public void Validate() { if (!_layoutEnabled) { return; } if (FillParent && parent != null) { var stage = GetStage(); float parentWidth, parentHeight; if (stage != null && parent == stage.GetRoot()) { parentWidth = stage.GetWidth(); parentHeight = stage.GetHeight(); } else { parentWidth = parent.GetWidth(); parentHeight = parent.GetHeight(); } if (width != parentWidth || height != parentHeight) { SetSize(parentWidth, parentHeight); Invalidate(); } } if (!_needsLayout) { return; } _needsLayout = false; Layout(); }