source: branches/4.5.1/examples/itemviews/pixelator/imagemodel.cpp

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#include <QtGui>

#include "imagemodel.h"

//! [0]
ImageModel::ImageModel(QObject *parent)
    : QAbstractTableModel(parent)
{
}
//! [0]

//! [1]
void ImageModel::setImage(const QImage &image)
{
    modelImage = image;
    reset();
}
//! [1]

//! [2]
int ImageModel::rowCount(const QModelIndex & /* parent */) const
{
    return modelImage.height();
}

int ImageModel::columnCount(const QModelIndex & /* parent */) const
//! [2] //! [3]
{
    return modelImage.width();
}
//! [3]

//! [4]
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()));
}
//! [4]

//! [5]
QVariant ImageModel::headerData(int /* section */,
                                Qt::Orientation /* orientation */,
                                int role) const
{
    if (role == Qt::SizeHintRole)
        return QSize(1, 1);
    return QVariant();
}
//! [5]