build method
Initialize a Notifier
.
It is safe to use Ref.watch
or Ref.listen
inside this method.
If a dependency of this Notifier
(when using Ref.watch
) changes,
then build will be re-executed. On the other hand, the Notifier
will not be recreated. Its instance will be preserved between
executions of build.
If this method throws, reading this provider will rethrow the error.
Implementation
@override
ThemeMode build() {
final backgroundImageObject =
ref.watch(decorationPaletteStateProvider).backgroundImage;
final backgroundImageData =
backgroundImageObject.data as DecorationBackgroundImage;
final backgroundImageFile = backgroundImageData.backgroundImageFile;
if (backgroundImageFile == null) {
return ThemeMode.dark;
}
final data = getThemeFromImage(backgroundImageFile);
return data;
}