Documentation for adding colored RectItem not clear

[isaacgerg]

I would like to add several classes which are colored differently using the RectItem as a base class. However, I cannot get any of them to work after following the instructions. Is there an example somewhere of how to do this? I am running into dependency issues (e.g. Can't find my new class or classes derived from it).

        return QRectF(float(model_item[self.prefix() + 'x']),
                      float(model_item[self.prefix() + 'y']),
                      float(model_item[self.prefix() + 'width']),
                      float(model_item[self.prefix() + 'height']))

self.prefix() is None.