|  | Home · All Classes · Main Classes · Annotated · Grouped Classes · 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 distributed under the terms of the Q Public License
    ** as defined by Trolltech AS of Norway and appearing in the file
    ** LICENSE.QPL included in the packaging of this file.
    **
    ** This file may be distributed and/or modified under the terms of the
    ** GNU General Public License version 2 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    **   information about Qt Commercial License Agreements.
    ** See http://www.trolltech.com/qpl/ for QPL licensing information.
    ** See http://www.trolltech.com/gpl/ for GPL licensing information.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
        **
        ** 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);
        }