BoxDecoration constructor

const BoxDecoration({Color color, DecorationImage image, BoxBorder border, BorderRadiusGeometry borderRadius, List<BoxShadow> boxShadow, Gradient gradient, BlendMode backgroundBlendMode, BoxShape shape: BoxShape.rectangle })

Creates a box decoration.

  • If color is null, this decoration does not paint a background color.
  • If image is null, this decoration does not paint a background image.
  • If border is null, this decoration does not paint a border.
  • If borderRadius is null, this decoration uses more efficient background painting commands. The borderRadius argument must be null if shape is BoxShape.circle.
  • If boxShadow is null, this decoration does not paint a shadow.
  • If gradient is null, this decoration does not paint gradients.
  • If backgroundBlendMode is null, this decoration paints with BlendMode.srcOver

The shape argument must not be null.

Implementation 

const BoxDecoration({
  this.color,
  this.image,
  this.border,
  this.borderRadius,
  this.boxShadow,
  this.gradient,
  this.backgroundBlendMode,
  this.shape = BoxShape.rectangle,
}) : assert(shape != null),
     assert(
       backgroundBlendMode == null || color != null || gradient != null,
       'backgroundBlendMode applies to BoxDecoration\'s background color or '
       'gradient, but no color or gradient was provided.'
     );