diff -r 7c2e71835de7 -r 0ace7edbb06f kruskalbox.cc
--- a/kruskalbox.cc	Fri Jan 06 14:44:04 2006 +0000
+++ b/kruskalbox.cc	Fri Jan 06 16:07:08 2006 +0000
@@ -9,62 +9,61 @@
     
 void KruskalBox::run()
 {
-  Graph g=mapstorage->graph;
-  Graph::EdgeMap<double> * inputmap=
-    ((mapstorage->edgemap_storage)[(edgemapcbts[INPUT])->get_active_text()]);
-  Graph::EdgeMap<bool> outputmap(g);
-  double res=kruskal(g, *inputmap, outputmap);
+  if(
+     tabcbt.get_active_text()!="" &&
+     (edgemapcbts[INPUT])->get_active_text()!="" &&
+     (edgemapcbts[OUTPUT])->get_active_text()!=""
+     )
+    {
 
-  for (EdgeIt i(g); i!=INVALID; ++i)
-  {
-    if(outputmap[i])
-      {
-	(*((mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->
-					 get_active_text()]))[i]=1;
-      }
-    else
-      {
-	(*((mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->
-					 get_active_text()]))[i]=0;
-      }
-  }
+      Graph g=mapstorage->graph;
+      Graph::EdgeMap<double> * inputmap=
+	((mapstorage->edgemap_storage)[(edgemapcbts[INPUT])->get_active_text()]);
+      Graph::EdgeMap<bool> outputmap(g);
+      double res=kruskal(g, *inputmap, outputmap);
 
-  std::ostringstream o;
-  o << "Result: " << res;
-  resultlabel.set_text(o.str());
+      for (EdgeIt i(g); i!=INVALID; ++i)
+	{
+	  if(outputmap[i])
+	    {
+	      (*((mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->
+					       get_active_text()]))[i]=1;
+	    }
+	  else
+	    {
+	      (*((mapstorage->edgemap_storage)[(edgemapcbts[OUTPUT])->
+					       get_active_text()]))[i]=0;
+	    }
+	}
 
-  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());
+      std::ostringstream o;
+      o << "Result: " << res;
+      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 KruskalBox::build_box()
 {
+  std::vector<std::string> empty_vector;
+
   edgemapcbts.resize(MAP_NUM);
-  Gtk::HBox * hbox;
 
-  hbox=new Gtk::HBox();
+  edgemapcbts[0]=new MapSelector(empty_vector,"","Edgecosts: ",true, false);
+  edgemapcbts[0]->signal_newmapwin_needed().connect(sigc::mem_fun(*this, &AlgoBox::emit_new_map_signal));
 
-  label=new Gtk::Label("Edgecosts: ");
+  pack_start(*(edgemapcbts[INPUT]));
 
-  edgemapcbts[0]=new Gtk::ComboBoxText();
+  edgemapcbts[1]=new MapSelector(empty_vector,"","Edges of tree here: ",true, false);
+  edgemapcbts[1]->signal_newmapwin_needed().connect(sigc::mem_fun(*this, &AlgoBox::emit_new_map_signal));
 
-  hbox->pack_start(*label);
-  hbox->pack_start(*(edgemapcbts[INPUT]));
-  pack_start(*hbox);
-
-  hbox=new Gtk::HBox();
-
-  label=new Gtk::Label("Edges of tree here: ");
-
-  edgemapcbts[1]=new Gtk::ComboBoxText();
-
-  hbox->pack_start(*label);
-  hbox->pack_start(*(edgemapcbts[OUTPUT]));
-  pack_start(*hbox);
+  pack_start(*(edgemapcbts[OUTPUT]));
 
   resultlabel.set_text("Result: algorithm is not run yet.");
   pack_start(resultlabel);