mirror of https://github.com/qt/qtbase.git
82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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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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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this
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** file. Please review the following information to ensure the GNU Lesser
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** General Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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 General
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** Public License version 3.0 as published by the Free Software Foundation
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** and appearing in the file LICENSE.GPL included in the packaging of this
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** file. Please review the following information to ensure the GNU General
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** Public License version 3.0 requirements will be met:
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** Other Usage
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** Alternatively, this file may be used in accordance with the terms and
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** conditions contained in a signed written agreement between you and Nokia.
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets/QApplication>
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#include <QtWidgets/QGraphicsView>
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#include <QtWidgets/QGraphicsScene>
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#include <QtWidgets/QGraphicsItem>
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#include <QtWidgets/QMessageBox>
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class MyObject : public QObject
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{
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public:
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MyObject(QGraphicsItem *i, QObject *parent = 0) : QObject(parent), itemToToggle(i)
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{
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startTimer(500);
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}
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protected:
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void timerEvent(QTimerEvent *)
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{
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itemToToggle->setVisible(!itemToToggle->isVisible());
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}
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private:
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QGraphicsItem *itemToToggle;
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};
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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QGraphicsView gv;
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QGraphicsScene *scene = new QGraphicsScene(&gv);
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gv.setScene(scene);
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QGraphicsItem *rect = scene->addRect(0, 0, 200, 200, QPen(Qt::NoPen), QBrush(Qt::yellow));
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rect->setFlag(QGraphicsItem::ItemHasNoContents);
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rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
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QGraphicsItem *childRect = scene->addRect(0, 0, 100, 100, QPen(Qt::NoPen), QBrush(Qt::red));
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childRect->setParentItem(rect);
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gv.show();
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MyObject o(rect);
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QMessageBox::information(0, "What you should see",
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"The red rectangle should toggle visiblity, so you should see it flash on and off");
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return a.exec();
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}
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