| /**************************************************************************** |
| ** |
| ** 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 <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 visibility, so you should see it flash on and off"); |
| return a.exec(); |
| } |