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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef SINGLETON_H
#define SINGLETON_H
#include <QtQml/qobject.h>
#include <QtQml/qqml.h>
#include <QtQml/qqmlengine.h>
//![0]
// Singleton.h
class Singleton : public QObject
{
Q_OBJECT
Q_PROPERTY(int thing READ thing WRITE setThing NOTIFY thingChanged FINAL)
QML_ELEMENT
QML_SINGLETON
public:
Singleton(QObject *parent = nullptr) : QObject(parent) {}
int thing() const { return m_value; }
void setThing(int v)
{
if (v != m_value) {
m_value = v;
emit thingChanged();
}
}
signals:
void thingChanged();
private:
int m_value = 12;
};
//![0]
inline void setTheThing(QQmlEngine *engine)
{
//![1]
Singleton *singleton
= engine->singletonInstance<Singleton *>("MyModule", "Singleton");
singleton->setThing(77);
//![1]
}
#endif
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