ExpressiveButton class
A stock Flutter button with endpoint-safe content layout.
Colors, focus, keyboard activation, semantics and ink remain Flutter's. style controls appearance, but shape, content padding, alignment, sizing, visual density and animation duration are owned here to keep paint and layout coordinates identical. Use padding and constraints instead of style sizing.
Preserve geometry across animation ticks. Both endpoints share one stable
layout; intermediate clipping is allowed. The default overflow policy shrinks
content if the parent will not permit its full size; use error to detect
that situation during development rather than accepting smaller labels.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- ExpressiveButton
Constructors
- ExpressiveButton({Key? key, required ExpressiveShapeGeometry geometry, required VoidCallback? onPressed, required Widget child, ExpressiveButtonVariant variant = ExpressiveButtonVariant.elevated, double progress = 1, bool stretch = false, EdgeInsetsGeometry padding = const EdgeInsets.all(8), double clearance = 5, ExpressiveContentOverflow overflow = ExpressiveContentOverflow.scaleDown, ButtonStyle? style, BoxConstraints constraints = const BoxConstraints(minWidth: 48, minHeight: 48), WidgetStatesController? statesController, FocusNode? focusNode, bool autofocus = false})
-
const
Properties
- autofocus → bool
-
final
- child → Widget
-
final
- clearance → double
-
final
- constraints → BoxConstraints
-
Surface sizing, applied before content fitting. Overrides style sizes.
final
- focusNode → FocusNode?
-
final
- geometry → ExpressiveShapeGeometry
-
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- onPressed → VoidCallback?
-
final
- overflow → ExpressiveContentOverflow
-
final
- padding → EdgeInsetsGeometry
-
final
- progress → double
-
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- statesController → WidgetStatesController?
-
final
- stretch → bool
-
final
- style → ButtonStyle?
-
final
- variant → ExpressiveButtonVariant
-
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.
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
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited