getLocationOnScreen static method

Future<void> getLocationOnScreen(RenderViewModel viewModel, VoltronArray array, Promise? promise)

Implementation

static Future<void> getLocationOnScreen(
    RenderViewModel viewModel, VoltronArray array, Promise? promise) async {
  if (promise == null) {
    return;
  }
  var rootViewModel = viewModel.context.rootViewModelMap[viewModel.rootId];
  var renderObject =
      viewModel.currentContext?.findRenderObject() as RenderBox?;
  var rootRenderObject =
      rootViewModel?.currentContext?.findRenderObject() as RenderBox?;
  var x = 0.0;
  var y = 0.0;
  var width = 0.0;
  var height = 0.0;
  if (renderObject == null || rootRenderObject == null) {
    promise.reject("this view or root view is null");
  } else {
    var rootPosition = rootRenderObject.localToGlobal(Offset.zero);
    var rootX = rootPosition.dx;
    var rootY = rootPosition.dy;

    var position = renderObject.localToGlobal(Offset.zero);
    var size = renderObject.size;

    x = position.dx - rootX;
    y = position.dy - rootY;
    width = size.width;
    height = size.height;
  }

  final resultMap = VoltronMap();
  resultMap.push(kXOnScreen, x.toInt());
  resultMap.push(kYOnScreen, y.toInt());
  resultMap.push(kViewWidth, width.toInt());
  resultMap.push(kViewHeight, height.toInt());
  promise.resolve(resultMap);
}