Home · 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 documentation 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. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** 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;
 }


Copyright © 2008 Trolltech Trademarks
Qt 4.3.5