Widget.getPreferredWidth
void getPreferredWidth(out int minimumWidth, out int naturalWidth)Retrieves a widget’s initial minimum and natural width.
This call is specific to height-for-width requests.
The returned request will be modified by the GtkWidgetClass::adjust_size_request virtual method and by any #GtkSizeGroups that have been applied. That is, the returned request is the one that should be used for layout, not necessarily the one returned by the widget itself.
Parameters
minimumWidth | location to store the minimum width, or null |
naturalWidth | location to store the natural width, or null |