GtkOverlay is a container which contains a single main child, on top of which it can place “overlay” widgets. The position of each overlay widget is determined by its #GtkWidget:halign and #GtkWidget:valign properties. E.g. a widget with both alignments set to gtk.types.Align.Start will be placed at the top left corner of the GtkOverlay container, whereas an overlay with halign set to gtk.types.Align.Center and valign set to gtk.types.Align.End will be placed a the bottom edge of the GtkOverlay, horizontally centered. The position can be adjusted by setting the margin properties of the child to non-zero values.
Fluent builder for gtk.overlay.Overlay
Fluent builder implementation template for gtk.overlay.Overlay
Module for Overlay class