Flutter Dynamic Custom Painter

Question

I tried to draw a circle sliced and painted based on a dynamic list. I have a back-end that returns a list of group of colors, each group of color must to paint a full circle and each color must to be a slice of the circle.

The back-end response is like this:

"suggestionList": [
    {
        "id": 0,
        "name": "Analogas",
        "colors": [
            {
                "alpha": 255,
                "red": 0,
                "green": 255,
                "blue": 127
            },
            {
                "alpha": 255,
                "red": 1,
                "green": 255,
                "blue": 0
            },
            {
                "alpha": 255,
                "red": 0,
                "green": 255,
                "blue": 255
            }
        ]
    },
    {
        "id": 1,
        "name": "Complementares",
        "colors": [
            {
                "alpha": 255,
                "red": 0,
                "green": 255,
                "blue": 127
            },
            {
                "alpha": 255,
                "red": 255,
                "green": 0,
                "blue": 128
            }
        ]
    },
]

I would like to change colors based group button what I clicked:

Exemplo of circle paint based on color group

Unfortunately I can't pass the list to the paint method dynamically as a parameter, when I fix a sample list on the method, it works fine.

@override
  void paint(Canvas canvas, Size size) {
    List<ColorDTO> colorList = [];
    colorList.add(ColorDTO(alpha: 255, red: 0, green: 255, blue: 127));
    colorList.add(ColorDTO(alpha: 255, red: 127, green: 0, blue: 255));
    colorList.add(ColorDTO(alpha: 255, red: 255, green: 127, blue: 0));

    double wheelSize = 100;
    int nbElem = colorList.length;
    double radius = (2 * pi) / nbElem;

    for (int i = 0; i < colorList.length; i++) {
      canvas.drawPath(
          getWheelPath(wheelSize, radius * i, radius),
          getColoredPaint(Color.fromARGB(colorList[i].alpha, colorList[i].red,
              colorList[i].green, colorList[i].blue)));
    }
  }

How can I do this?