This is logically more correct since TableView will override width / height anyway to make the delegates fit into the table if they are not as wide/tall as the widest column/row. And it gets even more problematic when we recycle delegates, since in that case we need to keep the original width binding of the delegate to calulate the size of new columns. And this all fits better by using attached properties instead. Change-Id: Ia5f2acd2bfc45f3fb160c3782191ad8da9f780e6 Reviewed-by: Mitch Curtis <mitch.curtis@qt.io> Reviewed-by: J-P Nurmi <jpnurmi@qt.io>