在AS3中的可拖动对象之间动态绘制矩形

Question

我的目标是突出显示两个可拖动对象inpoint_mc和scrub_outpoint_mc之间的区域，所以我在这些点之间创建了一个矩形，我需要根据拖动点调整此矩形的大小，这表示在Inpoint和Outpoint之间的距离，我尝试了我的水平，不幸的是我可以实现它

private function startScrubbingIN(_arg1:MouseEvent){
        trace("scrubBarIsMovingIN");
        this.cueCard.stage.addEventListener(MouseEvent.MOUSE_UP, this.stopScrubbingIN);
        this.cueCard.stage.addEventListener(MouseEvent.MOUSE_MOVE, this.scrubBarIsMovingIN);
        this.scrubbing = true;
       var _local2:Rectangle = new Rectangle(this.controls_mc.progressBar_mc.x, this.controls_mc.inpoint_mc.y, 
            this.controls_mc.scrub_outpoint_mc.x-this.controls_mc.progressBar_mc.x, 0);
        // now we're limiting in point to current position of out point
        this.controls_mc.inpoint_mc.startDrag(false, _local2);

        this.controls_mc.addChild(_seekIndicator);
        _seekIndicator.graphics.beginFill(0x990000);
        _seekIndicator.graphics.drawRect(this.controls_mc.inpoint_mc.x, this.controls_mc.progressBar_mc.y, 
            this.controls_mc.scrub_outpoint_mc.x-this.controls_mc.progressBar_mc.x, 12);
        trace("_seekIndicator"+ _seekIndicator);
            // _seekIndicator.width = this.controls_mc.scrub_outpoint_mc.x+ this.controls_mc.inpoint_mc.y;
      }

它给我的结果就像附图一样

但红色矩形需要在2点之间收缩

Answer 1

只有在停止拖动或拖动时移动鼠标后才能重绘矩形。不要忘记致电_seekIndicator.graphics.clear()删除旧矩形。最后，使用this.controls_mc.scrub_outpoint_mc.x和this.controls_mc.inpoint_mc.x作为边框，因为您说矩形应位于入点和出点MC之间，而宽度使用this.controls_mc.progressBar_mc.x。

private function scrubBarIsMovingIN(e:MouseEvent):void {
    // the startDrag dragged one of the sliders already
    // existing code skipped, if any
    _seekIndicator.graphics.clear();
    _seekIndicator.graphics.beginFill(0x990000);
    _seekIndicator.graphics.drawRect(this.controls_mc.inpoint_mc.x, this.controls_mc.progressBar_mc.y, 
        this.controls_mc.scrub_outpoint_mc.x-this.controls_mc.inpoint_mc.x, 12);
}

应该这样做。