SpringButton class
Press physics on a real spring: pointer-down retargets the scale toward the pressed depth, release retargets back with bounce and velocity carry-over - interruptible mid-press like everything else in the system. No timelines, no curves.
The spring itself is motor's SingleMotionController: retargeting with velocity carry-over is built in, so the recipe is three lines.
A real button to the whole input stack, not only the finger: it is focusable, Enter/Space activate it, focus shows as a slight grow on the same spring, and semantics announce a button - inside a morph overlay's focus trap an all-gesture row would leave keyboard users with nothing to land on.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- SpringButton
Constructors
- SpringButton({Key? key, required Widget child, VoidCallback? onPressed, double pressedScale = 0.93})
-
Creates a press-spring wrapper around
child.const
Properties
- child → Widget
-
The button face.
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?
-
Tap handler; null renders the button disabled.
final
- pressedScale → double
-
Scale while the pointer is down.
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< SpringButton> -
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
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited