source: glemon-0.x/dijkstrabox.cc @ 197:c1084e2bff10

/* -*- C++ -*-
 *
 * This file is a part of LEMON, a generic C++ optimization library
 *
 * Copyright (C) 2003-2006
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 * Permission to use, modify and distribute this software is granted
 * provided that this copyright notice appears in all copies. For
 * precise terms see the accompanying LICENSE file.
 *
 * This software is provided "AS IS" with no warranty of any kind,
 * express or implied, and with no claim as to its suitability for any
 * purpose.
 *
 */

#include <mapstorage.h>
#include <mapselector.h>
#include <algobox.h>
#include <dijkstrabox.h>

#include <lemon/dijkstra.h>
#include <lemon/suurballe.h>
#include <lemon/path.h>

enum {INPUT, OUTPUT, MAP_NUM};

DijkstraBox::DijkstraBox(std::vector<std::string> t):AlgoBox()
{
  init(t);
}
    
SuurballeBox::SuurballeBox(std::vector<std::string> t):DijkstraBox(t)
{
  Gtk::Adjustment * adjustment=new Gtk::Adjustment(2, 1, 20, 1, 5);
  num_set = new Gtk::SpinButton(*adjustment, 5,0);

  Gtk::Label * label=new Gtk::Label("No. of paths to find: ");
//   hbox.pack_start(*label);
//   hbox.pack_start(*num_set);
//   hbox.show_all_children();

  table.attach(*label, 0,1,2,3);
  table.attach(*num_set, 1,2,2,3);


//   pack_start(hbox);
}
    
void DijkstraBox::run()
{
  if(
     tabcbt.get_active_text()!="" &&
     (edgemapcbts[INPUT])->get_active_text()!="" &&
     (edgemapcbts[OUTPUT])->get_active_text()!="" &&
     source.get_active_text()!="" &&
     target.get_active_text()!=""
     )
    {
      const Graph &g=mapstorage->graph;
      Node from, to;

      get_from_to(from, to, (Graph&)g);

      std::ostringstream o;

      if(!(from==to))
        {
          Graph::EdgeMap<double> * inputmap=
            (mapstorage->edgemap_storage)[(edgemapcbts[INPUT])->get_active_text()];
          Graph::EdgeMap<double> * outputmap=
            (mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->get_active_text()];

          //zero out output map
          for (EdgeIt i(g); i!=INVALID; ++i)
            {
              (*outputmap)[i]=0;
            }
          
          Dijkstra<Graph, Graph::EdgeMap<double> > dijkstra(g, *inputmap);
          dijkstra.run(from, to);
          
          if(dijkstra.reached(to))
            {
              Node n=to;
              int length=0;
              while (n!=INVALID && n!=from)
                {
                  Edge e=dijkstra.predEdge(n);
                  (*outputmap)[e]=1;
                  n=dijkstra.predNode(n);
                  length++;
                }
              o << "Result: " << length << " long path, with cost " << dijkstra.dist(to);
            }
          else
            {
              o << "Result: failed to find shortest path between ";
              o << source.get_active_text() << " and " << target.get_active_text();
            }
          resultlabel.set_text(o.str());
          
          mapstorage->mapChanged(true, (edgemapcbts[OUTPUT])->get_active_text());
          //   mapstorage->changeActiveMap(true, E_COLOR,
          //                          (edgemapcbts[OUTPUT])->get_active_text());
          //   mapstorage->changeActiveMap(true, E_TEXT,
          //                          (edgemapcbts[INPUT])->get_active_text());
        }
    }
}

void SuurballeBox::run()
{
  if(
     tabcbt.get_active_text()!="" &&
     (edgemapcbts[INPUT])->get_active_text()!="" &&
     (edgemapcbts[OUTPUT])->get_active_text()!="" &&
     source.get_active_text()!="" &&
     target.get_active_text()!=""
     )
    {
      const Graph &g=mapstorage->graph;
      Node from, to;

      get_from_to(from, to, (Graph&)g);

      std::ostringstream o;

      if(!(from==to))
        {
          Graph::EdgeMap<double> * inputmap=
            (mapstorage->edgemap_storage)[(edgemapcbts[INPUT])->get_active_text()];
          Graph::EdgeMap<double> * outputmap=
            (mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->get_active_text()];

          //zero out output map
          for (EdgeIt i(g); i!=INVALID; ++i)
            {
              (*outputmap)[i]=0;
            }
          
          Suurballe<Graph, Graph::EdgeMap<double> > sb((Graph&)g, *inputmap, from, to);
          
          int found=sb.run(num_set->get_value_as_int());
          if(found)
            {
              for(int j=0;j<found;j++)
                {
                  Path<Graph> path;
                  path=sb.path(j);
                  for(int k=0;k<path.length();k++)
                    {
                      (*outputmap)[path.nth(k)]=j+1;
                    }
                }
              o << "Result: found " << found << " paths between ";
              o << source.get_active_text() << " and " << target.get_active_text();
            }
          else
            {
              o << "Result: failed to find shortest path between ";
              o << source.get_active_text() << " and " << target.get_active_text();
            }
          resultlabel.set_text(o.str());
          
          mapstorage->mapChanged(true, (edgemapcbts[OUTPUT])->get_active_text());
          //   mapstorage->changeActiveMap(true, E_COLOR,
          //                          (edgemapcbts[OUTPUT])->get_active_text());
          //   mapstorage->changeActiveMap(true, E_TEXT,
          //                          (edgemapcbts[INPUT])->get_active_text());
        }
    }
}
    
void DijkstraBox::build_box()
{
  //if active tab is changed, labels of graph nodes had to be loaded into comboboxes
  //this can be done after the maps are loaded into ComboBoxes
  signal_upon_maplist_updated().connect(sigc::mem_fun(*this, &DijkstraBox::maplists_updated));

  addMapSelector("Cost map: ", true);
  addMapSelector("Edges of path here: ", true);

  Gtk::Label * source_label=new Gtk::Label("Source: ");
  Gtk::Label * target_label=new Gtk::Label("Target: ");

  table.attach(*source_label, 0,1,0,1);
  table.attach(*target_label, 0,1,1,2);
  table.attach(source, 1,2,0,1);
  table.attach(target, 1,2,1,2);


  pack_start(table);

  resultlabel.set_text("Result: algorithm is not run yet.");
  pack_start(resultlabel);
}

void SuurballeBox::build_box()
{
}

void DijkstraBox::maplists_updated()
{
  if(tabcbt.get_active_text()!="")
    {
      source.clear();
      target.clear();
      const Graph &g=mapstorage->graph;
      for (NodeIt i(g); i!=INVALID; ++i)
        {
          std::ostringstream text;
          text << (*((mapstorage->nodemap_storage)["label"]))[i];
          source.prepend_text(text.str());
          target.prepend_text(text.str());
        }
    }
}

void DijkstraBox::get_from_to(Node & from, Node & to, Graph & g)
{
  int assigned=0;
  for (NodeIt i(g); (i!=INVALID) && (assigned<2); ++i)
    {
      std::ostringstream text;
      text << (*((mapstorage->nodemap_storage)["label"]))[i];
      if(!(text.str().compare(source.get_active_text())))
        {
          from=i;
          assigned++;
        }
      if(!(text.str().compare(target.get_active_text())))
        {
          to=i;
          assigned++;
        }
    }
}