Feature request - allow RenderCanvas to set position on the screen

[EagleEatApple]

So far, when I run pygfx apps, the window's position on the screen changed every time.
Suggest that add a new method in RenderCanvas class, so the method allows developers control the position on the screen.
In case of glfw, my workaround now is:
if isinstance(canvas, GlfwRenderCanvas):
glfw.set_window_pos(canvas._window, 400, 100)

Thanks.

[Korijn]

You are welcome to open a PR.

If it doesn't work out across the different GUI backends, then your workaround seems like the appropriate solution. If you are building an application using GLFW intentionally, then you can stick to your approach.

[almarklein]

I moved this issue to the rendercanvas repo.

A feature like this falls in the same caregory as set_title() and #33; it's useful API, but not all backends may support it, and for some use-cases its ignored (e.g. when the canvas is embedded in a gui). That said, I would accept a PR that implements this.