mirror of https://github.com/CGAL/cgal
79 lines
2.3 KiB
C++
79 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
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#ifndef CGAL_CUSTOM_ZOOM_LAYER_H
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#define CGAL_CUSTOM_ZOOM_LAYER_H
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#include <CGAL/IO/Qt_widget_zoomrect.h>
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class Custom_zoom_layer : public CGAL::Qt_widget_zoomrect{
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public:
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Custom_zoom_layer(QObject* parent = 0, const char* name = 0)
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: Qt_widget_zoomrect(parent, name){}
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protected:
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void keyPressEvent(QKeyEvent *e){
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if ( e->key() == Qt::Key_Plus ){
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widget->zoom(2);
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} else if ( e->key() == Qt::Key_Minus){
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widget->zoom(0.5);
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}
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}
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void mousePressEvent(QMouseEvent *e)
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{
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if(e->button() == Qt::LeftButton
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&& (e->state() & Qt::ControlButton))
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{
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if (!on_first){
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first_x = e->x();
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first_y = e->y();
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on_first = true;
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}
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}
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}
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void mouseReleaseEvent(QMouseEvent *e)
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{
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if(e->button() == Qt::LeftButton
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&& (e->state() & Qt::ControlButton))
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{
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if((e->x() != first_x) && (e->y() != first_y)) {
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double x, y, xfirst2, yfirst2;
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widget->x_real(e->x(), x); widget->y_real(e->y(), y);
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widget->x_real(first_x, xfirst2); widget->y_real(first_y, yfirst2);
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double xmin, xmax, ymin, ymax;
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if(x < xfirst2) {xmin = x; xmax = xfirst2;}
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else {xmin = xfirst2; xmax = x;};
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if(y < yfirst2) {ymin = y; ymax = yfirst2;}
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else {ymin = yfirst2; ymax = y;};
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widget->set_window(xmin, xmax, ymin, ymax);
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on_first = false;
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}
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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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oldcursor = widget->cursor();
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widget->setCursor(crossCursor);
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}
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QCursor oldcursor;
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};
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#endif
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