Detecting Areas by Color : BitmapData : Graphics Flash / Flex / ActionScript examples


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Detecting Areas by Color


 
package {

    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Shape;
    import flash.display.Sprite;
    import flash.display.Loader;
    import flash.net.URLRequest;
    import flash.events.MouseEvent;
    import flash.events.Event;
    import flash.geom.Point;
    import flash.geom.Rectangle;

    public class Main extends Sprite {

        private var _bitmapData:BitmapData;
        private var _loader:Loader = new Loader();
        private var _outline:Shape;

        public function Main () {
            _loader.load(new URLRequest("http://www.navioo.com/samplefiles/image2.jpg"));
            _loader.contentLoaderInfo.addEventListener(Event.COMPLETE, completeHandler);

            addEventListener(MouseEvent.CLICK, clickHandler);

        }

        private function completeHandler(event:Event):void {

            var w:Number = _loader.width;
            var h:Number = _loader.height;

            _bitmapData = new BitmapData(w, h);
            _bitmapData.draw(_loader);

            var bitmap:Bitmap = new Bitmap(_bitmapData);
            var container:Sprite = new Sprite();
            addChild(container);
            container.addChild(bitmap);

            _outline = new Shape();
            addChild(_outline);

        }

        private function clickHandler(event:MouseEvent):void {

            var color:uint = _bitmapData.getPixel32(mouseX, mouseY);
            var rectangle:Rectangle =  _bitmapData.getColorBoundsRect(0xFFFFFFFF, color);
            _outline.graphics.clear();
            _outline.graphics.lineStyle(00x0000001);
            _outline.graphics.drawRect(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
        }
    }
}

        



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