UpdateTimer.h

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//  ************************************************************************************************
//
//  BornAgain: simulate and fit reflection and scattering
//
//! @file      GUI/View/Tool/UpdateTimer.h
//! @brief     Defines class UpdateTimer
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
//  ************************************************************************************************
 
#ifndef BORNAGAIN_GUI_VIEW_TOOL_UPDATETIMER_H
#define BORNAGAIN_GUI_VIEW_TOOL_UPDATETIMER_H
 
#include <QObject>
 
class QTimer;
 
//! The UpdateTimer class accumulates update requests during certain period of time, and at
//! the end of this period emits special signal.
 
//! Used in ColorMap plot to avoid often replot of CustomPlot.
 
class UpdateTimer : public QObject {
    Q_OBJECT
public:
    explicit UpdateTimer(int timerInterval, QObject* parent = nullptr);
 
    void reset();
 
    void setWallclockTimer(int timerInterval);
 
signals:
    void timeToUpdate();
 
public slots:
    void scheduleUpdate();
 
private slots:
    void onTimerTimeout();
 
private:
    qint64 m_update_request_count; //!< Number of requests accumulated so far.
    int m_timer_interval;          //!< Timer in msec.
    bool m_is_busy;
    QTimer* m_timer;
};
 
#endif // BORNAGAIN_GUI_VIEW_TOOL_UPDATETIMER_H