glfw/opengl on linux wayland - main window has no title bar and cannot be moved or resized properly

[lvraamv]

Hello,
I'm running Pop!_OS 22.04 with wayland and I managed to build the example provided in the docking branch with the glfw + opengl backend without issue. I also disabled multi view ports since it is not currently supported on wayland.

When running the application though I'm facing some issues:

• main window doesn't have a title bar (and no close button) and cannot be moved by dragging,
  

• clicking anywhere on the window border (the white border) resizes the whole window gradually,

• dragging one of the window's side to resize it, resizes another direction (for example, dragging the top border to increase or decrease the window's height, increases its width at the same time, and vice-versa),

• the only way to actually resize the window is by dragging its corner and changing the height and width simultaneously,

• all the other features of the demo window seem to work correctly.

I installed glfw from my package manager: libglfw3, libglfw3-dev, libglfw3-wayland.

I tried going through the issues and discussions but couldn't find anything related to that. I'm getting used to linux and C++ development in general so I'd appreciate any help I can get.

Thanks

[inobelar]

@lvraamv Hello! As you can see, the contents of the window are rendered correctly, so first of all this is not a problem Dear ImGui.

Since you mentioned Pop OS, wayland and glfw - the problem is on their side:

• As far as I can see, Pop OS 22.04 uses GNOME Desktop Environment, so if you don't see problems with other applications (I assuming default uses gtk for window creation & graphics), the problem is most likely in the glfw <--> wayland interop.
• More generally, this resembles a problem with the libdecor library, or its absence. It is she who is responsible for window decoration (title, border, minimze/close buttons) in the wayland environment. Try digging in this direction.

Also 'Dear ImGui', OpenGL, window creation, input handling, event triggering, display via wayland are working for you. glfw as a whole should also work ok, the problem is outside its plane, or glfw is built with the wrong configuration.

This issue definitely does not concern 'Dear ImGui', better ask about it in glfw issues. Or even simply - try to build glfw from sources and next run examples and test to see how them look.

[lvraamv]

@inobelar thank you for the feedback as it helped me find a solution.

The issue seemed to be related to the installed "libglfw3-wayland" package. Since it uses the wayland backend, I assumed it was the package that I needed but, in fact, I had to install the default "libglfw3" package, that uses the x11 backend, instead.

Everything works as expected now. The window has a border and can be moved/resized correctly.
Thanks again!

[inobelar]

@lvraamv Great to see you resolved this! 👍

Please mark this discussion as "resolved" ✅ to reduce the burden on 'Dear ImGui' maintainers.