brightnessOf static method

Brightness brightnessOf(BuildContext context)

Retrieves the Brightness to use for descendant Arna widgets, based on the value of ArnaThemeData.brightness in the given context.

If no ArnaTheme can be found in the given context, or its brightness is null, it will fall back to MediaQueryData.platformBrightness.

Throws an exception if no valid ArnaTheme or MediaQuery widgets exist in the ancestry tree.

See also:

• maybeBrightnessOf, which returns null if no valid ArnaTheme or MediaQuery exists, instead of throwing.
• ArnaThemeData.brightness, the property takes precedence over MediaQueryData.platformBrightness for descendant Arna widgets.

Implementation

static Brightness brightnessOf(BuildContext context) {
  final _InheritedArnaTheme? inheritedTheme =
      context.dependOnInheritedWidgetOfExactType<_InheritedArnaTheme>();
  return inheritedTheme?.theme.data.brightness ??
      MediaQuery.of(context).platformBrightness;
}