600048 - Use CSS transitions on progress bar states

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[:Margaret Leibovic]

Movement from one progress state to the next is choppy, so we should use CSS transitions to create a smoother experience.

Comment 1

[Markus Stange [:mstange]]

See also bug 551433.

Using CSS transition for the animation might be tricky. The progress chunk width is set using the flex attribute by C++ code (nsProgressMeterFrame.cpp) based on  the XUL value attribute. So there's not much CSS involved.

Comment 2

[:Margaret Leibovic]

(In reply to comment #1)
> Using CSS transition for the animation might be tricky. The progress chunk
> width is set using the flex attribute by C++ code (nsProgressMeterFrame.cpp)
> based on  the XUL value attribute. So there's not much CSS involved.

Hmm, you're right. I think we thought we could use CSS because we are using CSS to style the appearance of the progressmeter. It seems like bug 551433 addresses the problem we're having with the progress lines, so maybe this bug is a dupe. Is there any reason why work on that stopped?

Comment 3

[Markus Stange [:mstange]]

(In reply to comment #2)
> Is there any reason why work on that stopped?

Other than lack of time, no. Feel free to pick it up if you get to it sooner than I do.

Comment 4

[:Margaret Leibovic]

Given the issues encountered in bug 602126, I feel like using CSS transitions for the progress bars states isn't going to be a solution.

Comment 5

[:Margaret Leibovic]

Bug 602964 makes this invalid.