|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

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

        /****************************************************************************
        **
        ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
        **
        ** This file is part of the documentation of the Qt Toolkit.
        **
        ** This file may be used under the terms of the GNU General Public
    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
    **
    ** If you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://www.trolltech.com/products/qt/licensing.html or contact the
    ** sales department at sales@trolltech.com.
        **
        ** 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"

        void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                                  const QModelIndex &index) const
        {
            painter->setRenderHint(QPainter::Antialiasing);
            painter->setBrush(QBrush(Qt::white));
            painter->setPen(Qt::NoPen);
            painter->drawRect(option.rect);
            painter->setBrush(QBrush(Qt::black));

            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);

            painter->save();
            painter->translate(option.rect.x() + option.rect.width()/2 - radius,
                               option.rect.y() + option.rect.height()/2 - radius);
            painter->drawEllipse(QRectF(0.0, 0.0, 2*radius, 2*radius));
            painter->restore();
        }

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