MorphReveal class

Content choreography: a block unfolds on its own sub-range of the same spring's progress - fade, slide-in, scale, and a vertical "unsquash" from the anchor. Content does not just appear and "be"; it unpacks out of the morph's direction of growth.

The no-overflow guarantee holds by construction: only render transforms are used here (Transform + Opacity). The block's layout is computed once at its final size; no animated constraints, SizeTransition, or heightFactor - the things that throw "RenderFlex overflowed" on every frame.

Like everything in the system it is a pure symmetric function of the spring value: on close the blocks fold back in reverse order, and interruption stays continuous.

Inheritance

Constructors

MorphReveal({Key? key, double from = 0.45, double to = 0.9, Offset slideOffset = const Offset(0, 14), double scaleFrom = 0.96, double squashFrom = 0.85, Alignment alignment = Alignment.topCenter, Curve curve = Curves.easeOut, required Widget child})
Creates a reveal over child on the from..to progress range.
const

Properties

alignment → Alignment
The transform anchor - which edge the block unfolds from. Defaults to the top: content "unpacks" downward, the same direction the morph container grows.
final
child → Widget
The content being revealed; laid out once at its final size.
final
curve → Curve
Shaping curve applied inside the range; a pure function of progress, so interruption continuity holds.
final
from → double
The progress range [from, to] over which the block unfolds. A cascade is built by offsetting the ranges of adjacent blocks.
final
hashCode → int
The hash code for this object.
no setterinherited
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
scaleFrom → double
The block's starting overall scale.
final
slideOffset → Offset
Where the block slides in from (logical pixels).
final
squashFrom → double
The starting "squash": extra vertical compression on top of scaleFrom. 1.0 disables it - the block only scales.
final
to → double
Progress at which the block is fully revealed.
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