EventHandler.h

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#ifndef SimTK_SimTKCOMMON_EVENT_HANDLER_H_
#define SimTK_SimTKCOMMON_EVENT_HANDLER_H_

/* -------------------------------------------------------------------------- *
 *                      SimTK Core: SimTKcommon                               *
 * -------------------------------------------------------------------------- *
 * This is part of the SimTK Core biosimulation toolkit originating from      *
 * Simbios, the NIH National Center for Physics-Based Simulation of           *
 * Biological Structures at Stanford, funded under the NIH Roadmap for        *
 * Medical Research, grant U54 GM072970. See https://simtk.org.               *
 *                                                                            *
 * Portions copyright (c) 2007 Stanford University and the Authors.           *
 * Authors: Peter Eastman                                                     *
 * Contributors:                                                              *
 *                                                                            *
 * Permission is hereby granted, free of charge, to any person obtaining a    *
 * copy of this software and associated documentation files (the "Software"), *
 * to deal in the Software without restriction, including without limitation  *
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,   *
 * and/or sell copies of the Software, and to permit persons to whom the      *
 * Software is furnished to do so, subject to the following conditions:       *
 *                                                                            *
 * The above copyright notice and this permission notice shall be included in *
 * all copies or substantial portions of the Software.                        *
 *                                                                            *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,   *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL    *
 * THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,    *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR      *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE  *
 * USE OR OTHER DEALINGS IN THE SOFTWARE.                                     *
 * -------------------------------------------------------------------------- */

#include "SimTKcommon/basics.h"
#include "SimTKcommon/Simmatrix.h"
#include "SimTKcommon/internal/State.h"
#include "SimTKcommon/internal/System.h"

namespace SimTK {

class SimTK_SimTKCOMMON_EXPORT EventHandler {
public:
    virtual ~EventHandler();
    
    virtual void handleEvent(State& state, Real accuracy, const Vector& yWeights, const Vector& ooConstraintTols, Stage& lowestModified, bool& shouldTerminate) const = 0;
};

class SimTK_SimTKCOMMON_EXPORT ScheduledEventHandler : public EventHandler {
public:
    virtual ~ScheduledEventHandler();
    
    virtual Real getNextEventTime(const State& state, bool includeCurrentTime) const = 0;
};

class SimTK_SimTKCOMMON_EXPORT TriggeredEventHandler : public EventHandler {
public:
    class TriggeredEventHandlerImpl;
    TriggeredEventHandler(const TriggeredEventHandler& clone);
    TriggeredEventHandler& operator=(const TriggeredEventHandler& clone);
    virtual ~TriggeredEventHandler();
    
    TriggeredEventHandler(Stage requiredStage);
    
    virtual Real getValue(const State&) const = 0;
    
    EventTriggerInfo& getTriggerInfo();
    
    Stage getRequiredStage() const;
private:
    TriggeredEventHandlerImpl* impl;
};

class SimTK_SimTKCOMMON_EXPORT PeriodicEventHandler : public ScheduledEventHandler {
public:
    class PeriodicEventHandlerImpl;
    ~PeriodicEventHandler();
    Real getNextEventTime(const State& state, bool includeCurrentTime) const;
    
    PeriodicEventHandler(Real eventInterval);
    
    Real getEventInterval() const;
    
    void setEventInterval(Real eventInterval);
private:
    PeriodicEventHandlerImpl* impl;
};

} // namespace SimTK

#endif // SimTK_SimTKCOMMON_EVENT_HANDLER_H_