Files
calendula/app/src
Jean-Luc Makiolaandmakiolaj cf3c4e96cd
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Add a black theme for AMOLED screens (#181) (#399)
Settings → Appearance → Theme gets a fourth option, Black, next to System, Light and Dark. It's the dark theme with pure black backgrounds, and it works with Material You as well as Calendula's own palette.

- The month cells and the hour grid are `surfaceContainer` tiles on a `surface` ground, so making every container black would erase the grid lines. floret-kit's `toPureBlack()` sets the ground to #000 and scales the containers down to about #13, #1A, #25 and #30. The tiles stay a shade above black, and sheets and menus still stand out from the page.
- Black always means dark. It's an option in the theme picker, so it doesn't follow the system's light/dark setting.
- Event colours read `isSystemInDarkTheme()` in 15 places, so an in-app Dark or Black on a phone in light mode got light-theme tints. They now read `LocalFloretDarkTheme`, the theme's own decision. The bug also affected Dark, so the changelog has a Fixed entry for it.
- The window backdrop came from the night resource qualifier, so an in-app theme flashed the system's light or dark background before the first frame. `WindowThemeCache` keeps a SharedPreferences copy of the theme choice, and `onCreate` reads it to set the backdrop and bar icons. The copy is written when the stored setting loads, so the first cold start after updating still shows the old backdrop.
- Widgets keep their current themes. They get their theme work in the next milestone.

Needs jlmakiola/floret-kit#13, which is merged. The submodule is pinned to its merge commit on floret-kit `main` (`b1905da`).

Tested with new unit tests for the transform and for saving and reloading `BLACK`, and by hand on the emulator.

Closes #181

Co-authored-by: Jean-Luc Makiola <business@jeanlucmakiola.de>
Reviewed-on: https://codeberg.org/jlmakiola/calendula/pulls/399
2026-10-14 17:41:34 +02:00
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