PanZoomImage

<?xml version="1.0"?>
<s:Image xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark">
    <s:initialize><![CDATA[
            addEventListener(DragGestureEvent.GESTURE_DRAG, gestureDragHandler);
            dragGesture = DragGesture.add(this, {maxTouchPointsCount: 1});

            addEventListener(ZoomGestureEvent.GESTURE_ZOOM, gestureZoomHandler);
            zoomGesture = ZoomGesture.add(this);
        ]]></s:initialize>


    <fx:Script><![CDATA[
        import org.gestouch.events.DragGestureEvent;
        import org.gestouch.events.ZoomGestureEvent;
        import org.gestouch.gestures.DragGesture;
        import org.gestouch.gestures.ZoomGesture;

        private var dragGesture:DragGesture;
        private var zoomGesture:ZoomGesture;

        public static const MAX_SCALE:Number = 3;
        public static const MIN_SCALE:Number = .9;

        private function gestureDragHandler(event:DragGestureEvent):void {
            if(event.phase == GesturePhase.BEGIN) {
            }
            if(event.phase == GesturePhase.UPDATE) {
                x += event.offsetX;
                y += event.offsetY;
            }
            if(event.phase == GesturePhase.END) {
            }
        }

        private function gestureZoomHandler(event:ZoomGestureEvent):void {
            if(event.phase == GesturePhase.BEGIN) {
                dragGesture.cancel();
            }

            if(event.phase == GesturePhase.UPDATE) {
                transformX = event.localX;
                transformY = event.localY;

                scaleX *= event.scaleX;
                scaleY *= event.scaleY;

                if(scaleX > MAX_SCALE) {
                    scaleX = scaleY = MAX_SCALE;
                }
                if(scaleX < MIN_SCALE) {
                    scaleX = scaleY = MIN_SCALE;
                }
            }
            if(event.phase == GesturePhase.END) {
                dragGesture.pickAndContinue(zoomGesture);
            }
        }
        ]]></fx:Script>
</s:Image>