[FR] Idea for subcategory tree view

[sintech]

Problem
As a part of Bootstrap 5 introduction (#2205), category treeview was removed in favor of "Subcategory tab".
This leads to unnecessary clicks when user wants to change category outside of currently opened branch.

Suggested solution
Add drop-down category list to the header of every part/stock view with the same content as in "subcategory tab". Active category should be highlighted and selected.
This list could be combined with current breadcrumbs.

Mockups:

Describe alternatives you've considered
Restore old category tree view.

Do you want to develop this?
Unfortunately it is above my head.

[matmair]

@SchrodingersGat @eeintech this is not assigned to a milestone. Are we interested in this or wontfix?

[eeintech]

I use this category tree a lot in 0.5.x so yeah I would love to see it restored!

[SchrodingersGat]

I think we should add the category tree back in some form for 0.6.0

[SchrodingersGat]

@eeintech @matmair clearly this was a popular feature! Let's work out a nice way of integrating it back in.

[matmair]

@SchrodingersGat should we solve this with an api powered widget? That could be conditional on when the bar is opened.

[SchrodingersGat]

Yes definitely should be loaded via the API

[matmair]

@SchrodingersGat https://www.jstree.com/docs/json/ combined with an API endpoint seems like a good option. If the tree is visible we can load the root + the current branch and if any other branch is opened the data in that branch is loaded on the fly via ajax.

[matmair]

Working on this feature rn