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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef FREQUENCYMONITOR_H
#define FREQUENCYMONITOR_H
#include <QObject>
#include <QTimer>
class FrequencyMonitorPrivate;
/**
* Class for measuring frequency of events
*
* Occurrence of the event is notified by the client via the notify() slot.
* On a regular interval, both an instantaneous and a rolling average
* event frequency are calculated.
*/
class FrequencyMonitor : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(FrequencyMonitor)
Q_PROPERTY(QString label READ label WRITE setLabel NOTIFY labelChanged)
Q_PROPERTY(bool active READ active WRITE setActive NOTIFY activeChanged)
Q_PROPERTY(int samplingInterval READ samplingInterval WRITE setSamplingInterval NOTIFY samplingIntervalChanged)
Q_PROPERTY(int traceInterval READ traceInterval WRITE setTraceInterval NOTIFY traceIntervalChanged)
Q_PROPERTY(qreal instantaneousFrequency READ instantaneousFrequency NOTIFY instantaneousFrequencyChanged)
Q_PROPERTY(qreal averageFrequency READ averageFrequency NOTIFY averageFrequencyChanged)
public:
FrequencyMonitor(QObject *parent = 0);
~FrequencyMonitor();
static void qmlRegisterType();
QString label() const;
bool active() const;
int samplingInterval() const;
int traceInterval() const;
qreal instantaneousFrequency() const;
qreal averageFrequency() const;
signals:
void labelChanged(const QString &value);
void activeChanged(bool);
void samplingIntervalChanged(int value);
void traceIntervalChanged(int value);
void frequencyChanged();
void instantaneousFrequencyChanged(qreal value);
void averageFrequencyChanged(qreal value);
public slots:
Q_INVOKABLE void notify();
Q_INVOKABLE void trace();
void setActive(bool value);
void setLabel(const QString &value);
void setSamplingInterval(int value);
void setTraceInterval(int value);
private:
FrequencyMonitorPrivate *d_ptr;
};
#endif // FREQUENCYMONITOR_H
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