// Initializes tabs for the various pages. This should be done before
	// setting up the member callbacks.
	initialize_tabs(window);

	// Initializes initial values and sets up callbacks. This needs to be
	// done before selecting the initial page, otherwise widgets from other
	// pages cannot be found afterwards.
	initialize_members(window);

	assert(selector.get_item_count() == pager.get_layer_count());

	// Selects initial tab for each page and the initially displayed main
	// page. This should be done last after all initialization
	for(int i = 0; pager.get_layer_count(); ++i) {
		tstacked_widget* tab_pager = find_widget<tstacked_widget>(pager.get_page_grid(i), "tab_pager", false, false);

		if(tab_pager) {
			tab_pager->select_layer(i == index_.second ? index_.second : 0);
		}
	}

	selector.select_row(index_.first);
	pager.select_layer(index_.first);