findAncestorRenderElementOfExactType<T extends RenderElement> method

@override T? findAncestorRenderElementOfExactType<T extends RenderElement>()

Returns the nearest ancestor render element of the given type T, which must be the type of a concrete RenderElement subclass.

Implementation

@override
T? findAncestorRenderElementOfExactType<T extends RenderElement>() {
  RenderElement? ancestor = _parent;

  var matchType = '$T';

  while (null != ancestor && '${ancestor.runtimeType}' != matchType) {
    ancestor = ancestor._parent;
  }

  if ('${ancestor.runtimeType}' == matchType) {
    return ancestor as T;
  }

  return null;
}