TCheckboxGroup<T> class

A group of checkboxes for multiple selection.

TCheckboxGroup provides a multi-select input with:

  • Multiple checkbox selection
  • Keyboard navigation support
  • Validation support
  • Vertical or horizontal layout
  • Value binding with ValueNotifier

Basic Usage

TCheckboxGroup<String>(
  label: 'Select options',
  items: [
    TCheckboxGroupItem(value: 'option1', label: 'Option 1'),
    TCheckboxGroupItem(value: 'option2', label: 'Option 2'),
    TCheckboxGroupItem(value: 'option3', label: 'Option 3'),
  ],
  onValueChanged: (values) => print('Selected: \$values'),
)

With Validation

TCheckboxGroup<String>(
  label: 'Select at least one',
  isRequired: true,
  items: items,
  rules: [
    (values) => values == null || values.isEmpty
        ? 'Please select at least one option'
        : null,
  ],
)

Type parameter:

  • T: The type of values for the checkboxes

See also:

  • TCheckbox for single checkbox
  • TRadioGroup for single selection
Inheritance
Mixed-in types

Constructors

TCheckboxGroup({Key? key, String? label, String? tag, String? helperText, bool isRequired = false, bool disabled = false, TInputFieldTheme? theme, VoidCallback? onTap, FocusNode? focusNode, List<T>? value, ValueNotifier<List<T>?>? valueNotifier, ValueChanged<List<T>?>? onValueChanged, List<String? Function(List<T>?)>? rules, Duration? validationDebounce, List<TCheckboxGroupItem<T>> items = const [], Color? color, bool block = true, bool vertical = false, bool autoFocus = false})
Creates a checkbox group.
const

Properties

autoFocus → bool
Whether to auto-focus the first checkbox.
final
block → bool
Whether to display in block mode.
final
color → Color?
Custom color for the checkboxes.
final
disabled → bool
Whether the field is disabled.
final
focusNode → FocusNode?
Custom focus node.
final
hashCode → int
The hash code for this object.
no setterinherited
helperText → String?
The helper text.
final
isRequired → bool
Whether the field is required.
final
items → List<TCheckboxGroupItem<T>>
The list of checkbox items.
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
label → String?
The label text.
final
onTap → VoidCallback?
Callback for tap events.
final
onValueChanged → ValueChanged<List<T>?>?
Callback fired when the value changes.
final
rules → List<String? Function(List<T>?)>?
List of validation rules.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
tag → String?
The tag text (optional).
final
theme → TInputFieldTheme?
Custom theme.
final
validationDebounce → Duration?
Debounce duration for validation trigger.
final
value → List<T>?
The initial value.
final
valueNotifier → ValueNotifier<List<T>?>?
A ValueNotifier for two-way binding.
final
vertical → bool
Whether to display vertically.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<TCheckboxGroup<T>>
Creates the mutable state for this widget at a given location in the tree.
override
debugDescribeChildren() → List<DiagnosticsNode>
Returns a list of DiagnosticsNode objects describing this node's children.
inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toDiagnosticsNode({String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode
Returns a debug representation of the object that is used by debugging tools and by DiagnosticsNode.toStringDeep.
inherited
toString({DiagnosticLevel minLevel = DiagnosticLevel.info}) → String
A string representation of this object.
inherited
toStringDeep({String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String
Returns a string representation of this node and its descendants.
inherited
toStringShallow({String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String
Returns a one-line detailed description of the object.
inherited
toStringShort() → String
A short, textual description of this widget.
inherited
validateValue(List<T>? value) → List<String>
Validates the given value against the rules.
inherited

Operators

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