source: lemon-0.x/gui/graph_displayer_canvas.cc @ 1604:4d037c2b66aa

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

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

  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();
}