diff -r f9113440b667 -r cde847387b5a gui/graph_displayer_canvas-event.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gui/graph_displayer_canvas-event.cc	Fri Jun 24 07:58:18 2005 +0000
@@ -0,0 +1,492 @@
+#include <graph_displayer_canvas.h>
+#include <broken_edge.h>
+#include <math.h>
+
+
+bool GraphDisplayerCanvas::on_expose_event(GdkEventExpose *event)
+{
+  Gnome::Canvas::CanvasAA::on_expose_event(event);
+  //usleep(10000);
+  //rezoom();
+  return true;
+}
+
+void GraphDisplayerCanvas::changeEditorialTool(int newtool)
+{
+  actual_handler.disconnect();
+
+  if(actual_tool==CREATE_EDGE)
+    {
+	GdkEvent * generated=new GdkEvent();
+	generated->type=GDK_BUTTON_RELEASE;
+	generated->button.button=3;
+	create_edge_event_handler(generated);      
+    }
+
+  actual_tool=newtool;
+
+  switch(newtool)
+    {
+    case MOVE:
+      actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::move_event_handler), false);
+      break;
+
+      //it has to assigned to canvas, because all the canvas has to be monitored, not only the elements of the already drawn group
+    case CREATE_NODE:
+      actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_node_event_handler), false);
+      break;
+
+    case CREATE_EDGE:
+      actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::create_edge_event_handler), false);
+      break;
+
+    case ERASER:
+      actual_handler=displayed_graph.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::eraser_event_handler), false);
+      break;
+
+    default:
+      break;
+    }
+}
+
+int GraphDisplayerCanvas::get_actual_tool()
+{
+  return actual_tool;
+}
+
+bool GraphDisplayerCanvas::move_event_handler(GdkEvent* e)
+{
+  switch(e->type)
+  {
+    case GDK_BUTTON_PRESS:
+      //we mark the location of the event to be able to calculate parameters of dragging
+      clicked_x=e->button.x;
+      clicked_y=e->button.y;
+      active_item=(get_item_at(e->button.x, e->button.y));
+      active_node=INVALID;
+      for (NodeIt i(g); i!=INVALID; ++i)
+	{
+	  if(nodesmap[i]==active_item)
+	    {
+	      active_node=i;
+	    }
+	}
+      switch(e->button.button)
+	{
+	case 3:      
+	  isbutton=3;
+	  break;
+	default:
+	  isbutton=1;
+	  break;
+	}
+      break;
+    case GDK_BUTTON_RELEASE:
+      isbutton=0;
+      active_item=NULL;
+      active_node=INVALID;
+      updateScrollRegion();
+      break;
+    case GDK_MOTION_NOTIFY:
+      //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
+      if(active_node!=INVALID)
+      {
+	//new coordinates will be the old values,
+	//because the item will be moved to the
+	//new coordinate therefore the new movement
+	//has to be calculated from here
+
+        double dx=e->motion.x-clicked_x;
+        double dy=e->motion.y-clicked_y;
+
+        active_item->move(dx, dy);
+
+        clicked_x=e->motion.x;
+        clicked_y=e->motion.y;
+
+	//all the edges connected to the moved point has to be redrawn
+        EdgeIt ei;
+
+        g.firstOut(ei,active_node);
+
+        for(;ei!=INVALID;g.nextOut(ei))
+        {
+            Gnome::Canvas::Points coos;
+            double x1, x2, y1, y2;
+
+            nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
+            coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+            nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
+            coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+	    if(isbutton==3)
+	      {
+		edgesmap[ei]->set_points(coos);
+	      }
+	    else
+	      {
+		edgesmap[ei]->set_points(coos,true);
+	      }
+
+	    xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
+	    text_pos+=(xy<double>(10,10));
+	    edgetextmap[ei]->property_x().set_value(text_pos.x);
+	    edgetextmap[ei]->property_y().set_value(text_pos.y);
+        }
+
+        g.firstIn(ei,active_node);
+        for(;ei!=INVALID;g.nextIn(ei))
+        {
+            Gnome::Canvas::Points coos;
+            double x1, x2, y1, y2;
+
+            nodesmap[g.source(ei)]->get_bounds(x1, y1, x2, y2);
+            coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+            nodesmap[g.target(ei)]->get_bounds(x1, y1, x2, y2);
+            coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+	    if(isbutton==3)
+	      {
+		edgesmap[ei]->set_points(coos);
+	      }
+	    else
+	      {
+		edgesmap[ei]->set_points(coos,true);
+	      }
+
+	    xy<double> text_pos=edgesmap[ei]->get_arrow_pos();
+	    text_pos+=(xy<double>(10,10));
+	    edgetextmap[ei]->property_x().set_value(text_pos.x);
+	    edgetextmap[ei]->property_y().set_value(text_pos.y);
+        }
+      }
+    default: break;
+  }
+
+  return true;
+}
+
+bool GraphDisplayerCanvas::create_node_event_handler(GdkEvent* e)
+{
+  switch(e->type)
+    {
+
+      //draw the new node in red at the clicked place
+    case GDK_BUTTON_PRESS:
+      isbutton=1;
+
+      active_node=NodeIt(g,g.addNode());
+
+      //initiating values corresponding to new node in maps
+      
+
+      window_to_world (e->button.x, e->button.y, clicked_x, clicked_y);
+
+      nodesmap[active_node]=new Gnome::Canvas::Ellipse(displayed_graph, clicked_x-20, clicked_y-20, clicked_x+20, clicked_y+20);
+      active_item=(Gnome::Canvas::Item *)(nodesmap[active_node]);
+      *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
+      *(nodesmap[active_node]) << Gnome::Canvas::Properties::outline_color("black");
+      (nodesmap[active_node])->show();
+      break;
+
+      //move the new node
+    case GDK_MOTION_NOTIFY:
+      {
+	double world_motion_x, world_motion_y;
+	GdkEvent * generated=new GdkEvent();
+	window_to_world (e->motion.x, e->motion.y, world_motion_x, world_motion_y);
+	generated->motion.x=world_motion_x;
+	generated->motion.y=world_motion_y;
+	generated->type=GDK_MOTION_NOTIFY;
+	move_event_handler(generated);      
+	break;
+      }
+
+      //finalize the new node
+    case GDK_BUTTON_RELEASE:
+      isbutton=0;
+      *active_item << Gnome::Canvas::Properties::fill_color("blue");
+      active_item=NULL;
+      active_node=INVALID;
+      updateScrollRegion();
+      break;
+    default:
+      break;
+    }
+  return false;
+}
+
+bool GraphDisplayerCanvas::create_edge_event_handler(GdkEvent* e)
+{
+  switch(e->type)
+    {
+    case GDK_BUTTON_PRESS:
+      //in edge creation right button has special meaning
+      if(e->button.button!=3)
+	{
+	  //there is not yet selected node
+	  if(active_node==INVALID)
+	    {
+	      //we mark the location of the event to be able to calculate parameters of dragging
+	      clicked_x=e->button.x;
+	      clicked_y=e->button.y;
+	      active_item=(get_item_at(e->button.x, e->button.y));
+	      active_node=INVALID;
+	      for (NodeIt i(g); i!=INVALID; ++i)
+		{
+		  if(nodesmap[i]==active_item)
+		    {
+		      active_node=i;
+		    }
+		}
+	      //the clicked item is really a node
+	      if(active_node!=INVALID)
+		{
+		  *(nodesmap[active_node]) << Gnome::Canvas::Properties::fill_color("red");
+		  isbutton=1;
+		}
+	      //clicked item was not a node. It could be e.g. edge.
+	      else
+		{
+		  active_item=NULL;
+		}
+	    }
+	  //we only have to do sg. if the mouse button
+	  // is pressed already once AND the click was
+	  // on a node that was found in the set of 
+	  //nodes, and now we only search for the second 
+	  //node
+	  else
+	    {
+	      target_item=(get_item_at(e->button.x, e->button.y));
+	      Graph::NodeIt target_node=INVALID;
+	      for (NodeIt i(g); i!=INVALID; ++i)
+		{
+		  if(nodesmap[i]==target_item)
+		    {
+		      target_node=i;
+		    }
+		}
+	      //the clicked item is a node, the edge can be drawn
+	      if(target_node!=INVALID)
+		{
+		  *(nodesmap[target_node]) << Gnome::Canvas::Properties::fill_color("red");
+
+		  //creating new edge
+		  active_edge=EdgeIt(g,g.addEdge(active_node, target_node));
+
+		  //initiating values corresponding to new edge in maps
+		  mapstorage.init_maps_for_edge(active_edge);
+	  
+		  //calculating coordinates of new edge
+		  Gnome::Canvas::Points coos;
+		  double x1, x2, y1, y2;
+	  
+		  active_item->get_bounds(x1, y1, x2, y2);
+		  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+		  target_item->get_bounds(x1, y1, x2, y2);
+		  coos.push_back(Gnome::Art::Point((x1+x2)/2,(y1+y2)/2));
+
+		  //drawing new edge
+		  edgesmap[active_edge]=new BrokenEdge(displayed_graph, coos, *this);
+		  *(edgesmap[active_edge]) << Gnome::Canvas::Properties::fill_color("green");
+		  edgesmap[active_edge]->property_width_pixels().set_value(10);
+
+		  //redraw nodes to blank terminations of the new edge
+		  target_item->raise_to_top();
+		  active_item->raise_to_top();
+
+		  //initializing edge-text as well, to empty string
+		  xy<double> text_pos=edgesmap[active_edge]->get_arrow_pos();
+		  text_pos+=(xy<double>(10,10));
+
+		  edgetextmap[active_edge]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");
+		  edgetextmap[active_edge]->property_fill_color().set_value("black");
+		}
+	      //clicked item was not a node. it could be an e.g. edge. we do not deal with it furthermore.
+	      else
+		{
+		  target_item=NULL;
+		}
+	    }
+	}
+      break;
+    case GDK_BUTTON_RELEASE:
+      isbutton=0;
+      //we clear settings in two cases
+      //1: the edge is ready (target_item has valid value)
+      //2: the edge creation is cancelled with right button
+      if((target_item)||(e->button.button==3))
+	{
+	  if(active_item)
+	    {
+	      *active_item << Gnome::Canvas::Properties::fill_color("blue");
+	      active_item=NULL;
+	    }
+	  if(target_item)
+	    {
+	      *target_item << Gnome::Canvas::Properties::fill_color("blue");
+	      target_item=NULL;
+	    }
+	  active_node=INVALID;
+	  active_edge=INVALID;
+	}
+      break;
+    default:
+      break;
+    }
+  return false;
+}
+
+bool GraphDisplayerCanvas::eraser_event_handler(GdkEvent* e)
+{
+  switch(e->type)
+    {
+    case GDK_BUTTON_PRESS:
+      active_item=(get_item_at(e->button.x, e->button.y));
+      active_node=INVALID;
+      active_edge=INVALID;
+      for (NodeIt i(g); i!=INVALID; ++i)
+	{
+	  if(nodesmap[i]==active_item)
+	    {
+	      active_node=i;
+	    }
+	}
+      if(active_node==INVALID)
+	{
+	  for (EdgeIt i(g); i!=INVALID; ++i)
+	    {
+	      if(edgesmap[i]==active_item)
+		{
+		  active_edge=i;
+		}
+	    }
+	}
+    *active_item << Gnome::Canvas::Properties::fill_color("red");
+      break;
+
+    case GDK_BUTTON_RELEASE:
+      if(active_item==(get_item_at(e->button.x, e->button.y)))
+	{
+	  if(active_node!=INVALID)
+	    {
+
+	      //collecting edges to delete
+	      EdgeIt e;
+	      std::set<Graph::Edge> edges_to_delete;
+
+	      g.firstOut(e,active_node);
+	      for(;e!=INVALID;g.nextOut(e))
+		{
+		      edges_to_delete.insert(e);
+		}
+
+	      g.firstIn(e,active_node);
+	      for(;e!=INVALID;g.nextIn(e))
+		{
+		      edges_to_delete.insert(e);
+		}
+
+	      //deleting collected edges
+	      for(std::set<Graph::Edge>::iterator edge_set_it=edges_to_delete.begin();edge_set_it!=edges_to_delete.end();edge_set_it++)
+		{
+		  delete_item(*edge_set_it);
+		}
+	      delete_item(active_node);
+	    }
+	  //a simple edge was chosen
+	  else
+	    {
+	      delete_item(active_edge);
+	    }
+
+	  
+	}
+      //pointer was moved, deletion is cancelled
+      else
+	{
+	  if(active_node!=INVALID)
+	    {
+	      *active_item << Gnome::Canvas::Properties::fill_color("blue");
+	    }
+	  else
+	    {
+	      *active_item << Gnome::Canvas::Properties::fill_color("green");
+	    }
+	}
+      //reseting datas
+      active_item=NULL;
+      active_edge=INVALID;
+      active_node=INVALID;
+      break;
+
+    case GDK_MOTION_NOTIFY:
+      break;
+
+    default:
+      break;
+    }
+  return true;
+}
+
+void GraphDisplayerCanvas::delete_item(NodeIt node_to_delete)
+{
+  delete(nodesmap[node_to_delete]);
+  g.erase(node_to_delete);
+}
+
+void GraphDisplayerCanvas::delete_item(EdgeIt edge_to_delete)
+{
+  delete(edgesmap[edge_to_delete]);
+  g.erase(edge_to_delete);
+}
+
+void GraphDisplayerCanvas::delete_item(Graph::Edge edge_to_delete)
+{
+  delete(edgesmap[edge_to_delete]);
+  g.erase(edge_to_delete);
+}
+
+void GraphDisplayerCanvas::text_reposition(xy<double> new_place)
+{
+  new_place+=(xy<double>(10,10));
+  edgetextmap[active_edge]->property_x().set_value(new_place.x);
+  edgetextmap[active_edge]->property_y().set_value(new_place.y);
+}
+
+void GraphDisplayerCanvas::toggle_edge_activity(BrokenEdge* active_bre, bool on)
+{
+  if(on)
+    {
+      if(active_edge!=INVALID)
+	{
+	  std::cout << "ERROR!!!! Valid edge found!" << std::endl;
+	}
+      else
+	{
+	  for (EdgeIt i(g); i!=INVALID; ++i)
+	    {
+	      if(edgesmap[i]==active_bre)
+		{
+		  active_edge=i;
+		}
+	    }
+	}
+    }
+  else
+    {
+      if(active_edge!=INVALID)
+	{
+	  active_edge=INVALID;
+	}
+      else
+	{
+	  std::cout << "ERROR!!!! Invalid edge found!" << std::endl;
+	}
+    }
+
+}