custom background in python doesn't work

[ShaiAvr]

I am new to this library, but it seems promising for my needs. I want to render a 3D simulation with OpenGL and add ImGUI on top of it. The demo_custom_background.py looked exactly like what I needed, so I copied it and tried to run it, but I got an error:

Traceback (most recent call last):
  File "D:\dev\python\playground\glfw_demo.py", line 670, in <module>
    sys.exit(main())
             ^^^^^^
  File "D:\dev\python\playground\glfw_demo.py", line 659, in main
    runner_params.callbacks.custom_background = lambda: custom_background(app_state)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'imgui_bundle._imgui_bundle.hello_imgui.RunnerCallbacks' object has no attribute 'custom_background'

So, runner_params.callbacks.custom_background doesn't work anymore? How can I make this example run, or find another example for custom OpenGL rendering with ImGUI on top of it?

[pthom]

I’m In the process of integrating this in python. Give me a few days

[ShaiAvr]

Sounds awesome. Can’t wait to see it implemented.

[district10]

👏 Expecting imgui_bundle + vtk (vedo or vispy) as an alternative to open3d (GUI part) or pypangolin.

[ShaiAvr]

At the moment, the only way to use OpenGL rendering is to use an explicit backend like GLFW and not ImmApp or hello_imgui, right?

[pthom]

@ShaiAvr @district10 : The callback custom_background is now available in python.

However, the update was not deployed to pypi yet, so you need to compile imgui_bundle from source:

See instructions here: https://pthom.github.io/imgui_bundle/install-instructions.html

TLDR:

git clone https://github.com/pthom/imgui_bundle.git
cd imgui_bundle
pip install -v .       # this will require a few minutes 

[district10]

works for me. 😎 👍

[ShaiAvr]

Nice. I think I'll use GLFW manually like in imgui_example_glfw_opengl3.py. It will give me more control if I want to do advanced things in the future and I won't depend on immapp or hello_imgui. Not that I have anything against those libraries: they're amazing for quickly making fully functional applications. Keep up this amazing work 😊.

[pthom]

Nice.

Thanks!

I think I'll use GLFW manually like in imgui_example_glfw_opengl3.py. It will give me more control if I want to do advanced things in the future and I won't depend on immapp or hello_imgui.

Just remember that in this case you may have to implement support for HighDPI (depending on your target platform).