pixelator.py 文件源码

def paint(self, painter, option, index):
        if option.state & QStyle.State_Selected:
            painter.fillRect(option.rect, option.palette.highlight())

        size = min(option.rect.width(), option.rect.height())
        brightness = index.model().data(index, Qt.DisplayRole)
        radius = (size/2.0) - (brightness/255.0 * size/2.0)
        if radius == 0.0:
            return

        painter.save()
        painter.setRenderHint(QPainter.Antialiasing)
        painter.setPen(Qt.NoPen)

        if option.state & QStyle.State_Selected:
            painter.setBrush(option.palette.highlightedText())
        else:
            painter.setBrush(QBrush(Qt.black))

        painter.drawEllipse(QRectF(
                            option.rect.x() + option.rect.width()/2 - radius,
                            option.rect.y() + option.rect.height()/2 - radius,
                            2*radius, 2*radius))

        painter.restore()