qt5base-lts/examples/itemviews/pixelator/imagemodel.cpp

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/
#include <QtWidgets>
#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]