MaterialExpressiveBorder class

An AndroidX-derived Material 3 Expressive silhouette usable with Material, ShapeDecoration, InkWell.customBorder, and MonetClip.shape.

These are dimensionless motifs, not configurable rounded rectangles: their rounding scales with the available size, not Monet's corner-radius token. By default the normalized unit square is centered and uniformly scaled to the shortest side of the bounds. stretch instead scales each axis to fill the bounds (the same mapping as Compose's RoundedPolygon.toShape).

Like Flutter's StarBorder, stroke placement and the inner path use adjusted bounding rectangles; this is not a geometric offset of concave curves. Supply explicit content padding for lobes/notches. dimensions only accounts for the stroke. Shape changes during interpolation switch at the midpoint; this adapter does not implement AndroidX Morph.

Inheritance

• Object
• ShapeBorder
• OutlinedBorder
• MaterialExpressiveBorder

Constructors

MaterialExpressiveBorder({required MaterialExpressiveShape shape, bool stretch = false, BorderSide side = BorderSide.none})

const

Properties

dimensions → EdgeInsetsGeometry

The widths of the sides of this border represented as an EdgeInsets.

no setter, override

hashCode → int

The hash code for this object.

no setter, override

preferPaintInterior → bool

Reports whether paintInterior is implemented.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

shape → MaterialExpressiveShape

final

side → BorderSide

The border outline's color and weight.

final, inherited

stretch → bool

final

Methods

add(ShapeBorder other, {bool reversed = false}) → ShapeBorder?

Attempts to create a new object that represents the amalgamation of this border and the other border.

inherited

copyWith({BorderSide? side, MaterialExpressiveShape? shape, bool? stretch}) → MaterialExpressiveBorder

Returns a copy of this OutlinedBorder that draws its outline with the specified side, if side is non-null.

override

getInnerPath(Rect rect, {TextDirection? textDirection}) → Path

Create a Path that describes the inner edge of the border.

override

getOuterPath(Rect rect, {TextDirection? textDirection}) → Path

Create a Path that describes the outer edge of the border.

override

lerpFrom(ShapeBorder? a, double t) → ShapeBorder?

Linearly interpolates from another ShapeBorder (possibly of another class) to this.

override

lerpTo(ShapeBorder? b, double t) → ShapeBorder?

Linearly interpolates from this to another ShapeBorder (possibly of another class).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

paint(Canvas canvas, Rect rect, {TextDirection? textDirection}) → void

Paints the border within the given Rect on the given Canvas.

override

paintInterior(Canvas canvas, Rect rect, Paint paint, {TextDirection? textDirection}) → void

Paint a canvas with the appropriate shape.

inherited

scale(double t) → MaterialExpressiveBorder

Creates a copy of this border, scaled by the factor t.

override

toString() → String

A string representation of this object.

inherited

Operators

operator +(ShapeBorder other) → ShapeBorder

Creates a new border consisting of the two borders on either side of the operator.

inherited

operator ==(Object other) → bool

The equality operator.

override