Adds widget to overlay.
The widget will be stacked on top of the main widget added with gtk.container.Container.add.
The position at which widget is placed is determined from its #GtkWidget:halign and #GtkWidget:valign properties.
a #GtkWidget to be added to the container
Adds widget to overlay.
The widget will be stacked on top of the main widget added with gtk.container.Container.add.
The position at which widget is placed is determined from its #GtkWidget:halign and #GtkWidget:valign properties.