#include <LEDA/graphics/graphwin.h>
using namespace leda;

GRAPH<unsigned,char> G;

void new_node_handler(GraphWin& gw, node v)
{
  G[v] = 0;
  gw.redraw();
}

void new_edge_handler(GraphWin& gw, edge e)
{
  node s = G.source(e);
  node t = G.target(e);

  G[s]++;
  G[t]++;

  // gw.set_node_label_type(data_label);
  gw.redraw();
}

int main()
{
  GraphWin gw(G, "Kurs 2");

  gw.set_node_width(20);
  gw.set_node_label_type(data_label);
  gw.set_edge_direction(undirected_edge);

  gw.set_new_node_handler(new_node_handler);
  gw.set_new_edge_handler(new_edge_handler);

  gw.display();
  gw.edit();

  return 0;
}