class Enabled extends StatelessWidget {
  Enabled({Key key,
    @required
    this.enabled,
    @required
    this.child,
  }) : super(key: key);
  final bool enabled;
  final Widget child;

  @override
  Widget build(BuildContext context) {
    return IgnorePointer(ignoring: !enabled, child: Opacity(opacity: enabled ? 1 : 0.5, child: child));
  }
}