EventDispatcher.h

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/*
 * Copyright (C) 2007-2010 RobotCub Consortium, European Commission FP6 Project IST-004370
 * author:  Arjan Gijsberts
 * email:   arjan.gijsberts@iit.it
 * website: www.robotcub.org
 * Permission is granted to copy, distribute, and/or modify this program
 * under the terms of the GNU General Public License, version 2 or any
 * later version published by the Free Software Foundation.
 *
 * A copy of the license can be found at
 * http://www.robotcub.org/icub/license/gpl.txt
 *
 * This program 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 General
 * Public License for more details
 */
 
#ifndef LM_EVENTDISPATCHER__
#define LM_EVENTDISPATCHER__
 
#include <list>
 
#include "iCub/learningMachine/IEventListener.h"
 
namespace iCub {
namespace learningmachine {
 
 
class EventDispatcher {
private:
    std::list<IEventListener*> listeners;
 
    EventDispatcher() { }
 
    EventDispatcher(const EventDispatcher& other);
 
    virtual ~EventDispatcher();
 
    EventDispatcher& operator=(const EventDispatcher& other);
 
public:
    static EventDispatcher& instance() {
        static EventDispatcher instance;
        return instance;
    }
 
    virtual void addListener(IEventListener* listener) {
        this->listeners.push_back(listener);
    }
 
    virtual void removeListener(int idx);
 
    virtual void removeListener(IEventListener* listener);
 
    virtual IEventListener& getAt(int idx);
 
    virtual IEventListener& getAt(int idx) const;
 
    virtual void clear();
 
    virtual void raise(IEvent& event);
 
    virtual int countListeners() const {
        return this->listeners.size();
    }
 
    virtual bool hasListeners() {
        return (!this->listeners.empty());
    }
 
};
 
} // learningmachine
} // iCub
 
#endif