我有以下转发器代码:
<mx:Repeater id="chapterRepeater" dataProvider="{Library.Book.Chapter}">
<mx:FormItem label="Chapter" direction="horizontal">
<mx:TextInput width="100" text="{ chapterRepeater.currentItem.@Name}"
change="event.currentTarget.getRepeaterItem().@Name = event.target.text"/>
<mx:NumericStepper maximum="2000" minimum="0" value="{chapterRepeater.currentItem.@Value}"
change="event.currentTarget.getRepeaterItem().@Value = event.target.value"/>
<mx:Button label="x" width="20" click="delete event.currentTarget.getRepeaterItem()"/>
</mx:FormItem>
</mx:Repeater>
代理以下XML
<Library Name="TestLibrary1">
<Book Name="TestBook1">
<Chapter Name="TestChapter1" Words="530"/>
<Chapter Name="TestChapter2" Words="490"/>
<Chapter Name="TestChapter3" Words="1030"/>
</Book>
</Library>
这允许用户编辑Chapter对象的名称和值。但是,“删除”操作由于某种原因不起作用?
有人可以告诉我如何在转发器中引用项目以删除它们吗?
答案 0 :(得分:3)
我的解决方案将FormItem外部化为它自己的组件(就这样,当点击被触发时我可以从FormItem冒泡事件。这样我总是知道事件来自哪个formItem)然后通过的XMLListCollection。
所以我有一个名为ChapterFormItem.mxml的独立组件,其中包含
<?xml version="1.0" encoding="utf-8"?>
<mx:FormItem xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:Script>
<![CDATA[
private var _chapterData : XML;
[Bindable]
public function get chapterData() : XML
{
return _chapterData;
}
public function set chapterData(value : XML) : void
{
_chapterData = value;
}
private function clickHandler(event : MouseEvent) : void
{
dispatchEvent(new Event("deleteChapter"));
}
private function textInputChangeHandler(event : Event) : void
{
chapterData.@Name = textInput.text;
}
private function numericStepperChangeHandler(event : Event) : void
{
chapterData.@Value = numericStepper.value;
}
]]>
</mx:Script>
<mx:Metadata>
[Event(name="deleteChapter", type="flash.events.Event")]
</mx:Metadata>
<mx:TextInput id="textInput" width="100" text="{chapterData.@Name}" change="textInputChangeHandler(event)"/>
<mx:NumericStepper id="numericStepper" maximum="2000" minimum="0" value="{chapterData.@Value}" change="numericStepperChangeHandler(event)"/>
<mx:Button label="x" width="20" click="clickHandler(event)"/>
</mx:FormItem>
并且在主应用程序xml(对于这个例子)我有
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" xmlns:local="*">
<mx:Script>
<![CDATA[
import mx.collections.XMLListCollection;
import mx.collections.ArrayCollection;
[Bindable]
private var xml:XML = <Library Name="TestLibrary1">
<Book Name="TestBook1">
<Chapter Name="TestChapter1" Words="530"/>
<Chapter Name="TestChapter2" Words="490"/>
<Chapter Name="TestChapter3" Words="1030"/>
</Book>
</Library>;
private function itemDeleteHandler(event : Event) : void
{
var chapterItem : ChapterFormItem = event.currentTarget as ChapterFormItem;
var chapterData : XML = chapterItem.chapterData;
var xmlListCollection : XMLListCollection = new XMLListCollection(xml.Book.Chapter);
var chapterDataIndex : int = xmlListCollection.getItemIndex(chapterData);
xmlListCollection.removeItemAt(chapterDataIndex);
}
]]>
</mx:Script>
<mx:Form width="100%" height="100%">
<mx:Repeater id="chapterRepeater" dataProvider="{xml.Book.Chapter}">
<local:ChapterFormItem label="Chapter"
direction="horizontal"
chapterData="{chapterRepeater.currentItem}"
deleteChapter="itemDeleteHandler(event)" />
</mx:Repeater>
</mx:Form>
</mx:Application>