How to drag an image to move it smoothly on screen, with ActionScript?

Question

I was thinking this is a simple task, but I\'m wrong.

I used a sprite to display an image, and when user drag it(MOUSE_DOWN and MOUSE_MOVE), I got the position in

Answer 1

If you're looking for smooth dragging experience, here is a method you could use: (let's say the thing you're dragging is called 'dragee' and this code is in the scope of dragee's parent)

function startDragging():void {
    dragee.addEventListener(Event.ENTER_FRAME,dragUpdate);
}

function stopDragging():void {
    dragee.removeEventListener(Event.ENTER_FRAME,dragUpdate);
}

var decay:Number = .25; //1 is no decay, .1 would be cazy slow

function dragUpdate(e:Event):void {
    dragee.x += decay * (mouseX - dragee.x);
    dragee.y += decay * (mouseY - dragee.y);
}