GSoC 2017: Accessibility - Week 2

Hello!
This week, I have completed the navigation commands, and have started working on palette navigation.
I'd like to thank everyone who provided feedback on which approach to use to make the palettes keyboard accessible. Adding keyboard shortcuts for every palette symbol did not seem feasible, so the other approach which uses the palette search and palette navigation will be implemented.

Key accomplishments

Completed next-element and prev-element commands:

I removed some remaining bugs from the navigation commands next-element and prev-element. I also commented out some code so that accidentals are skipped while navigating, but if an accidental is selected, navigation from it is possible. The commands seem to work fine now.

Applying selected palette element:

I have added the keyPressEvent and keyReleaseEvent functions in the Palette class, to make applying a palette element possible using the keyboard. After selecting a palette element, pressing Enter or Return will apply the palette element on the score selection.

Selection of next palette element:

I added a case in Palette::keyPressEvent so that on pressing the right arrow key, the next palette element gets selected. This works, but the response is delayed.

Key tasks that stalled

I had trouble building my branch after rebasing it. It took time to fix this. The problem was that I was using an old version of Qt, so I had to get the new version.

Tasks in the upcoming week

• Selection of previous palette element
• Fix the selection of next palette element so that there is no delay
• Add a shortcut command to shift the keyboard focus to the palette search box