AnimatedGlassIndicator class
A shared component that renders the interactive "Jelly" indicator used in GlassTabBar, GlassSegmentedControl, and GlassBottomBar.
Handles:
- Jelly physics (squash and stretch)
- Thickness-based crossfade between background and glass
- Positioning and expansion
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- AnimatedGlassIndicator
Constructors
-
AnimatedGlassIndicator({Key? key, required double velocity, required int itemCount, required AlignmentGeometry alignment, required double thickness, required GlassQuality quality, required Color indicatorColor, required bool isBackgroundIndicator, double borderRadius = GlassDefaults.capsuleRadius, LiquidGlassSettings? settings, EdgeInsetsGeometry padding = EdgeInsets.zero, EdgeInsetsGeometry expansion = const EdgeInsets.all(8.0), GlobalKey<
State< ? backgroundKey, bool paintBackground = true, bool paintGlass = true, double? exactWidth, double? exactOffset, List<StatefulWidget> >BoxShadow> ? shadows, double pinchStrength = 1.0, double innerBlur = 0.0, Axis direction = Axis.horizontal}) -
Creates a new AnimatedGlassIndicator.
const
Properties
- alignment → AlignmentGeometry
-
Current alignment of the indicator.
final
-
backgroundKey
→ GlobalKey<
State< ?StatefulWidget> > -
Optional background key for Skia/Web refraction
final
- borderRadius → double
-
Corner radius of the indicator pill.
final
- direction → Axis
-
Axis along which fixed-size indicators travel.
final
- exactOffset → double?
-
Optional exact offset from the left (bypasses alignment).
Used in scrollable mode where tabs have different widths.
final
- exactWidth → double?
-
Optional exact width for varying tab sizes (bypasses widthFactor).
Used in scrollable mode where tabs have different widths.
final
- expansion → EdgeInsetsGeometry
-
How much to expand the indicator during drag.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- indicatorColor → Color
-
Base color for the indicator (used for background mode).
final
- innerBlur → double
-
Sigma of the backdrop blur painted behind the RESTING selected pill
(Apple-style "frost at rest"). Scaled internally by the resting opacity so
it is full when settled and fades out as the pill morphs into the
liquid-glass lens during a drag/tap — keeping motion crisp.
0.0(default) disables it. Only renders on the background-painting indicator (paintBackground == true); reads through a translucent indicatorColor.final - isBackgroundIndicator → bool
-
Whether this is the background (non-glass) pass.
final
- itemCount → int
-
Number of items (tabs/segments).
final
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- padding → EdgeInsetsGeometry
-
Padding to apply around the indicator (e.g., for GlassBottomBar).
final
- paintBackground → bool
-
Whether to render the solid background color pass.
final
- paintGlass → bool
-
Whether to render the glass effect shader pass.
final
- pinchStrength → double
-
Maximum concave lens pinch strength for the active indicator pill.
final
- quality → GlassQuality
-
Rendering quality (standard/premium).
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- settings → LiquidGlassSettings?
-
Optional glass settings override.
final
-
shadows
→ List<
BoxShadow> ? -
Optional shadows for the solid background indicator.
final
- thickness → double
-
Animation value (0.0 to 1.0) indicating drag state.
0 = resting, >0 = dragging/animating.
final
- velocity → double
-
Current velocity of the drag gesture.
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
Constants
- baseIndicatorSettings → const LiquidGlassSettings
- The iOS 26-calibrated default glass settings for all indicator pills.