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/*****************************************************************************
* $CAMITK_LICENCE_BEGIN$
*
* CamiTK - Computer Assisted Medical Intervention ToolKit
* (c) 2001-2018 Univ. Grenoble Alpes, CNRS, TIMC-IMAG UMR 5525 (GMCAO)
*
* Visit http://camitk.imag.fr for more information
*
* This file is part of CamiTK.
*
* CamiTK is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* CamiTK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with CamiTK. If not, see <http://www.gnu.org/licenses/>.
*
* $CAMITK_LICENCE_END$
****************************************************************************/
#ifndef TOOLS_CHRONO_H
#define TOOLS_CHRONO_H
#include <iostream>
/**
*
* @ingroup group_cepmodeling_libraries_mml
*
* @brief
* Elapsed real-time timer.
* Allows one to measure elapsed real time. You can start, stop, reset
* and of course get and print the current values of this chronometer.
*/
class Chrono {
public:
/// default constructor
Chrono();
/// new chrono that starts directly at the given time
Chrono(double);
~Chrono() = default;
/// start at zero
void start();
/// start at a given value
void start(double);
/// stop chrono
double stop();
/// pause the chrono if the parameter is true
void hold(bool);
/// reset to zero
void reset();
/** if running, get the value (start time - now) without stopping the chrono,
* else get (start time - stop time) value
* this method is declared to be const, because we need to call it in <<
* (and of course, no data member is modified
*/
double get() const;
/// print the value of the chrono on the stream
friend std::ostream& operator << (std::ostream&, const Chrono);
private:
double startValue;
double stopValue;
bool running;
double accumulatedTime;
/// in milliseconds
double getTimeInMilliseconds() const;
};
#endif // TOOLS_CHRONO_H
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