#include "graph_displayer_canvas.h"

 #include <cmath>

 GraphDisplayerCanvas::GraphDisplayerCanvas(MapStorage & ms, MapWin & mw, Gtk::Window * mainwin) :

   nodesmap(ms.graph), edgesmap(ms.graph), edgetextmap(ms.graph),

   nodetextmap(ms.graph), displayed_graph(*(root()), 0, 0), mapstorage(ms),

   isbutton(0), active_item(NULL), target_item(NULL), nodemap_to_edit(""),

   edgemap_to_edit(""), mapwin(mw)

 {

   parentwin=mainwin;

   //base event handler is move tool

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

   actual_tool=MOVE;

   active_node=INVALID;

   active_edge=INVALID;

   forming_edge=INVALID;

 }

 GraphDisplayerCanvas::~GraphDisplayerCanvas()

 {

   for (NodeIt n(mapstorage.graph); n != INVALID; ++n)

   {

     delete nodesmap[n];

     delete nodetextmap[n];

   }

   for (EdgeIt e(mapstorage.graph); e != INVALID; ++e)

   {

     delete edgesmap[e];

     delete edgetextmap[e];

   }

 }

 void GraphDisplayerCanvas::drawGraph()

 {

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

   for (EdgeIt i(mapstorage.graph); i!=INVALID; ++i)

   {

     //drawing green lines, coordinates are from mapstorage.coords

     Gnome::Canvas::Points coos;

     coos.push_back(Gnome::Art::Point(

           mapstorage.coords[mapstorage.graph.source(i)].x,

           mapstorage.coords[mapstorage.graph.source(i)].y));

     coos.push_back(Gnome::Art::Point(

           mapstorage.coords[mapstorage.graph.target(i)].x,

           mapstorage.coords[mapstorage.graph.target(i)].y));

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

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

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

     edgesmap[i]->lower_to_bottom();

     //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");

     edgetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::edgeMapEditEventHandler), false);

     edgetextmap[i]->raise_to_top();

   }

   //afterwards nodes come to be drawn

   for (NodeIt i(mapstorage.graph); i!=INVALID; ++i)

   {

     //drawing bule nodes, with black line around them

     nodesmap[i]=new Gnome::Canvas::Ellipse(

         displayed_graph,

         mapstorage.coords[i].x-20,

         mapstorage.coords[i].y-20,

         mapstorage.coords[i].x+20,

         mapstorage.coords[i].y+20);

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

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

     nodesmap[i]->raise_to_top();

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

     xy<double> text_pos(

         (mapstorage.coords[i].x+node_property_defaults[N_RADIUS]+5),

         (mapstorage.coords[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");

     nodetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::nodeMapEditEventHandler), false);

     nodetextmap[i]->raise_to_top();

   }

   updateScrollRegion();

 }

 void GraphDisplayerCanvas::clear()

 {

   active_node=INVALID;

   active_edge=INVALID;

   forming_edge=INVALID;

   for (NodeIt n(mapstorage.graph); n != INVALID; ++n)

   {

     delete nodesmap[n];

     delete nodetextmap[n];

   }

   for (EdgeIt e(mapstorage.graph); e != INVALID; ++e)

   {

     delete edgesmap[e];

     delete edgetextmap[e];

   }

 }