Do NOT toggle outline entry on click

[egrieco]

Body

What are you proposing?

Clicking on an item in the outline sidebar should not automatically change the expanded/collapsed state of the item.

Expanding or Collapsing an item should only happen when clicking on the disclosure triangle to the item's left.

Why does this matter?

Currently, moving to items in the outline panel via click is extremely annoying as any click causes open items to collapse, hiding all of their children. This requires a second click to re-expand the item.

This is counterintuitive and forces the user to perform extra clicks, making the outline panel less useful.

Are there any examples or context?

Not really worth a screen shot. Most other GUI tools do not change the expanded/collapsed state when an item in an outline is clicked.

Possible approach

It might be better to just switch over the behavior entirely, though a preference option would allow users that, for some reason, rely on the current behavior to keep their existing, non-standard workflow.

[egrieco]

This is consistent with the Project Panel i.e. clicking on items toggles their expanded/collapsed state, clicking leaf nodes (files) opens them.

However, there are issues worth considering:

1. The Project Panel does not have disclosure triangles, while the Outline Panel does.
2. Opening/closing a directory in the project panel is equivalent to expanding/collapsing it. So this behavior on click makes sense here.
3. I may want to "jump to" a higher level item in the Outline Panel e.g. a module or trait, rather than simply expanding/collapsing it.
4. Requiring the user to hunt down leaf nodes in the Outline Panel to achieve a single click jump creates a lot of unnecessary friction. Especially since a wrong click requires a second click to undo the state change in the panel.

[egrieco]

Even more annoying is the fact that clicking on a leaf node, even one nested 2 levels deep will toggle the grandparent item's expanded/collapsed state.

This behavior is present in: Zed 0.226.5 (0.226.5+stable)

[nelsonr]

I also find the current behaviour undesirable.

The usefulness of the Outline panel becomes diminished, especially in large files where you might want to just get an overview of the file, like the methods of a class, for example.

It would also be useful to have a simple control to collapse/expand all top level symbols. Currently all symbols start in an expanded state, which makes hard to grasp the overall shape of the file.

Hard to parse	Easy to parse

I believe that further investment in the Outline panel would contribute to an increase of its usefulness, especially in large projects.