showSliderDialog function Null safety

void showSliderDialog(
  1. {required BuildContext context,
  2. required String title,
  3. required int divisions,
  4. required double min,
  5. required double max,
  6. String valueSuffix = '',
  7. required Stream<double> stream,
  8. required ValueChanged<double> onChanged}
)

Implementation

void showSliderDialog({
  required BuildContext context,
  required String title,
  required int divisions,
  required double min,
  required double max,
  String valueSuffix = '',
  required Stream<double> stream,
  required ValueChanged<double> onChanged,
}) {
  showDialog<void>(
    context: context,
    builder: (context) => AlertDialog(
      title: Text(title, textAlign: TextAlign.center),
      content: StreamBuilder<double>(
        stream: stream,
        builder: (context, snapshot) => SizedBox(
          height: 100.0,
          child: Column(
            children: [
              Text('${snapshot.data?.toStringAsFixed(1)}$valueSuffix',
                  style: const TextStyle(
                      fontWeight: FontWeight.bold,
                      fontSize: 24.0)),
              Slider(
                divisions: divisions,
                min: min,
                max: max,
                value: snapshot.data ?? 1.0,
                onChanged: onChanged,
              ),
            ],
          ),
        ),
      ),
    ),
  );
}