Circular progress painter (wip)

CircularProgressPainter.dart

class ProgressPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    double percent = 85;
    Paint p = Paint()
      ..color = Colors.white24
      ..style = PaintingStyle.stroke
      ..strokeCap = StrokeCap.round
      ..strokeWidth = 4.0;

    final double inRadians = (pi * 2) / 100;

    Path path = Path();
    path.moveTo(size.width / 2, size.height / 2);
    path.relativeMoveTo(-28.0, 18.0);
    path.relativeLineTo(-19.0, 18.0);
    path.addArc(Rect.fromCircle(center: Offset(size.width / 2, size.height / 2), radius: size.width / 2), 0.8 * pi, 95 * inRadians);
    path.relativeLineTo(20.0, -20.0);
    canvas.drawPath(path, p);

    p.color = Colors.white;
    Path p2 = Path();
    p2.moveTo(size.width / 2, size.height / 2);
    p2.relativeMoveTo(-28.0, 18.0);
    p2.relativeLineTo((min(percent, 5) * -19.0) / 5, (min(percent, 5) * 18.0) / 5);
    if (percent > 5) {
      p2.addArc(Rect.fromCircle(center: Offset(size.width / 2, size.height / 2), radius: size.width / 2), 0.8 * pi, min(percent, 95) * inRadians);
    }
    if (percent > 95) {
      p2.relativeLineTo((95 - percent).abs() * 20.0 / 5, (95 - percent).abs() * -20.0 / 5);
    }
    canvas.drawPath(p2, p);
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) {
    return true;
  }
}