MaterialButton class Null safety

A utility class for building Material buttons that depend on the ambient ButtonTheme and Theme.

This class is planned to be deprecated in a future release. Please use one or more of these buttons and associated themes instead:

The button's size will expand to fit the child widget, if necessary.

MaterialButtons whose onPressed and onLongPress callbacks are null will be disabled. To have an enabled button, make sure to pass a non-null value for onPressed or onLongPress.

To create a button directly, without inheriting theme defaults, use RawMaterialButton.

If you want an ink-splash effect for taps, but don't want to use a button, consider using InkWell directly.

See also:

  • IconButton, to create buttons that contain icons rather than text.
Inheritance

Constructors

MaterialButton({Key? key, required VoidCallback? onPressed, VoidCallback? onLongPress, ValueChanged<bool>? onHighlightChanged, MouseCursor? mouseCursor, ButtonTextTheme? textTheme, Color? textColor, Color? disabledTextColor, Color? color, Color? disabledColor, Color? focusColor, Color? hoverColor, Color? highlightColor, Color? splashColor, Brightness? colorBrightness, double? elevation, double? focusElevation, double? hoverElevation, double? highlightElevation, double? disabledElevation, EdgeInsetsGeometry? padding, VisualDensity? visualDensity, ShapeBorder? shape, Clip clipBehavior = Clip.none, FocusNode? focusNode, bool autofocus = false, MaterialTapTargetSize? materialTapTargetSize, Duration? animationDuration, double? minWidth, double? height, bool enableFeedback = true, Widget? child})
Creates a Material Design button.
const

Properties

animationDuration Duration?
Defines the duration of animated changes for shape and elevation.
final
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?
The button's label.
final
clipBehavior Clip
The content will be clipped (or not) according to this option.
final
color Color?
The button's fill color, displayed by its Material, while it is in its default (unpressed, enabled) state.
final
colorBrightness Brightness?
The theme brightness to use for this button.
final
disabledColor Color?
The fill color of the button when the button is disabled.
final
disabledElevation double?
The elevation for the button's Material relative to its parent when the button is not enabled.
final
disabledTextColor Color?
The color to use for this button's text when the button is disabled.
final
elevation double?
The z-coordinate at which to place this button relative to its parent.
final
enabled bool
Whether the button is enabled or disabled.
read-only
enableFeedback bool
Whether detected gestures should provide acoustic and/or haptic feedback.
final
focusColor Color?
The fill color of the button's Material when it has the input focus.
final
focusElevation double?
The elevation for the button's Material when the button is enabled and has the input focus.
final
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
height double?
The vertical extent of the button.
final
highlightColor Color?
The highlight color of the button's InkWell.
final
highlightElevation double?
The elevation for the button's Material relative to its parent when the button is enabled and pressed.
final
hoverColor Color?
The fill color of the button's Material when a pointer is hovering over it.
final
hoverElevation double?
The elevation for the button's Material when the button is enabled and a pointer is hovering over it.
final
key Key?
Controls how one widget replaces another widget in the tree.
final, inherited
materialTapTargetSize MaterialTapTargetSize?
Configures the minimum size of the tap target.
final
minWidth double?
The smallest horizontal extent that the button will occupy.
final
mouseCursor MouseCursor?
The cursor for a mouse pointer when it enters or is hovering over the button.
final
onHighlightChanged ValueChanged<bool>?
Called by the underlying InkWell widget's InkWell.onHighlightChanged callback.
final
onLongPress VoidCallback?
The callback that is called when the button is long-pressed.
final
onPressed VoidCallback?
The callback that is called when the button is tapped or otherwise activated.
final
padding EdgeInsetsGeometry?
The internal padding for the button's child.
final
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
shape ShapeBorder?
The shape of the button's Material.
final
splashColor Color?
The splash color of the button's InkWell.
final
textColor Color?
The color to use for this button's text.
final
textTheme ButtonTextTheme?
Defines the button's base colors, and the defaults for the button's minimum size, internal padding, and shape.
final
visualDensity VisualDensity?
Defines how compact the button's layout will be.
final

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget.
override
createElement() StatelessElement
Creates a StatelessElement to manage this widget's location in the tree.
inherited
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
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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}) 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