package org.tuio.gestures {

    import flash.display.DisplayObject;
    import flash.geom.Point;
    import org.tuio.TuioEvent;
    import org.tuio.TouchEvent;

    public class CustomDragGesture extends OneFingerMoveGesture {

        public function CustomDragGesture() {
            super();
        }

        public override function dispatchGestureEvent(target:DisplayObject, gsg:GestureStepSequence):void {

            var cursorX:Number = gsg.getTuioContainer("A").x * gsg.getTarget("A").stage.stageWidth;
            var cursorY:Number = gsg.getTuioContainer("A").y * gsg.getTarget("A").stage.stageHeight;

            if (gsg.getValue("offset") == null) {
                var tuioPosition = new Point(cursorX, cursorY);
                var targetPosition:Point = new Point(gsg.getTarget("A").x, gsg.getTarget("A").y);
                gsg.storeValue("offset", tuioPosition.subtract(targetPosition));
            }

            var offsetX:Number = gsg.getValue("offset").x;
            var offsetY:Number = gsg.getValue("offset").y;

            var cursor:Point = new Point(cursorX-offsetX, cursorY-offsetY);

            var data:Object = {"stageX": cursor.x, "stageY": cursor.y};
            gsg.getTarget("A").dispatchEvent(new CustomGestureEvent(CustomGestureEvent.DRAG, data));

            if (gsg.getValue("lP") != null) {
                var velocity:Point = cursor.subtract(gsg.getValue("lP") as Point);
                trace("velocity: " + velocity);
            }

            gsg.storeValue("lP", cursor);
        }

    }

}