Drag and Drop (Snap & Overwrite)

programming flash
1

Hey Guys,

Problem One:

Doing a project at school. Am having trouble with one of my flash examples. Im trying to do a drag and drop system where the user can drag a movie clip into an area. Although i would like to make it snap to a target instead of just sitting wherever it lands in the area.

Problem Two:

The next thing i am trying to do is when the user has a movie clip on a target already, and trys to put another movie clip in that target area, it will replace the one thats in there and go back to its current position.

Here is the script of what i have done so far:

function dragSetup(clip:MovieClip, targ:MovieClip) {
	
	function startDragging(e:MouseEvent):void{
		
		e.target.startDrag();
		e.target.beingDragged=true;
		
		
	}
	
		function stopDragging(e:MouseEvent):void{
		
		stopDrag();
		
		e.target.beingDragged=false; 
		var theDrop:MovieClip
		if (e.target.dropTarget!=null) {

				theDrop=e.target.dropTarget.parent;
				trace(theDrop);
			} else {

				theDrop=null;
			}
		
		
		if (theDrop == targ) {
			e.target.onTarget = true;
			targ.gotoAndStop(2);
		} else {
			e.target.onTarget = false;
			targ.gotoAndStop(1);
		}
		
		
		
	}
	
	clip.addEventListener(MouseEvent.MOUSE_DOWN,startDragging)
	clip.addEventListener(MouseEvent.MOUSE_UP,stopDragging)


	//the variables below will store the clips starting position
	clip.myHomeX = clip.x;
	clip.myHomeY = clip.y;
	//the variables below will store the clips end position
	clip.myFinalX = targ.x;
	clip.myFinalY = targ.y;
	
	function slide(e:Event):void{
		if (!e.target.beingDragged && !e.target.onTarget) {
			e.target.x -= (e.target.x-e.target.myHomeX)/2;
			e.target.y -= (e.target.y-e.target.myHomeY)/2;
			//if the circle is dropped on any part of the target it slides to the center of the target
			
		
		this._x = this.homeX;
		this._y = this.homeY;
	}
		
		
	}
	clip.addEventListener(Event.ENTER_FRAME,slide)
		
}

dragSetup(circle_mc,targetCircle);
dragSetup(circle2_mc,targetCircle);

Thanks Guys, Any help would be appreciated.