showMaterialNumberPicker function

void showMaterialNumberPicker({
  1. required BuildContext context,
  2. String? title,
  3. required int minNumber,
  4. required int maxNumber,
  5. int? selectedNumber,
  6. int step = 1,
  7. Color? headerColor,
  8. Color? headerTextColor,
  9. Color? backgroundColor,
  10. Color? buttonTextColor,
  11. String? confirmText,
  12. String? cancelText,
  13. double? maxLongSide,
  14. double? maxShortSide,
  15. ValueChanged<int>? onChanged,
  16. VoidCallback? onConfirmed,
  17. VoidCallback? onCancelled,
})

Allows selection of a number via a slot machine carousel

Implementation

void showMaterialNumberPicker({
  required BuildContext context,
  String? title,
  required final int minNumber,
  required final int maxNumber,
  final int? selectedNumber,
  final int step = 1,
  Color? headerColor,
  Color? headerTextColor,
  Color? backgroundColor,
  Color? buttonTextColor,
  String? confirmText,
  String? cancelText,
  double? maxLongSide,
  double? maxShortSide,
  ValueChanged<int>? onChanged,
  VoidCallback? onConfirmed,
  VoidCallback? onCancelled,
}) {
  List<String> items = [];

  for (int i = minNumber; i <= maxNumber; i += step) {
    items.add(i.toString());
  }

  showDialog<String>(
    context: context,
    builder: (BuildContext context) {
      return ScrollPickerDialog(
        items: items,
        values: items, // items and vales are the same
        title: title,
        initialValue: selectedNumber.toString(),
        headerColor: headerColor,
        headerTextColor: headerTextColor,
        backgroundColor: backgroundColor,
        buttonTextColor: buttonTextColor,
        confirmText: confirmText,
        cancelText: cancelText,
        maxLongSide: maxLongSide,
        maxShortSide: maxLongSide,
      );
    },
  ).then((selection) {
    if (onChanged != null && selection != null) onChanged(int.parse(selection));
    if (onCancelled != null && selection == null) onCancelled();
    if (onConfirmed != null && selection != null) onConfirmed();
  });
}