expressive_m3 0.2.0

Material 3 Expressive design tokens, motion and widgets for Flutter — a shape-morphing loading indicator, pull-to-refresh, wavy progress gauge, spring transitions, expressive shapes and the full M3 ty [...]

0.2.0

Adds the Material 3 Expressive components that Flutter doesn't ship yet.

• ExpressiveButtonGroup — connected / spaced group of buttons with a shared shape and spring press.
• ExpressiveSplitButton — a primary action joined to a menu trigger with a rotating chevron.
• ExpressiveFabMenu — an expandable FAB that reveals labelled mini-actions over a scrim (staggered, reduced-motion safe).
• ExpressiveToolbar — floating and docked toolbar treatments, horizontal or vertical.
• ExpressiveWavyLinearProgress — wavy linear progress (determinate + indeterminate, with a stop indicator).
• ExpressiveWavyCircularProgress — a determinate wavy ring.

0.1.0

Initial release.

Motion

• ExpressiveMotion — M3 easing curves + duration tokens with a reduced-motion gate.
• ExpressiveSpringScheme — the M3 spring matrix (spatial/effects × fast/default/slow) as native SpringDescriptions, in expressive and standard presets, plus the SpringDrive.springTo extension.
• MotionSchemeScope — an InheritedWidget that makes the active spring scheme swappable per subtree.
• ExpressivePageTransitionsBuilder / expressivePageTransitionsTheme — shared-axis (X) route transitions with a surface fill (no black flash).
• SpringPagePhysics — spring-settled paged scroll physics.
• TabSwitchTransition — fade-through for top-level destination switches.

Theme tokens

• ExpressiveRadius, ExpressiveSpacing (+ directional inset helpers), ExpressiveElevation (tonal), ExpressiveShapeTokens.
• ExpressiveTextTheme — the M3 2021 type scale, with the ExpressiveTextStyleX extension (tabular, slashedZero, numericId, asLink).
• EmphasizedTextTheme — the M3 emphasized type scale as a ThemeExtension.

Shapes

• ExpressiveShape, ShapeClip, ExpressiveShapeBorder, fitExpressivePath — the M3E polygon shapes (via material_new_shapes) as clips and ShapeBorders.

Widgets

• ExpressiveLoadingIndicator — the M3 shape-morphing loading indicator (with a contained variant).
• ExpressiveRefreshIndicator — pull-to-refresh that shows the shape-morphing indicator instead of the circular spinner.
• CircularWavyProgress — a wavy completion gauge that sweeps on first appearance and on value increase (not on scroll re-mount).
• PressableScale (+ morphingButtonShape) — spring press response.
• ExpressiveLoader — one loader for section and inline loading states.

Haptics

• ExpressiveHaptics — a small, consistent haptic vocabulary.