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// Copyright (c) 2002-2004 INRIA Sophia-Antipolis (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org); 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; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.5-branch/Qt_widget/include/CGAL/IO/Navigation_layer.h $
// $Id: Navigation_layer.h 32795 2006-07-30 16:38:54Z spion $
//
//
// Author(s) : Radu Ursu
#ifndef CGAL_NAVIGATION_LAYER_H
#define CGAL_NAVIGATION_LAYER_H
#include <CGAL/IO/Qt_widget_layer.h>
class Navigation_layer : public CGAL::Qt_widget_layer {
public:
Navigation_layer(QObject *parent=0, const char* name=0)
: Qt_widget_layer(parent, name){}
void draw(){};
protected:
void keyPressEvent(QKeyEvent *e){
const double dx = widget->x_real(10) - widget->x_real(0);
const double dy = widget->y_real(10) - widget->y_real(0);
const double ypage = widget->y_max() - widget->y_min();
if ( e->key() == Qt::Key_Left ){
widget->move_center(dx, 0);
} else if ( e->key() == Qt::Key_Right ){
widget->move_center(-dx, 0);
} else if ( e->key() == Qt::Key_Down ){
widget->move_center(0, -dy);
} else if ( e->key() == Qt::Key_Up ){
widget->move_center(0, dy);
} else if ( e->key() == Qt::Key_Prior ){ //PageUp
widget->move_center(0, -ypage/2);
} else if ( e->key() == Qt::Key_Next ){ //PageDown
widget->move_center(0, ypage/2);
}
}
void activating(){
widget->setFocusPolicy(QWidget::ClickFocus);
}
};
#endif
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