package com.drawingapp.screen
{
	import flash.display.Sprite;
	import flash.display.DisplayObjectContainer;
	import flash.events.Event;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;

	public class Screen extends Sprite
	{
		private var _cursorLayer:DisplayObjectContainer;
		public function get cursorLayer():DisplayObjectContainer { return _cursorLayer; }
		
		private var _uiLayer:DisplayObjectContainer;
		public function get uiLayer():DisplayObjectContainer { return _uiLayer; }
		
		private var _canvasLayer:DisplayObjectContainer;
		public function get canvasLayer():DisplayObjectContainer { return _canvasLayer; }
		
		public function Screen()
		{
			createCanvasLayer();
			createUILayer();
			createCursorLayer();
			
			addEventListener( Event.ADDED_TO_STAGE, prepareStage );
		}
		
		private function prepareStage( event:Event ):void
		{
			stage.align = StageAlign.TOP_LEFT;
			stage.scaleMode = StageScaleMode.NO_SCALE;
			
			stage.frameRate = 60;
		}
		
		private function createCanvasLayer():void
		{
			_canvasLayer = new Sprite();
			addChild( canvasLayer );
		}
		
		private function createUILayer():void
		{
			_uiLayer = new Sprite();
			addChild( uiLayer );
		}
		
		private function createCursorLayer():void
		{
			_cursorLayer = new Sprite();
			cursorLayer.mouseChildren = false;
			cursorLayer.mouseEnabled = false;
			addChild( cursorLayer );
		}
	}
}