#include "graph_displayer_canvas.h"

#include "broken_edge.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),

  canvasentrywidget(NULL), 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;

  //setting event handler for the editor widget

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

  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];

  }

  if(canvasentrywidget)

  {

    delete(canvasentrywidget);

  }

}

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];

  }

}