1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/****************************************************************************
**
** Copyright (C) 2012 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
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#ifdef Q_WS_WIN
#define CALLGRIND_START_INSTRUMENTATION {}
#define CALLGRIND_STOP_INSTRUMENTATION {}
#else
#include "valgrind/callgrind.h"
#endif
#ifdef Q_WS_X11
extern void qt_x11_wait_for_window_manager(QWidget *);
#endif
class View : public QGraphicsView
{
Q_OBJECT
public:
View(QGraphicsScene *scene, QGraphicsItem *item)
: QGraphicsView(scene), _item(item)
{
}
protected:
void paintEvent(QPaintEvent *event)
{
static int n = 0;
if (n)
CALLGRIND_START_INSTRUMENTATION
QGraphicsView::paintEvent(event);
_item->moveBy(1, 1);
if (n)
CALLGRIND_STOP_INSTRUMENTATION
if (++n == 200)
qApp->quit();
}
private:
QGraphicsItem *_item;
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
if (argc < 2) {
qDebug("usage: ./%s <numItems>", argv[0]);
return 1;
}
QGraphicsScene scene(-150, -150, 300, 300);
scene.setItemIndexMethod(QGraphicsScene::NoIndex);
QGraphicsRectItem *item = scene.addRect(-50, -50, 100, 100, QPen(Qt::NoPen), QBrush(Qt::blue));
item->setFlag(QGraphicsItem::ItemIsMovable);
for (int i = 0; i < atoi(argv[1]); ++i) {
QGraphicsRectItem *child = scene.addRect(-5, -5, 10, 10, QPen(Qt::NoPen), QBrush(Qt::blue));
child->setPos(-50 + qrand() % 100, -50 + qrand() % 100);
child->setParentItem(item);
}
View view(&scene, item);
view.resize(300, 300);
view.show();
#ifdef Q_WS_X11
qt_x11_wait_for_window_manager(&view);
#endif
return app.exec();
}
#include "main.moc"
|
