ButtonStyleButton class Null safety

The base StatefulWidget class for buttons whose style is defined by a ButtonStyle object.

Concrete subclasses must override defaultStyleOf and themeStyleOf.

See also:

Inheritance
Implementers

Constructors

ButtonStyleButton({Key? key, required VoidCallback? onPressed, required VoidCallback? onLongPress, required ValueChanged<bool>? onHover, required ValueChanged<bool>? onFocusChange, required ButtonStyle? style, required FocusNode? focusNode, required bool autofocus, required Clip clipBehavior, MaterialStatesController? statesController, required Widget? child})
Abstract const constructor. This constructor enables subclasses to provide const constructors so that they can be used in const expressions.
const

Properties

autofocus bool
True if this widget will be selected as the initial focus when no other node in its scope is currently focused.
final
child Widget?
Typically the button's label.
final
clipBehavior Clip
The content will be clipped (or not) according to this option.
final
enabled bool
Whether the button is enabled or disabled.
read-only
focusNode FocusNode?
An optional focus node to use as the focus node for this widget.
final
hashCode int
The hash code for this object.
@nonVirtual, read-only, inherited
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
onFocusChange ValueChanged<bool>?
Handler called when the focus changes.
final
onHover ValueChanged<bool>?
Called when a pointer enters or exits the button response area.
final
onLongPress VoidCallback?
Called when the button is long-pressed.
final
onPressed VoidCallback?
Called when the button is tapped or otherwise activated.
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
statesController MaterialStatesController?
Represents the interactive "state" of this widget in terms of a set of MaterialStates, like MaterialState.pressed and MaterialState.focused.
final
style ButtonStyle?
Customizes this button's appearance.
final

Methods

createElement() StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() State<ButtonStyleButton>
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.
@protected, inherited
debugFillProperties(DiagnosticPropertiesBuilder properties) → void
Add additional properties associated with the node.
override
defaultStyleOf(BuildContext context) ButtonStyle
Returns a non-null ButtonStyle that's based primarily on the Theme's ThemeData.textTheme and ThemeData.colorScheme.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
themeStyleOf(BuildContext context) ButtonStyle?
Returns the ButtonStyle that belongs to the button's component theme.
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}) 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

Operators

operator ==(Object other) bool
The equality operator.
@nonVirtual, inherited

Static Methods

allOrNull<T>(T? value) MaterialStateProperty<T>?
Returns null if value is null, otherwise MaterialStatePropertyAll<T>(value).
scaledPadding(EdgeInsetsGeometry geometry1x, EdgeInsetsGeometry geometry2x, EdgeInsetsGeometry geometry3x, double textScaleFactor) EdgeInsetsGeometry
Returns an interpolated value based on the textScaleFactor parameter: