#include <stdio.h>
#include <sys/time.h>
#include <gtk/gtk.h>

static int timediff( struct timeval *large, struct timeval *small )
{
    return (   ( ( large->tv_sec * 1000 * 1000 ) + large->tv_usec )
             - ( ( small->tv_sec * 1000 * 1000 ) + small->tv_usec ) );
}

static void foreach_func (GtkTreeModel *model, GtkTreePath *path,
                          GtkTreeIter *iter, gpointer data)
{
}

static void tree_selection_changed_cb (GtkTreeSelection *selection,
                                       gpointer data)
{
    GtkWidget *tree = (GtkWidget *) data;
    struct timeval before, after;
    gettimeofday (&before, 0);
    gtk_tree_selection_get_selected_rows (selection, 0);
    gettimeofday (&after, 0);
    fprintf (stderr, "gtk_tree_selection_get_selected_rows: %d\n", timediff (&after, &before));
    gettimeofday (&before, 0);
    gtk_tree_selection_selected_foreach (selection, foreach_func, tree);
    gettimeofday (&after, 0);
    fprintf (stderr, "gtk_tree_selection_selected_foreach: %d\n", timediff (&after, &before));
}

int main (int argc, char **argv)
{
    GtkWidget *window, *tree, *scrolled, *vbox;
    GtkListStore *store;
    GtkCellRenderer *renderer;
    GtkTreeViewColumn *column;
    GtkTreeIter iter;
    GtkTreeSelection *select;
    int i;

    gtk_init (&argc, &argv);
    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    g_signal_connect (G_OBJECT (window), "destroy",
                      G_CALLBACK (gtk_main_quit), 0);
    g_signal_connect (G_OBJECT (window), "delete_event",
                      G_CALLBACK (gtk_main_quit), 0);

    vbox = gtk_vbox_new (FALSE, 0);
    scrolled = gtk_scrolled_window_new (0, 0);
    store = gtk_list_store_new (1, G_TYPE_STRING);
    tree = gtk_tree_view_new_with_model (GTK_TREE_MODEL (store));
    gtk_tree_view_set_headers_visible (GTK_TREE_VIEW (tree), FALSE);

    renderer = gtk_cell_renderer_text_new ();
    column = gtk_tree_view_column_new_with_attributes
               ("Column1", renderer, "text", 0, 0);
    gtk_tree_view_column_set_sizing (column, GTK_TREE_VIEW_COLUMN_FIXED);
    gtk_tree_view_column_set_min_width (column, 40);
    gtk_tree_view_append_column (GTK_TREE_VIEW (tree), column);
    g_object_set (tree, "fixed-height-mode", TRUE, NULL);

    gtk_container_add (GTK_CONTAINER (scrolled), tree);
    gtk_container_add (GTK_CONTAINER (vbox), scrolled);
    gtk_container_add (GTK_CONTAINER (window), vbox);

    for (i = 0; i < 100000; i++) {
        gtk_list_store_append (store, &iter);
        gtk_list_store_set (store, &iter, 0, "Item", -1);
    }

    gtk_widget_set_size_request (window, 800, 600);
    gtk_widget_show_all (window);

    select = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree));
    gtk_tree_selection_set_mode (select, GTK_SELECTION_MULTIPLE);
    g_signal_connect (G_OBJECT (select), "changed",
                      G_CALLBACK (tree_selection_changed_cb), tree);

    gtk_main ();

    return 0;
}