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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; either version 3 of the License,
// or (at your option) any later version.
//
// 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/next/Qt_widget/include/CGAL/IO/Custom_zoom_layer.h $
// $Id: Custom_zoom_layer.h 67093 2012-01-13 11:22:39Z lrineau $
//
//
// Author(s) : Radu Ursu
#ifndef CGAL_CUSTOM_ZOOM_LAYER_H
#define CGAL_CUSTOM_ZOOM_LAYER_H
#include <CGAL/IO/Qt_widget_zoomrect.h>
class Custom_zoom_layer : public CGAL::Qt_widget_zoomrect{
public:
Custom_zoom_layer(QObject* parent = 0, const char* name = 0)
: Qt_widget_zoomrect(parent, name){}
protected:
void keyPressEvent(QKeyEvent *e){
if ( e->key() == Qt::Key_Plus ){
widget->zoom(2);
} else if ( e->key() == Qt::Key_Minus){
widget->zoom(0.5);
}
}
void mousePressEvent(QMouseEvent *e)
{
if(e->button() == Qt::LeftButton
&& (e->state() & Qt::ControlButton))
{
if (!on_first){
first_x = e->x();
first_y = e->y();
on_first = true;
}
}
}
void mouseReleaseEvent(QMouseEvent *e)
{
if(e->button() == Qt::LeftButton
&& (e->state() & Qt::ControlButton))
{
if((e->x() != first_x) && (e->y() != first_y)) {
double x, y, xfirst2, yfirst2;
widget->x_real(e->x(), x); widget->y_real(e->y(), y);
widget->x_real(first_x, xfirst2); widget->y_real(first_y, yfirst2);
double xmin, xmax, ymin, ymax;
if(x < xfirst2) {xmin = x; xmax = xfirst2;}
else {xmin = xfirst2; xmax = x;};
if(y < yfirst2) {ymin = y; ymax = yfirst2;}
else {ymin = yfirst2; ymax = y;};
widget->set_window(xmin, xmax, ymin, ymax);
on_first = false;
}
}
}
void activating(){
widget->setFocusPolicy(QWidget::ClickFocus);
oldcursor = widget->cursor();
widget->setCursor(crossCursor);
}
QCursor oldcursor;
};
#endif
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