Improve one task quickpick behavior

[alexr00]

#40508 (comment)

[alexr00]

@chrmarti I'm not sure this will work. The previous quick pick is the command palette. Is there any better way to do this than with a cancellation token(which is what I'm doing now)?

[chrmarti]

I don't think there is. The problem with the current approach is that the QuickPick already opens with a progress indicator expecting the list items to become available. So there will always be either a flicker or the QuickPick showing a single element.

One alternative could be to wait for the list to resolve for a few hundred milliseconds before opening the QuickPick and not open it if the list resolves with a single element before that timer expires.

If that doesn't help also consider going back to a single element QuickPick. Or maybe there is a valuable addition to the list you haven't implemented yet?

If the command palette knew that the command might open a QuickPick, it could just stay open with a progress indicator, but that needs more thought on how to implement and might be best addressed after the command palette has moved over to use the QuickInput widget.

[alexr00]

The flashing quick pick only happens if you toggle the setting to skip the quick pick when there's only one task (not default), so I think it's ok to leave since the value gained is a run experience with fewer clicks.

The few hundred milliseconds wait is a nice idea. I think that will take care of most cases because when there is only one task it is likely to be quick anyway.

[alexr00]

Actually already verified by @connor4312