Flex应用：实现点击全屏显示效果

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" applicationComplete="init()">

    <mx:Script>
        <![CDATA[
            import flash.display.StageDisplayState;
            import mx.managers.SystemManager;
            import flash.events.FullScreenEvent;
            private function init():void {
                /* Set up full screen handler. */
                systemManager.stage.addEventListener(FullScreenEvent.FULL_SCREEN, fullScreenHandler);
                dispState = systemManager.stage.displayState;
            }

            private function fullScreenHandler(evt:FullScreenEvent):void {
                dispState = systemManager.stage.displayState + " (fullScreen=" + evt.fullScreen.toString() + ")";
                if (evt.fullScreen) {
                    /* Do something specific here if we switched to full screen mode. */
                } else {
                    /* Do something specific here if we switched to normal mode. */
                }
            }

            private function toggleFullScreen():void {
                try {
                    switch (systemManager.stage.displayState) {
                        case StageDisplayState.FULL_SCREEN:
                            /* If already in full screen mode, switch to normal mode. */
                            systemManager.stage.displayState = StageDisplayState.NORMAL;
                            break;