Qt 4.2: imagemodel.cpp Example File (itemviews/pixelator/imagemodel.cpp)

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

     /****************************************************************************
     **
     ** Copyright (C) 2004-2006 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 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:
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     ** review the following information:
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     #include <QtGui>

     #include "imagemodel.h"

     ImageModel::ImageModel(QObject *parent)
         : QAbstractTableModel(parent)
     {
     }

     void ImageModel::setImage(const QImage &image)
     {
         modelImage = image;
         reset();
     }

     int ImageModel::rowCount(const QModelIndex & /* parent */) const
     {
         return modelImage.height();
     }

     int ImageModel::columnCount(const QModelIndex & /* parent */) const
     {
         return modelImage.width();
     }

     QVariant ImageModel::data(const QModelIndex &index, int role) const
     {
         if (!index.isValid() || role != Qt::DisplayRole)
             return QVariant();
         return qGray(modelImage.pixel(index.column(), index.row()));
     }

     QVariant ImageModel::headerData(int /* section */,
                                     Qt::Orientation /* orientation */,
                                     int role) const
     {
         if (role == Qt::SizeHintRole)
             return QSize(1, 1);
         return QVariant();
     }