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** This file is part of the examples of Qt for Python.
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//! [0]
def __init__(self, parent):
    QAbstractItemDelegate.__init__(self, parent)
    self.pixelSize = 12
//! [0]

//! [1]
def paint(self, painter, option, index):
//! [2]
    if option.state and QStyle.State_Selected:
        painter.fillRect(option.rect, option.palette.highlight())
//! [1]

//! [3]
    size = qMin(option.rect.width(), option.rect.height())
//! [3] //! [4]
    brightness = index.model().data(index, Qt.DisplayRole).toInt()
    radius = (size/2.0) - (brightness/255.0 * size/2.0)
    if radius == 0.0:
        return
//! [4]

//! [5]
    painter.save()
//! [5] //! [6]
    painter.setRenderHint(QPainter.Antialiasing, true)
//! [6] //! [7]
    painter.setPen(Qt.NoPen)
//! [7] //! [8]
    if option.state and QStyle.State_Selected:
//! [8] //! [9]
        painter.setBrush(option.palette.highlightedText())
    else
//! [2]
        painter.setBrush(QBrush(Qt.black))
//! [9]

//! [10]
    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()
//! [10]

//! [11]
def sizeHint(self, option, index):
    return QSize(self.pixelSize, self.pixelSize)
//! [11]

//! [12]
def setPixelSize(self, size):
    self.pixelSize = size
//! [12]