handleResize method

Implementation

void handleResize() {
  RenderBox getBox = listenableKey.currentContext?.findRenderObject() as RenderBox;
  final size = getBox.size;
  final local = getBox.globalToLocal(const Offset(0, 0));

  screen['left'] = local.dx;
  screen['top'] = local.dy;
  screen['width'] = size.width;
  screen['height'] = size.height;
}