paint method

@override void paint(Canvas canvas, Paint paint, Size size)

Paint method for the sub class to override and render their loading style

Implementation

@override
void paint(Canvas canvas, Paint paint, Size size) {
  var radius = size.width / 10;
  for (int i = 0; i < 8; i++) {
    canvas.save();
    Offset point = circleAt(
        size.width, size.height, size.width / 2 - radius, i * (pi / 4));
    canvas.translate(point.dx, point.dy);
    canvas.scale(scaleDoubles[i], scaleDoubles[i]);
    paint.color = paint.color.withAlpha(alphas[i]);
    canvas.drawCircle(const Offset(0, 0), radius, paint);
    canvas.restore();
  }
}