qt5base-lts/tests/manual/qgraphicsitem/main.cpp

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
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** $QT_END_LICENSE$
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****************************************************************************/
#include <QApplication>
#include <QGraphicsView>
#include <QGraphicsScene>
#include <QGraphicsItem>
#include <QMessageBox>
class MyObject : public QObject
{
public:
MyObject(QGraphicsItem *i, QObject *parent = 0) : QObject(parent), itemToToggle(i)
{
startTimer(500);
}
protected:
void timerEvent(QTimerEvent *)
{
itemToToggle->setVisible(!itemToToggle->isVisible());
}
private:
QGraphicsItem *itemToToggle;
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QGraphicsView gv;
QGraphicsScene *scene = new QGraphicsScene(&gv);
gv.setScene(scene);
QGraphicsItem *rect = scene->addRect(0, 0, 200, 200, QPen(Qt::NoPen), QBrush(Qt::yellow));
rect->setFlag(QGraphicsItem::ItemHasNoContents);
rect->setFlag(QGraphicsItem::ItemClipsChildrenToShape);
QGraphicsItem *childRect = scene->addRect(0, 0, 100, 100, QPen(Qt::NoPen), QBrush(Qt::red));
childRect->setParentItem(rect);
gv.show();
MyObject o(rect);
QMessageBox::information(0, "What you should see",
"The red rectangle should toggle visiblity, so you should see it flash on and off");
return a.exec();
}