ladanyi@1442: #include <graph_displayer_canvas.h>
ladanyi@1442: #include <math.h>
ladanyi@1442: 
hegyi@1474: GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm, MapStorage & ms):g(gr),nodesmap(g),edgesmap(g),edgetextmap(g),displayed_graph(*(root()), 0, 0),mapstorage(ms),isbutton(false),active_item(NULL),target_item(NULL)
ladanyi@1442: {
hegyi@1468:   
hegyi@1474:   actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
hegyi@1468: 
ladanyi@1442:   //set_center_scroll_region(true);
ladanyi@1442: 
ladanyi@1442:   //first edges are drawn, to hide joining with nodes later
ladanyi@1442: 
ladanyi@1442:   for (EdgeIt i(g); i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442: 
ladanyi@1442:     //drawing green lines, coordinates are from cm
ladanyi@1442: 
ladanyi@1442:     Gnome::Canvas::Points coos;
ladanyi@1442:     coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y));
ladanyi@1442:     coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y));
ladanyi@1442:     
ladanyi@1442:     edgesmap[i]=new Gnome::Canvas::Line(displayed_graph, coos);
ladanyi@1442:     *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");
ladanyi@1442:     edgesmap[i]->property_width_pixels().set_value(10);    
ladanyi@1442:     
ladanyi@1442:     //initializing edge-text as well, to empty string
ladanyi@1442: 
ladanyi@1442:     double x1, x2, y1, y2;
ladanyi@1442:     edgesmap[i]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:     
ladanyi@1442:     edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, "");
ladanyi@1442:     edgetextmap[i]->property_fill_color().set_value("black");
ladanyi@1442:   }
ladanyi@1442: 
ladanyi@1442:   //afterwards nodes come to be drawn
ladanyi@1442: 
ladanyi@1442:   NodeIt i(g);
ladanyi@1442:   int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y;
ladanyi@1442: 
ladanyi@1442:   for (; i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442:     //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen)
ladanyi@1442: 
ladanyi@1442:     if(cm[i].x>maxx)maxx=(int)cm[i].x;
ladanyi@1442:     if(cm[i].y>maxy)maxy=(int)cm[i].y;
ladanyi@1442:     if(cm[i].x<minx)minx=(int)cm[i].x;
ladanyi@1442:     if(cm[i].y<miny)miny=(int)cm[i].y;
ladanyi@1442: 
ladanyi@1442:     //drawing bule nodes, with black line around them
ladanyi@1442: 
ladanyi@1442:     nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);
ladanyi@1442:     *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");
ladanyi@1442:     *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black");
hegyi@1468:     //!!!!!!! (nodesmap[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &GraphDisplayerCanvas::event_handler),i));
ladanyi@1442:   }
ladanyi@1442: 
ladanyi@1442:   updateScrollRegion();
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: GraphDisplayerCanvas::~GraphDisplayerCanvas()
ladanyi@1442: {
ladanyi@1442: 
ladanyi@1442:   //writing out the end state of the graph
ladanyi@1442:   //\todo all the maps has to be write out!
ladanyi@1442: 
ladanyi@1442:   Graph::NodeMap <int> id(g);
ladanyi@1442:   Graph::NodeMap <double> xc(g);
ladanyi@1442:   Graph::NodeMap <double> yc(g);
ladanyi@1442:   
ladanyi@1442:   int j=1;
ladanyi@1442:   
ladanyi@1442:   for (NodeIt i(g); i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442:     double x1,y1,x2,y2;
ladanyi@1442:     nodesmap[i]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:     
ladanyi@1442:     id[i]=j++;
ladanyi@1442:     xc[i]=(x1+x2)/2;
ladanyi@1442:     yc[i]=(y1+y2)/2;
ladanyi@1442:   }
ladanyi@1442: 
ladanyi@1442:   GraphWriter<Graph> writer(std::cout,g);
ladanyi@1442:   
ladanyi@1442:   writer.writeNodeMap("id", id);
ladanyi@1442:   writer.writeNodeMap("coordinates_x", xc);
ladanyi@1442:   writer.writeNodeMap("coordinates_y", yc);
ladanyi@1442:   writer.run();
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: int GraphDisplayerCanvas::changeLineWidth (std::string mapname)
ladanyi@1442: {
ladanyi@1442:   for (EdgeIt i(g); i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442:     int w=(int)(*(mapstorage.edgemap_storage)[mapname])[i];
ladanyi@1442:     edgesmap[i]->property_width_pixels().set_value(w);
ladanyi@1442:   }
ladanyi@1442:   return 0;
ladanyi@1442: };
ladanyi@1442: 
ladanyi@1442: int GraphDisplayerCanvas::changeColor (std::string mapname)
ladanyi@1442: {  
ladanyi@1442: 
ladanyi@1442:   //function maps the range of the maximum and
ladanyi@1442:   //the minimum of the nodemap to the range of
ladanyi@1442:   //green in RGB
ladanyi@1442: 
ladanyi@1442:   for (EdgeIt i(g); i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442:     double w=(*(mapstorage.edgemap_storage)[mapname])[i];
ladanyi@1442:     double max=mapstorage.maxOfEdgeMap(mapname);
ladanyi@1442:     double min=mapstorage.minOfEdgeMap(mapname);
ladanyi@1442:       
ladanyi@1442:     //std::cout<<w<<" "<<max<<" "<<min<<" "<<100*(w-min)/(max-min)<<std::endl;
ladanyi@1442:     Gdk::Color color;
ladanyi@1442:     if(max!=min)
ladanyi@1442:     {
ladanyi@1442:       color.set_rgb_p (0, 100*(w-min)/(max-min), 0);
ladanyi@1442:     }
ladanyi@1442:     else
ladanyi@1442:     {
ladanyi@1442:       color.set_rgb_p (0, 100, 0);
ladanyi@1442:     }
ladanyi@1442: 
ladanyi@1442:     edgesmap[i]->property_fill_color_gdk().set_value(color);
ladanyi@1442:   }
ladanyi@1442:   return 0;
ladanyi@1442: };
ladanyi@1442: 
ladanyi@1442: int GraphDisplayerCanvas::changeText (std::string mapname)
ladanyi@1442: {
ladanyi@1442: 
ladanyi@1442:   //the number in the map will be written on the edge
ladanyi@1442:   //EXCEPT when the name of the map is Text, because
ladanyi@1442:   //in that case empty string will be written, because
ladanyi@1442:   //that is the deleter map
ladanyi@1442:   //\todo isn't it a bit woodcutter?
ladanyi@1442: 
ladanyi@1442:   for (EdgeIt i(g); i!=INVALID; ++i)
ladanyi@1442:   {
ladanyi@1442:     if(mapname!="Text")
ladanyi@1442:     {
ladanyi@1442:       double number=(*(mapstorage.edgemap_storage)[mapname])[i];
ladanyi@1442:       int length=(int)(floor(log(number)/log(10)))+1;
ladanyi@1442:       int maxpos=(int)(pow(10,length-1));
ladanyi@1442:       int strl=length+1+RANGE;
ladanyi@1442:       char * str=new char[strl];
ladanyi@1442:       str[length]='.';
ladanyi@1442:       str[strl]='\0';
ladanyi@1442:       
ladanyi@1442:       for(int j=0;j<strl;j++)
ladanyi@1442:       {
ladanyi@1442: 	if(j!=length)
ladanyi@1442:         {
ladanyi@1442: 	  int digit=(int)(number/maxpos);
ladanyi@1442: 	  str[j]=(digit+'0');
ladanyi@1442: 	  number-=digit*maxpos;
ladanyi@1442: 	  number*=10;
ladanyi@1442:         }
ladanyi@1442:       }
ladanyi@1442:       
ladanyi@1442:       edgetextmap[i]->property_text().set_value(str);
ladanyi@1442:     }
ladanyi@1442:     else
ladanyi@1442:     {
ladanyi@1442:       edgetextmap[i]->property_text().set_value("");
ladanyi@1442:     }
ladanyi@1442:   }
ladanyi@1442:   return 0;
ladanyi@1442: };
ladanyi@1442: 
ladanyi@1442: bool GraphDisplayerCanvas::event_handler(GdkEvent* e, Node n)
ladanyi@1442: {
ladanyi@1442:   switch(e->type)
ladanyi@1442:   {
ladanyi@1442:     case GDK_BUTTON_PRESS:
ladanyi@1442:       //we mark the location of the event to be able to calculate parameters of dragging
ladanyi@1442:       clicked_x=e->button.x;
ladanyi@1442:       clicked_y=e->button.y;
ladanyi@1442:       active_item=(get_item_at(e->button.x, e->button.y));
ladanyi@1442:       isbutton=true;
ladanyi@1442:       break;
ladanyi@1442:     case GDK_BUTTON_RELEASE:
ladanyi@1442:       isbutton=false;
ladanyi@1442:       active_item=NULL;
ladanyi@1444:       updateScrollRegion();
ladanyi@1442:       break;
ladanyi@1442:     case GDK_MOTION_NOTIFY:
ladanyi@1442:       //we only have to do sg. if the mouse button is pressed
ladanyi@1442:       if(isbutton)
ladanyi@1442:       {
ladanyi@1442: 	//new coordinates will be the old values,
ladanyi@1442: 	//because the item will be moved to the
ladanyi@1442: 	//new coordinate therefore the new movement
ladanyi@1442: 	//has to be calculated from here
ladanyi@1442: 
ladanyi@1442:         double dx=e->motion.x-clicked_x;
ladanyi@1442:         double dy=e->motion.y-clicked_y;
ladanyi@1442:         active_item->move(dx, dy);
ladanyi@1442:         clicked_x=e->motion.x;
ladanyi@1442:         clicked_y=e->motion.y;
ladanyi@1442: 
ladanyi@1442: 	//all the edges connected to the moved point has to be redrawn
ladanyi@1442: 
ladanyi@1442:         EdgeIt e;
ladanyi@1442:         g.firstOut(e,n);
ladanyi@1442:         for(;e!=INVALID;g.nextOut(e))
ladanyi@1442:         {
ladanyi@1442:             Gnome::Canvas::Points coos;
ladanyi@1442:             double x1, x2, y1, y2;
ladanyi@1442: 
ladanyi@1442:             nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
ladanyi@1442: 
ladanyi@1442:             nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
ladanyi@1442: 
ladanyi@1442:             edgesmap[e]->property_points().set_value(coos);
ladanyi@1442: 
ladanyi@1442: 	    edgesmap[e]->get_bounds(x1, y1, x2, y2);
ladanyi@1442: 
ladanyi@1442: 	    edgetextmap[e]->property_x().set_value((x1+x2)/2);
ladanyi@1442: 	    edgetextmap[e]->property_y().set_value((y1+y2)/2);
ladanyi@1442:         }
ladanyi@1442: 
ladanyi@1442:         g.firstIn(e,n);
ladanyi@1442:         for(;e!=INVALID;g.nextIn(e))
ladanyi@1442:         {
ladanyi@1442:             Gnome::Canvas::Points coos;
ladanyi@1442:             double x1, x2, y1, y2;
ladanyi@1442: 
ladanyi@1442:             nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
ladanyi@1442: 
ladanyi@1442:             nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
ladanyi@1442:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
ladanyi@1442: 
ladanyi@1442:             edgesmap[e]->property_points().set_value(coos);
ladanyi@1442: 
ladanyi@1442: 	    edgesmap[e]->get_bounds(x1, y1, x2, y2);
ladanyi@1442: 
ladanyi@1442: 	    edgetextmap[e]->property_x().set_value((x1+x2)/2);
ladanyi@1442: 	    edgetextmap[e]->property_y().set_value((y1+y2)/2);
ladanyi@1442:         }
ladanyi@1442:       }
ladanyi@1442:     default: break;
ladanyi@1442:   }
ladanyi@1442:   return true;
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
ladanyi@1442: {
ladanyi@1442:   Gnome::Canvas::CanvasAA::on_expose_event(event);
ladanyi@1442:   //usleep(10000);
ladanyi@1442:   //rezoom();
ladanyi@1442:   return true;
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: void GraphDisplayerCanvas::zoomIn()
ladanyi@1442: {
ladanyi@1442:   set_pixels_per_unit(
ladanyi@1442:       (1.0 + (double) zoom_step / 100.0) * get_pixels_per_unit());
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: void GraphDisplayerCanvas::zoomOut()
ladanyi@1442: {
ladanyi@1442:   set_pixels_per_unit(
ladanyi@1442:       (1.0 - (double) zoom_step / 100.0) * get_pixels_per_unit());
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: void GraphDisplayerCanvas::zoomFit()
ladanyi@1442: {
ladanyi@1442:   // get the height and width of the canvas
ladanyi@1442:   Gtk::Allocation a = get_allocation();
ladanyi@1442:   int aw = a.get_width();
ladanyi@1442:   int ah = a.get_height();
ladanyi@1442:   // add some space
ladanyi@1442:   aw -= 5; if (aw < 0) aw = 0;
ladanyi@1442:   ah -= 5; if (ah < 0) ah = 0;
ladanyi@1442: 
ladanyi@1442:   // get the bounding box of the graph
ladanyi@1442:   double wx1, wy1, wx2, wy2;
ladanyi@1442:   Gnome::Canvas::Item* pCanvasItem = root();
ladanyi@1442:   pCanvasItem->get_bounds(wx1, wy1, wx2, wy2);
ladanyi@1442: 
ladanyi@1442:   // fit the graph to the window
ladanyi@1444:   double ppu1 = (double) aw / fabs(wx2 - wx1);
ladanyi@1444:   double ppu2 = (double) ah / fabs(wy2 - wy1);
ladanyi@1444:   set_pixels_per_unit((ppu1 < ppu2) ? ppu1 : ppu2);
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: void GraphDisplayerCanvas::zoom100()
ladanyi@1442: {
ladanyi@1442:   set_pixels_per_unit(1.0);
ladanyi@1442: }
ladanyi@1442: 
ladanyi@1442: void GraphDisplayerCanvas::updateScrollRegion()
ladanyi@1442: {
ladanyi@1442:   double wx1, wy1, wx2, wy2;
ladanyi@1442:   Gnome::Canvas::Item* pCanvasItem = root();
ladanyi@1442:   pCanvasItem->get_bounds(wx1, wy1, wx2, wy2);
ladanyi@1444:   set_scroll_region(wx1, wy1, wx2, wy2);
ladanyi@1442: }
hegyi@1468: 
hegyi@1468: void GraphDisplayerCanvas::changeEditorialTool(int newtool)
hegyi@1468: {
hegyi@1468:   actual_handler.disconnect();
hegyi@1468: 
hegyi@1468:   switch(newtool)
hegyi@1468:     {
hegyi@1468:     case MOVE:
hegyi@1468:       actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false);
hegyi@1468:       break;
hegyi@1468:     case CREATE_NODE:
hegyi@1468:       actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false);
hegyi@1468:       break;
hegyi@1468:     case CREATE_EDGE:
hegyi@1468:       actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
hegyi@1468:       break;
hegyi@1468:     default:
hegyi@1468:       break;
hegyi@1468:     }
hegyi@1468: }
hegyi@1468: 
hegyi@1468: bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e)
hegyi@1468: {
hegyi@1468:   switch(e->type)
hegyi@1468:   {
hegyi@1468:     case GDK_BUTTON_PRESS:
hegyi@1468:       //we mark the location of the event to be able to calculate parameters of dragging
hegyi@1468:       clicked_x=e->button.x;
hegyi@1468:       clicked_y=e->button.y;
hegyi@1468:       active_item=(get_item_at(e->button.x, e->button.y));
hegyi@1468:       active_node=INVALID;
hegyi@1468:       for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1468: 	{
hegyi@1468: 	  if(nodesmap[i]==active_item)
hegyi@1468: 	    {
hegyi@1468: 	      active_node=i;
hegyi@1468: 	    }
hegyi@1468: 	}
hegyi@1468:       isbutton=true;
hegyi@1468:       break;
hegyi@1468:     case GDK_BUTTON_RELEASE:
hegyi@1468:       isbutton=false;
hegyi@1468:       active_item=NULL;
hegyi@1468:       updateScrollRegion();
hegyi@1468:       break;
hegyi@1468:     case GDK_MOTION_NOTIFY:
hegyi@1468:       //we only have to do sg. if the mouse button is pressed
hegyi@1468:       if(isbutton)
hegyi@1468:       {
hegyi@1468: 	//new coordinates will be the old values,
hegyi@1468: 	//because the item will be moved to the
hegyi@1468: 	//new coordinate therefore the new movement
hegyi@1468: 	//has to be calculated from here
hegyi@1468: 
hegyi@1468:         double dx=e->motion.x-clicked_x;
hegyi@1468:         double dy=e->motion.y-clicked_y;
hegyi@1468: 
hegyi@1468:         active_item->move(dx, dy);
hegyi@1468: 
hegyi@1468:         clicked_x=e->motion.x;
hegyi@1468:         clicked_y=e->motion.y;
hegyi@1468: 
hegyi@1468: 	//all the edges connected to the moved point has to be redrawn
hegyi@1468:         EdgeIt e;
hegyi@1468: 
hegyi@1468:         g.firstOut(e,active_node);
hegyi@1468: 
hegyi@1468:         for(;e!=INVALID;g.nextOut(e))
hegyi@1468:         {
hegyi@1468:             Gnome::Canvas::Points coos;
hegyi@1468:             double x1, x2, y1, y2;
hegyi@1468: 
hegyi@1468:             nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1468:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1468: 
hegyi@1468:             nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1468:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1468: 
hegyi@1468:             edgesmap[e]->property_points().set_value(coos);
hegyi@1468: 
hegyi@1468: 	    edgesmap[e]->get_bounds(x1, y1, x2, y2);
hegyi@1468: 
hegyi@1468: 	    edgetextmap[e]->property_x().set_value((x1+x2)/2);
hegyi@1468: 	    edgetextmap[e]->property_y().set_value((y1+y2)/2);
hegyi@1468:         }
hegyi@1468: 
hegyi@1468:         g.firstIn(e,active_node);
hegyi@1468:         for(;e!=INVALID;g.nextIn(e))
hegyi@1468:         {
hegyi@1468:             Gnome::Canvas::Points coos;
hegyi@1468:             double x1, x2, y1, y2;
hegyi@1468: 
hegyi@1468:             nodesmap[g.source(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1468:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1468: 
hegyi@1468:             nodesmap[g.target(e)]->get_bounds(x1, y1, x2, y2);
hegyi@1468:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1468: 
hegyi@1468:             edgesmap[e]->property_points().set_value(coos);
hegyi@1468: 
hegyi@1468: 	    edgesmap[e]->get_bounds(x1, y1, x2, y2);
hegyi@1468: 
hegyi@1468: 	    edgetextmap[e]->property_x().set_value((x1+x2)/2);
hegyi@1468: 	    edgetextmap[e]->property_y().set_value((y1+y2)/2);
hegyi@1468:         }
hegyi@1468:       }
hegyi@1468:     default: break;
hegyi@1468:   }
hegyi@1468: 
hegyi@1468:   return true;
hegyi@1468: }
hegyi@1468: 
hegyi@1468: bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e)
hegyi@1468: {
hegyi@1468:   switch(e->type)
hegyi@1468:     {
hegyi@1468:     case GDK_BUTTON_PRESS:
hegyi@1468:       isbutton=true;
hegyi@1468: 
hegyi@1468:       active_node=NodeIt(g,g.addNode());
hegyi@1468: 
hegyi@1468:       window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
hegyi@1468: 
hegyi@1468:       nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
hegyi@1468:       active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
hegyi@1468:       *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@1468:       *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black");
hegyi@1468:       (nodesmap[active_node])->show();
hegyi@1468:       break;
hegyi@1468:     case GDK_MOTION_NOTIFY:
hegyi@1468:       {
hegyi@1468: 	double world_motion_x, world_motion_y;
hegyi@1468: 	GdkEvent * generated=new GdkEvent();
hegyi@1468: 	window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y);
hegyi@1468: 	generated->motion.x=world_motion_x;
hegyi@1468: 	generated->motion.y=world_motion_y;
hegyi@1468: 	generated->type=GDK_MOTION_NOTIFY;
hegyi@1468: 	move_event_handler(generated);      
hegyi@1468: 	break;
hegyi@1468:       }
hegyi@1468:     case GDK_BUTTON_RELEASE:
hegyi@1468:       isbutton=false;
hegyi@1468:       *active_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@1468:       active_item=NULL;
hegyi@1468:       updateScrollRegion();
hegyi@1468:       break;
hegyi@1468:     default:
hegyi@1468:       break;
hegyi@1468:     }
hegyi@1468:   return false;
hegyi@1468: }
hegyi@1468: 
hegyi@1468: bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e)
hegyi@1468: {
hegyi@1474:   switch(e->type)
hegyi@1474:     {
hegyi@1474:     case GDK_BUTTON_PRESS:
hegyi@1474:       if(!active_item)
hegyi@1474: 	{
hegyi@1474: 	  //we mark the location of the event to be able to calculate parameters of dragging
hegyi@1474: 	  clicked_x=e->button.x;
hegyi@1474: 	  clicked_y=e->button.y;
hegyi@1474: 	  active_item=(get_item_at(e->button.x, e->button.y));
hegyi@1474: 	  active_node=INVALID;
hegyi@1474: 	  for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1474: 	    {
hegyi@1474: 	      if(nodesmap[i]==active_item)
hegyi@1474: 		{
hegyi@1474: 		  active_node=i;
hegyi@1474: 		}
hegyi@1474: 	    }
hegyi@1474: 	  *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@1474: 	  isbutton=true;
hegyi@1474: 	}
hegyi@1474:       else
hegyi@1474: 	{
hegyi@1474: 	  target_item=(get_item_at(e->button.x, e->button.y));
hegyi@1474: 	  Graph::NodeIt target_node=INVALID;
hegyi@1474: 	  for (NodeIt i(g); i!=INVALID; ++i)
hegyi@1474: 	    {
hegyi@1474: 	      if(nodesmap[i]==target_item)
hegyi@1474: 		{
hegyi@1474: 		  target_node=i;
hegyi@1474: 		}
hegyi@1474: 	    }
hegyi@1474: 	  *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@1474: 
hegyi@1474: 	  //creating new edge
hegyi@1474: 	  //	  Graph::Edge new_edge=g.addEdge(active_node, target_node);
hegyi@1474: 	  active_edge=EdgeIt(g,g.addEdge(active_node, target_node));
hegyi@1474: 	  
hegyi@1474: 	  //calculating coordinates of new edge
hegyi@1474: 	  Gnome::Canvas::Points coos;
hegyi@1474: 	  double x1, x2, y1, y2;
hegyi@1474: 	  
hegyi@1474: 	  active_item->get_bounds(x1, y1, x2, y2);
hegyi@1474: 	  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1474: 
hegyi@1474: 	  target_item->get_bounds(x1, y1, x2, y2);
hegyi@1474: 	  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@1474: 
hegyi@1474: 	  //drawing new edge
hegyi@1474: 	  edgesmap[active_edge]=new Gnome::Canvas::Line(displayed_graph, coos);
hegyi@1474: 	  *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green");
hegyi@1474: 	  edgesmap[active_edge]->property_width_pixels().set_value(10);
hegyi@1474: 
hegyi@1474: 	  //redraw nodes to blank terminations of the new edge
hegyi@1474: 	  target_item->raise_to_top();
hegyi@1474: 	  active_item->raise_to_top();
hegyi@1474: 
hegyi@1474: 	  //initializing edge-text as well, to empty string
hegyi@1474: 	  edgesmap[active_edge]->get_bounds(x1, y1, x2, y2);
hegyi@1474: 	  edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph,(x1+x2)/2, (y1+y2)/2, "");
hegyi@1474: 	  edgetextmap[active_edge]->property_fill_color().set_value("black");
hegyi@1474: 	}
hegyi@1474:       break;
hegyi@1474:     case GDK_BUTTON_RELEASE:
hegyi@1474:       isbutton=false;
hegyi@1474:       if(target_item)
hegyi@1474: 	{
hegyi@1474: 	  *active_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@1474: 	  *target_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@1474: 	  active_item=NULL;
hegyi@1474: 	  target_item=NULL;
hegyi@1474: 	}
hegyi@1474:       break;
hegyi@1474:     default:
hegyi@1474:       break;
hegyi@1474:     }
hegyi@1468:   return false;
hegyi@1468: }
hegyi@1468: