1/****************************************************************************
2**
3** Copyright (C) 2017 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
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** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50#include "happybirthdaysong.h"
51#include <QTimer>
52
53HappyBirthdaySong::HappyBirthdaySong(QObject *parent)
54: QObject(parent), m_line(-1)
55{
56 setName(QString());
57 auto *timer = new QTimer(this);
58 QObject::connect(sender: timer, signal: &QTimer::timeout, receiver: this, slot: &HappyBirthdaySong::advance);
59 timer->start(msec: 1000);
60}
61
62void HappyBirthdaySong::setTarget(const QQmlProperty &p)
63{
64 m_target = p;
65}
66
67QString HappyBirthdaySong::name() const
68{
69 return m_name;
70}
71
72void HappyBirthdaySong::setName(const QString &name)
73{
74 if (m_name == name)
75 return;
76
77 m_name = name;
78
79 m_lyrics.clear();
80 m_lyrics << "Happy birthday to you,";
81 m_lyrics << "Happy birthday to you,";
82 m_lyrics << "Happy birthday dear " + m_name + ",";
83 m_lyrics << "Happy birthday to you!";
84 m_lyrics << "";
85
86 emit nameChanged();
87}
88
89void HappyBirthdaySong::advance()
90{
91 m_line = (m_line + 1) % m_lyrics.count();
92
93 m_target.write(m_lyrics.at(i: m_line));
94}
95
96

source code of qtdeclarative/examples/qml/referenceexamples/binding/happybirthdaysong.cpp