Question

flash的AS3拖动代码

怎么把鼠标按下和鼠标释放执行的代码写在一个一个函数里啊，就是把这个集合到一个函数里
function startdrag(evt:MouseEvent):void {
mc.startDrag(true,new Rectangle(20,40,500,300));
}
function stopdrag(evt:MouseEvent):void {
mc.stopDrag();
}
stage.addEventListener(MouseEvent.MOUSE_DOWN,startdrag);
stage.addEventListener(MouseEvent.MOUSE_UP,stopdrag);
function drag(evt:MouseEvent):void {
if (//就是这里应该填什么啊) {
mc.statDrag(true,new Rectangle(50,50,400,400));
evt.updateAfterEvent();
}
else{
mc.stopDrag();
}
}
stage.addEventListener(MouseEvent.MOUSE_DOWN,startdrag);
stage.addEventListener(MouseEvent.MOUSE_UP,startdrag);

Answer 1

var dragging:Boolean=false;
function drag(evt:MouseEvent):void {
if (!dragging) {
dragging=true;
mc.statDrag(true,new Rectangle(50,50,400,400));
evt.updateAfterEvent();
}
else{
dragging=false;
mc.stopDrag();
}
}
stage.addEventListener(MouseEvent.MOUSE_DOWN,startdrag);
stage.addEventListener(MouseEvent.MOUSE_UP,startdrag);