signal_multiplexer.h

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/*
 * Software License Agreement (BSD License)
 *
 * 
 *  Class to multiplex signal and slot connections. Qt 3 code from:
 *  http://doc.trolltech.com/qq/qq08-action-multiplexer.html.
 *  Converted to Qt 4 by a.somers@rathenau.nl.
 *  Modified for use in cloud_composer by jpapon@gmail.com  
 * 
 *  Point Cloud Library (PCL) - www.pointclouds.org
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Willow Garage, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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#ifndef SIGNAL_MULTIPLEXER_H_
#define SIGNAL_MULTIPLEXER_H_

#include <pcl/apps/cloud_composer/qt.h>

namespace pcl
{
  namespace cloud_composer
  {
    class SignalMultiplexer : public QObject
    {
      Q_OBJECT

      public:
        SignalMultiplexer(QObject *parent = 0);

        void 
        connect (QObject *sender, const char *signal, const char *slot);

        bool 
        disconnect (QObject *sender, const char *signal, const char *slot);

        void 
        connect (const char *signal, QObject *receiver, const char *slot);

        bool 
        disconnect (const char *signal, QObject *receiver, const char *slot);

        QObject 
        *currentObject () const { return object; }

      public slots:
        void 
        setCurrentObject (QObject *newObject);

      signals:
        void 
        currentObjectChanged (QObject* newObject);

      private:
        struct Connection
        {
                QPointer<QObject> sender;
                QPointer<QObject> receiver;
                const char *signal;
                const char *slot;
        };

        void 
        connect (const Connection &conn);
        void 
        disconnect (const Connection &conn);

        QPointer<QObject> object;
        QList<Connection> connections;
    };
  }
}

















#endif // SIGNAL_MULTIPLEXER_H_