// ============================================================================
//
// Copyright (c) 1997-2003 The CGAL Consortium
// This software and related documentation are part of the Computational
// Geometry Algorithms Library (CGAL).
// This software and documentation are provided "as-is" and without warranty
// of any kind. In no event shall the CGAL Consortium be liable for any
// damage of any kind.
// ----------------------------------------------------------------------
//
// file : main.C
// package : Qt_widget
// author(s) : Radu Ursu
// coordinator : Laurent Rineau
//
// email : contact@cgal.org
// www : http://www.cgal.org
//
// ======================================================================
// if QT is not installed, a message will be issued in runtime.
#ifndef CGAL_USE_QT
#include <iostream>
int main(int, char*)
{
std::cout << "Sorry, this demo needs QT...";
std::cout << std::endl;
return 0;
}
#else
#include "cgal_types3.h"
#include <fstream>
#include <stack>
#include <set>
#include <string>
#include <list>
#include <CGAL/IO/Qt_widget.h>
#include <CGAL/IO/Qt_widget_Polygon_2.h>
#include "Qt_widget_toolbar3.h"
#include <CGAL/IO/Qt_widget_standard_toolbar.h>
#include <CGAL/IO/Qt_help_window.h>
#include <CGAL/IO/Qt_widget_layer.h>
#include <qplatinumstyle.h>
#include <qapplication.h>
#include <qmainwindow.h>
#include <qstatusbar.h>
#include <qfiledialog.h>
#include <qmessagebox.h>
#include <qpopupmenu.h>
#include <qmenubar.h>
#include <qtoolbutton.h>
#include <qtoolbar.h>
#include <qfiledialog.h>
#include <qtimer.h>
const QString my_title_string("Arrangement Demo with"
" CGAL Qt_widget");
//global flags and variables
int current_state;
std::list<Curve> list_of_segments;
std::list<Cgal_Polygon> list_of_polygons;
Arr arr;
bool pl_valid=false;
Point pl_point;
class Qt_layer_show_ch : public CGAL::Qt_widget_layer
{
public:
Qt_layer_show_ch(){};
void draw()
{
widget->lock();
*widget << CGAL::GREEN;
*widget << CGAL::LineWidth(1);
std::list<Cgal_Polygon>::iterator itp = list_of_polygons.begin();
while(itp!=list_of_polygons.end()){
Cgal_Polygon::Edge_const_iterator eci = (*itp).edges_begin();
Cgal_Polygon::Edge_const_iterator last_edge=(*itp).edges_end();
last_edge--;
while(eci != last_edge )
{
*widget << (*eci++);
}
itp++;
}
if(pl_valid && !(arr.halfedges_begin() == arr.halfedges_end()) )
{
*widget << CGAL::LineWidth(3);
*widget << CGAL::YELLOW;
Arr::Locate_type lt;
Arr::Point temp_p(pl_point.x(),pl_point.y());
Arr::Halfedge_handle e = arr.locate(temp_p, lt);
// std::cout << "locate type " << lt << std::endl;
//color the face on the screen
Arr::Face_handle f=e->face();
if (f->does_outer_ccb_exist())
{
Arr::Ccb_halfedge_circulator cc=f->outer_ccb();
do {
CGAL::Polyline_2<Seg_traits>::const_iterator points_iter;
for (points_iter = cc->curve().begin();
points_iter != cc->curve().end(); )
{
CGAL::Polyline_2<Seg_traits>::const_iterator source_point =
points_iter;
points_iter++;
CGAL::Polyline_2<Seg_traits>::const_iterator target_point =
points_iter;
if (target_point == cc->curve().end())
break;
Segment s(*source_point, *target_point);
*widget << s;
}
} while (++cc != f->outer_ccb());
}
Arr::Holes_iterator hit=f->holes_begin(),eit=f->holes_end();
for (;hit!=eit; ++hit)
{
Arr::Ccb_halfedge_circulator cc=*hit;
do
{
CGAL::Polyline_2<Seg_traits>::const_iterator points_iter;
for (points_iter = cc->curve().begin();
points_iter != cc->curve().end(); )
{
CGAL::Polyline_2<Seg_traits>::const_iterator source_point =
points_iter;
points_iter++;
CGAL::Polyline_2<Seg_traits>::const_iterator target_point =
points_iter;
if (target_point == cc->curve().end())
break;
Segment s(*source_point, *target_point);
*widget << s;
}
} while (++cc != *hit);
}
*widget << CGAL::LineWidth(1);
}
widget->unlock();
};
void mousePressEvent(QMouseEvent *e)
{
if(e->button() == Qt::MidButton)
{
pl_valid = false;
if( list_of_polygons.empty() )
return;
NT x=static_cast<NT>(widget->x_real(e->x()));
NT y=static_cast<NT>(widget->y_real(e->y()));
Point p(x,y);
NT min_dist=100000000;
std::list<Cgal_Polygon>::iterator it_closest=NULL;
std::list<Cgal_Polygon>::iterator pit = list_of_polygons.begin();
Segment closest_segment;
while(pit!=list_of_polygons.end())
{
Cgal_Polygon::Edge_const_iterator eit = (*pit).edges_begin();
Cgal_Polygon::Edge_const_iterator last_edge=(*pit).edges_end();
last_edge--;
while(eit != last_edge )
{
NT dist = CGAL::squared_distance( p, (*eit));
if( dist < min_dist)
{
min_dist = dist;
it_closest = pit;
closest_segment = (*eit);
}
eit++;
}
pit++;
}
Arr::Curve_iterator ci = arr.curve_node_begin();
while(ci != arr.curve_node_end() )
{
bool found=false;
CGAL::Polyline_2<Seg_traits>::const_iterator points_iter;
for (points_iter = ci->curve().begin();
points_iter != ci->curve().end(); )
{
CGAL::Polyline_2<Seg_traits>::const_iterator source_point =
points_iter;
points_iter++;
CGAL::Polyline_2<Seg_traits>::const_iterator target_point =
points_iter;
if (target_point == ci->curve().end())
break;
Segment s(*source_point, *target_point);
if(s == closest_segment)
{
arr.remove_curve(ci);
found=true;
break;
}
}
if(found)
break;
ci++;
}
list_of_polygons.erase( it_closest );
// list_of_covering.clear();
// list_of_segments.clear();
(*widget).redraw();
}
};
};//end class
class MyWindow : public QMainWindow
{
Q_OBJECT
public:
MyWindow(int w, int h){
widget = new CGAL::Qt_widget(this);
setCentralWidget(widget);
//create a timer for checking if somthing changed
QTimer *timer = new QTimer( this );
connect( timer, SIGNAL(timeout()),
this, SLOT(timer_done()) );
timer->start( 200, FALSE );
// file menu
QPopupMenu * file = new QPopupMenu( this );
menuBar()->insertItem( "&File", file );
file->insertItem("&New", this, SLOT(new_instance()), CTRL+Key_N);
file->insertItem("New &Window", this, SLOT(new_window()), CTRL+Key_W);
file->insertSeparator();
file->insertItem("Print", widget, SLOT(print_to_ps()), CTRL+Key_P);
file->insertSeparator();
file->insertItem( "&Close", this, SLOT(close()), CTRL+Key_X );
file->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q );
// drawing menu
QPopupMenu * draw = new QPopupMenu( this );
menuBar()->insertItem( "&Draw", draw );
draw->insertItem("&Generate polylines", this,
SLOT(gen_segments()), CTRL+Key_G );
// help menu
QPopupMenu * help = new QPopupMenu( this );
menuBar()->insertItem( "&Help", help );
help->insertItem("How To", this, SLOT(howto()), Key_F1);
help->insertSeparator();
help->insertItem("&About", this, SLOT(about()), CTRL+Key_A );
help->insertItem("About &Qt", this, SLOT(aboutQt()) );
//the standard toolbar
stoolbar = new CGAL::Qt_widget_standard_toolbar (widget, this, "ST");
//the new tools toolbar
newtoolbar = new Tools_toolbar(widget, this, &list_of_segments);
*widget << CGAL::LineWidth(2) << CGAL::BackgroundColor (CGAL::BLACK);
resize(w,h);
widget->set_window(-1, 1, -1, 1);
widget->setMouseTracking(TRUE);
//connect the widget to the main function that receives the objects
connect(widget, SIGNAL(new_cgal_object(CGAL::Object)),
this, SLOT(get_new_object(CGAL::Object)));
//application flag stuff
old_state = 0;
//layers
widget->attach(&testlayer);
};
private:
void something_changed(){current_state++;};
public slots:
void new_instance()
{
widget->lock();
list_of_segments.clear();
stoolbar->clear_history();
widget->set_window(-1.1, 1.1, -1.1, 1.1);
// set the Visible Area to the Interval
widget->unlock();
something_changed();
}
private slots:
void get_new_object(CGAL::Object obj)
{
pl_valid = false;
Cgal_Polygon pol;
if(CGAL::assign(pol,obj))
{
list_of_polygons.push_back(pol);
std::vector<Point> pts;
Cgal_Polygon::Edge_const_iterator eci = pol.edges_begin();
while(eci != pol.edges_end() )
{
Curve c= *eci++;
Seg_traits ST;
pts.push_back( ST.curve_source(c) );
}
Traits::Curve_2 pol( pts.begin(), pts.end() );
arr.insert( pol );
something_changed();
}
Point p;
if(CGAL::assign(p,obj)) {
pl_point = p;
pl_valid = true;
something_changed();
}
};
void about()
{
QMessageBox::about( this, my_title_string,
"This is a demo for the Arrangement package\n"
"Copyright CGAL @2003");
};
void aboutQt()
{
QMessageBox::aboutQt( this, my_title_string );
}
void howto(){
QString home;
home = "help/index.html";
CGAL::Qt_help_window * help =
new CGAL::Qt_help_window(home, ".", 0, "help viewer");
help->resize(400, 400);
help->setCaption("Demo HowTo");
help->show();
}
void new_window(){
MyWindow *ed = new MyWindow(500, 500);
ed->setCaption("Layer");
ed->stoolbar->clear_history();
ed->widget->set_window(-1.1, 1.1, -1.1, 1.1);
ed->show();
something_changed();
}
void timer_done()
{
if(old_state!=current_state){
widget->redraw();
old_state = current_state;
}
}
void gen_segments()
{
stoolbar->clear_history();
widget->set_window(-1.1, 1.1, -1.1, 1.1);
// send resizeEvent only on show.
std::list<Point> list_of_points;
CGAL::Random_points_in_square_2<Point> g(1);
for(int count=0; count<5; count++)
{
list_of_points.clear();
for(int i=0; i<5; i++)
{
list_of_points.push_back(*g++);
}
CGAL::Polyline_2<Seg_traits> p(list_of_points.begin(),
list_of_points.end() );
Cgal_Polygon pol(list_of_points.begin(), list_of_points.end() );
list_of_polygons.push_back(pol);
arr.insert(p);
}
pl_valid = false;
something_changed();
}
private:
CGAL::Qt_widget *widget;
CGAL::Qt_widget_standard_toolbar
*stoolbar;
Tools_toolbar *newtoolbar;
int old_state;
Qt_layer_show_ch testlayer;
};
#include "demo3.moc"
int
main(int argc, char **argv)
{
QApplication app( argc, argv );
MyWindow widget(500,500); // physical window size
app.setMainWidget(&widget);
widget.setCaption(my_title_string);
widget.setMouseTracking(TRUE);
widget.show();
current_state = -1;
return app.exec();
}
#endif // CGAL_USE_QT
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