Adding Simple Functions to GraphWin

    void gw.add_simple_call
              (void (*func)(GraphWin&), string label, int menu_id=0);

adds a new button with label label to the menu with menu id menu_id. Whenever this button is pressed in edit mode func(gw) is called.

Example:

    void dfs(graph& G, node s, 
             node_array<bool> reached);

On the right there is a screenshot of the program. Clicking on the picture shows the window in original size.

#include <LEDA/graphics/graphwin.h>
#include <LEDA/graph/graph.h>
#include <LEDA/graph/node_array.h>
#include <LEDA/graph/graph_alg.h>

using namespace leda;

void run_dfs(GraphWin& gw)
{
  //provide arguments
  graph& G=gw.get_graph();
  node s=gw.ask_node();
  node_array<bool> reached(G,false);

  DFS(G,s,reached); //call function

  //display result
  node v; forall_nodes(v,G) 
    if (reached[v]) gw.set_color(v,red);
}


int main()
{
  GraphWin gw;

  gw.add_simple_call(run_dfs,"DFS");

  gw.display(); gw.edit();
  gw.get_window().screenshot("gw_simple_functions");

  return 0;
}