Warning
gtk_widget_get_requisition has been deprecated since version 3.0 and should not be used in newly-written code. The GtkRequisition cache on the widget was
removed, If you need to cache sizes across requests and allocations,
add an explicit cache to the widget in question instead.
Retrieves the widget's requisition.
This function should only be used by widget implementations in
order to figure whether the widget's requisition has actually
changed after some internal state change (so that they can call
gtk_widget_queue_resize() instead of gtk_widget_queue_draw()).
Normally, gtk_widget_size_request() should be used.
Since 2.20
Warning gtk_widget_get_requisition has been deprecated since version 3.0 and should not be used in newly-written code. The GtkRequisition cache on the widget was removed, If you need to cache sizes across requests and allocations, add an explicit cache to the widget in question instead. Retrieves the widget's requisition. This function should only be used by widget implementations in order to figure whether the widget's requisition has actually changed after some internal state change (so that they can call gtk_widget_queue_resize() instead of gtk_widget_queue_draw()). Normally, gtk_widget_size_request() should be used. Since 2.20