hegyi@17: #include <broken_edge.h>
hegyi@19: #include <lemon/xy.h>
hegyi@19: #include <math.h>
hegyi@17: 
hegyi@21: BrokenEdge::BrokenEdge(Gnome::Canvas::Group & g, Gnome::Canvas::Points p, GraphDisplayerCanvas & gc) : Line(g), gdc(gc), isbutton(false)
hegyi@17: {
hegyi@19:   my_points=new Gnome::Art::Point[3];
hegyi@19: 
hegyi@19:   arrow=new Gnome::Canvas::Polygon(g);
hegyi@19:   *arrow << Gnome::Canvas::Properties::fill_color("red");
hegyi@19:   arrow->signal_event().connect(sigc::mem_fun(*this, &BrokenEdge::edge_former_event_handler));
hegyi@19:   set_points(p);
hegyi@19: }
hegyi@19: 
hegyi@19: BrokenEdge::~BrokenEdge()
hegyi@19: {
hegyi@19:   if(arrow)delete(arrow);
hegyi@19: }
hegyi@19: 
hegyi@20: void BrokenEdge::set_points(Gnome::Canvas::Points p, bool move)
hegyi@19: {
hegyi@19:   bool set_arrow=false;
hegyi@20:   if(!move)
hegyi@17:     {
hegyi@20:       if(p.size()==2)
hegyi@20: 	{
hegyi@20: 	  set_arrow=true;
hegyi@20: 	  Gnome::Canvas::Points points_with_center;
hegyi@20: 	  points_with_center.push_back(my_points[0]=p[0]);
hegyi@20: 	  points_with_center.push_back(my_points[1]=Gnome::Art::Point( (p[0].get_x()+p[1].get_x())/2+0 , (p[0].get_y()+p[1].get_y())/2 )+0 );
hegyi@20: 	  points_with_center.push_back(my_points[2]=p[1]);
hegyi@20: 	  property_points().set_value(points_with_center);
hegyi@20: 	}  
hegyi@20:       if(p.size()==3)
hegyi@20: 	{
hegyi@20: 	  set_arrow=true;
hegyi@20: 	  property_points().set_value(p);
hegyi@20: 	  for(int i=0;i<3;i++)
hegyi@20: 	    {
hegyi@20: 	      my_points[i]=p[i];
hegyi@20: 	    }
hegyi@20: 	}
hegyi@20:     }
hegyi@20:   else
hegyi@19:     {
hegyi@20:       if(p.size()==2)
hegyi@19: 	{
hegyi@20: 	  Gnome::Canvas::Points points;
hegyi@20: 	  my_points[0]=p[0];
hegyi@20: 	  my_points[2]=p[1];
hegyi@20: 	  for(int i=0;i<3;i++)
hegyi@20: 	    {
hegyi@20: 	      points.push_back(my_points[i]);
hegyi@20: 	    }
hegyi@20: 	  property_points().set_value(points);
hegyi@19: 	}
hegyi@19:     }
hegyi@19: 
hegyi@19:   if(set_arrow)
hegyi@19:     {
hegyi@19:       //calculating coordinates of the direction indicator arrow
hegyi@19: 
hegyi@19:       xy<gdouble> target( my_points[2].get_x(), my_points[2].get_y() );
hegyi@19:       xy<gdouble> center( my_points[1].get_x(), my_points[1].get_y() );
hegyi@19: 
hegyi@19:       xy<gdouble> unit_vector_in_dir(target-center);
hegyi@19:       //       std::cout << target << " - " << center << " = " << unit_vector_in_dir << "    / " <<unit_vector_in_dir.normSquare() ;
hegyi@19:       unit_vector_in_dir/=sqrt( unit_vector_in_dir.normSquare() );
hegyi@19:       //       std::cout << " = " << unit_vector_in_dir << std::endl;
hegyi@19: 
hegyi@19:       xy<gdouble> unit_norm_vector(0-unit_vector_in_dir.y, unit_vector_in_dir.x);
hegyi@19:       //       std::cout << unit_norm_vector << std::endl;
hegyi@19: 
hegyi@19:       {      
hegyi@24: 	//       /\       // top
hegyi@24: 	//      /  \      //
hegyi@24: 	//      -  -      // c(enter)l(eft), ccl, ccr, cr
hegyi@24: 	//       ||       //
hegyi@24: 	//       ||       // b(ottom)l, br
hegyi@19:       }
hegyi@19: 
hegyi@19:       double size=3;
hegyi@19: 
hegyi@19:       xy<gdouble> bl (center - unit_vector_in_dir * 3 * size + unit_norm_vector * size );
hegyi@19:       xy<gdouble> br (center - unit_vector_in_dir * 3 * size - unit_norm_vector * size );
hegyi@19:       xy<gdouble> ccl(center + unit_vector_in_dir *  size + unit_norm_vector * size );
hegyi@19:       xy<gdouble> ccr(center + unit_vector_in_dir *  size - unit_norm_vector * size );
hegyi@19:       xy<gdouble> cl (center + unit_vector_in_dir *  size + unit_norm_vector * 2 * size );
hegyi@19:       xy<gdouble> cr (center + unit_vector_in_dir *  size - unit_norm_vector * 2 * size );
hegyi@19:       xy<gdouble> top(center + unit_vector_in_dir * 3 * size);
hegyi@19: 	 
hegyi@19:       //       std::cout << bl << " " << br << " " << ccl << " "  << ccr << " " << cl << " " << cr << " " << top << std::endl;
hegyi@19: 
hegyi@19:       Gnome::Canvas::Points arrow_points;
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( bl.x , bl.y  ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( br.x , br.y  ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( ccr.x, ccr.y ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( cr.x , cr.y  ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( top.x, top.y ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( cl.x , cl.y  ) );
hegyi@19:       arrow_points.push_back(Gnome::Art::Point( ccl.x, ccl.y ) );
hegyi@19: 
hegyi@19:       arrow->property_points().set_value(arrow_points);
hegyi@17:     }
hegyi@17: }
hegyi@19: 
hegyi@19: bool BrokenEdge::edge_former_event_handler(GdkEvent* e)
hegyi@19: {
hegyi@19:   switch(e->type)
hegyi@19:     {
hegyi@19:     case GDK_BUTTON_PRESS:
hegyi@19:       //we mark the location of the event to be able to calculate parameters of dragging
hegyi@21:       if(gdc.get_actual_tool()!=CREATE_NODE)
hegyi@21: 	{
hegyi@21: 	  clicked_x=e->button.x;
hegyi@21: 	  clicked_y=e->button.y;
hegyi@21: 	  isbutton=true;
hegyi@21: 	}
hegyi@19:       break;
hegyi@19:     case GDK_BUTTON_RELEASE:
hegyi@19:       isbutton=false;
hegyi@19:       break;
hegyi@19:     case GDK_MOTION_NOTIFY:
hegyi@19:       //we only have to do sg. if the mouse button is pressed
hegyi@19:       if(isbutton)
hegyi@19: 	{
hegyi@19: 	  //new coordinates will be the old values,
hegyi@19: 	  //because the item will be moved to the
hegyi@19: 	  //new coordinate therefore the new movement
hegyi@19: 	  //has to be calculated from here
hegyi@19: 
hegyi@19: 	  double dx=e->motion.x-clicked_x;
hegyi@19: 	  double dy=e->motion.y-clicked_y;
hegyi@19: 
hegyi@19: 	  Gnome::Canvas::Points points_new;
hegyi@19: 
hegyi@19: 	  points_new.push_back(my_points[0]);
hegyi@19: 	  points_new.push_back(my_points[1]=Gnome::Art::Point(my_points[1].get_x()+dx,my_points[1].get_y()+dy));
hegyi@19: 	  points_new.push_back(my_points[2]);
hegyi@19: 
hegyi@19: 	  set_points(points_new);
hegyi@19: 
hegyi@19: 	  clicked_x=e->motion.x;
hegyi@19: 	  clicked_y=e->motion.y;
hegyi@19: 
hegyi@19: 	}
hegyi@19:     default: break;
hegyi@19:     }
hegyi@19: 
hegyi@19:   return true;
hegyi@19: }