CustomFormController<T> class abstract

A generic form controller for validating any type of form field.

This controller is designed for use with dropdowns, date pickers, and other non-text form fields. It provides validation without text-specific features like formatters, regex filters, or text input types.

Example usage for dropdowns:

enum MyEnum { option1, option2, option3 }

class MyDropdownController extends CustomFormController<MyEnum?> {
  @override
  String? Function(MyEnum? value)? get validator => (value) {
    if (value == null) {
      return 'Please select an option';
    }
    return null;
  };
}

Example usage for date pickers:

class DateController extends CustomFormController<DateTime?> {
  @override
  String? Function(DateTime? value)? get validator => (value) {
    if (value == null) {
      return 'Please select a date';
    }
    if (value.isBefore(DateTime.now())) {
      return 'Date must be in the future';
    }
    return null;
  };
}

Available extensions

• CustomFormControllerExtension

Constructors

CustomFormController()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

helper → CustomFormControllerHelper<T>

late, final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

validator → String? Function(T? value)?

validator A function that validates the input value.

no setter

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

resetErrorTracking() → void

Available on CustomFormController<T>, provided by the CustomFormControllerExtension extension

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited