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I use gtk3 and gtkmm. I want to move a window on wayland.

Hoever it doesn't seem to be possible. I tried using Gtk::Window::move method and Gdk::Window::move method. I also set type_hint on Gtk::Window and called Gtk::Window::set_transient_for. None of these worked on wayland, it just doesn't move. And also calling Gtk::Window::set_transient_for on the "child-window" makes my TYPE_HINT_DIALOG "child-window" not stay above the main-window anymore, which worked before calling this method.

I read however this in the gtkmm: Gdk::Window Class Reference:

For toplevel windows, window managers may ignore or modify the move; you should probably use gtk_window_move()1 on a Gtk::Window widget anyway, instead of using GDK functions. For child windows, the move will reliably succeed

It says moving child windows works. But I doen't know exaclty what it means by "child windows".

Now I want to know:

  1. Is this true?
  2. How can I make a certain window a child-window of another window in order to move the child window (and is Gtk::Window::set_transient_for the way to go)?
  3. Can I somehow yet move (toplevel) windows with gtk on wayland (with e.g. subsurface or something else)

Note: C-code (gtk-code) is also welcome!

Edit: Just want to note: With Qt5 using app-option "-platform wayland" it's the same. Qt5 doesn't move windows when using wayland.

1 I guess this is an error and it should be Gtk::Window::move(int x, int y)

ArchLinuxTux
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  • Well, have you tried it and what happens? Questions like this get downvotes pretty quick. – theGtknerd Jan 18 '18 at 12:26
  • @theGtknerd thanks for this tip, I added what I tried so far. – ArchLinuxTux Jan 18 '18 at 12:31
  • Could you try a different window manager? I assume this is the problem. If you post an MCVE, I could see if I can duplicate your problem. – theGtknerd Jan 18 '18 at 17:44
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    @theGtknerd you are right, with Xorg it works. However I'd also like to get it working with wayland. I guess with gnome3 there might be many people using wayland. – ArchLinuxTux Jan 19 '18 at 07:33
  • Are you using the same window manager, but switching between Wayland and Xorg? In that case, I would file a bug on Bugzilla. – theGtknerd Jan 19 '18 at 11:42

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