On Wed, 13 Feb 2019 at 14:55, Peter Weber via gtkmm-list <
[email protected]> wrote:
> Glib::RefPtr<Gdk::Monitor> primary_monitor =
> window->get_screen()->get_display()->get_primary_monitor();
> if (primary_monitor) {
> Gdk::Rectangle monitor_size;
> primary_monitor->get_geometry(monitor_size);
> // adapt size
> width = monitor_size.get_width() / 1.8;
> height = monitor_size.get_height() / 2;
> }
>
> This works on X11 and Windows, but not on Wayland! I've get a nullptr and
> the defaults for width/height are used instead.
>
See https://gitlab.gnome.org/GNOME/gtk/issues/1028 "No monitor reported as
primary by GDK under Wayland"
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