Flex中处理事件

接收事件通知有三种方式：

1.在MXML中注册一个事件处理器

xmlns:mx=””
width=”300″ height=”200″
horizontalAlign=”center” verticalAlign=”middle”
>

import flash.events.MouseEvent;

private function clickHandler ( event:MouseEvent ):void
{
myLabel.text = “Hello, World!”;
}
]]>

title=”My Application” horizontalAlign=”center”
paddingTop=”10″ paddingBottom=”10″ paddingLeft=”10″
paddingRight=”10″ >

fontSize=”24″/>
click=”clickHandler(event);” />

2.在 MXML中创建一个内联（inline）的事件处理器

xmlns:mx=””
horizontalAlign=”center” verticalAlign=”middle”
width=”300″ height=”200″>

title=”My Application” horizontalAlign=”center”
paddingTop=”10″ paddingBottom=”10″ paddingLeft=”10″
paddingRight=”10″>

fontSize=”24″/>
‘Hello, World!’” />

3.通过 ActionScript 注册一个事件监听器

xmlns:mx=””
horizontalAlign=”center” verticalAlign=”middle”
width=”300″ height=”200″
creationComplete=”creationCompleteHandler(event);”>

import flash.events.MouseEvent;
import mx.events.FlexEvent;

private function
creationCompleteHandler(event:FlexEvent):void

{
// Listen for the click event on the Button control
myButton.addEventListener (MouseEvent.CLICK,
clickHandler);
}

private function clickHandler ( event:Event ):void

{
myLabel.text = “Hello, World!”;
}
]]>

title=”My Application” horizontalAlign=”center”
paddingTop=”10″ paddingBottom=”10″ paddingLeft=”10″
paddingRight=”10″>

fontSize=”24″/>