MorphController class

Unified animation controller for any morph transition.

Drives a single AnimationController from 0.0 (collapsed) → 1.0 (expanded). Supports:

Usage:

late final MorphController _controller;

@override
void initState() {
  _controller = MorphController(vsync: this);
}

// Expand from a rect to fullscreen
_controller.expandFrom(
  origin: origin,
  targetRect: const Rect.fromLTWH(0, 0, 400, 800),
);
Inheritance

Constructors

MorphController({required TickerProvider vsync, Duration expandDuration = const Duration(milliseconds: 420), Duration collapseDuration = const Duration(milliseconds: 350), Curve expandCurve = Curves.easeInOutCubic, Curve collapseCurve = Curves.easeInOutCubic})

Properties

currentRect → Rect?
Interpolated rect at the current progress (origin → target).
no setter
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
isAnimating → bool
no setter
isCollapsed → bool
no setter
isDragging → bool
no setter
isExpanded → bool
no setter
origin → MorphOrigin?
no setter
phase → MorphPhase
no setter
progress → double
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
state → MorphState
no setter
targetRect → Rect?
no setter

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
collapse({Duration? duration, Curve? curve}) → void
Collapse back to origin.
dispose() → void
Discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
override
endDrag(double velocityPxPerSecond, double availableHeight) → void
End the drag and snap based on velocityPxPerSecond.
expand({Duration? duration, Curve? curve}) → void
Public alias for expandFrom without changing origin/target.
expandFrom({MorphOrigin? origin, Rect? targetRect, Duration? duration, Curve? curve}) → void
Begin expansion from origin → targetRect.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
startDrag() → void
Begin an interactive drag session.
toString() → String
A string representation of this object.
inherited
updateDrag(double delta, double availableHeight) → void
Update drag by delta pixels (negative = up/expand, positive = down/collapse).

Operators

operator ==(Object other) → bool
The equality operator.
inherited