Determinate Progress

class Progress extends StatefulWidget {
  @override
  State<Progress> createState() => _State();
}
 
class _State extends State<Progress> {
  late Timer timer;
  double value = 0.2;
 
  @override
  void initState() {
    super.initState();
    timer = Timer(const Duration(seconds: 1), () => setState(() => value = 0.7));
  }
 
  @override
  void dispose() {
    timer.cancel();
    super.dispose();
  }
 
  @override
  Widget build(BuildContext context) => Column(
    children: [
      FDeterminateProgress(value: value),
      FButton(
        onPress:
            () => setState(() {
              value = 0.2;
              timer.cancel();
              timer = Timer(const Duration(seconds: 1), () => setState(() => value = 0.7));
            }),
        child: const Text('Reset'),
      ),
    ],
  );
}