Sets the title of a toplevel window, to be displayed in the titlebar.
If you haven’t explicitly set the icon name for the window
(using Window.setIconName), the icon name will be set to
title as well. title must be in UTF-8 encoding (as with all
user-readable strings in GDK/GTK+). title may not be NULL.
Sets the title of a toplevel window, to be displayed in the titlebar. If you haven’t explicitly set the icon name for the window (using Window.setIconName), the icon name will be set to title as well. title must be in UTF-8 encoding (as with all user-readable strings in GDK/GTK+). title may not be NULL.