form-widgets

name	form-widgets
description	Text fields, switches, pickers, date pickers, and form validation for iOS Design System

Form Widgets Reference

iOS-style input controls with automatic theme adaptation and validation patterns.

CupertinoTextFieldWidget

iOS text input with automatic clear button.

// Basic text field
const CupertinoTextFieldWidget(
  placeholder: 'Enter your name',
)

// With controller
final nameController = useTextEditingController(); // or TextEditingController()

CupertinoTextFieldWidget(
  placeholder: 'Name',
  controller: nameController,
  onChanged: (value) {
    print('Name changed: $value');
  },
)

// Email field
const CupertinoTextFieldWidget(
  placeholder: 'Email',
  keyboardType: TextInputType.emailAddress,
  textInputAction: TextInputAction.next,
)

// Password field
const CupertinoTextFieldWidget(
  placeholder: 'Password',
  obscureText: true,
  keyboardType: TextInputType.visiblePassword,
)

// Multiline
const CupertinoTextFieldWidget(
  placeholder: 'Description',
  maxLines: 5,
  minLines: 3,
)

Default Styling:

• Padding: EdgeInsets.only(left: 16, top: 11, bottom: 11)
• Typography: bodyRegular
• Background: primaryLight / primaryDarkElevated
• Clear button: Shows when editing (suffix mode)

CupertinoSearchTextFieldWidget

Search field with magnifying glass icon.

// Basic search
const CupertinoSearchTextFieldWidget()

// With controller
final searchController = useTextEditingController();

CupertinoSearchTextFieldWidget(
  controller: searchController,
  placeholder: 'Search contacts',
  onChanged: (value) {
    // Filter results
  },
  onSubmitted: (value) {
    // Perform search
  },
)

Default Styling:

• Border radius: 10pt
• Background: defaultFillColors.tertiary
• Icon size: 20pt (search), 18pt (clear)

SwitchWidget

iOS toggle switch.

// Basic switch
SwitchWidget(
  value: true,
  onChanged: (value) {
    print('Switch toggled: $value');
  },
)

// In row
RowWidget.standard(
  title: 'Notifications',
  description: null,
  leftWidget: null,
  rightWidget: SwitchWidget(
    value: _notificationsEnabled,
    onChanged: (value) {
      setState(() => _notificationsEnabled = value);
    },
  ),
  displayDivider: false,
  onPressed: null,
  onLongPress: null,
  decorationCallback: null,
)

// Disabled
SwitchWidget(
  value: true,
  onChanged: null, // Disabled
)

// Custom color
SwitchWidget(
  value: true,
  onChanged: (value) {},
  activeTrackColorCallback: (theme) => theme.defaultColors.systemBlue,
)

// Stocks variant (green when on)
SwitchWidget.stocks(
  value: true,
  onChanged: (value) {},
)

Default Colors:

• Active: systemGreen
• Inactive: fillColors.secondary
• Thumb: systemWhite

PickerButtonWidget

Button displaying selected picker value.

// Date picker button
PickerButtonWidget.dateTime(
  dateTime: DateTime(2020, 6, 20),
  dateFormat: DateFormat.yMMMMd('en_US'), // "June 20, 2020"
  onPressed: () {
    // Show date picker
  },
)

// Time picker button
PickerButtonWidget.dateTime(
  dateTime: DateTime(2020, 6, 20, 13, 30),
  dateFormat: DateFormat.jm(), // "1:30 PM"
  onPressed: () {
    // Show time picker
  },
)

// In a row
RowWidget.standard(
  title: 'Birthday',
  description: null,
  leftWidget: IconWidget.background(
    iconData: CupertinoIcons.calendar,
  ),
  rightWidget: PickerButtonWidget.dateTime(
    dateTime: _selectedDate,
    dateFormat: DateFormat.yMMMMd('en_US'),
    onPressed: () async {
      await CupertinoDatePickerWidget.show(
        context: context,
        mode: CupertinoDatePickerMode.date,
        initialDateTime: _selectedDate,
        onDateTimeChanged: (newDate) {
          setState(() => _selectedDate = newDate);
        },
      );
    },
  ),
  displayDivider: false,
  onPressed: null,
  onLongPress: null,
  decorationCallback: null,
)

CupertinoDatePickerWidget

Full-screen date/time picker with gradients.

// Date picker
await CupertinoDatePickerWidget.show(
  context: context,
  mode: CupertinoDatePickerMode.date,
  initialDateTime: DateTime.now(),
  minimumDate: DateTime(1900),
  maximumDate: DateTime.now(),
  onDateTimeChanged: (newDate) {
    print('Selected date: $newDate');
  },
)

// Time picker
await CupertinoDatePickerWidget.show(
  context: context,
  mode: CupertinoDatePickerMode.time,
  initialDateTime: DateTime.now(),
  use24hFormat: false,
  minuteInterval: 15,
  onDateTimeChanged: (newTime) {
    print('Selected time: $newTime');
  },
)

// Date and time
await CupertinoDatePickerWidget.show(
  context: context,
  mode: CupertinoDatePickerMode.dateAndTime,
  initialDateTime: DateTime.now(),
  minimumDate: DateTime.now(),
  showDayOfWeek: true,
  onDateTimeChanged: (newDateTime) {},
)

// With blur barrier
await CupertinoDatePickerWidget.show(
  context: context,
  mode: CupertinoDatePickerMode.date,
  initialDateTime: DateTime.now(),
  barrierFilter: true,
  onDateTimeChanged: (newDate) {},
)

Modes:

• time - Hours and minutes
• date - Month, day, year
• dateAndTime - All components
• monthYear - Month and year only

CupertinoPickerWidget

Generic scrollable picker for custom options.

// Simple text picker
final options = ['Small', 'Medium', 'Large'];

await CupertinoPickerWidget.show(
  context: context,
  itemExtent: 40,
  initialItem: 1,
  children: options.map((option) {
    return Center(
      child: Text(
        option,
        style: theme.typography.bodyRegular,
      ),
    );
  }).toList(),
  onSelectedItemChanged: (index) {
    print('Selected: ${options[index]}');
  },
)

// With magnifier effect
await CupertinoPickerWidget.show(
  context: context,
  itemExtent: 40,
  useMagnifier: true,
  magnification: 1.2,
  children: List.generate(10, (i) {
    return Center(child: Text('Option ${i + 1}'));
  }),
  onSelectedItemChanged: (index) {},
)

Form Patterns

Profile Form with Hooks

class ProfileForm extends HookWidget {
  const ProfileForm({super.key});

  @override
  Widget build(BuildContext context) {
    final theme = IosTheme.of(context);
    final nameController = useTextEditingController();
    final emailController = useTextEditingController();
    final isValid = useState(false);
    final isLoading = useState(false);

    // Auto-validation
    useEffect(() {
      void validate() {
        isValid.value = nameController.text.isNotEmpty &&
                       emailController.text.contains('@');
      }

      nameController.addListener(validate);
      emailController.addListener(validate);

      return () {
        nameController.removeListener(validate);
        emailController.removeListener(validate);
      };
    }, [nameController, emailController]);

    return Column(
      children: [
        GroupedTableWidget(
          rows: [
            CupertinoTextFieldWidget(
              placeholder: 'Name',
              controller: nameController,
            ),
            CupertinoTextFieldWidget(
              placeholder: 'Email',
              controller: emailController,
            ),
          ],
        ),
        ButtonWidget.label(
          size: const LargeButtonSize(),
          color: const BlueButtonColor(),
          label: 'Save',
          displayCupertinoActivityIndicator: isLoading.value,
          onPressed: !isValid.value || isLoading.value
              ? null
              : () async {
                  isLoading.value = true;
                  await Future.delayed(Duration(seconds: 2));
                  isLoading.value = false;
                },
        ),
      ],
    );
  }
}

Form Validation (Traditional)

class ValidatedFormScreen extends StatefulWidget {
  @override
  State<ValidatedFormScreen> createState() => _ValidatedFormScreenState();
}

class _ValidatedFormScreenState extends State<ValidatedFormScreen> {
  final _emailController = TextEditingController();
  String? _emailError;

  @override
  void dispose() {
    _emailController.dispose();
    super.dispose();
  }

  bool _validate() {
    setState(() {
      if (!_emailController.text.contains('@')) {
        _emailError = 'Please enter a valid email address';
      } else {
        _emailError = null;
      }
    });
    return _emailError == null;
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        GroupedTableWidget.rounded(
          title: const TitleWidget(
            text: 'EMAIL',
            size: TitleSize.small,
          ),
          rows: [
            CupertinoTextFieldWidget(
              placeholder: 'Email',
              controller: _emailController,
              keyboardType: TextInputType.emailAddress,
              onChanged: (_) {
                if (_emailError != null) _validate();
              },
            ),
          ],
          description: _emailError != null
            ? DescriptionWidget(text: _emailError!)
            : null,
        ),
      ],
    );
  }
}

Settings Form

GroupedTableWidget.rounded(
  title: const TitleWidget(
    text: 'PREFERENCES',
    size: TitleSize.small,
  ),
  rows: [
    RowWidget.standard(
      title: 'Notifications',
      description: 'Receive push notifications',
      leftWidget: null,
      rightWidget: SwitchWidget(
        value: _notifications,
        onChanged: (value) => setState(() => _notifications = value),
      ),
      displayDivider: true,
      onPressed: null,
      onLongPress: null,
      decorationCallback: null,
    ),
    RowWidget.standard(
      title: 'Reminder Time',
      description: null,
      leftWidget: null,
      rightWidget: PickerButtonWidget.dateTime(
        dateTime: _reminderTime,
        dateFormat: DateFormat.jm(),
        onPressed: () {
          // Show time picker
        },
      ),
      displayDivider: false,
      onPressed: null,
      onLongPress: null,
      decorationCallback: null,
    ),
  ],
  description: const DescriptionWidget(
    text: 'Notification settings can be changed anytime.',
  ),
)

Best Practices

1. Always dispose controllers in dispose() method (or use hooks)
2. Use const for static placeholders
3. Provide placeholder text for all text fields
4. Set appropriate keyboard types (email, phone, etc.)
5. Use TextInputAction.next to navigate between fields
6. Wrap forms in SingleChildScrollView for keyboard handling
7. Show validation errors in DescriptionWidget below tables
8. Use null for onChanged to make switches non-interactive
9. Set initialDateTime on pickers for better UX
10. Group related fields in same GroupedTableWidget

File Locations

• CupertinoTextFieldWidget: /lib/src/widgets/cupertino_text_field_widget.dart
• CupertinoSearchTextFieldWidget: /lib/src/widgets/cupertino_search_text_field_widget.dart
• SwitchWidget: /lib/src/widgets/switch_widget.dart
• PickerButtonWidget: /lib/src/widgets/picker_button_widget.dart
• CupertinoDatePickerWidget: /lib/src/widgets/cupertino_date_picker_widget.dart
• CupertinoPickerWidget: /lib/src/widgets/cupertino_picker_widget.dart