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