SpringBuilder class

Animates a double value to new targets using a spring, calling builder on every frame.

Equivalent to motor's SingleMotionBuilder.

When value changes, the spring is redirected to the new target while preserving the current velocity (identical to motor's behaviour). When spring changes, the running simulation is redirected too.

Inheritance
Available extensions

Constructors

SpringBuilder({required double value, required SpringDescription spring, required SpringWidgetBuilder builder, Widget? child, Key? key})
Creates a SpringBuilder.
const

Properties

builder → SpringWidgetBuilder
Builder called on every frame with the current animated value.
final
child → Widget?
Optional pre-built subtree passed through to builder.
final
hashCode → int
The hash code for this object.
no setterinherited
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
spring → SpringDescription
Spring description controlling the animation's stiffness and damping.
final
value → double
Target value the spring animates toward.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<SpringBuilder>
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
glassContextMenu({Key? key, required List<Widget> actions, WidgetBuilder? previewBuilder, bool enabled = true, bool enableHaptics = true, double borderRadius = 32.0, double? previewBorderRadius, double rowBorderRadius = 16.0, BorderRadius? rowCorners, Color? originSlotColor, Color? backgroundColor, LiquidGlassSettings? settings, GlassQuality? quality, double backdropBlur = 0.0, Color? barrierColor, double menuWidth = 250.0, VoidCallback? onOpened, VoidCallback? onDismissed, Duration longPressDuration = const Duration(milliseconds: 700)}) → Widget

Available on Widget, provided by the GlassContextMenuExtension extension

Wraps this widget in a GlassContextMenu displaying actions on long-press or right-click.
glassFullScreenCover({required bool isPresented, VoidCallback? onDismiss, required WidgetBuilder content, bool enableSwipeToDismiss = true, double dismissThreshold = 140.0, LiquidGlassSettings? settings, GlassQuality? quality}) → Widget

Available on Widget, provided by the GlassFullScreenCoverExtension extension

Presents a full-viewport modal cover whenever isPresented is true.

Available on Widget, provided by the GlassNavigationTitleExtension extension

Annotates this widget with a navigation title that drives enclosing or descendant GlassAppBar / GlassAppBar.pinned bars (when their explicit title is null) as well as header accessibility semantics.
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