package {
	import flash.display.Sprite;
	import flash.display.BitmapData;
	import flash.display.Bitmap;
	import flash.events.Event;

	public class Histogram extends Sprite {
		var eBm, hBm:Bitmap;

		var bmd:BitmapData;

		var hHistogram:HHistogram;
		var iHistogram:IHistogram;
		var rgbHistogram:RGBHistogram;

		public function Histogram():void {
			eBm = new Bitmap(new RiverBitmapData(250, 250));
			addChild(eBm);
			hBm = new Bitmap();
			hBm.y = 310;
			addChild(hBm);

			hHistogram = new HHistogram();
			iHistogram = new IHistogram();
			rgbHistogram = new RGBHistogram();

			bmd = new CowsBitmapData(250, 250);

			r1.addEventListener(Event.CHANGE, onEChange);
			r2.addEventListener(Event.CHANGE, onEChange);
			r3.addEventListener(Event.CHANGE, onEChange);
			r4.addEventListener(Event.CHANGE, onEChange);
			r5.addEventListener(Event.CHANGE, onEChange);

			rR.addEventListener(Event.CHANGE, onHChange);
			rG.addEventListener(Event.CHANGE, onHChange);
			rB.addEventListener(Event.CHANGE, onHChange);
			rI.addEventListener(Event.CHANGE, onHChange);
			rH.addEventListener(Event.CHANGE, onHChange);
		}

		function onEChange(event:Event):void {
			if (event.currentTarget == r1) {
				bmd = new CowsBitmapData(250, 250);
			} else if (event.currentTarget == r2) {
				bmd = new Cows2BitmapData(250, 250);
			} else if (event.currentTarget == r3) {
				bmd = new RiverBitmapData(250, 250);
			} else if (event.currentTarget == r4) {
				bmd = new LeatherBitmapData(250, 250);
			} else if (event.currentTarget == r5) {
				bmd = new LenaBitmapData(250, 250);
			} else {
				return;
			}
			eBm.bitmapData = bmd;
		}

		function onHChange(event:Event):void {
			var o:Object;
			if (event.currentTarget == rR) {
				o = rgbHistogram.calculate(bmd, 0);
			} else if (event.currentTarget == rG) {
				o = rgbHistogram.calculate(bmd, 1);
			} else if (event.currentTarget == rB) {
				o = rgbHistogram.calculate(bmd, 2);
			} else if (event.currentTarget == rI) {
				o = iHistogram.calculate(bmd);
			} else if (event.currentTarget == rH) {
				o = hHistogram.calculate(bmd);
			} else {
				return;
			}
			eBm.bitmapData = o.eBmd;
			hBm.bitmapData = o.hBmd;
		}
	}
}