brightnessOf method Null safety

Brightness brightnessOf(
  1. BuildContext context

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

If no CupertinoTheme 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 CupertinoTheme or MediaQuery widgets exist in the ancestry tree.

See also:


static Brightness brightnessOf(BuildContext context) {
  final _InheritedCupertinoTheme? inheritedTheme = context.dependOnInheritedWidgetOfExactType<_InheritedCupertinoTheme>();
  return inheritedTheme? ?? MediaQuery.of(context).platformBrightness;