GlassStepper class

A glass-aesthetic numeric stepper matching iOS 26's UIStepper control.

GlassStepper is the Flutter equivalent of iOS 26's UIStepper. It renders a compact horizontal pill with a decrement (−) button on the left, an increment (+) button on the right, and a thin vertical divider between them — all wrapped in a liquid glass material.

Behaviour

  • Tapping − or + calls onChanged with the updated value and fires HapticFeedback.lightImpact.
  • Holding either button triggers auto-repeat after autoRepeatDelay, firing every autoRepeatInterval until released (matching iOS behaviour).
  • At min the − button is visually disabled; at max the + button is disabled (unless wraps is true, in which case the value cycles).
  • Button sides animate to a slightly pressed scale on touch-down.

Value display

iOS 26's native UIStepper does not show the value inside the control — the value is always displayed in a separate label by the app. GlassStepper follows this convention. To show the value, place a Text widget next to it:

Row(
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    Text(
      '$_quantity',
      style: TextStyle(fontSize: 22, color: Colors.white, fontWeight: FontWeight.w600),
    ),
    const SizedBox(width: 16),
    GlassStepper(
      value: _quantity.toDouble(),
      min: 1,
      max: 99,
      onChanged: (v) => setState(() => _quantity = v.toInt()),
    ),
  ],
)

Properties

Property iOS equivalent Default
value value —
min minimumValue 0
max maximumValue 100
step stepValue 1
wraps wraps false
autoRepeat autorepeat true
Inheritance

Constructors

GlassStepper({Key? key, required double value, required ValueChanged<double>? onChanged, double min = 0.0, double max = 100.0, double step = 1.0, bool wraps = false, bool autoRepeat = true, Duration autoRepeatDelay = const Duration(milliseconds: 500), Duration autoRepeatInterval = const Duration(milliseconds: 100), double height = 34.0, double width = 94.0, double dividerWidth = 0.5, LiquidGlassSettings? settings, GlassQuality? quality})
Creates an iOS 26-style glass stepper.
const

Properties

autoRepeat → bool
When true, holding a button fires repeated events like iOS.
final
autoRepeatDelay → Duration
How long to wait after the first tap before auto-repeat begins.
final
autoRepeatInterval → Duration
Interval between auto-repeat firings once they begin.
final
dividerWidth → double
Thickness of the vertical divider between the two buttons.
final
hashCode → int
The hash code for this object.
no setterinherited
height → double
Height of the control. Defaults to 34 logical pixels (matches iOS 26 pt).
final
key → Key?
Controls how one widget replaces another widget in the tree.
finalinherited
max → double
The maximum value. Defaults to 100.
final
min → double
The minimum value. Defaults to 0.
final
onChanged → ValueChanged<double>?
Called when the value changes via tap or auto-repeat.
final
quality → GlassQuality?
Rendering quality. Defaults to GlassQuality.standard.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
settings → LiquidGlassSettings?
Glass effect settings for the pill background.
final
step → double
The amount added/subtracted on each tap. Defaults to 1.
final
value → double
The current numeric value.
final
width → double
Width of the control. Defaults to 94 logical pixels (matches iOS 26 pt).
final
wraps → bool
When true, stepping past max wraps back to min and vice-versa.
final

Methods

createElement() → StatefulElement
Creates a StatefulElement to manage this widget's location in the tree.
inherited
createState() → State<GlassStepper>
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