#ifndef _GLIBMM_SIGNALPROXY_CONNECTIONNODE_H
#define _GLIBMM_SIGNALPROXY_CONNECTIONNODE_H

/* signalproxy_connectionnode.h
 *
 * Copyright (C) 2002 The gtkmm Development Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <glibmmconfig.h>

#include <sigc++/sigc++.h>
#include <glib.h>

#ifndef DOXYGEN_SHOULD_SKIP_THIS
using GObject = struct _GObject;
using GClosure = struct _GClosure;
#endif // DOXYGEN_SHOULD_SKIP_THIS

namespace Glib
{

#ifndef DOXYGEN_SHOULD_SKIP_THIS

/** SignalProxyConnectionNode is a connection node for use with SignalProxy.
  * It lives between the layer of Gtk+ and libsigc++.
  * It is very much an internal class.
  */
class GLIBMM_API SignalProxyConnectionNode : public sigc::notifiable
{
public:
  /** @param slot The signal handler for the glib signal.
   *  @param gobject The GObject that might emit this glib signal
   */
  SignalProxyConnectionNode(const sigc::slot_base& slot, GObject* gobject);

  /** @param slot The signal handler for the glib signal.
   *  @param gobject The GObject that might emit this glib signal
   *
   * @newin{2,48}
   */
  SignalProxyConnectionNode(sigc::slot_base&& slot, GObject* gobject);

  /** Callback that is executed when the slot becomes invalid.
   * This callback is registered in the slot.
   * @param data The SignalProxyConnectionNode object (@p this).
   */
  static void notify(sigc::notifiable* data);

  /** Callback that is executed when the glib closure is destroyed.
   * @param data The SignalProxyConnectionNode object (@p this).
   * @param closure The glib closure object.
   */
  static void destroy_notify_handler(gpointer data, GClosure* closure);

  gulong connection_id_;
  sigc::slot_base slot_;

protected:
  GObject* object_;
};

#endif // DOXYGEN_SHOULD_SKIP_THIS

} /* namespace Glib */

#endif /* _GLIBMM_SIGNALPROXY_CONNECTIONNODE_H */
