Changing the popdown strings of a combo

[Cosmin Bonea <cosminb saguaro ro>]

Hi all,

I have a problem when I change the popdown strings of a combo. 
The popdown strings is changed everytime an option is selected.
After I change it, if I use the mouse to select other option everything's OK,
but if I use the up and down keys to parse the drop down list some warning
message appears, and after a few times a segmentation fault occurs.
The message is:
 "Gtk-CRITICAL **: file gtkcontainer.c: line 1209
(gtk_container_set_focus_child): assertion `GTK_IS_WIDGET (widget)' failed. "


Could someone tell what's wrong in my code.

Thank you.


Here is the code:



#include <gtk/gtk.h>

/* pointer to the combo widget */
void *combo = NULL;



void FillCombo()
{
  GList *combo1_items = NULL;
  gchar *option       = NULL;
 
  /* get the current option */
  option=gtk_editable_get_chars(GTK_EDITABLE (GTK_COMBO (combo)->entry), 0 , -1);

  
  combo1_items = g_list_append (combo1_items, "item1");
  combo1_items = g_list_append (combo1_items, "item2");
  combo1_items = g_list_append (combo1_items, "item3");
  combo1_items = g_list_append (combo1_items, "item4");
  combo1_items = g_list_append (combo1_items, "item5");
  combo1_items = g_list_append (combo1_items, "item6");
  combo1_items = g_list_append (combo1_items, "item7");
  combo1_items = g_list_append (combo1_items, "item8");
  combo1_items = g_list_append (combo1_items, "item9");

  gtk_combo_set_popdown_strings (GTK_COMBO (combo), combo1_items);
  
 
  if (combo1_items)
  {
    g_list_free(combo1_items);
    combo1_items=NULL;
  }

  /* set back the current option */
  gtk_entry_set_text (GTK_ENTRY (GTK_COMBO (combo)->entry), option);


  if (option)
  {
    g_free(option);
    option=NULL;
  }


  return;
  
}




void G_ComboBoxOptionChanged()
{

  FillCombo();
  
  return;
}






int main (int argc, char*argv[])
{
  GtkWidget *window1;
  GtkWidget *hbox1;
  GtkWidget *label1;
  GtkWidget *combo1;
  GtkWidget *combo_entry1;
  

  gtk_init(&argc, &argv);

  /* create all the widgets */

  window1 = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_object_set_data (GTK_OBJECT (window1), "window1", window1);
  gtk_window_set_title (GTK_WINDOW (window1), "window1");
  gtk_widget_show (window1);

  hbox1 = gtk_hbox_new (FALSE, 0);
  gtk_widget_ref (hbox1);
  gtk_object_set_data_full (GTK_OBJECT (window1), "hbox1", hbox1,
                            (GtkDestroyNotify) gtk_widget_unref);
  gtk_widget_show (hbox1);
  gtk_container_add (GTK_CONTAINER (window1), hbox1);



  label1 = gtk_label_new ("Comb box :  ");
  gtk_widget_ref (label1);
  gtk_object_set_data_full (GTK_OBJECT (window1), "label1", label1,
                            (GtkDestroyNotify) gtk_widget_unref);
  gtk_widget_show (label1);
  gtk_box_pack_start (GTK_BOX (hbox1), label1, FALSE, FALSE, 0);


  combo1 = gtk_combo_new ();
  gtk_widget_ref (combo1);
  gtk_object_set_data_full (GTK_OBJECT (window1), "combo1", combo1,
                            (GtkDestroyNotify) gtk_widget_unref);
  gtk_widget_show (combo1);
  gtk_box_pack_start (GTK_BOX (hbox1), combo1, FALSE, FALSE, 0);
  gtk_combo_set_use_arrows (GTK_COMBO (combo1), FALSE);
  gtk_combo_set_value_in_list (GTK_COMBO (combo1), TRUE, FALSE);

                                           
  /* set the pointer to combo1 */
  combo=combo1;


  /* connect the "hide" signal of the popwin of the combo box */
  gtk_signal_connect_object_after(GTK_OBJECT (GTK_COMBO (combo1)->popwin), "hide", GTK_SIGNAL_FUNC (G_ComboBoxOptionChanged), NULL); 
  


  combo_entry1 = GTK_COMBO (combo1)->entry;
  gtk_widget_ref (combo_entry1);
  gtk_object_set_data_full (GTK_OBJECT (window1), "combo_entry1", combo_entry1,
                            (GtkDestroyNotify) gtk_widget_unref);
  gtk_widget_show (combo_entry1);
  gtk_entry_set_editable (GTK_ENTRY (combo_entry1), FALSE);



  /* fill the combo with the options */
  FillCombo();


  /* set default option */
  gtk_entry_set_text (GTK_ENTRY (combo_entry1), "item5");

  
  gtk_main();

  return 1;
}