messagelistener.h

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/*****************************************************************************
 * Copyright 2015 Haye Hinrichsen, Christoph Wick
 *
 * This file is part of Entropy Piano Tuner.
 *
 * Entropy Piano Tuner is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * Entropy Piano Tuner 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * Entropy Piano Tuner. If not, see http://www.gnu.org/licenses/.
 *****************************************************************************/

//======================================================================
//                         Message listener
//======================================================================

#ifndef MESSAGELISTENER_H
#define MESSAGELISTENER_H

#include "message.h"

class MessageListener
{
public:
    MessageListener(bool defaultActivation = true);
    virtual ~MessageListener();

    virtual void handleMessage(MessagePtr m) = 0;

    bool isMessageListenerActive() const {return mMessageListenerActive;}
    void activateMessageListener() {mMessageListenerActive = true;}
    void deactivateMessageListener() {mMessageListenerActive = false;}

private:
    bool mMessageListenerActive;
};

#endif // MESSAGELISTENER_H