build method

Future<String?> build(BuildContext context, String? currentKey)

Build the picker.

context is passed BuildContext. currentKey is passed the currently selected key.

ピッカーのビルドを行ないます。

contextにBuildContextが渡されます。currentKeyに現在選択されているキーが渡されます。

Implementation

Future<String?> build(BuildContext context, String? currentKey) async {
  String? res;
  final keys = data.keys.toList();
  final theme = Theme.of(context);
  await _Picker(
    height: 240,
    backgroundColor: backgroundColor ?? theme.colorScheme.surface,
    containerColor: backgroundColor ?? theme.colorScheme.surface,
    headerColor: backgroundColor ?? theme.colorScheme.surface,
    textStyle: TextStyle(color: color ?? theme.colorScheme.onSurface),
    confirmText: confirmText,
    cancelText: cancelText,
    selecteds: [
      keys.indexOf(currentKey ?? defaultKey),
    ],
    adapter: _PickerDataAdapter<String>(
      data: [
        ...keys.map((key) {
          return _PickerItem<String>(
            text: Text(
              data[key] ?? "",
              style: TextStyle(
                color: color ?? theme.colorScheme.onSurface,
              ),
            ),
            value: key,
          );
        })
      ],
    ),
    changeToFirst: true,
    hideHeader: false,
    onConfirm: (_Picker picker, List<int> value) {
      res = keys[value[0]];
    },
  ).showModal(context);
  return res;
}