This call can only happen after the @application has started;
typically, you should add new application windows in response
to the emission of the #GApplication::activate signal.
This call is equivalent to setting the #GtkWindow:application
property of @window to @application.
Normally, the connection between the application and the window
will remain until the window is destroyed, but you can explicitly
remove it with gtk_application_remove_window().
GTK+ will keep the @application running as long as it has
any windows.
Adds a window to @application.
This call can only happen after the @application has started; typically, you should add new application windows in response to the emission of the #GApplication::activate signal.
This call is equivalent to setting the #GtkWindow:application property of @window to @application.
Normally, the connection between the application and the window will remain until the window is destroyed, but you can explicitly remove it with gtk_application_remove_window().
GTK+ will keep the @application running as long as it has any windows.