TextFormField class

A form field wrapping a single-line text input field.

Dispatches character key presses to update the value, and provides support for placeholder text, customizable style properties, and reverse video visual cursor markers.

Example

TextFormField(
  label: 'Username',
  placeholder: 'Enter username',
  validator: (val) => (val == null || val.isEmpty) ? 'Cannot be empty' : null,
)

Inheritance

Constructors

TextFormField({required String label, String description = '', String? initialValue, String? validator(String?)?, bool focused = false, Style style = Style.empty, Style cursorStyle = const Style(modifiers: Modifier.reverse), String placeholder = '', Style placeholderStyle = const Style(foreground: Color(128, 128, 128))}): Creates a TextFormField for single-line text input.

Properties

description → String: Optional secondary description text for helper information.
finalinherited
errorText ↔ String?: The validation error text if validation fails; otherwise, null.
getter/setter pairinherited
focused ↔ bool: Whether this field currently has input focus.
getter/setter pairinherited
hasError → bool: Returns whether this field currently contains a validation error.
no setterinherited
hashCode → int: The hash code for this object.
no setterinherited
initialValue → String?: The initial value of the field when created or reset.
finalinherited
key → Key?: The optional key for this widget.
finalinherited
label → String: The title label displayed for this field.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
touched ↔ bool: Whether this field has been focused at least once.
getter/setter pairinherited
validator → String? Function(String?)?: A validation function called by FormState.validate. Returns an error message string if invalid, or null if valid.
finalinherited
value ↔ String?: The current value of the form field.
getter/setter pairinherited

Methods

createElement() → Element: Creates an Element to manage this widget's location in the tree.
inherited
createState() → State<StatefulWidget>: Creates the mutable state for this widget at a given location in the tree.
override
getIntrinsicHeight(int width) → int: Computes the intrinsic height of this widget under the given width constraint.
inherited
getPreferredHeight() → int: Calculates preferred layout height needed to render this field cleanly.
override
handleKeyEvent(KeyEvent event) → bool: Handles user key inputs to update the internal value.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
render(Buffer buffer, Rect area) → void: Renders the widget onto the provided buffer within the specified area.
inherited
toString() → String: A string representation of this object.
inherited
validate() → bool: Runs the validator callback against the current field value. Updates errorText and returns whether the field is valid.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited