|  | Home · All Classes · All Functions · Overviews

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

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial Usage
     ** Licensees holding valid Qt Commercial licenses may use this file in
     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
     **
     ** GNU Lesser General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU Lesser
     ** General Public License version 2.1 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.LGPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU Lesser General Public License version 2.1 requirements
     ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
     **
     ** In addition, as a special exception, Nokia gives you certain additional
     ** rights.  These rights are described in the Nokia Qt LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
     ** met: http://www.gnu.org/copyleft/gpl.html.
     **
     ** If you have questions regarding the use of this file, please contact
     ** Nokia at qt-info@nokia.com.
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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;
     }