Question

我有一个应用程序，用户上传图像，然后通过单击，拖动和使用调整大小栏来转换图像。但是我的客户要求我限制用户可以拖动到的位置，这不是问题，除了我需要限制的方式与正常情况相反。

所以我的startDrag（假，新的Rectangle ......）工作得很好，但我需要的是让用户能够在边界之外拖动而不会在flash的内部有空白区域文件。

我的意思是说我有一个500px宽的闪存文件和里面的图像，我不小心拖了一下。如果图像右手边缘（如果我向左拖动）达到500px则停止拖动并且不允许它们向左拉动它。

我真的希望我已经很好地解释了这一点，任何指导都会很棒！

以下是我目前用于拖动事件的代码。

任何帮助都会非常感激。

public function startImageDrag (e:MouseEvent):void {
        mousePos['x'] = e.target.mouseX;
        mousePos['y'] = e.target.mouseY;
        imageDraggable.removeEventListener(MouseEvent.MOUSE_DOWN, function ():void {});
        photoapp.cStage.addEventListener(MouseEvent.MOUSE_MOVE, moveImage);
        photoapp.cStage.addEventListener(MouseEvent.MOUSE_UP, endImageDrag);
    }
    //The type is wildcarded because I have this hooked to MOUSE_LEAVE too
    public function endImageDrag (e:*):void {
        photoapp.cStage.removeEventListener(MouseEvent.MOUSE_MOVE, moveImage);
        photoapp.cStage.addEventListener(MouseEvent.MOUSE_DOWN, startImageDrag);
    }

    public function moveImage(event:MouseEvent):void {
        //Get the offset of the current mouse position over the image
        var
            //The mouse position on the stage
            sxOff:Number = photoapp.cStage.mouseX,
            syOff:Number = photoapp.cStage.mouseY,
            //The position on which the mouse down event was on the image
            reX:Number = sxOff - mousePos['x'],
            reY:Number = syOff - mousePos['y'],
            //The iamge object
            i:DisplayObject = imageDraggable;

        //Move the image
        if (/*I have no idea now...*/) {
            imageDraggable.x = reX;
        }
        if (iY) {
            imageDraggable.y = reY;
        }

        event.updateAfterEvent();
    }

Answer 1

// this code will limit the movement to 100 pixels to the right
var bounds:Rectangle = new Rectangle( 0,0,100,0)
imageDraggable.startDrag( false,bounds );

[编辑]
也许这会帮助你更多地理解

var boundsWidth:Number  = stage.stageWidth  - pictureHolderMC.width );
var boundsHeight:Number = stage.stageHeight - pictureHolderMC.height );
var bounds:Rectangle = new Rectangle(0, 0, boundsWidth, boundsHeight);
pictureHolderMC.startDrag(false, bounds);

ActionScript拖动限制，向后？

1 个答案: