update copyright notices in libgui directory * documentation-dockwidget.cc, documentation-dockwidget.h, files-dockwidget.cc, files-dockwidget.h, history-dockwidget.cc, history-dockwidget.h, m-editor/file-editor-interface.h, m-editor/file-editor-tab.cc, m-editor/file-editor-tab.h, m-editor/file-editor.cc, m-editor/file-editor.h, m-editor/lexer-octave-gui.cc, m-editor/lexer-octave-gui.h, main-window.cc, main-window.h, octave-adapter/octave-event-listener.h, octave-adapter/octave-event-observer.h, octave-adapter/octave-event.cc, octave-adapter/octave-event.h, octave-adapter/octave-link.cc, octave-adapter/octave-link.h, octave-adapter/octave-main-thread.cc, octave-adapter/octave-main-thread.h, octave-gui.cc, octave-qt-event-listener.cc, octave-qt-event-listener.h, resource-manager.cc, resource-manager.h, settings-dialog.cc, settings-dialog.h, symbol-information.cc, symbol-information.h, terminal-dockwidget.cc, terminal-dockwidget.h, welcome-wizard.cc, welcome-wizard.h, workspace-model.cc, workspace-model.h, workspace-view.cc, workspace-view.h: Use copyright notice format that is consistent with other files in Octave.

/*

Copyright (C) 2011-2012 Jacob Dawid

This file is part of Octave.

Octave 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.

Octave 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 Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#ifndef OCTAVEEVENTLISTENER_H
#define OCTAVEEVENTLISTENER_H

#include <string>

class octave_event_listener
{
  public:
    octave_event_listener () { }
    virtual ~octave_event_listener () { }

    virtual void current_directory_has_changed (std::string directory) = 0;
    virtual void about_to_exit () = 0;

    virtual void entered_debug_mode () = 0;
    virtual void quit_debug_mode () = 0;
};

#endif // OCTAVEEVENTLISTENER_H