Flex中如何利用mx:states和mx:State创建不同状态应用的例子

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代码

<!--<br/ /><br/ />Code highlighting produced by Actipro CodeHighlighter (freeware)<br/ />http://www.CodeHighlighter.com/<br/ /><br/ />--><?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">

<mx:states>
<mx:State name="login">
<mx:AddChild>
<mx:Form id="loginForm">
<mx:FormHeading label="Login" />
<mx:FormItem label="Username:">
<mx:TextInput id="log_username" />
</mx:FormItem>
<mx:FormItem label="Password:">
<mx:TextInput id="log_password"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem>
<mx:Button label="Login" />
</mx:FormItem>
</mx:Form>
</mx:AddChild>
</mx:State>
<mx:State name="register">
<mx:AddChild>
<mx:Form id="registerForm">
<mx:FormHeading label="Register" />
<mx:FormItem label="Username:">
<mx:TextInput id="reg_username" />
</mx:FormItem>
<mx:FormItem label="Password:">
<mx:TextInput id="reg_password1"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem label="Confirm password:">
<mx:TextInput id="reg_password2"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem>
<mx:Button label="Register" />
</mx:FormItem>
</mx:Form>
</mx:AddChild>
</mx:State>
</mx:states>

<mx:transitions>
<mx:Transition id="loginTransition"
fromState="*"
toState="login">
<mx:WipeDown target="{loginForm}"/>
</mx:Transition>
<mx:Transition id="registerTransition"
fromState="*"
toState="register">
<mx:WipeDown target="{registerForm}"/>
</mx:Transition>
</mx:transitions>

<mx:Script>
<![CDATA[
import mx.events.ItemClickEvent;

private function toggleButtonBar_itemClick(evt:ItemClickEvent):void {
currentState = evt.item.data;
}
]]>
</mx:Script>

<mx:Array id="dp">
<mx:Object data="" label="Default state" />
<mx:Object data="login" label="Login" />
<mx:Object data="register" label="Register" />
</mx:Array>

<mx:ApplicationControlBar dock="true">
<mx:ToggleButtonBar id="toggleButtonBar"
dataProvider="{dp}"
itemClick="toggleButtonBar_itemClick(event);" />
</mx:ApplicationControlBar>

</mx:Application>

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