#include <graph_displayer_canvas.h>

 #include <broken_edge.h>

 #include <math.h>

 GraphDisplayerCanvas::GraphDisplayerCanvas(Graph & gr, CoordinatesMap & cm, MapStorage & ms, MapWin * mw):g(gr),nodesmap(g),edgesmap(g),edgetextmap(g),nodetextmap(g),displayed_graph(*(root()), 0, 0),canvasentrywidget(NULL),mapstorage(ms),isbutton(0),active_item(NULL),target_item(NULL),nodemap_to_edit(""),edgemap_to_edit(""),mapwin(mw)

 {

   //Initializing values.

   active_node=INVALID;

   active_edge=INVALID;

   forming_edge=INVALID;

   //setting event handler for the editor widget

   entrywidget.signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::entryWidgetChangeHandler), false);

   //base event handler is move tool

   actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);

   actual_tool=MOVE;

   //set_center_scroll_region(true);

   //first edges are drawn, to hide joining with nodes later

   for (EdgeIt i(g); i!=INVALID; ++i)

   {

     //drawing green lines, coordinates are from cm

     Gnome::Canvas::Points coos;

     coos.push_back(Gnome::Art::Point(cm[g.source(i)].x,cm[g.source(i)].y));

     coos.push_back(Gnome::Art::Point(cm[g.target(i)].x,cm[g.target(i)].y));

     edgesmap[i]=new BrokenEdge(displayed_graph, coos, *this);

     *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");

     edgesmap[i]->property_width_pixels().set_value(10);    

     //initializing edge-text as well, to empty string

     xy<double> text_pos=edgesmap[i]->getArrowPos();

     text_pos+=(xy<double>(10,10));

     edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");

     edgetextmap[i]->property_fill_color().set_value("darkgreen");

   }

   //afterwards nodes come to be drawn

   NodeIt i(g);

   int maxx=0, maxy=0, minx=(int)cm[i].x, miny=(int)cm[i].y;

   for (; i!=INVALID; ++i)

   {

     //minimum and maximum is gathered to be able to zoom to the graph correctly (whole figure should be seen)

     if(cm[i].x>maxx)maxx=(int)cm[i].x;

     if(cm[i].y>maxy)maxy=(int)cm[i].y;

     if(cm[i].x<minx)minx=(int)cm[i].x;

     if(cm[i].y<miny)miny=(int)cm[i].y;

     //drawing bule nodes, with black line around them

     nodesmap[i]=new Gnome::Canvas::Ellipse(displayed_graph, cm[i].x-20, cm[i].y-20, cm[i].x+20, cm[i].y+20);

     *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");

     *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black");

     //initializing edge-text as well, to empty string

     xy<double> text_pos((cm[i].x+node_property_defaults[N_RADIUS]+5),(cm[i].y+node_property_defaults[N_RADIUS]+5));

     nodetextmap[i]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");

     nodetextmap[i]->property_fill_color().set_value("darkblue");

   }

   updateScrollRegion();

 }

 GraphDisplayerCanvas::~GraphDisplayerCanvas()

 {

   if(canvasentrywidget)

     {

       delete(canvasentrywidget);

     }

   //writing out the end state of the graph

   //\todo all the maps has to be write out!

   Graph::NodeMap <int> id(g);

   Graph::NodeMap <double> xc(g);

   Graph::NodeMap <double> yc(g);

   int j=1;

   for (NodeIt i(g); i!=INVALID; ++i)

   {

     double x1,y1,x2,y2;

     nodesmap[i]->get_bounds(x1, y1, x2, y2);

     id[i]=j++;

     xc[i]=(x1+x2)/2;

     yc[i]=(y1+y2)/2;

   }

   GraphWriter<Graph> writer(std::cout,g);

   writer.writeNodeMap("id", id);

   writer.writeNodeMap("coordinates_x", xc);

   writer.writeNodeMap("coordinates_y", yc);

   writer.run();

 }