縮放和平移問題（AS3）

Question

我在AS3中使用Pan手勢遇到麻煩。 據我了解，這樣做：

function fl_PanHandler(event:TransformGestureEvent):void
{
    if (escenario.scaleX && escenario.scaleY == 1)
        {
            trace("MAX ZOOM!");
        }
    else
        {
            event.currentTarget.x +=  event.offsetX;
            event.currentTarget.y +=  event.offsetY;
        }
}

好的。 現在，如果我進行縮放，則縮放比例將大於1，這樣我就可以平移了。 但是平底鍋不在我正在縮放的​​MovieClip的外面。

該項目是500x500，因此，我只需要平移500x500而不是使用閃光燈的白色背景（在MC中，500x500的項目具有黑色背景，這就是要平移的MC。

Answer 1

您只需要設置一些約束即可：

var target:DisplayObject = event.currentTarget as DisplayObject;
target.x +=  event.offsetX;
target.y +=  event.offsetY;

//if the x or y is greater than 0, that means you can see the left/top edge of the target, so make it go back to 0
if(target.x > 0) target.x = 0;
if(target.y > 0) target.y = 0;

//the stage width less the target width should be negative so long as the target is bigger than the stage.  
//It will get the x point that would make the right edge line up with the stage's right edge.
if(target.x < stage.stageWidth - target.width){
    //so if the x is less than that point (which would make the right edge of target visible), force the x back so the right edges align
    target.x = stage.stageWidth - target.width;
}

if(target.y < stage.stageHeight - target.height){
    target.y = stage.stageHeight - target.height);
}