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 gdk.toplevel.Toplevel.setTransientFor.
true if the surface is modal, false otherwise.
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 gdk.toplevel.Toplevel.setTransientFor.