Flex 中鼠标进出框体的事件

利用Rectangle的contains或者containsPoint方法，得知鼠标 是否在Rectangle所表示的矩形范围内:

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//rollover指示ROLL_OVER事件，ROLL_OUT事件，rect用于检测的Rectangle，overPoint用于检测MOUSE_MOVE事件
var rollover : Boolean = false;
var rect : Rectangle = new Rectangle(0,200,300);
var overPoint : Point;???????
addEventListener(Event.ENTER_FRAME,enterFrameHandler);

?????????????? private function enterFrameHandler(event : Event) : void {
??????????????????????? var mousePoint : Point = new Point(stage.mouseX,stage.mouseY);
??????????????????????? if(rect.containsPoint(mousePoint)) {
??????????????????????? //鼠标进入rect范围
??????????????????????????????? if(!rollover){
??????????????????????????????????????? //鼠标首次进入rect
??????????????????????????????????????? rollover = true;
??????????????????????????????????????? overPoint = mousePoint;
??????????????????????????????????????? trace("ROLL_OVER");
??????????????????????????????? }else{
??????????????????????????????????????? //鼠标在rect内移动
??????????????????????????????????????? if(overPoint && Point.distance(overPoint,mousePoint) != 0){
??????????????????????????????????????????????? overPoint = mousePoint;
??????????????????????????????????????????????? trace("MOUSE_MOVE");
??????????????????????????????????????? }
??????????????????????????????? }
??????????????????????? }else{
???????????????????????? //鼠标移出rect范围
??????????????????????????????? if(rollover){
??????????????????????????????? //鼠标首次移出rect
??????????????????????????????????????? rollover = false;
??????????????????????????????????????? trace("ROLL_OUT");
??????????????????????????????? }
??????????????????????? }
??????????????? }

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本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/wkyb608/archive/2010/12/03/6051866.aspx