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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the E-Bike demo project.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef FPSCOUNTER_H
#define FPSCOUNTER_H
#include <QObject>
#include <QElapsedTimer>
class QQuickWindow;
class FpsCounter : public QObject
{
Q_OBJECT
Q_PROPERTY(qreal fps READ fps NOTIFY fpsChanged)
Q_PROPERTY(bool visible READ visible WRITE setVisible NOTIFY visibleChanged)
public:
explicit FpsCounter(QObject *parent = nullptr);
public:
qreal fps() const { return m_fps; }
bool visible() const { return m_visible; }
void setVisible(bool visible);
void setWindow(QQuickWindow *window);
protected:
void timerEvent(QTimerEvent *);
signals:
void fpsChanged(qreal fps);
void visibleChanged(bool visible);
private slots:
void frameUpdated() { m_frameCounter++; }
private:
QElapsedTimer m_timer;
int m_frameCounter;
qreal m_fps;
bool m_visible;
};
#endif // FPSCOUNTER_H
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