mirror of https://github.com/CGAL/cgal
99 lines
2.4 KiB
C++
99 lines
2.4 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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#ifndef CGAL_QT_WIDGET_HISTORY_H
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#define CGAL_QT_WIDGET_HISTORY_H
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#include <list>
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#include <algorithm>
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#include <CGAL/IO/Qt_widget.h>
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namespace CGAL {
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class History_atom {
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public:
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History_atom() {};
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virtual ~History_atom() {};
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void save(const Qt_widget& widget){
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xmin = widget.x_min();
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ymin = widget.y_min();
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xmax = widget.x_max();
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ymax = widget.y_max();
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}
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void restore(Qt_widget& widget) const {
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widget.set_window(xmin, xmax, ymin, ymax);
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}
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private:
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double xmin, xmax, ymin, ymax;
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};
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class Qt_widget_history : public QObject {
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Q_OBJECT
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public:
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Qt_widget_history(Qt_widget* parent, const char* name = 0 );
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signals:
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void backwardAvaillable(bool);
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void forwardAvaillable(bool);
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public slots:
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void backward();
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void forward();
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private:
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struct Free {
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void operator()(History_atom* atom) const
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{
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delete atom;
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}
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};
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public slots:
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void save();
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void clear() {
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std::for_each(history_list.begin(), history_list.end(), Free());
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history_list.clear();
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it = history_list.begin();
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emit backwardAvaillable(false);
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emit forwardAvaillable(false);
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}
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private:
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void restore(){
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disconnect( widget, SIGNAL(rangesChanged()),
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this, SLOT(save()));
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(*it)->restore(*widget);
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connect(widget, SIGNAL(rangesChanged()),
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this, SLOT(save()));
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widget->redraw();
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}
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private:
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std::list<History_atom*> history_list;
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std::list<History_atom*>::iterator it;
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Qt_widget* widget;
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};
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} // namespace CGAL end
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#endif // CGAL_QT_WIDGET_HISTORY_H
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