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paulxstretch/deps/juce/docs/Accessibility.md
essej 25bd5d8adb git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce 
subrepo:
  subdir:   "deps/juce"
  merged:   "b13f9084e"
upstream:
  origin:   "https://github.com/essej/JUCE.git"
  branch:   "sono6good"
  commit:   "b13f9084e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"
2022-04-18 17:51:22 -04:00

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JUCE Accessibility

What is supported?

Currently JUCE supports VoiceOver on macOS and Narrator on Windows. The JUCE accessibility API exposes the following to these clients:

  • Title, description, and help text for UI elements
  • Programmatic access to UI elements and text
  • Interaction with UI elements
  • Full UI keyboard navigation
  • Posting notifications to listening clients

Customising Behaviour

By default any visible and enabled Component is accessible to screen reader clients and exposes some basic information such as title, description, help text and its position in the hierarchy of UI elements.

The setTitle(), setDescription() and setHelpText() methods can be used to customise the text that will be read out by accessibility clients when interacting with UI elements and the setExplicitFocusOrder(), setFocusContainerType() and createFocusTraverser() methods can be used to control the parent/child relationships and the order of navigation between UI elements.

Custom Components

For further customisation of accessibility behaviours the AccessibilityHandler class provides a unified API to the underlying native accessibility libraries.

This class wraps a component with a given role specified by the AccessibilityRole enum and takes a list of optional actions and interfaces to provide programmatic access and control over the UI element. Its state is used to convey further information to accessibility clients via the getCurrentState() method.

To implement the desired behaviours for a custom component, subclass AccessibilityHandler and return an instance of this from the Component::createAccessibilityHandler() method.

Further Reading