Infinite progress bar snapping and doesn't loop nicely

[halsten-dev]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

The infinite progressbar is not looping nicely. The bar return at the start before finishing it's animation.

How to reproduce

1. Display an InfiniteProgressBar Widget

Screenshots

Screencast.From.2025-01-19.11-07-10.webm

Example code

ProgBar := widget.NewInfiniteProgressBar()

Fyne version

2.5.3

Go compiler version

go version go1.23.4 linux/amd64

Operating system and version

Manjaro (Linux 6.11.11-1-MANJARO)

Additional Information

No response

[halsten-dev]

It can be seen in the demo app too.

[andydotxyz]

It starts part way into the bar and ends before it has left the bar.
The reason behind this was so you never see an empty bar which could look like a 0% progress.
Were we wrong?

[halsten-dev]

I can understand what you say. But in the case of the infinite progressbar is more about the animation than the progress.

You really like Apple as I understood, their infinite bars are nicely animated. Fyne's linear animation works well for sure but at least, in my opinion, it should loop smoothly. You can avoid an empty bar by doing a ping pong animation that goes back and forth in the bar.

[andydotxyz]

Yes I think that a back and forth could work, it feels slightly better than leaving it empty. With the animation API it should now be as simple as turning on the reversing setting for the animation.

You really like Apple as I understood

Not so much, but they put a lot of effort into UI design and UX ;).

[halsten-dev]

Happy to read that you like the idea.

Not so much, but they put a lot of effort into UI design and UX ;).

Indeed