Flex的元素includein [英] Flex element includein

问题描述

在Flex中，我们可以通过这个分配状态的元素：

In Flex, we can assign state to an element via this:

<s:Button id="mybtn" includeIn="mystate" label="button label"/>

我们如何才能做到 includeIn 使用ActionScript？

How can we do the includeIn with ActionScript?

感谢您。

推荐答案

在 includeIn 伪属性只存在于MXML语言。我把它称为伪属性，因为它不映射到属性或（Button类的在你的榜样）的样式。

The includeIn pseudo-attribute only exists in the MXML language. I call it a pseudo-attribute because it does not map to a property or a style (of the Button class in your example).

相反，它是旧的MX 为addItems 标签的速记符号。在该语法您的例子看起来是这样的：

Instead it is a shorthand notation of the old mx AddItems tag. In that syntax your example would look something like this:

<mx:states>
    <mx:State name="normal"/>
    <mx:State name="mystate">
        <mx:AddItems items="{mybtn}"/>
    </mx:State>
</mx:states>

<mx:Button id="mybtn"/>

我提到这一点，因为这是 includeIn 产生的动作code是非常相似的。这是什么样子：

I mention this, because the ActionScript code that is generated for includeIn is very similar. This is what it looks like:

states = [
    new State ({
        name: "normal",
        overrides: []
    }),
    new State ({
        name: "mystate",
        overrides: [
          new AddItems().initializeFromObject({
            itemsFactory: _TestFlex_Button1_factory,
            destination: null,
            position: "first"
          })
        ]
    })
];

所不同的是，它使用一个工厂来实例化按钮。
请注意，如果你有兴趣在从MXML code产生的动作code，你可以看看它只是通过传递继续生成，动作标志的编译器（见 mxmlc编译选项）

The difference is that it uses a factory to instantiate the Button.
Note that if you're interested in the ActionScript code that is generated from MXML code, you can have a look at it simply by passing the keep-generated-actionscript flag to the compiler (see mxmlc compiler options).

当然，如果你真的想'手动'写逻辑（我不会），它可能更容易覆盖的 setCurrentState（）或侦听的 CURRENT_STATE_CHANGE 事件，并调用的addElement（）或 removeElement（）取决于值 currentState的。

Of course if you really want to 'manually' write that logic (I wouldn't), it may be easier to override setCurrentState() or listen for the CURRENT_STATE_CHANGE event, and call addElement() or removeElement() depending on the value of currentState.

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