103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef FREQUENCYMONITOR_H
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#define FREQUENCYMONITOR_H
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#include <QObject>
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#include <QTimer>
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class FrequencyMonitorPrivate;
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/**
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* Class for measuring frequency of events
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*
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* Occurrence of the event is notified by the client via the notify() slot.
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* On a regular interval, both an instantaneous and a rolling average
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* event frequency are calculated.
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*/
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class FrequencyMonitor : public QObject
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{
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Q_OBJECT
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Q_DECLARE_PRIVATE(FrequencyMonitor)
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Q_PROPERTY(QString label READ label WRITE setLabel NOTIFY labelChanged)
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Q_PROPERTY(bool active READ active WRITE setActive NOTIFY activeChanged)
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Q_PROPERTY(int samplingInterval READ samplingInterval WRITE setSamplingInterval NOTIFY samplingIntervalChanged)
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Q_PROPERTY(int traceInterval READ traceInterval WRITE setTraceInterval NOTIFY traceIntervalChanged)
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Q_PROPERTY(qreal instantaneousFrequency READ instantaneousFrequency NOTIFY instantaneousFrequencyChanged)
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Q_PROPERTY(qreal averageFrequency READ averageFrequency NOTIFY averageFrequencyChanged)
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public:
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FrequencyMonitor(QObject *parent = 0);
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~FrequencyMonitor();
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static void qmlRegisterType();
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QString label() const;
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bool active() const;
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int samplingInterval() const;
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int traceInterval() const;
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qreal instantaneousFrequency() const;
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qreal averageFrequency() const;
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signals:
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void labelChanged(const QString &value);
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void activeChanged(bool);
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void samplingIntervalChanged(int value);
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void traceIntervalChanged(int value);
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void frequencyChanged();
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void instantaneousFrequencyChanged(qreal value);
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void averageFrequencyChanged(qreal value);
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public slots:
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Q_INVOKABLE void notify();
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Q_INVOKABLE void trace();
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void setActive(bool value);
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void setLabel(const QString &value);
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void setSamplingInterval(int value);
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void setTraceInterval(int value);
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private:
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FrequencyMonitorPrivate *d_ptr;
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};
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#endif // FREQUENCYMONITOR_H
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