Flutter: tough_bikes BikeButtonPainter

main.dart

class BikeButtonPainter extends CustomPainter {
  final fillPaint = Paint()..color = Colors.grey;

  @override
  void paint(Canvas canvas, Size size) {
    // This [Rect] will fill the whole canvas we got
    var fillRect = Rect.fromPoints(Offset.zero, size.bottomRight(Offset.zero));

    canvas.drawRect(
      fillRect,
      fillPaint,
    );
  }

  @override
  bool shouldRepaint(CustomPainter oldDelegate) => false;
}