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50#ifndef HAPPYBIRTHDAYSONG_H
51#define HAPPYBIRTHDAYSONG_H
52
53#include <QQmlPropertyValueSource>
54#include <QQmlProperty>
55#include <qqml.h>
56
57#include <QStringList>
58#include <qqml.h>
59
60class HappyBirthdaySong : public QObject, public QQmlPropertyValueSource
61{
62 Q_OBJECT
63 Q_PROPERTY(QString name READ name WRITE setName NOTIFY nameChanged)
64 Q_INTERFACES(QQmlPropertyValueSource)
65 QML_ELEMENT
66public:
67 HappyBirthdaySong(QObject *parent = nullptr);
68
69 void setTarget(const QQmlProperty &) override;
70
71 QString name() const;
72 void setName(const QString &);
73
74private slots:
75 void advance();
76
77signals:
78 void nameChanged();
79private:
80 int m_line;
81 QStringList m_lyrics;
82 QQmlProperty m_target;
83 QString m_name;
84};
85
86#endif // HAPPYBIRTHDAYSONG_H
87
88

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