/*
 * Copyright 2008 (c) Lance Pollard
 * www.systemsofseven.com/blog
 * www.4ddesignlab.com
 * LanceJPollard@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

package com.fourD.layouts
{
	import com.fourD.animators.TweenMaxAnimator;
	
	import flash.display.DisplayObject;
	import flash.geom.Point;
	
	import mx.components.baseClasses.GroupBase;
	import mx.core.ILayoutElement;
	import mx.core.IUIComponent;
	import mx.layout.LayoutBase;

	public class CircleLayout extends LayoutBase
	{
		public function CircleLayout() {
			super();
		}
		
		public var rotate:Boolean = true;
		
		public function findIndexAt(children:Array, x:Number, y:Number):int {
			var hCenter:Number = target.width / 2;
			var vCenter:Number = target.height / 2;
			var angle:Number = Math.atan2(y-vCenter, x-hCenter) + Math.PI;
			var index:Number = angle * children.length / (2 * Math.PI) + 1;
			
			return index;
		}
		
		override public function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
   		{
        	super.updateDisplayList(unscaledWidth, unscaledHeight);
			var layoutTarget:GroupBase = target;
    		var layoutElement:ILayoutElement;
        	var numOfItems:int = layoutTarget.numLayoutElements;
        	
			var radius:Number = target.width - 10;
			var anglePer:Number = (Math.PI * 2) / numOfItems;
			
			var width:Number = target.width/2;
			var height:Number = target.height/2;
			var offset:Number = 180*(Math.PI/180);
			var rad:Number;
			
			var token:Object;

			for(var i:uint=0; i<numOfItems; i++) {
				
            	layoutElement = layoutTarget.getLayoutElementAt(i);
				token = new Object();
				token.width = layoutElement.getPreferredBoundsWidth();
				token.height = layoutElement.getPreferredBoundsHeight();
					
				var w:Number = width-layoutElement.getPreferredBoundsWidth();
				var h:Number = height-layoutElement.getPreferredBoundsHeight();
				

					rad = ((Math.PI*i)/(numOfItems/2))+offset;
				token.x = (w*Math.cos(rad))+w;
				token.y = (h*Math.sin(rad))+h;
				
				if(rotate) {
					token.rotationY = ((360/length)*i);
					while(token.rotationY > 180) {
						token.rotationY -= 360;
					}
				}
				animator.moveItem(layoutElement as DisplayObject, token);
			}
			//animator.end();
		}
		
	}
}