ProgressBar does not get redrawn

[matthiasbeyer]

I have a multi-threaded program where I add a ProgressBar with length 100 to a multi bar and then continue to tick() and set_length() the bar (increasing values, as I see in the log output). The bar gets drawn when it initializes, but not afterwards until I finish() it.

How can I debug what's happening here?

Unfortunately, I cannot share the code. Hope you understand and that you can guide me through the process of debugging this anyways!

[matthiasbeyer]

After the finish() call, the bar gets drawn as complete, but it does not redraw the bar but draws a new bar instead. Maybe that's a hint for you what's happening here.

[mibac138]

Do you call MultiProgress::join? When a ProgressBar is connected to a MultiProgress calling ProgressBar::tick sends new data to MultiProgress but the MultiProgress itself needs to be updated as well.

[matthiasbeyer]

I call MultiProgress::join after all threads that have a ProgressBar that was added to the multi-bar are finished (futures are awaited), yes.

[matthiasbeyer]

Do you mean I need to join while updating the progress bars?

[mibac138]

Do you mean I need to join while updating the progress bars?

Yes, you need. That should fix the issue. Keep in mind that join blocks the thread until all ProgressBars have finished.

[matthiasbeyer]

It is really inconvenient that I have to manually wrap the MultiProgress object in an Arc and move it around, then.

[matthiasbeyer]

Hm, the longer I try, the more I get the impression that indicatif is not a good choice for async-await codebases.

[matthiasbeyer]

Okay, I fixed my issue.
Thanks for your support!

[flopacero]

@matthiasbeyer what was your final approach to the problem?

[matthiasbeyer]

Calling MultiProgress::join().

[flopacero]

Right. There's no way around. Just need some tricks giving the blocking nature of MultiProgress::join Thanks!