dd.addSource(new DragAndDrop.Source(flowerImage1) {
            final DragAndDrop.Payload payload = new DragAndDrop.Payload();
            @Override
            public DragAndDrop.Payload dragStart(InputEvent event, float x, float y, int pointer) {
                payload.setDragActor(flowerImage1);
                return payload;
            }

            @Override
            public void dragStop(InputEvent event, float x, float y, int pointer, DragAndDrop.Payload payload, DragAndDrop.Target target) {
                //super.dragStop(event, x, y, pointer, payload, target);
                float lastPosX, lastPosY;
                lastPosX = event.getStageX();
                lastPosY = event.getStageY();
                main.preferences.putFloat("flower1X", lastPosX);
                main.preferences.putFloat("flower1Y", lastPosY);
                main.preferences.flush();
            }
        });