ImGui Docking Support

[cshenton]

What would need to be done to support ImGui docking?

Upstream, cimgui appears to have a docking branch, so I imagine it's just a matter of updating the Yggdrasil build script to target the appropriate commits of ImGui and cimgui. However, where I get a bit lost is on how to connect everything together.

Should someone hoping to add this support create PRs in Yggdrasil, CimGui_jll, and this repo? Should those PRs all target a separate branch, or should Yggdrasil's PR target master but in a different subfolder?

[Gnimuc]

Should someone hoping to add this support create PRs in Yggdrasil, CimGui_jll, and this repo?

Only PRs to Yggdrasil and this repo are needed. If you submit a PR to Yggdrasil, XXX_jll will be automatically published or updated.

Should those PRs all target a separate branch, or should Yggdrasil's PR target master but in a different subfolder?

In a different subfolder.

I considered adding docking support a while ago, the main problem is versioning. If we maintain two branches, what version should be used for the docking branch?

[wsphillips]

I think docking and table branches are considered WIP to be eventually added to mainline imgui anyhow?

[Gnimuc]

It looks like the table branch will be merged in the near future, but the docking/viewport branch is still relatively unstable and blocked by a few issues.