Flex中如何利用键盘关闭(Esc)一个弹出窗口的例子
接下来的例子演示了Flex中如何利用键盘关闭(Esc)一个弹出窗口。
源文件：
main.mxml：
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="top"
backgroundColor="white">
<mx:Script>
<![CDATA[
import mx.managers.PopUpManager;
private function button_click(evt:MouseEvent):void {
var popUpTitleWindow:PopUpTitleWindow = new PopUpTitleWindow();
PopUpManager.addPopUp(popUpTitleWindow, this, true);
}
]]>
</mx:Script>
<mx:Button id="button"
label="Launch Window"
click="button_click(event);" />
</mx:Application>
下面是PopUpTitleWindow.mxml的代码：
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:mx="http://www.adobe.com/2006/mxml"
showCloseButton="true"
styleName="noPadding"
layout="absolute"
width="300"
height="200"
creationComplete="init();"
resize="init();"
close="titleWindow_close(event);"
keyDown="titleWindow_keyDown(event);">
<mx:Style>
.noPadding {
paddingBottom: 0;
paddingTop: 0;
paddingLeft: 0;
paddingRight: 0;
}
</mx:Style>
<mx:Script>
<![CDATA[
import mx.core.IFlexDisplayObject;
import mx.events.CloseEvent;
import mx.managers.PopUpManager;
[Bindable]
public var source:String;
private function init():void {
PopUpManager.centerPopUp(this);
this.setFocus();
}
private function titleWindow_close(evt:CloseEvent):void {
PopUpManager.removePopUp(evt.target as IFlexDisplayObject);
}
private function titleWindow_keyDown(evt:KeyboardEvent):void {
if (evt.charCode == Keyboard.ESCAPE) {
this.dispatchEvent(new CloseEvent(CloseEvent.CLOSE));
}
}
]]>
</mx:Script>
<mx:Label id="lbl"
text="Press ESC to close this window."
fontWeight="bold"
truncateToFit="true"
horizontalCenter="0"
verticalCenter="0" />
<mx:ControlBar horizontalAlign="right" width="100%">
</mx:ControlBar>
</mx:TitleWindow>
