Cannot create Window on Wayland

Tried this on Ubuntu 18.04, with Wayland (before logging in, select Wayland via the little menu next to the unlock button), and installing the glfw lib via sudo apt install libglfw-wayland.

This simple example fails:

import glfw
glfw.init()
# glfw.ERROR_REPORTING = False
w = glfw.create_window(640, 480, "glfw window", None, None)

Traceback:

Traceback (most recent call last):
  File "<tmp 1>", line 4, in <module>
    w = glfw.create_window(640, 480, "glfw window", None, None)
  File "/home/almar/.local/lib/python3.6/site-packages/glfw/__init__.py", line 1141, in create_window
    monitor, share)
  File "/home/almar/.local/lib/python3.6/site-packages/glfw/__init__.py", line 609, in errcheck
    _reraise(exc[1], exc[2])
  File "/home/almar/.local/lib/python3.6/site-packages/glfw/__init__.py", line 45, in _reraise
    raise exception.with_traceback(traceback)
  File "/home/almar/.local/lib/python3.6/site-packages/glfw/__init__.py", line 588, in callback_wrapper
    return func(*args, **kwargs)
  File "/home/almar/.local/lib/python3.6/site-packages/glfw/__init__.py", line 800, in _raise_glfw_errors_as_exceptions
    raise GLFWError(message)
glfw.GLFWError: (65544) b'Wayland: Focusing a window requires user interaction'

If I uncomment the line to ignore errors, it works, except the window is undecorated.

Some context: https://github.com/glfw/glfw/issues/1121 seems to suggest that the error is more of a warning? See also these.

It looks like PyGLFW checks if there are errors and raises them as Python exceptions. Perhaps there should be a filter to ignore specific exceptions like this one?

[FlorianRhiem]

Yes, that keeps backwards compatibility and gives users plenty of options. I’ve added more ERROR_REPORTING options in 8904cbf64e5fe656c898525fc2442a7385609dab:

• True, 'raise' or 'exception': raise an exception
• 'warn' or 'warning': issue a warning
• 'log': log to the ‘glfw’ logger on debug level
• 'ignore' or False: do nothing
• anything else: raise a ValueError about the invalid value of ERROR_REPORTING, including the GLFW error in the message.

[einarf]

@FlorianRhiem deserves a medal or something. It’s the truth.