/**
* Displays the input control for when the student should upload a single file.
* @param question_attempt $qa the question attempt to display.
* @param int $numallowed the maximum number of attachments allowed. -1 = unlimited.
* @param question_display_options $options controls what should and should
* not be displayed. Used to get the context.
*/
public function files_input(question_attempt $qa, $numallowed, question_display_options $options)
{
global $CFG;
require_once $CFG->dirroot . '/lib/form/filemanager.php';
$pickeroptions = new stdClass();
$pickeroptions->mainfile = null;
$pickeroptions->maxfiles = $numallowed;
$pickeroptions->itemid = $qa->prepare_response_files_draft_itemid('attachments', $options->context->id);
$pickeroptions->context = $options->context;
$pickeroptions->itemid = $qa->prepare_response_files_draft_itemid('attachments', $options->context->id);
return form_filemanager_render($pickeroptions) . html_writer::empty_tag('input', array('type' => 'hidden', 'name' => $qa->get_qt_field_name('attachments'), 'value' => $pickeroptions->itemid));
}
