examples/declarative/cppextensions/referenceexamples/binding/happybirthdaysong.cpp
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     1 /****************************************************************************
       
     2 **
       
     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
       
     4 ** All rights reserved.
       
     5 ** Contact: Nokia Corporation (qt-info@nokia.com)
       
     6 **
       
     7 ** This file is part of the examples of the Qt Toolkit.
       
     8 **
       
     9 ** $QT_BEGIN_LICENSE:BSD$
       
    10 ** You may use this file under the terms of the BSD license as follows:
       
    11 **
       
    12 ** "Redistribution and use in source and binary forms, with or without
       
    13 ** modification, are permitted provided that the following conditions are
       
    14 ** met:
       
    15 **   * Redistributions of source code must retain the above copyright
       
    16 **     notice, this list of conditions and the following disclaimer.
       
    17 **   * Redistributions in binary form must reproduce the above copyright
       
    18 **     notice, this list of conditions and the following disclaimer in
       
    19 **     the documentation and/or other materials provided with the
       
    20 **     distribution.
       
    21 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
       
    22 **     the names of its contributors may be used to endorse or promote
       
    23 **     products derived from this software without specific prior written
       
    24 **     permission.
       
    25 **
       
    26 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
       
    27 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
       
    28 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
       
    29 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
       
    30 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
       
    31 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
       
    32 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
       
    33 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
       
    34 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
       
    35 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
       
    36 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
       
    37 ** $QT_END_LICENSE$
       
    38 **
       
    39 ****************************************************************************/
       
    40 #include "happybirthdaysong.h"
       
    41 #include <QTimer>
       
    42 
       
    43 HappyBirthdaySong::HappyBirthdaySong(QObject *parent)
       
    44 : QObject(parent), m_line(-1)
       
    45 {
       
    46     setName(QString());
       
    47     QTimer *timer = new QTimer(this);
       
    48     QObject::connect(timer, SIGNAL(timeout()), this, SLOT(advance()));
       
    49     timer->start(1000);
       
    50 }
       
    51 
       
    52 void HappyBirthdaySong::setTarget(const QDeclarativeProperty &p)
       
    53 {
       
    54     m_target = p;
       
    55 }
       
    56 
       
    57 QString HappyBirthdaySong::name() const
       
    58 {
       
    59     return m_name;
       
    60 }
       
    61 
       
    62 void HappyBirthdaySong::setName(const QString &name)
       
    63 {
       
    64     if (m_name == name)
       
    65         return;
       
    66 
       
    67     m_name = name;
       
    68 
       
    69     m_lyrics.clear();
       
    70     m_lyrics << "Happy birthday to you,";
       
    71     m_lyrics << "Happy birthday to you,";
       
    72     m_lyrics << "Happy birthday dear " + m_name + ",";
       
    73     m_lyrics << "Happy birthday to you!";
       
    74     m_lyrics << "";
       
    75     
       
    76     emit nameChanged();
       
    77 }
       
    78     
       
    79 void HappyBirthdaySong::advance()
       
    80 {
       
    81     m_line = (m_line + 1) % m_lyrics.count();
       
    82 
       
    83     m_target.write(m_lyrics.at(m_line));
       
    84 }
       
    85