paint method

@override void paint(Context context, PdfRect box)

Implementation

@override
void paint(Context context, PdfRect box) {
  if (colors.isEmpty) {
    return;
  }

  if (colors.length == 1) {
    context.canvas
      ..setFillColor(colors.first)
      ..fillPath();
  }

  assert(stops == null || stops!.length == colors.length);

  final _focal = focal ?? center;

  final _radius = math.min(box.width, box.height);
  final textDirection = Directionality.of(context);
  context.canvas
    ..saveContext()
    ..clipPath()
    ..applyShader(
      PdfShading(
        context.document,
        shadingType: PdfShadingType.radial,
        boundingBox: box,
        function: PdfBaseFunction.colorsAndStops(
          context.document,
          colors,
          stops,
        ),
        start: _focal.resolve(textDirection).withinRect(box),
        end: center.resolve(textDirection).withinRect(box),
        radius0: focalRadius * _radius,
        radius1: radius * _radius,
        extendStart: true,
        extendEnd: true,
      ),
    )
    ..restoreContext();
}