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#include <QtGui>

#include "pixeldelegate.h"

//! [0]

PixelDelegate::PixelDelegate(QObject *parent)

    : QAbstractItemDelegate(parent)

{

    pixelSize = 12;

}

//! [0]

//! [1]

void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,

                          const QModelIndex &index) const

{

//! [2]

    if (option.state & QStyle::State_Selected)

        painter->fillRect(option.rect, option.palette.highlight());

//! [1]

//! [3]

    int size = qMin(option.rect.width(), option.rect.height());

//! [3] //! [4]

    int brightness = index.model()->data(index, Qt::DisplayRole).toInt();

    double 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 & 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]

QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & /* option */,

                              const QModelIndex & /* index */) const

{

    return QSize(pixelSize, pixelSize);

}

//! [11]

//! [12]

void PixelDelegate::setPixelSize(int size)

{

    pixelSize = size;

}

//! [12]