hegyi@27: #include <graph_displayer_canvas.h>
hegyi@27: #include <broken_edge.h>
hegyi@27: #include <math.h>
hegyi@27: 
hegyi@27: 
hegyi@27: bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
hegyi@27: {
hegyi@27:   Gnome::Canvas::CanvasAA::on_expose_event(event);
hegyi@27:   //usleep(10000);
hegyi@27:   //rezoom();
hegyi@27:   return true;
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::changeEditorialTool(int newtool)
hegyi@27: {
hegyi@27:   actual_handler.disconnect();
hegyi@27: 
hegyi@27:   if(actual_tool==CREATE_EDGE)
hegyi@27:     {
hegyi@27: 	GdkEvent * generated=new GdkEvent();
hegyi@27: 	generated->type=GDK_BUTTON_RELEASE;
hegyi@27: 	generated->button.button=3;
hegyi@27: 	create_edge_event_handler(generated);      
hegyi@27:     }
hegyi@27: 
hegyi@27:   actual_tool=newtool;
hegyi@27: 
hegyi@27:   switch(newtool)
hegyi@27:     {
hegyi@27:     case MOVE:
hegyi@27:       actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false);
hegyi@27:       break;
hegyi@27: 
hegyi@27:       //it has to assigned to canvas, because all the canvas has to be monitored, not only the elements of the already drawn group
hegyi@27:     case CREATE_NODE:
hegyi@27:       actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false);
hegyi@27:       break;
hegyi@27: 
hegyi@27:     case CREATE_EDGE:
hegyi@27:       actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
hegyi@27:       break;
hegyi@27: 
hegyi@27:     case ERASER:
hegyi@27:       actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false);
hegyi@27:       break;
hegyi@27: 
hegyi@27:     default:
hegyi@27:       break;
hegyi@27:     }
hegyi@27: }
hegyi@27: 
hegyi@27: int GraphDisplayerCanvas::get_actual_tool()
hegyi@27: {
hegyi@27:   return actual_tool;
hegyi@27: }
hegyi@27: 
hegyi@27: bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e)
hegyi@27: {
hegyi@27:   switch(e->type)
hegyi@27:   {
hegyi@27:     case GDK_BUTTON_PRESS:
hegyi@27:       //we mark the location of the event to be able to calculate parameters of dragging
hegyi@27:       clicked_x=e->button.x;
hegyi@27:       clicked_y=e->button.y;
hegyi@27:       active_item=(get_item_at(e->button.x, e->button.y));
hegyi@27:       active_node=INVALID;
hegyi@27:       for (NodeIt i(g); i!=INVALID; ++i)
hegyi@27: 	{
hegyi@27: 	  if(nodesmap[i]==active_item)
hegyi@27: 	    {
hegyi@27: 	      active_node=i;
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:       switch(e->button.button)
hegyi@27: 	{
hegyi@27: 	case 3:      
hegyi@27: 	  isbutton=3;
hegyi@27: 	  break;
hegyi@27: 	default:
hegyi@27: 	  isbutton=1;
hegyi@27: 	  break;
hegyi@27: 	}
hegyi@27:       break;
hegyi@27:     case GDK_BUTTON_RELEASE:
hegyi@27:       isbutton=0;
hegyi@27:       active_item=NULL;
hegyi@27:       active_node=INVALID;
hegyi@27:       updateScrollRegion();
hegyi@27:       break;
hegyi@27:     case GDK_MOTION_NOTIFY:
hegyi@27:       //we only have to do sg. if the mouse button is pressed AND the click was on a node that was found in the set of nodes
hegyi@27:       if(active_node!=INVALID)
hegyi@27:       {
hegyi@27: 	//new coordinates will be the old values,
hegyi@27: 	//because the item will be moved to the
hegyi@27: 	//new coordinate therefore the new movement
hegyi@27: 	//has to be calculated from here
hegyi@27: 
hegyi@27:         double dx=e->motion.x-clicked_x;
hegyi@27:         double dy=e->motion.y-clicked_y;
hegyi@27: 
hegyi@27:         active_item->move(dx, dy);
hegyi@27: 
hegyi@27:         clicked_x=e->motion.x;
hegyi@27:         clicked_y=e->motion.y;
hegyi@27: 
hegyi@27: 	//all the edges connected to the moved point has to be redrawn
hegyi@27:         EdgeIt ei;
hegyi@27: 
hegyi@27:         g.firstOut(ei,active_node);
hegyi@27: 
hegyi@27:         for(;ei!=INVALID;g.nextOut(ei))
hegyi@27:         {
hegyi@27:             Gnome::Canvas::Points coos;
hegyi@27:             double x1, x2, y1, y2;
hegyi@27: 
hegyi@27:             nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
hegyi@27:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27:             nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
hegyi@27:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27: 	    if(isbutton==3)
hegyi@27: 	      {
hegyi@27: 		edgesmap[ei]->set_points(coos);
hegyi@27: 	      }
hegyi@27: 	    else
hegyi@27: 	      {
hegyi@27: 		edgesmap[ei]->set_points(coos,true);
hegyi@27: 	      }
hegyi@27: 
hegyi@27: 	    xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
hegyi@27: 	    text_pos+=(xy<double>(10,10));
hegyi@27: 	    edgetextmap[ei]->property_x().set_value(text_pos.x);
hegyi@27: 	    edgetextmap[ei]->property_y().set_value(text_pos.y);
hegyi@27:         }
hegyi@27: 
hegyi@27:         g.firstIn(ei,active_node);
hegyi@27:         for(;ei!=INVALID;g.nextIn(ei))
hegyi@27:         {
hegyi@27:             Gnome::Canvas::Points coos;
hegyi@27:             double x1, x2, y1, y2;
hegyi@27: 
hegyi@27:             nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
hegyi@27:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27:             nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
hegyi@27:             coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27: 	    if(isbutton==3)
hegyi@27: 	      {
hegyi@27: 		edgesmap[ei]->set_points(coos);
hegyi@27: 	      }
hegyi@27: 	    else
hegyi@27: 	      {
hegyi@27: 		edgesmap[ei]->set_points(coos,true);
hegyi@27: 	      }
hegyi@27: 
hegyi@27: 	    xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
hegyi@27: 	    text_pos+=(xy<double>(10,10));
hegyi@27: 	    edgetextmap[ei]->property_x().set_value(text_pos.x);
hegyi@27: 	    edgetextmap[ei]->property_y().set_value(text_pos.y);
hegyi@27:         }
hegyi@27:       }
hegyi@27:     default: break;
hegyi@27:   }
hegyi@27: 
hegyi@27:   return true;
hegyi@27: }
hegyi@27: 
hegyi@27: bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e)
hegyi@27: {
hegyi@27:   switch(e->type)
hegyi@27:     {
hegyi@27: 
hegyi@27:       //draw the new node in red at the clicked place
hegyi@27:     case GDK_BUTTON_PRESS:
hegyi@27:       isbutton=1;
hegyi@27: 
hegyi@27:       active_node=NodeIt(g,g.addNode());
hegyi@27: 
hegyi@27:       //initiating values corresponding to new node in maps
hegyi@27:       
hegyi@27: 
hegyi@27:       window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
hegyi@27: 
hegyi@27:       nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
hegyi@27:       active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
hegyi@27:       *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@27:       *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black");
hegyi@27:       (nodesmap[active_node])->show();
hegyi@27:       break;
hegyi@27: 
hegyi@27:       //move the new node
hegyi@27:     case GDK_MOTION_NOTIFY:
hegyi@27:       {
hegyi@27: 	double world_motion_x, world_motion_y;
hegyi@27: 	GdkEvent * generated=new GdkEvent();
hegyi@27: 	window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y);
hegyi@27: 	generated->motion.x=world_motion_x;
hegyi@27: 	generated->motion.y=world_motion_y;
hegyi@27: 	generated->type=GDK_MOTION_NOTIFY;
hegyi@27: 	move_event_handler(generated);      
hegyi@27: 	break;
hegyi@27:       }
hegyi@27: 
hegyi@27:       //finalize the new node
hegyi@27:     case GDK_BUTTON_RELEASE:
hegyi@27:       isbutton=0;
hegyi@27:       *active_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@27:       active_item=NULL;
hegyi@27:       active_node=INVALID;
hegyi@27:       updateScrollRegion();
hegyi@27:       break;
hegyi@27:     default:
hegyi@27:       break;
hegyi@27:     }
hegyi@27:   return false;
hegyi@27: }
hegyi@27: 
hegyi@27: bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e)
hegyi@27: {
hegyi@27:   switch(e->type)
hegyi@27:     {
hegyi@27:     case GDK_BUTTON_PRESS:
hegyi@27:       //in edge creation right button has special meaning
hegyi@27:       if(e->button.button!=3)
hegyi@27: 	{
hegyi@27: 	  //there is not yet selected node
hegyi@27: 	  if(active_node==INVALID)
hegyi@27: 	    {
hegyi@27: 	      //we mark the location of the event to be able to calculate parameters of dragging
hegyi@27: 	      clicked_x=e->button.x;
hegyi@27: 	      clicked_y=e->button.y;
hegyi@27: 	      active_item=(get_item_at(e->button.x, e->button.y));
hegyi@27: 	      active_node=INVALID;
hegyi@27: 	      for (NodeIt i(g); i!=INVALID; ++i)
hegyi@27: 		{
hegyi@27: 		  if(nodesmap[i]==active_item)
hegyi@27: 		    {
hegyi@27: 		      active_node=i;
hegyi@27: 		    }
hegyi@27: 		}
hegyi@27: 	      //the clicked item is really a node
hegyi@27: 	      if(active_node!=INVALID)
hegyi@27: 		{
hegyi@27: 		  *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@27: 		  isbutton=1;
hegyi@27: 		}
hegyi@27: 	      //clicked item was not a node. It could be e.g. edge.
hegyi@27: 	      else
hegyi@27: 		{
hegyi@27: 		  active_item=NULL;
hegyi@27: 		}
hegyi@27: 	    }
hegyi@27: 	  //we only have to do sg. if the mouse button
hegyi@27: 	  // is pressed already once AND the click was
hegyi@27: 	  // on a node that was found in the set of 
hegyi@27: 	  //nodes, and now we only search for the second 
hegyi@27: 	  //node
hegyi@27: 	  else
hegyi@27: 	    {
hegyi@27: 	      target_item=(get_item_at(e->button.x, e->button.y));
hegyi@27: 	      Graph::NodeIt target_node=INVALID;
hegyi@27: 	      for (NodeIt i(g); i!=INVALID; ++i)
hegyi@27: 		{
hegyi@27: 		  if(nodesmap[i]==target_item)
hegyi@27: 		    {
hegyi@27: 		      target_node=i;
hegyi@27: 		    }
hegyi@27: 		}
hegyi@27: 	      //the clicked item is a node, the edge can be drawn
hegyi@27: 	      if(target_node!=INVALID)
hegyi@27: 		{
hegyi@27: 		  *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red");
hegyi@27: 
hegyi@27: 		  //creating new edge
hegyi@27: 		  active_edge=EdgeIt(g,g.addEdge(active_node, target_node));
hegyi@27: 
hegyi@27: 		  //initiating values corresponding to new edge in maps
hegyi@27: 		  mapstorage.init_maps_for_edge(active_edge);
hegyi@27: 	  
hegyi@27: 		  //calculating coordinates of new edge
hegyi@27: 		  Gnome::Canvas::Points coos;
hegyi@27: 		  double x1, x2, y1, y2;
hegyi@27: 	  
hegyi@27: 		  active_item->get_bounds(x1, y1, x2, y2);
hegyi@27: 		  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27: 		  target_item->get_bounds(x1, y1, x2, y2);
hegyi@27: 		  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
hegyi@27: 
hegyi@27: 		  //drawing new edge
hegyi@27: 		  edgesmap[active_edge]=new BrokenEdge(displayed_graph, coos, *this);
hegyi@27: 		  *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green");
hegyi@27: 		  edgesmap[active_edge]->property_width_pixels().set_value(10);
hegyi@27: 
hegyi@27: 		  //redraw nodes to blank terminations of the new edge
hegyi@27: 		  target_item->raise_to_top();
hegyi@27: 		  active_item->raise_to_top();
hegyi@27: 
hegyi@27: 		  //initializing edge-text as well, to empty string
hegyi@27: 		  xy<double> text_pos=edgesmap[active_edge]->get_arrow_pos();
hegyi@27: 		  text_pos+=(xy<double>(10,10));
hegyi@27: 
hegyi@27: 		  edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");
hegyi@27: 		  edgetextmap[active_edge]->property_fill_color().set_value("black");
hegyi@27: 		}
hegyi@27: 	      //clicked item was not a node. it could be an e.g. edge. we do not deal with it furthermore.
hegyi@27: 	      else
hegyi@27: 		{
hegyi@27: 		  target_item=NULL;
hegyi@27: 		}
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:       break;
hegyi@27:     case GDK_BUTTON_RELEASE:
hegyi@27:       isbutton=0;
hegyi@27:       //we clear settings in two cases
hegyi@27:       //1: the edge is ready (target_item has valid value)
hegyi@27:       //2: the edge creation is cancelled with right button
hegyi@27:       if((target_item)||(e->button.button==3))
hegyi@27: 	{
hegyi@27: 	  if(active_item)
hegyi@27: 	    {
hegyi@27: 	      *active_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@27: 	      active_item=NULL;
hegyi@27: 	    }
hegyi@27: 	  if(target_item)
hegyi@27: 	    {
hegyi@27: 	      *target_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@27: 	      target_item=NULL;
hegyi@27: 	    }
hegyi@27: 	  active_node=INVALID;
hegyi@27: 	  active_edge=INVALID;
hegyi@27: 	}
hegyi@27:       break;
hegyi@27:     default:
hegyi@27:       break;
hegyi@27:     }
hegyi@27:   return false;
hegyi@27: }
hegyi@27: 
hegyi@27: bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e)
hegyi@27: {
hegyi@27:   switch(e->type)
hegyi@27:     {
hegyi@27:     case GDK_BUTTON_PRESS:
hegyi@27:       active_item=(get_item_at(e->button.x, e->button.y));
hegyi@27:       active_node=INVALID;
hegyi@27:       active_edge=INVALID;
hegyi@27:       for (NodeIt i(g); i!=INVALID; ++i)
hegyi@27: 	{
hegyi@27: 	  if(nodesmap[i]==active_item)
hegyi@27: 	    {
hegyi@27: 	      active_node=i;
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:       if(active_node==INVALID)
hegyi@27: 	{
hegyi@27: 	  for (EdgeIt i(g); i!=INVALID; ++i)
hegyi@27: 	    {
hegyi@27: 	      if(edgesmap[i]==active_item)
hegyi@27: 		{
hegyi@27: 		  active_edge=i;
hegyi@27: 		}
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:     *active_item << Gnome::Canvas::Properties::fill_color("red");
hegyi@27:       break;
hegyi@27: 
hegyi@27:     case GDK_BUTTON_RELEASE:
hegyi@27:       if(active_item==(get_item_at(e->button.x, e->button.y)))
hegyi@27: 	{
hegyi@27: 	  if(active_node!=INVALID)
hegyi@27: 	    {
hegyi@27: 
hegyi@27: 	      //collecting edges to delete
hegyi@27: 	      EdgeIt e;
hegyi@27: 	      std::set<Graph::Edge> edges_to_delete;
hegyi@27: 
hegyi@27: 	      g.firstOut(e,active_node);
hegyi@27: 	      for(;e!=INVALID;g.nextOut(e))
hegyi@27: 		{
hegyi@27: 		      edges_to_delete.insert(e);
hegyi@27: 		}
hegyi@27: 
hegyi@27: 	      g.firstIn(e,active_node);
hegyi@27: 	      for(;e!=INVALID;g.nextIn(e))
hegyi@27: 		{
hegyi@27: 		      edges_to_delete.insert(e);
hegyi@27: 		}
hegyi@27: 
hegyi@27: 	      //deleting collected edges
hegyi@27: 	      for(std::set<Graph::Edge>::iterator edge_set_it=edges_to_delete.begin();edge_set_it!=edges_to_delete.end();edge_set_it++)
hegyi@27: 		{
hegyi@27: 		  delete_item(*edge_set_it);
hegyi@27: 		}
hegyi@27: 	      delete_item(active_node);
hegyi@27: 	    }
hegyi@27: 	  //a simple edge was chosen
hegyi@27: 	  else
hegyi@27: 	    {
hegyi@27: 	      delete_item(active_edge);
hegyi@27: 	    }
hegyi@27: 
hegyi@27: 	  
hegyi@27: 	}
hegyi@27:       //pointer was moved, deletion is cancelled
hegyi@27:       else
hegyi@27: 	{
hegyi@27: 	  if(active_node!=INVALID)
hegyi@27: 	    {
hegyi@27: 	      *active_item << Gnome::Canvas::Properties::fill_color("blue");
hegyi@27: 	    }
hegyi@27: 	  else
hegyi@27: 	    {
hegyi@27: 	      *active_item << Gnome::Canvas::Properties::fill_color("green");
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:       //reseting datas
hegyi@27:       active_item=NULL;
hegyi@27:       active_edge=INVALID;
hegyi@27:       active_node=INVALID;
hegyi@27:       break;
hegyi@27: 
hegyi@27:     case GDK_MOTION_NOTIFY:
hegyi@27:       break;
hegyi@27: 
hegyi@27:     default:
hegyi@27:       break;
hegyi@27:     }
hegyi@27:   return true;
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::delete_item(NodeIt node_to_delete)
hegyi@27: {
hegyi@27:   delete(nodesmap[node_to_delete]);
hegyi@27:   g.erase(node_to_delete);
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::delete_item(EdgeIt edge_to_delete)
hegyi@27: {
hegyi@27:   delete(edgesmap[edge_to_delete]);
hegyi@27:   g.erase(edge_to_delete);
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::delete_item(Graph::Edge edge_to_delete)
hegyi@27: {
hegyi@27:   delete(edgesmap[edge_to_delete]);
hegyi@27:   g.erase(edge_to_delete);
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::text_reposition(xy<double> new_place)
hegyi@27: {
hegyi@27:   new_place+=(xy<double>(10,10));
hegyi@27:   edgetextmap[active_edge]->property_x().set_value(new_place.x);
hegyi@27:   edgetextmap[active_edge]->property_y().set_value(new_place.y);
hegyi@27: }
hegyi@27: 
hegyi@27: void GraphDisplayerCanvas::toggle_edge_activity(BrokenEdge* active_bre, bool on)
hegyi@27: {
hegyi@27:   if(on)
hegyi@27:     {
hegyi@27:       if(active_edge!=INVALID)
hegyi@27: 	{
hegyi@27: 	  std::cout << "ERROR!!!! Valid edge found!" << std::endl;
hegyi@27: 	}
hegyi@27:       else
hegyi@27: 	{
hegyi@27: 	  for (EdgeIt i(g); i!=INVALID; ++i)
hegyi@27: 	    {
hegyi@27: 	      if(edgesmap[i]==active_bre)
hegyi@27: 		{
hegyi@27: 		  active_edge=i;
hegyi@27: 		}
hegyi@27: 	    }
hegyi@27: 	}
hegyi@27:     }
hegyi@27:   else
hegyi@27:     {
hegyi@27:       if(active_edge!=INVALID)
hegyi@27: 	{
hegyi@27: 	  active_edge=INVALID;
hegyi@27: 	}
hegyi@27:       else
hegyi@27: 	{
hegyi@27: 	  std::cout << "ERROR!!!! Invalid edge found!" << std::endl;
hegyi@27: 	}
hegyi@27:     }
hegyi@27: 
hegyi@27: }