mirror of https://github.com/CGAL/cgal
58 lines
2.0 KiB
C++
58 lines
2.0 KiB
C++
// Copyright (c) 1997-2000 Utrecht University (The Netherlands),
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// ETH Zurich (Switzerland), Freie Universitaet Berlin (Germany),
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// INRIA Sophia-Antipolis (France), Martin-Luther-University Halle-Wittenberg
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// (Germany), Max-Planck-Institute Saarbruecken (Germany), RISC Linz (Austria),
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// and Tel-Aviv University (Israel). 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; version 2.1 of the License.
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// See the file LICENSE.LGPL distributed with CGAL.
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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
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#ifndef CGAL_NAVIGATION_LAYER_H
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#define CGAL_NAVIGATION_LAYER_H
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#include <CGAL/IO/Qt_widget_layer.h>
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class Navigation_layer : public CGAL::Qt_widget_layer {
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public:
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Navigation_layer(QObject *parent=0, const char* name=0)
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: Qt_widget_layer(parent, name){}
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void draw(){};
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protected:
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void keyPressEvent(QKeyEvent *e){
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const double dx = widget->x_real(10) - widget->x_real(0);
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const double dy = widget->y_real(10) - widget->y_real(0);
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const double ypage = widget->y_max() - widget->y_min();
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if ( e->key() == Qt::Key_Left ){
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widget->move_center(dx, 0);
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} else if ( e->key() == Qt::Key_Right ){
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widget->move_center(-dx, 0);
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} else if ( e->key() == Qt::Key_Down ){
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widget->move_center(0, -dy);
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} else if ( e->key() == Qt::Key_Up ){
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widget->move_center(0, dy);
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} else if ( e->key() == Qt::Key_Prior ){ //PageUp
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widget->move_center(0, -ypage/2);
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} else if ( e->key() == Qt::Key_Next ){ //PageDown
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widget->move_center(0, ypage/2);
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}
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}
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void activating(){
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widget->setFocusPolicy(QWidget::ClickFocus);
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}
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};
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#endif |