MorphingSurface class
Base surface widget that renders an animated morphing container.
Handles:
- Rect interpolation (position + size)
- Border radius morph
- Elevation / shadow
- Content crossfade between collapsedBuilder and expandedBuilder
Used internally by MorphingCard and the overlay system.
This widget renders via a positioned Stack and uses Transform + RepaintBoundary for performance isolation — no full widget rebuilds during animation.
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatelessWidget
- MorphingSurface
Constructors
- MorphingSurface({Key? key, required double progress, required Rect startRect, required Rect endRect, required Widget collapsedBuilder(BuildContext context, double progress), required Widget expandedBuilder(BuildContext context, double progress), double startRadius = 16.0, double endRadius = 0.0, double maxElevation = 12.0, Color? surfaceColor, Color? scrimColor, Clip clipBehavior = Clip.antiAlias})
-
const
Properties
- clipBehavior → Clip
-
final
- collapsedBuilder → Widget Function(BuildContext context, double progress)
-
Builds content shown in the collapsed / card state.
final
- endRadius → double
-
Corner radius at progress 1.0.
final
- endRect → Rect
-
The destination bounding rect (global coordinates).
final
- expandedBuilder → Widget Function(BuildContext context, double progress)
-
Builds content shown in the expanded / fullscreen state.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- maxElevation → double
-
Maximum shadow elevation (achieved at ~progress 0.5).
final
- progress → double
-
Morph progress: 0.0 = fully collapsed (at startRect),
1.0 = fully expanded (at endRect).
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- scrimColor → Color?
-
Scrim color. Defaults to semi-transparent black.
final
- startRadius → double
-
Corner radius at progress 0.0.
final
- startRect → Rect
-
The source bounding rect (global coordinates).
final
- surfaceColor → Color?
-
Surface / card background color. Defaults to ColorScheme.surface.
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