gtk_tree_model_filter_set_modify_func()

[Russell Shaw <rjshaw netspace net au>]

Hi,
In the following code, i can only get printed:  n:0 val:(null)
I should get:  n:0 val:abc

If i comment out the gtk_tree_model_filter_set_modify_func(), then
it works. Gtk 2.4.3


#include <stdlib.h>
#include <stdio.h>
#include <gtk/gtk.h>
#include <gtk/gtksignal.h>
#include "xmalloc.h"
#include <string.h>

static
gboolean delete( GtkWidget *widget, GtkWidget *event, gpointer data)
{
    gtk_main_quit ();
}

void filtermodifyfunc(GtkTreeModel *model, GtkTreeIter *iter, GValue *value, 
gint column, gpointer data)
{
    return;
}

gint main(gint argc, gchar *argv[])
{
    gtk_init (&argc, &argv);

    GtkWidget *window=gtk_window_new(GTK_WINDOW_TOPLEVEL);

    g_signal_connect(G_OBJECT(window),"delete_event",G_CALLBACK(delete),NULL);

    GtkListStore *store=gtk_list_store_new(2,G_TYPE_UINT,G_TYPE_STRING);

    GtkTreeIter iter;
    gtk_list_store_append(store,&iter);
    gtk_list_store_set(store,&iter,0,0,1,"abc",-1);
    gtk_list_store_append(store,&iter);
    gtk_list_store_set(store,&iter,0,1,1,"def",-1);
    gtk_list_store_append(store,&iter);
    gtk_list_store_set(store,&iter,0,2,1,"ghi",-1);

    GtkTreeModel *modelfilter=
                       gtk_tree_model_filter_new(GTK_TREE_MODEL(store),NULL);
    GType types[]={G_TYPE_UINT,G_TYPE_STRING};
    gtk_tree_model_filter_set_modify_func(
                        GTK_TREE_MODEL_FILTER(modelfilter),
                        2,
                        types,
                        filtermodifyfunc,
                        NULL,NULL);

    gtk_tree_model_get_iter_first(GTK_TREE_MODEL(modelfilter),&iter);

    guint n;
    gchar *str1;
    gtk_tree_model_get(GTK_TREE_MODEL(modelfilter),&iter,0,&n,1,&str1,-1);

    g_printf("n:%d val:%s\n",n,str1);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}