Toplevel.setTransientFor
void setTransientFor(gdk.surface.Surface parent)Sets a transient-for parent.
Indicates to the window manager that surface is a transient dialog associated with the application surface parent. This allows the window manager to do things like center surface on parent and keep surface above parent.
See [[gtk.window.Window.setTransientFor]](../gtk4/method.Window.set_transient_for.html) if you’re using GtkWindow.
Parameters
parent | another toplevel [gdk.surface.Surface] |