findRenderObject method

@override RenderObject? findRenderObject()

Walks down through component elements until a render-object element is found, returning that render object (or null when this context isn't mounted or has no render-object descendant). Does not establish a dependency.

May return null or stale geometry if called mid-build; use after layout (e.g. from a TuiBinding.addPostFrameCallback) to read the painted size/offset the user just saw.

Implementation

@override
RenderObject? findRenderObject() {
  // A deactivated / unmounted element points at render objects whose
  // geometry is either stale or about to be torn down — surface null
  // instead of leaking a dangling reference.
  if (_lifecycle != _ElementLifecycle.active) return null;
  return _owner?.findRootRenderObject(this);
}