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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qwindow.h>
#include <qbackingstore.h>
#include <qpainter.h>
#include <QtTest/QtTest>
#include <QEvent>
// For QSignalSpy slot connections.
Q_DECLARE_METATYPE(Qt::ScreenOrientation)
class tst_QBackingStore : public QObject
{
Q_OBJECT
private slots:
void flush();
};
class Window : public QWindow
{
public:
Window()
: backingStore(this)
{
}
void resizeEvent(QResizeEvent *)
{
backingStore.resize(size());
}
void exposeEvent(QExposeEvent *event)
{
QRect rect(QPoint(), size());
backingStore.beginPaint(rect);
QPainter p(backingStore.paintDevice());
p.fillRect(rect, Qt::white);
p.end();
backingStore.endPaint();
backingStore.flush(event->region().boundingRect());
}
private:
QBackingStore backingStore;
};
void tst_QBackingStore::flush()
{
Window window;
window.setGeometry(20, 20, 200, 200);
window.showMaximized();
QTRY_VERIFY(window.isExposed());
}
#include <tst_qbackingstore.moc>
QTEST_MAIN(tst_QBackingStore);
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