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# pixeldelegate.cpp Example File
itemviews/pixelator/pixeldelegate.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2004-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtGui>

    #include "pixeldelegate.h"

    PixelDelegate::PixelDelegate(QObject *parent)
        : QAbstractItemDelegate(parent)
    {
        pixelSize = 12;
    }

    void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                              const QModelIndex &index) const
    {
        if (option.state & QStyle::State_Selected)
            painter->fillRect(option.rect, option.palette.highlight());

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

        painter->save();
        painter->setRenderHint(QPainter::Antialiasing, true);
        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();
    }

    QSize PixelDelegate::sizeHint(const QStyleOptionViewItem & /* option */,
                                  const QModelIndex & /* index */) const
    {
        return QSize(pixelSize, pixelSize);
    }

    void PixelDelegate::setPixelSize(int size)
    {
        pixelSize = size;
    }