Replacing gtk_window_set_type_hint in gtk4

[ebassi (Emmanuele Bassi)]

@edscott

But this function is no longer in gtk4. I suppose this is no longer an option as it is X11 specific and gtk4 is targeting a more general approach (just my guess).

That is correct: the windowing system integration for GTK4 (and the foreseeable future) is modelled on Wayland, which is actually easier to translate to other windowing systems than X11; a lot of code in GTK2 and GTK3 amounted to re-implementing X11 concepts on Windows and macOS, with various degrees of success.

@edscott

Is there any easy replacement function call that will do the same?

It depends on what you consider “easy”; the replacement is to call Xlibs API on the window’s native identifier.

@edscott

I have no idea if it will work with Wayland.

It won’t; you must check that the windowing system backend currently running is X11, as the documentation for X11 integration explains:

@edscott

void showWindow(GtkWindow *mainWindow_) {
        GtkWidget *widget = GTK_WIDGET(mainWindow_);
        gtk_widget_realize(widget);

        GdkDisplay *displayGdk = gdk_display_get_default();
#if defined(GDK_WINDOWING_X11)
        if (GDK_IS_X11_DISPLAY(display)) {
            GtkNative *native = gtk_widget_get_native(widget);
            GdkSurface *surface = gtk_native_get_surface(native);
            Window w = gdk_x11_surface_get_xid (surface);
            // ...
        }
#endif

Wayland does not have type hints: windows are windows. If the compositor has different behaviours, it needs to expose a specific interface so that toolkits and/or applications can use it.