onDragEnd method
Implementation
@override
void onDragEnd(LongPressEndDetails details) {
if (widget.controller.touchEventListener != null) {
var point = _getTouchValue(
widget.controller.touchEventListener!.valueType(),
details.globalPosition.dx,
details.globalPosition.dy,
details.localPosition.dx,
details.localPosition.dy);
widget.controller.touchEventListener?.onDragEnd(point.x, point.y);
}
}