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1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the test suite of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:GPL-EXCEPT$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** GNU General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU
19** General Public License version 3 as published by the Free Software
20** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
21** included in the packaging of this file. Please review the following
22** information to ensure the GNU General Public License requirements will
23** be met: https://www.gnu.org/licenses/gpl-3.0.html.
24**
25** $QT_END_LICENSE$
26**
27****************************************************************************/
28#include <QtGui>
29
30#if 0 // Used to be included in Qt4 for Q_WS_WIN
31#define CALLGRIND_START_INSTRUMENTATION {}
32#define CALLGRIND_STOP_INSTRUMENTATION {}
33#else
34#include "valgrind/callgrind.h"
35#endif
36
37#if 0 // Used to be included in Qt4 for Q_WS_X11
38extern void qt_x11_wait_for_window_manager(QWidget *);
39#endif
40
41class View : public QGraphicsView
42{
43 Q_OBJECT
44public:
45 View(QGraphicsScene *scene, QGraphicsItem *item)
46 : QGraphicsView(scene), _item(item)
47 {
48 }
49
50protected:
51 void paintEvent(QPaintEvent *event)
52 {
53 static int n = 0;
54 if (n)
55 CALLGRIND_START_INSTRUMENTATION
56 QGraphicsView::paintEvent(event);
57 _item->moveBy(1, 1);
58 if (n)
59 CALLGRIND_STOP_INSTRUMENTATION
60 if (++n == 200)
61 qApp->quit();
62 }
63
64private:
65 QGraphicsItem *_item;
66};
67
68int main(int argc, char *argv[])
69{
70 QApplication app(argc, argv);
71
72 if (argc < 2) {
73 qDebug("usage: ./%s <numItems>", argv[0]);
74 return 1;
75 }
76
77 QGraphicsScene scene(-150, -150, 300, 300);
78 scene.setItemIndexMethod(QGraphicsScene::NoIndex);
79
80 QGraphicsRectItem *item = scene.addRect(-50, -50, 100, 100, QPen(Qt::NoPen), QBrush(Qt::blue));
81 item->setFlag(QGraphicsItem::ItemIsMovable);
82
83 for (int i = 0; i < atoi(argv[1]); ++i) {
84 QGraphicsRectItem *child = scene.addRect(-5, -5, 10, 10, QPen(Qt::NoPen), QBrush(Qt::blue));
85 child->setPos(-50 + QRandomGenerator::global()->bounded(100), -50 + QRandomGenerator::global()->bounded(100));
86 child->setParentItem(item);
87 }
88
89 View view(&scene, item);
90 view.resize(300, 300);
91 view.show();
92#if 0 // Used to be included in Qt4 for Q_WS_X11
93 qt_x11_wait_for_window_manager(&view);
94#endif
95
96 return app.exec();
97}
98
99#include "main.moc"
100

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