-noise", "garbage-profanity" );
var st2:Array = new Array( "enquire-sim", "report-sim" );
var ci1:CallerIntent = new CallerIntent( 1, "garbage-garbage", st1, "Fallback", "IF NECESSARY", "cp1" );
var ci2:CallerIntent = new CallerIntent( 2, "report-sim", st2, "Direct", "NEVER", "cp2" );
mappedTagsArray.addItem( ci1 );
mappedTagsArray.addItem( ci2 );
}
在这种情况下,我的应用程序在ta_labels.text = value.semanticTags;的替代集数据方法中崩溃; 与无法访问空对象引用的属性或方法。
这是真的–当我使用CallerIntent对象的ArrayCollection而不是未命名对象的ArrayCollection时,值保持为空(在这种情况下,值将保存未命名的对象)。
我尝试更改函数的签名以覆盖公共函数集data(value:CallerIntent):void并获得了Incompatible Override。
有任何想法吗? 谢谢! 邦妮
我已经解决了我的问题。 在首先调用覆盖的set数据方法之后,将填充网格的dataprovider。 因此,我只需要放
if ( value != null )
围绕此代码。
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