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

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

     /****************************************************************************
     **
     ** Copyright (C) 2004-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License versions 2.0 or 3.0 as published by the Free Software
     ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
     ** included in the packaging of this file.  Alternatively you may (at
     ** your option) use any later version of the GNU General Public
     ** License if such license has been publicly approved by Trolltech ASA
     ** (or its successors, if any) and the KDE Free Qt Foundation.
     **
     ** Please review the following information to ensure GNU General
     ** Public Licensing requirements will be met:
     ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
     ** you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
     ** or contact the sales department at sales@trolltech.com.
     **
     ** In addition, as a special exception, Trolltech, as the sole
     ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
     ** Integration plug-in the right for the Qt/Eclipse Integration to
     ** link to functionality provided by Qt Designer and its related
     ** libraries.
     **
     ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
     ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
     ** granted herein.
     **
     ** 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;
     }