Elgg-Lorea-Hydra/mod/file_tools/views/default/widgets/file_tree/edit.php

<?php

$widget = elgg_extract("entity", $vars);

$folders = file_tools_get_folders($widget->owner_guid);
if (empty($folders)) {
	return;
}

$selected_folders = $widget->folder_guids;
if (!empty($selected_folders) && !is_array($selected_folders)) {
	$selected_folders = array($selected_folders);
} elseif (empty($selected_folders)) {
	$selected_folders = array();
}

// select folder(s) to display
echo elgg_echo("widgets:file_tree:edit:select");
echo "<div>";
echo elgg_view("input/hidden", array("name" => "params[folder_guids][]", "value" => "")); // needed to be able to empty the list
echo file_tools_build_widget_options($folders, "params[folder_guids][]", $selected_folders);
echo "</div>";

// display folder or folder content
$checkbox_options = array(
	"name" => "params[show_content]",
	"value" => "1"
);
if (!empty($widget->show_content)) {
	$checkbox_options["checked"] = "checked";
}
echo "<div>";
echo elgg_view("input/checkbox", $checkbox_options);
echo elgg_echo("widgets:file_tree:edit:show_content");
echo "</div>";