gchar * compute_title (int j)
{
  if(sp->im_widget_is_difference_mesh[j] ) {
    const gchar * R = _("differential mesh");
    gchar  *N;
    if(sp->im_mesh_filename[j] ) 
      N=g_strdup_printf("%s %d '%s'",R,j,sp->im_mesh_filename[j]);
    else
      N=g_strdup_printf("%s %d",R,j);
    return N;
  } else {
    const gchar * R = _("resulting image");
    gchar *I = R, *N;
    if(j != MAIN_WIN)
	/* warning: due to main.c:144 , this _("input image") will always
	   be translated using a UTF-8 locale, regardless of the real LANG setting */
      I = g_strdup_printf("%s %d",_("input image"),j);
    if(sp->im_filename_in[j] ) 
      N=g_strdup_printf("%s '%s'",I, sp->im_filename_in[j]);
    else
      N=g_strdup(I);
    if (I!=R) g_free(I);
    return N;
  }  
}




/*********************** 
			 some commonly used routines 
********************** 
*/



void set_sensitive(GtkWidget * widget, gboolean flag)
{
  if(flag) {
    gtk_widget_show(widget);  
    gtk_widget_set_sensitive(widget,flag);
  } else {
    if(settings_get_value("hide unusable"))
      {
      	gtk_widget_hide(widget);
      }
    else {
      gtk_widget_show(widget);  
      gtk_widget_set_sensitive(widget,flag);
    }
  }
}


void set_info_label(gchar *t)
{
  static GtkWidget *m=NULL;
  if(!m) m=lookup_widget(sp->im_widget[MAIN_WIN],"main_info_label");
  if(m) {
    gtk_label_set_text(m,t);
  } 
}







/* linking callbacks to optionmenu does not work...
  this comes from the glade FAQ */
void
on_optionmenu_editview__selected (GtkMenuShell *menu_shell,
                    gpointer data)
{
  GtkWidget *active_item;
  gint item_index;

  /* the following fails: the menu_shell has a different window
    int i=
    GPOINTER_TO_UINT(gtk_widget_get_data_top(GTK_WIDGET(data),
					     "imagenum")); 
  */
  int i=
    GPOINTER_TO_UINT(data);
  g_assert(i>0);

  active_item = gtk_menu_get_active (GTK_MENU (menu_shell));
  item_index = g_list_index (menu_shell->children, active_item);

  /* thanks GOD this works!!
    g_print ("In on_option_selected active: %i\n", item_index);*/
  sp->im_editview[i]=item_index;

  g_debug("on_optionmenu_editview__selected %d is now %d ",i,item_index);

  editview_callback(i);
#ifndef IS_PLYMORPH
  drawingarea_configure(i);
#endif
  MY_GTK_DRAW(sp->im_widget[i]);
}













/************************************


setup_handlebox_factors()

if there is only one image , then we may only warp it
so the handlebox is hidden

otherwise if in showmeshes mode, they are shown,
and the user may set the factors and warp the image

***********************************/
void
setup_handlebox_factor(int lp,int force)
{
#ifndef IS_PLYMORPH
  if(sp->im_widget_is_difference_mesh[lp]) return;
#endif
  GtkWidget* hb= lookup_widget  ( sp->im_widget[lp]  ,
				  "handlebox_factors");
  g_assert(hb);
  // these are really to be hidden!
  //set_sensitive(hb,( sp->max_wins>1 
  //		     && (sp->im_editview[lp] == EDITVIEW_SHOWMESHES  
			 // ||sp->im_editview[lp] == EDITVIEW_SHOW)
  //		     )));
  //return ;
  if(  sp->max_wins>1 && (force 
#ifndef IS_PLYMORPH
			  || sp->im_editview[lp] == EDITVIEW_SHOWMESHES
#endif
			  ))
    gtk_widget_show(hb);
  else
    gtk_widget_hide(hb);
}