Dropdowns, menus and lists should highlight items in reaction to key presses ("Initial Letter Navigation")

[cbjeukendrup]

Task description
When a dropdown, menu or list is focused, you should be able to type text on the keyboard, to quickly jump to the corresponding item.

For example, in the dropdown shown below,

• when you press S, it should highlight the first item that comes lexicographically after "S", so in this case "Sans Serif Collection".

• when you press S E in quick succession, it should highlight the first item that comes lexicographically after "Se", so in this case "Segoe Fluent Icons".

• when you press S G in quick succession, it should highlight the first item that comes lexicographically after "Sg", so in this case "Showcard Gothic".

Technical note
This will need to be implemented for all QML dropdowns/menus/lists/treeViews.
In Qt Widgets, this already works out of the box (and for those few cases where it doesn't, we shouldn't invest time to fix it since Qt Widgets is going to be replaced eventually anyway).

[Tantacrul]

I agree. I also think you've basically designed it, so no input required from me. Let's do it!

[jmwmusic]

Really hope this one can be addressed as it is standard accessibility practice and makes a significant difference to productivity. Take for example adding the swing item from the tempo palette, currently that takes 31 down arrow presses to get to!

[jmwmusic]

Can I check whether the scope of this issue currently includes palette lists, and if not can that be added?

[jmwmusic]

I think this might be related - Currently screen reader is not announcing the Mnemonic Shortcut options in menus. So for example in the File menu if you arrow down to Open it just says "Open Ctrl O" but would usually say "Open Ctrl O O". But maybe this is deliberate till it is working as currently if I press Alt F O I get stuck in nomans land with no focus, tab & arrow do not work and I have to press Esc to get out of it.

[cbjeukendrup]

I think the Mnemonics issue is unrelated, and it would be preferable to have a separate issue for that. MuseScore uses a custom menu implementation on Windows, so speech for mnemonic shortcuts was probably just not implemented. However, mnemonics themselves should be working correctly. If not, that would be a regression and would deserve an issue on its own.

[re1san]

Hey, I would like to work on it :)

[scorster]

Issue reported here on .org, along with issues with the Up arrow keystroke.