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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/Qt_widget_get_iso_rectangle.h $
// $Id: Qt_widget_get_iso_rectangle.h 32795 2006-07-30 16:38:54Z spion $
//
//
// Author(s) : Radu Ursu
#ifndef CGAL_QT_WIDGET_GET_ISO_RECTANGLE_H
#define CGAL_QT_WIDGET_GET_ISO_RECTANGLE_H
#include <CGAL/IO/Qt_widget.h>
#include <CGAL/IO/Qt_widget_layer.h>
#include <qrect.h>
#include <qcursor.h>
#ifndef CGAL_QT_LEFT_BUTTON
#define CGAL_QT_LEFT_BUTTON Qt::LeftButton
#endif
namespace CGAL {
template <class T>
class Qt_widget_get_iso_rectangle : public Qt_widget_layer
{
private:
QCursor cursor;
QCursor oldcursor;
public:
int first_x, first_y, x2, y2;
bool widgetrepainted;
bool on_first;
QWidget::FocusPolicy oldpolicy;
typedef typename T::Iso_rectangle_2 Iso_rectangle_2;
typedef typename T::RT RT;
Qt_widget_get_iso_rectangle(const QCursor
c=QCursor(Qt::crossCursor),
QObject* parent = 0, const char* name = 0)
: Qt_widget_layer(parent, name), cursor(c), widgetrepainted(true),
on_first(false) {};
void draw(){
widgetrepainted = true;
};
protected:
bool is_pure(Qt::ButtonState s){
if((s & Qt::ControlButton) ||
(s & Qt::ShiftButton) ||
(s & Qt::AltButton))
return 0;
else
return 1;
}
void mousePressEvent(QMouseEvent *e)
{
if(e->button() == CGAL_QT_LEFT_BUTTON
&& is_pure(e->state()))
{
if (!on_first)
{
first_x = e->x();
first_y = e->y();
on_first = true;
} else {
if((e->x() != first_x) && (e->y() != first_y)) {
RT 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);
RT 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->new_object(
make_object(Iso_rectangle_2(xmin, ymin,
xmax, ymax)));
on_first = false;
widgetrepainted = true;
}
}
}
};
void mouseMoveEvent(QMouseEvent *e)
{
if(on_first)
{
int x = e->x();
int y = e->y();
*widget << noFill;
RasterOp old = widget->rasterOp(); //save the initial raster mode
QColor old_color=widget->color();
widget->setRasterOp(XorROP);
widget->lock();
widget->setColor(Qt::green);
if(!widgetrepainted)
widget->get_painter().drawRect(first_x, first_y,
x2 - first_x, y2 - first_y);
widget->get_painter().drawRect(first_x, first_y, x - first_x,
y - first_y);
widget->unlock();
widget->setColor(old_color);
widget->setRasterOp(old);
//save the last coordinates to redraw the screen
x2 = x;
y2 = y;
widgetrepainted = false;
}
};
void keyPressEvent(QKeyEvent *e)
{
switch ( e->key() ) {
case Key_Escape: // key_escape
if (on_first)
{
widget->lock();
*widget << noFill;
RasterOp old = widget->rasterOp(); //save the initial raster mode
QColor old_color=widget->color();
widget->setRasterOp(XorROP);
*widget << CGAL::GREEN;
if(!widgetrepainted)
widget->get_painter().drawRect(first_x, first_y,
x2 - first_x, y2 - first_y);
widget->setColor(old_color);
widget->setRasterOp(old);
widgetrepainted = true;
widget->unlock();
on_first = false;
}
break;
}//endswitch
}
void leaveEvent(QEvent *)
{
if (on_first)
{
widget->lock();
*widget << noFill;
RasterOp old = widget->rasterOp(); //save the initial raster mode
QColor old_color=widget->color();
widget->setRasterOp(XorROP);
*widget << CGAL::GREEN;
if(!widgetrepainted)
widget->get_painter().drawRect(first_x, first_y,
x2 - first_x, y2 - first_y);
widget->setColor(old_color);
widget->setRasterOp(old);
widgetrepainted = true;
widget->unlock();
}
}
void activating()
{
oldpolicy = widget->focusPolicy();
widget->setFocusPolicy(QWidget::StrongFocus);
oldcursor = widget->cursor();
widget->setCursor(cursor);
widgetrepainted = true;
};
void deactivating()
{
widget->setCursor(oldcursor);
widget->setFocusPolicy(oldpolicy);
on_first = false;
};
};//end class
} // namespace CGAL
#endif
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