add: gtk_tree_selection_set_mode (gtk_tree_view_get_selection GTK_TREE_VIEW ((treeview)), GTK_SELECTION_MULTIPLE);
context: init_treeview (GtkWidget *treeview){	GtkTreeModel *model;	/* the model */	model = GTK_TREE_MODEL (gtk_list_store_new (NUM_COLS,				GDK_TYPE_PIXBUF,				G_TYPE_STRING,				G_TYPE_STRING));	/* the treeview */	gtk_tree_view_set_model (GTK_TREE_VIEW (treeview), model);	gtk_tree_view_set_rules_hint (GTK_TREE_VIEW (treeview), TRUE);	g_object_unref (G_OBJECT (model));	init_columns (GTK_TREE_VIEW (treeview));	//FIXME gtk_tree_selection_set_mode	gtk_widget_show (treeview);}