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Implement accessibility APIs via AccessKit (#2294)

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* squash before rebase

* Update AccessKit, introducing support for editable spinners on Windows and an important fix for navigation order on macOS

* Restore support for increment and decrement actions in DragValue

* Avoid VoiceOver race condition bug

* fix clippy lint

* Tell AccessKit that the default action for a text edit (equivalent to a click) is to set the focus. This matters to some platform adapters.

* Refactor InputState functions for AccessKit actions

* Support the AccessKit SetValue for DragValue; this is the only way for a Windows AT to programmatically adjust the value

* Same for Slider

* Properly associate the slider label with both the slider and the drag value

* Lazily activate egui's AccessKit support

* fix clippy lint

* Update AccessKit

* More documentation, particularly around lazy activation

* Tweak one of the doc comments

* See if I can get AccessKit exempted from the 'missing backticks' lint

* Make PlatformOutput::accesskit_update an Option

* Refactor lazy activation

* Refactor node mutation (again)

* Eliminate the need for an explicit is_accesskit_active method, at least for now

* Fix doc comment

* More refactoring of tree construction; don't depend on Arc::get_mut

* Override a clippy lint; I seem to have no other choice

* Final planned refactor: a more flexible approach to hierarchy

* Last AccessKit update for this PR; includes an important macOS DPI fix

* Move and document the optional accesskit dependency

* Fix comment typo

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

* reformat

* More elegant code for conditionally creating a node

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

* Set step to 1.0 for all integer sliders

* Add doc example for Response::labelled_by

* Clarify a TODO comment I left for myself

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
This commit is contained in:
Matt Campbell
2022-12-04 12:17:12 -06:00
committed by GitHub
parent 48666e1d7a
commit e1f348e4b2
28 changed files with 1049 additions and 97 deletions
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CHANGELOG.md
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@@ -24,6 +24,7 @@ NOTE: [`epaint`](crates/epaint/CHANGELOG.md), [`eframe`](crates/eframe/CHANGELOG
* Added `Area::constrain` and `Window::constrain` which constrains area to the screen bounds. ([#2270](https://github.com/emilk/egui/pull/2270)).
* Added `Area::pivot` and `Window::pivot` which controls what part of the window to position. ([#2303](https://github.com/emilk/egui/pull/2303)).
* Added support for [thin space](https://en.wikipedia.org/wiki/Thin_space).
* Added optional integration with [AccessKit](https://accesskit.dev/) for implementing platform accessibility APIs. ([#2294](https://github.com/emilk/egui/pull/2294)).
### Changed 🔧
* Panels always have a separator line, but no stroke on other sides. Their spacing has also changed slightly ([#2261](https://github.com/emilk/egui/pull/2261)).