package {
	import flash.display.MovieClip;
	public dynamic class Item extends MovieClip {
		public function Item() {
		}
	}
}

//Save the center coordinates of the stage
var centerX:Number=stage.stageWidth/2;
var centerY:Number=stage.stageHeight/2;
 
//The number of items we will have (feel free to change!)
var NUMBER_OF_ITEMS:uint=15;
 
//Radius of the menu circle (horizontal and vertical)
var radiusX:Number=200;
var radiusY:Number=100;
 
//Angle difference between the items (in radians)
var angleDifference:Number = Math.PI * (360 / NUMBER_OF_ITEMS) / 180;
 
//How fast a single circle moves (we calculate the speed
//according to the mouse position later on...)
var angleSpeed:Number=0;
 
//Scaling speed of a single circle
var scaleSpeed:Number=0.0002;
 
//This vector holds all the items
//(this could also be an array...)
var itemVector:Vector.<Item>=new Vector.<Item>;
 
//This loop creates the items and positions them
//on the stage
for (var i:uint = 0; i < NUMBER_OF_ITEMS; i++) {
 
	//Create a new menu item
	var item:Item = new Item();
 
	//Get the angle for the item (we space the items evenly)
	var startingAngle:Number=angleDifference*i;
 
	//Set the x and y coordinates
	item.x=centerX+radiusX*Math.cos(startingAngle);
	item.y=centerY+radiusY*Math.sin(startingAngle);
 
	//Save the starting angle of the item.
	//(We have declared the Item class to be dymamic. Therefore,
	//we can create new properties dynamically.)
	item.angle=startingAngle;
 
	//Add an item number to the item's text field
	item.itemText.text=i.toString();
 
	//Allow no mouse children
	item.mouseChildren=false;
 
	//Add the item to the vector
	itemVector.push(item);
 
	//Add the item to the stage
	addChild(item);
}
 
//We use ENTER_FRAME to animate the items
addEventListener(Event.ENTER_FRAME, enterFrameHandler);
 
//This function is called in each frame
function enterFrameHandler(e:Event):void {
 
	//Calculate the angle speed according to mouse position
	angleSpeed = (mouseX - centerX) / 5000;
 
	//Loop through the vector
	for (var i:uint = 0; i < NUMBER_OF_ITEMS; i++) {
 
		//Save the item to a local variable
		var item:Item=itemVector[i];
 
		//Update the angle
		item.angle+=angleSpeed;
 
		//Set the new coordinates
		item.x=centerX+radiusX*Math.cos(item.angle);
		item.y=centerY+radiusY*Math.sin(item.angle);
 
		//Calculate the vertical distance from centerY to the item
		var dy:Number=centerY-item.y;
 
		//Scale the item according to vertical distance
		item.scaleY = (dy / radiusY);
 
		//If we are above centerY, double the y scale
		if (item.y<centerY) {
			item.scaleY*=2;
		}
 
		//Set the x scale to be the same as y scale
		item.scaleX=item.scaleY;
 
		//Adjust the alpha according to y scale
		item.alpha=item.scaleY+1.1;
 
	}
}