showConfirmationDialog<T> function Null safety

@useResult Future<T?> showConfirmationDialog<T>({required BuildContext context, required String title, String? message, String? okLabel, String? cancelLabel, double? contentMaxHeight, List<AlertDialogAction<T>> actions = const [], T? initialSelectedActionKey, bool barrierDismissible = true, AdaptiveStyle? style, bool useRootNavigator = true, bool shrinkWrap = true, bool fullyCapitalizedForMaterial = true, WillPopCallback? onWillPop, AdaptiveDialogBuilder? builder, RouteSettings? routeSettings})

Show confirmation dialog, whose appearance is adaptive according to platform

For Cupertino, fallback to ActionSheet.

If shrinkWrap is true, material dialog height is determined by the contents. This argument defaults to true. If you know the content height is taller than the height of screen, it is recommended to set to false for performance optimization. if initialSelectedActionKey is set, corresponding action is selected initially. This works only for Android style.

Implementation

@useResult
Future<T?> showConfirmationDialog<T>({
  required BuildContext context,
  required String title,
  String? message,
  String? okLabel,
  String? cancelLabel,
  double? contentMaxHeight,
  List<AlertDialogAction<T>> actions = const [],
  T? initialSelectedActionKey,
  bool barrierDismissible = true,
  AdaptiveStyle? style,
  bool useRootNavigator = true,
  bool shrinkWrap = true,
  bool fullyCapitalizedForMaterial = true,
  WillPopCallback? onWillPop,
  AdaptiveDialogBuilder? builder,
  RouteSettings? routeSettings,
}) {
  final navigator = Navigator.of(
    context,
    rootNavigator: useRootNavigator,
  );
  void pop(T? key) => navigator.pop(key);
  final theme = Theme.of(context);
  final adaptiveStyle = style ?? AdaptiveDialog.instance.defaultStyle;
  return adaptiveStyle.isMaterial(theme)
      ? showModal(
          context: context,
          useRootNavigator: useRootNavigator,
          routeSettings: routeSettings,
          configuration: FadeScaleTransitionConfiguration(
            barrierDismissible: barrierDismissible,
          ),
          builder: (context) {
            final dialog = _ConfirmationMaterialDialog(
              title: title,
              onSelect: pop,
              message: message,
              okLabel: okLabel,
              cancelLabel: cancelLabel,
              actions: actions,
              initialSelectedActionKey: initialSelectedActionKey,
              contentMaxHeight: contentMaxHeight,
              shrinkWrap: shrinkWrap,
              fullyCapitalized: fullyCapitalizedForMaterial,
              onWillPop: onWillPop,
            );
            return builder == null ? dialog : builder(context, dialog);
          },
        )
      : showModalActionSheet(
          context: context,
          title: title,
          message: message,
          cancelLabel: cancelLabel,
          actions: actions.convertToSheetActions(),
          style: style,
          useRootNavigator: useRootNavigator,
          onWillPop: onWillPop,
          builder: builder,
          routeSettings: routeSettings,
        );
}