LightweightLiquidGlass class
A lightweight, high-performance glass effect widget optimized for scrollable lists and universal platform compatibility.
This widget uses a custom fragment shader to achieve iOS 26 liquid glass aesthetics while being 5-10x faster than BackdropFilter-based approaches.
Lightweight-Specific Parameters:
- glowIntensity: Interactive glow strength (0.0-1.0, button press feedback)
- densityFactor: Elevation physics (0.0-1.0, simulates nested blur darkening)
These parameters are only used by the lightweight shader (Skia/Web). On Impeller, glow is handled by GlassGlow widget and density is not needed.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- LightweightLiquidGlass
- Available extensions
Constructors
-
LightweightLiquidGlass({required Widget child, required LiquidShape shape, LiquidGlassSettings? settings = const LiquidGlassSettings(), double glowIntensity = 0.0, double densityFactor = 0.0, double indicatorWeight = 0.0, GlobalKey<
State< ? backgroundKey, Key? key})StatefulWidget> > -
Creates a lightweight liquid glass effect widget.
const
-
LightweightLiquidGlass.inLayer({required Widget child, required LiquidShape shape, double glowIntensity = 0.0, double densityFactor = 0.0, double indicatorWeight = 0.0, GlobalKey<
State< ? backgroundKey, Key? key})StatefulWidget> > -
Creates a lightweight glass widget that inherits settings from the
nearest ancestor LiquidGlassLayer.
const
Properties
-
backgroundKey
→ GlobalKey<
State< ?StatefulWidget> > -
Optional background capture key.
final
- child → Widget
-
The widget to display inside the glass effect.
final
- densityFactor → double
-
Density factor for elevation physics (Skia/Web only).
final
- glowIntensity → double
-
Interactive glow intensity for button press feedback (Skia/Web only).
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- indicatorWeight → double
-
Thicker, brighter aesthetic for indicators (Skia/Web only).
final
- 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
- settings → LiquidGlassSettings?
-
The glass effect settings.
final
- shape → LiquidShape
-
The shape of the glass surface.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< LightweightLiquidGlass> -
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, 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 displayingactionson 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 wheneverisPresentedis 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 explicittitleis 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
Static Properties
- dummyImage → Image
-
Returns the cached 1×1 transparent dummy image, creating it lazily on demand.
no setter
Static Methods
-
preWarm(
) → Future< void> - Global pre-warm method - loads and compiles the shader program.
-
resetForTesting(
) → void - Resets static shader state for testing. Call between tests to ensure each test gets the fallback rendering (no cached shader).