The application can use this hint to tell the
window manager that a certain surface has modal
behaviour. The window manager can use this information
to handle modal surfaces in a special way.
You should only use this on surfaces for which you have
previously called [method@Gdk.Toplevel.set_transient_for].
Sets the toplevel to be modal.
The application can use this hint to tell the window manager that a certain surface has modal behaviour. The window manager can use this information to handle modal surfaces in a special way.
You should only use this on surfaces for which you have previously called [method@Gdk.Toplevel.set_transient_for].