Gets the size that has been set on the layout, and that determines the total extents of the layout’s scrollbar area. See gtk_layout_set_size ().
location to store the width set on @layout, or %NULL
location to store the height set on @layout, or %NULL
See Implementation
Gets the size that has been set on the layout, and that determines the total extents of the layout’s scrollbar area. See gtk_layout_set_size ().