BorderRadius class Null safety

An immutable set of radii for each corner of a rectangle.

Used by BoxDecoration when the shape is a BoxShape.rectangle.

The BorderRadius class specifies offsets in terms of visual corners, e.g. topLeft. These values are not affected by the TextDirection. To support both left-to-right and right-to-left layouts, consider using BorderRadiusDirectional, which is expressed in terms that are relative to a TextDirection (typically obtained from the ambient Directionality).

Inheritance

Constructors

BorderRadius.all(Radius radius)
Creates a border radius where all radii are radius.
const
BorderRadius.circular(double radius)
Creates a border radius where all radii are Radius.circular(radius).
BorderRadius.horizontal({Radius left = Radius.zero, Radius right = Radius.zero})
Creates a horizontally symmetrical border radius where the left and right sides of the rectangle have the same radii.
const
BorderRadius.only({Radius topLeft = Radius.zero, Radius topRight = Radius.zero, Radius bottomLeft = Radius.zero, Radius bottomRight = Radius.zero})
Creates a border radius with only the given non-zero values. The other corners will be right angles.
const
BorderRadius.vertical({Radius top = Radius.zero, Radius bottom = Radius.zero})
Creates a vertically symmetric border radius where the top and bottom sides of the rectangle have the same radii.
const

Properties

bottomLeft Radius
The bottom-left Radius.
final
bottomRight Radius
The bottom-right Radius.
final
hashCode int
The hash code for this object.
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
topLeft Radius
The top-left Radius.
final
topRight Radius
The top-right Radius.
final

Methods

add(BorderRadiusGeometry other) BorderRadiusGeometry
Returns the sum of two BorderRadiusGeometry objects.
override
copyWith({Radius? topLeft, Radius? topRight, Radius? bottomLeft, Radius? bottomRight}) BorderRadius
Returns a copy of this BorderRadius with the given fields replaced with the new values.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
resolve(TextDirection? direction) BorderRadius
Convert this instance into a BorderRadius, so that the radii are expressed for specific physical corners (top-left, top-right, etc) rather than in a direction-dependent manner.
override
subtract(BorderRadiusGeometry other) BorderRadiusGeometry
Returns the difference between two BorderRadiusGeometry objects.
override
toRRect(Rect rect) RRect
Creates an RRect from the current border radius and a Rect.
toString() String
A string representation of this object.
inherited

Operators

operator %(double other) BorderRadius
Computes the remainder of each corner by the given factor.
override
operator *(double other) BorderRadius
Scales each corner of the BorderRadius by the given factor.
override
operator +(BorderRadius other) BorderRadius
Returns the sum of two BorderRadius objects.
operator -(BorderRadius other) BorderRadius
Returns the difference between two BorderRadius objects.
operator /(double other) BorderRadius
Divides each corner of the BorderRadius by the given factor.
override
operator ==(Object other) bool
The equality operator.
inherited
operator unary-() BorderRadius
Returns the BorderRadius object with each corner negated.
override
operator ~/(double other) BorderRadius
Integer divides each corner of the BorderRadius by the given factor.
override

Static Methods

lerp(BorderRadius? a, BorderRadius? b, double t) BorderRadius?
Linearly interpolate between two BorderRadius objects.
override

Constants

zero → const BorderRadius
A border radius with all zero radii.
BorderRadius.all(Radius.zero)