- Qt 5.3
- Qt QML
- Extending QML - Property Value Source Example
- happybirthdaysong.h Example File
- Qt 5.3.2 Reference Documentation

# happybirthdaysong.h Example File

referenceexamples/valuesource/happybirthdaysong.h

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the examples of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** You may use this file under the terms of the BSD license as follows:
    **
    ** "Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions are
    ** met:
    **   * Redistributions of source code must retain the above copyright
    **     notice, this list of conditions and the following disclaimer.
    **   * Redistributions in binary form must reproduce the above copyright
    **     notice, this list of conditions and the following disclaimer in
    **     the documentation and/or other materials provided with the
    **     distribution.
    **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
    **     of its contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
    **
    **
    ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/
    #ifndef HAPPYBIRTHDAYSONG_H
    #define HAPPYBIRTHDAYSONG_H

    #include <QQmlPropertyValueSource>
    #include <QQmlProperty>
    #include <qqml.h>

    #include <QStringList>

    // ![0]
    class HappyBirthdaySong : public QObject, public QQmlPropertyValueSource
    {
        Q_OBJECT
        Q_INTERFACES(QQmlPropertyValueSource)
    // ![0]
        Q_PROPERTY(QString name READ name WRITE setName)
    // ![1]
    public:
        HappyBirthdaySong(QObject *parent = 0);

        virtual void setTarget(const QQmlProperty &);
    // ![1]

        QString name() const;
        void setName(const QString &);

    private slots:
        void advance();

    private:
        int m_line;
        QStringList m_lyrics;
        QQmlProperty m_target;
        QString m_name;
    // ![2]
    };
    // ![2]

    #endif // HAPPYBIRTHDAYSONG_H