ParticipantLegendListModel.py 文件源码

def data(self, index: QModelIndex, role=None):
        row = index.row()
        if role == Qt.DisplayRole:
            if row == 0:
                return "not assigned"
            else:
                try:
                    return self.participants[row-1].name + " ("+ self.participants[row-1].shortname + ")"
                except IndexError:
                    return None
        elif role == Qt.BackgroundColorRole:
            if row > 0:
                try:
                    return constants.PARTICIPANT_COLORS[self.participants[row-1].color_index]
                except IndexError:
                    return None
        elif role == Qt.TextColorRole:
            if row > 0:
                try:
                    bgcolor = constants.PARTICIPANT_COLORS[self.participants[row-1].color_index]
                    red, green, blue = bgcolor.red(), bgcolor.green(), bgcolor.blue()
                    return QColor("black") if (red * 0.299 + green * 0.587 + blue * 0.114) > 186 else  QColor("white")
                except IndexError:
                    return None