RectMorphTween class abstract final

Pure-function interpolation helpers for rect-based overlay morph.

Maps progress (0.0 = origin card, 1.0 = fullscreen) to visual properties. All methods are static, side-effect free, and deterministic.

Internally delegates to MorphEngine. The public API is preserved for backward compatibility.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

adjacentCardOpacity(double expandProgress) → double

Opacity for adjacent carousel cards. Fades out during expand.

adjacentCardScale() → double

Scale for adjacent (non-active) carousel cards.

cardContentOpacity(double progress) → double

Card/preview content opacity. Fades out as we approach fullscreen. Staggered: starts fading at 0.25, fully gone by 0.55.

computeCardRect(Size screenSize, {double widthFraction = 0.85, double heightFraction = 0.72}) → Rect

Compute a centered card rect from screen size and dimension fractions.

detailContentOpacity(double progress) → double

Detail/fullscreen content opacity. Fades in from ~0.30 to 0.60.

morphBackgroundScale(double progress, {double minScale = 0.95}) → double

Background scale (slight zoom-out).

morphBlur(double progress, {double maxBlur = 6.0}) → double

Background blur sigma.

morphElevation(double progress, {double baseElevation = 4.0, double peakElevation = 16.0}) → double

Shadow elevation: peaks in the middle of the transition, then drops. At 0.0 → baseElevation, at 0.5 → peakElevation, at 1.0 → 0.0.

morphHeight(double progress, double originHeight, double fullHeight) → double

Interpolated height.

morphLeft(double progress, double originLeft, double fullLeft) → double

Interpolated left position.

morphRadius(double progress, {double maxRadius = 16.0}) → double

Corner radius: maxRadius at origin → 0.0 at fullscreen.

morphRect(double progress, Rect origin, Rect fullscreen) → Rect

Interpolated rect between origin and fullscreen.

morphScrimOpacity(double progress, {double maxOpacity = 0.5}) → double

Scrim (barrier) opacity behind the overlay card.

morphTop(double progress, double originTop, double fullTop) → double

Interpolated top position.

morphWidth(double progress, double originWidth, double fullWidth) → double

Interpolated width.

overlayBackgroundScale(double overlayProgress, double expandProgress, {double minScale = 0.95}) → double

Background scale for the two-phase overlay system.

overlayBlur(double expandProgress, {double maxBlur = 6.0}) → double

Background blur for the overlay (scales with expand progress only).

overlayScrimOpacity(double overlayProgress, double expandProgress, {double maxOpacity = 0.5}) → double

Combined scrim opacity for the two-phase overlay system. Moderate dim during card mode, stronger during fullscreen.