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

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

        /****************************************************************************
        **
        ** Copyright (C) 2004-2006 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"

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

        void PixelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                                  const QModelIndex &index) const
        {
            painter->setRenderHint(QPainter::Antialiasing);
            painter->setPen(Qt::NoPen);

            if (option.state & QStyle::State_Selected)
                painter->setBrush(option.palette.highlight());
            else
                painter->setBrush(QBrush(Qt::white));

            painter->drawRect(option.rect);

            if (option.state & QStyle::State_Selected)
                painter->setBrush(option.palette.highlightedText());
            else
                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->drawEllipse(QRectF(option.rect.x() + option.rect.width()/2 - radius,
                                        option.rect.y() + option.rect.height()/2 - radius,
                                        2*radius, 2*radius));
        }

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

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