test and improve screen reader accessibility in Preferences

[mixxxbot]

Reported by: ronso0
Date: 2020-06-05T15:39:30Z
Status: Confirmed
Importance: Low
Launchpad Issue: lp1882262
Tags: accessibility, preferences

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there was a heads up on Zulip from a blind DJ again:
https://mixxx.zulipchat.com/#narrow/stream/113295-controller-mapping/topic/Problems.20using.20anMC4000.20controller.20with.20Mixxx

[mixxxbot]

Commented by: ronso0
Date: 2020-09-16T15:33:59Z

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Findings with Orca in Mixxx 2.3 beta on Ubuntu Studio 20.04

opening Preferences, pressing Tab

=========
Live Broadcasting: (* focused widget [spoken text])

• Help [pushbutton]
• Restore Defaults []
• Apply []
• Cancel []
• Okay []
• (appearantly, now the entire inner Pref page has focus (up/down cause scroll moves)
  (pressing Tab a few times, no feedback)
  = stuck. neither Tab nor Shift+Tab move the focus

So IMO a necessary first step is to make sure all pages can be navigated with Tab and arrow keys. From a first look, I think this involves restructuring some page layouts by removing all not strictly necessary wrappers, but also review pages that dynamically populated in C++.

Then we need to assign tabstops to generate a predictable Tab order (this would help ALL users btw).

After that, let's look into https://doc.qt.io/qt-5/qaccessible.html ...

[mixxxbot]

Commented by: ronso0
Date: 2020-10-06T20:51:27Z

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navigation in Broadcasting is fixed in #3156

[mixxxbot]

Commented by: ronso0
Date: 2020-10-06T21:13:28Z

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well, have to say my test wasn't very efficient, mostly due to Orca being unreliable I guess.
Some widgets are described, some aren't. When I reverse the cycle with Shift+Tab, some widgets are described while others described earlier aren't anymore.