InputBorder class

Defines the appearance of an InputDecorator's border.

An input decorator's border is specified by InputDecoration.border.

The border is drawn relative to the input decorator's "container" which is the optionally filled area above the decorator's helper, error, and counter.

Input border's are decorated with a line whose weight and color are defined by borderSide. The input decorator's renderer animates the input border's appearance in response to state changes, like gaining or losing the focus, by creating new copies of its input border with copyWith.

See also:

Implemented by


InputBorder({BorderSide borderSide: BorderSide.none })
Creates a border for an InputDecorator. [...]


borderSide BorderSide
Defines the border line's color and weight. [...]
isOutline bool
True if this border will enclose the InputDecorator's container. [...]
dimensions EdgeInsetsGeometry
The widths of the sides of this border represented as an EdgeInsets. [...]
read-only, inherited
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


copyWith({BorderSide borderSide }) InputBorder
Creates a copy of this input border with the specified borderSide.
paint(Canvas canvas, Rect rect, { double gapStart, double gapExtent: 0.0, double gapPercentage: 0.0, TextDirection textDirection }) → void
Paint this input border on canvas. [...]
add(ShapeBorder other, { bool reversed: false }) ShapeBorder
Attempts to create a new object that represents the amalgamation of this border and the other border. [...]
@protected, inherited
getInnerPath(Rect rect, { TextDirection textDirection }) Path
Create a Path that describes the inner edge of the border. [...]
getOuterPath(Rect rect, { TextDirection textDirection }) Path
Create a Path that describes the outer edge of the border. [...]
lerpFrom(ShapeBorder a, double t) ShapeBorder
Linearly interpolates from another ShapeBorder (possibly of another class) to this. [...]
@protected, inherited
lerpTo(ShapeBorder b, double t) ShapeBorder
Linearly interpolates from this to another ShapeBorder (possibly of another class). [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
scale(double t) ShapeBorder
Creates a copy of this border, scaled by the factor t. [...]
toString() String
Returns a string representation of this object.


operator +(ShapeBorder other) ShapeBorder
Creates a new border consisting of the two borders on either side of the operator. [...]
operator ==(other) bool
The equality operator. [...]


none → const InputBorder
No input border. [...]
const _NoInputBorder()