1.1 --- a/graph_displayer_canvas.cc	Mon Jun 13 19:49:33 2005 +0000
     1.2 +++ b/graph_displayer_canvas.cc	Tue Jun 14 15:58:12 2005 +0000
     1.3 @@ -322,6 +322,11 @@
     1.4      case CREATE_EDGE:
     1.5        actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
     1.6        break;
     1.7 +
     1.8 +    case ERASER:
     1.9 +      actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false);
    1.10 +      break;
    1.11 +
    1.12      default:
    1.13        break;
    1.14      }
    1.15 @@ -584,3 +589,87 @@
    1.16    return false;
    1.17  }
    1.18  
    1.19 +bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e)
    1.20 +{
    1.21 +  switch(e->type)
    1.22 +    {
    1.23 +    case GDK_BUTTON_PRESS:
    1.24 +      active_item=(get_item_at(e->button.x, e->button.y));
    1.25 +      active_node=INVALID;
    1.26 +      active_edge=INVALID;
    1.27 +      for (NodeIt i(g); i!=INVALID; ++i)
    1.28 +	{
    1.29 +	  if(nodesmap[i]==active_item)
    1.30 +	    {
    1.31 +	      active_node=i;
    1.32 +	    }
    1.33 +	}
    1.34 +      if(active_node==INVALID)
    1.35 +	{
    1.36 +	  for (EdgeIt i(g); i!=INVALID; ++i)
    1.37 +	    {
    1.38 +	      if(edgesmap[i]==active_item)
    1.39 +		{
    1.40 +		  active_edge=i;
    1.41 +		}
    1.42 +	    }
    1.43 +	}
    1.44 +    *active_item << Gnome::Canvas::Properties::fill_color("red");
    1.45 +      break;
    1.46 +
    1.47 +    case GDK_BUTTON_RELEASE:
    1.48 +      if(active_item==(get_item_at(e->button.x, e->button.y)))
    1.49 +	{
    1.50 +	  if(active_node!=INVALID)
    1.51 +	    {
    1.52 +	      EdgeIt e;
    1.53 +	      g.firstOut(e,active_node);
    1.54 +	      for(;e!=INVALID;g.nextOut(e))
    1.55 +		{
    1.56 +		  delete_item(edgesmap[e]);
    1.57 +		  //edgesmap[e]->property_points().set_value(coos);
    1.58 +		  //edgetextmap[e]->property_y().set_value((y1+y2)/2);
    1.59 +		}
    1.60 +
    1.61 +	      g.firstIn(e,active_node);
    1.62 +	      for(;e!=INVALID;g.nextIn(e))
    1.63 +		{
    1.64 +		  delete_item(edgesmap[e]);
    1.65 +		  //edgesmap[e]->get_bounds(x1, y1, x2, y2);
    1.66 +		  //edgetextmap[e]->property_y().set_value((y1+y2)/2);
    1.67 +		}
    1.68 +	    }
    1.69 +	  delete_item(active_item);
    1.70 +	  
    1.71 +	}
    1.72 +      else
    1.73 +	{
    1.74 +	  if(active_node!=INVALID)
    1.75 +	    {
    1.76 +	      *active_item << Gnome::Canvas::Properties::fill_color("blue");
    1.77 +	    }
    1.78 +	  else
    1.79 +	    {
    1.80 +	      *active_item << Gnome::Canvas::Properties::fill_color("green");
    1.81 +	    }
    1.82 +	}
    1.83 +      active_item=NULL;
    1.84 +      active_edge=INVALID;
    1.85 +      active_node=INVALID;
    1.86 +      break;
    1.87 +
    1.88 +    case GDK_MOTION_NOTIFY:
    1.89 +      break;
    1.90 +
    1.91 +    default:
    1.92 +      break;
    1.93 +    }
    1.94 +  return true;
    1.95 +}
    1.96 +
    1.97 +void GraphDisplayerCanvas::delete_item(Gnome::Canvas::Item * item_to_delete)
    1.98 +{
    1.99 +  //item_to_delete->hide();
   1.100 +  delete(item_to_delete);
   1.101 +}
   1.102 +