OutlineInputBorder constructor Null safety

const OutlineInputBorder(
  1. {BorderSide borderSide = const BorderSide(),
  2. BorderRadius borderRadius,
  3. double gapPadding}
)

Creates a rounded rectangle outline border for an InputDecorator.

If the borderSide parameter is BorderSide.none, it will not draw a border. However, it will still define a shape (which you can see if InputDecoration.filled is true).

If an application does not specify a borderSide parameter of value BorderSide.none, the input decorator substitutes its own, using copyWith, based on the current theme and InputDecorator.isFocused.

The borderRadius parameter defaults to a value where all four corners have a circular radius of 4.0. The borderRadius parameter must not be null and the corner radii must be circular, i.e. their Radius.x and Radius.y values must be the same.

See also:

Implementation

const OutlineInputBorder({
  BorderSide borderSide = const BorderSide(),
  this.borderRadius = const BorderRadius.all(Radius.circular(4.0)),
  this.gapPadding = 4.0,
}) : assert(borderRadius != null),
     assert(gapPadding != null && gapPadding >= 0.0),
     super(borderSide: borderSide);