Menu.setMonitor

Informs GTK+ on which monitor a menu should be popped up. See [gdk.monitor.MonitorWrap.getGeometry].

This function should be called from a #GtkMenuPositionFunc if the menu should not appear on the same monitor as the pointer. This information can’t be reliably inferred from the coordinates returned by a #GtkMenuPositionFunc, since, for very long menus, these coordinates may extend beyond the monitor boundaries or even the screen boundaries.