Using g_signal_connect in class

[Marco Rocco <mr85mr gmail com>]

Thanks, I have done, but i have the problem of how i get treepath, and 
how i can pass to callback functions,
look my class:

class GtkCtree{
  private:
      GtkWidget *treeview;
      GtkListStore *liststore;
      Tdata string_to_data(const char *data_string);
      static void cell_edited_cbk(GtkWidget treeview, GtkCtree *data){
          data->cell_edited();
      }
      void cell_edited(GtkCellRendererText *cell, const gchar 
*path_string, const gchar *new_text,
                                      gpointer data){
          /* get column */
          guint column_number= 
GPOINTER_TO_UINT(g_object_get_data(G_OBJECT(cell), "my_column_num"));
                    /* get row */
          GtkTreePath *path = gtk_tree_path_new_from_string(path_string);
                    /* update model */
          GtkTreeIter iter;
          gtk_tree_model_get_iter(GTK_TREE_MODEL(liststore), &iter, path);
          gchar *old_text;
          gtk_tree_model_get(GTK_TREE_MODEL(liststore), &iter, 
column_number,
                                &old_text, -1);
          gtk_list_store_set(GTK_LIST_STORE(liststore), &iter, 
column_number, new_text, -1);
          g_free(old_text);
      }
        public:
      GtkCtree();
      GtkWidget *get_widget();
      void set(GladeXML *xml_file_glade, const char *nome_treeview, int 
ncolonne, ...);
      void inserisci_colonna(const char *titolo_colonna, const char 
*tipo_dato_gtk, int ncolonna);
      void inserisci_riga(int ncolonne, ...);
      int get_ID_selezionato();
      Tdata get_data_selezionata();
      void clear();
      void inserisci_colonna_editable(const char *titolo_colonna, const 
char *tipo_dato_gtk,
              int ncolonna);
};


void GtkCtree::inserisci_colonna_editable(const char *titolo_colonna, 
const char *tipo_dato_gtk,
                                  int ncolonna){
  GtkCellRenderer *renderer;
  GtkTreeViewColumn  *colonna;
  gtk_tree_view_set_model(GTK_TREE_VIEW(treeview), 
GTK_TREE_MODEL(liststore));
  renderer= gtk_cell_renderer_text_new();
  colonna= gtk_tree_view_column_new_with_attributes(titolo_colonna, 
renderer,
                                                              
tipo_dato_gtk, ncolonna,
                                                              NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), colonna);
    g_object_set_data(G_OBJECT(renderer), "my_column_num", 
GUINT_TO_POINTER(1));
  g_object_set(renderer, "editable", TRUE, NULL); //setta il testo 
editabile
    g_signal_connect(renderer, "edited", (GCallback) cell_edited_cbk, 
liststore);
}


void GtkClist::set(GladeXML *xml_file_glade, const char *nome_treeview, 
int ncolonne, ...){
  treeview= glade_xml_get_widget(xml_file_glade, nome_treeview);
  va_list arg_pt;
  va_start(arg_pt, ncolonne);
  GType *array;
  array= new GType[ncolonne];
  for (int i=0; i<ncolonne; i++)
      array[i]= va_arg(arg_pt, GType);
  liststore = gtk_list_store_newv(ncolonne, array);
  va_end(arg_pt);
}

void GtkClist::inserisci_riga(int ncolonne, ...){
  va_list args;
  va_start(args, ncolonne);
  GtkTreeIter newrow;
  gtk_list_store_append(GTK_LIST_STORE(liststore), &newrow);
  gtk_list_store_set_valist(GTK_LIST_STORE(liststore), &newrow, args);
  va_end(args);
}