mirror of https://github.com/CGAL/cgal
96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
// Copyright (c) 2002-2004 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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//
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//
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// Author(s) : Radu Ursu and Laurent Rineau
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#include <CGAL/basic.h>
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#include <CGAL/IO/Qt_widget_history.h>
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namespace CGAL {
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Qt_widget_history::Qt_widget_history(Qt_widget* parent, const char* name):
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QObject(parent, name), widget(parent)
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{
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it = history_list.begin();
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connect(widget, SIGNAL(rangesChanged()),
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this, SLOT(save()));
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// backward compatibility with CGAL-2.4
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connect(parent, SIGNAL(internal_back()),
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this, SLOT(backward()));
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connect(parent, SIGNAL(internal_forth()),
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this, SLOT(forward()));
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connect(parent, SIGNAL(internal_add_to_history()),
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this, SLOT(save()));
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connect(parent, SIGNAL(internal_clear_history()),
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this, SLOT(clear()));
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}
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void Qt_widget_history::backward()
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{
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if( (! history_list.empty()) && it!=history_list.begin() )
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{
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it--;
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restore();
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}
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emit forwardAvaillable(true);
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if(it == history_list.begin())
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emit backwardAvaillable(false);
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}
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void Qt_widget_history::forward()
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{
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if( it != history_list.end() )
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{
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if( ++it != history_list.end() )
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restore();
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else
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--it;
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}
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emit backwardAvaillable(true);
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if(it == --history_list.end())
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emit forwardAvaillable(false);
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}
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void Qt_widget_history::save()
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{
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if( it != history_list.end() )
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{
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++it;
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history_list.erase(it, history_list.end());
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}
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History_atom* atom = new History_atom();
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atom->save(*widget);
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history_list.push_back(atom);
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it = history_list.end();
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it--;
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if( it != history_list.begin() )
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emit backwardAvaillable(true);
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emit forwardAvaillable(false);
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}
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} // end namespace
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#include "Qt_widget_history.moc"
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