Flex 组件 - vbox 与 group 为什么一个可以编译，另一个则不能？

发布于 2024-11-13 09:24:53 字数 814 浏览 5 评论 0原文

试图理解为什么在flex（flash builder 4）中创建组件时，我无法从文件->新组件和引用“数据”创建组件，但示例略有不同。该组件将用作高级数据网格渲染器。

这个编译得很好：

<mx:VBox xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx" height="100%" width="100%" >
    <s:RichText text="{data.presentingProblemNotes}"/>
</mx:VBox>

这个不能编译，不喜欢 data.presentingProblemNotes

<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%">
    <s:RichText text="{data.presentingProblemNotes}"/>
</s:Group>

错误出现在“data”变量上 - 它不存在。

原文

Trying to understand why when creating a component in flex (flash builder 4) I am unable to create a component from file->new component and reference "data.", but a slightly different sample works. This component is going to be used as an advanced data grid renderer.

This one compiles fine:

<mx:VBox xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx" height="100%" width="100%" >
    <s:RichText text="{data.presentingProblemNotes}"/>
</mx:VBox>

This one does not compile, does not like the data.presentingProblemNotes

<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%">
    <s:RichText text="{data.presentingProblemNotes}"/>
</s:Group>

The error is on the "data" variable - that it does not exist.

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做个ˇ局外人 2024-11-20 09:24:53

在 mx 组件中，所有 UIComponent 都有一个用于项目渲染器的“data”属性，但该属性已在 Spark 组件中删除，因为并非所有组件都需要它。他们现在需要扩展 DataRenderer让它工作。在您的特定情况下，您可以这样做：

<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%">
    <s:RichText text="{data.presentingProblemNotes}"/>
</s:ItemRenderer>

In mx components, all UIComponent had a 'data' property which was used for item renderers, but that has been removed in Spark components because not all of them needed it. They now need to extend DataRenderer for it to work. In your particular case, you could do this instead:

<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
         xmlns:s="library://ns.adobe.com/flex/spark" 
         xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%">
    <s:RichText text="{data.presentingProblemNotes}"/>
</s:ItemRenderer>

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