/**
* Generate the display of the formulation part of the question. This is the
* area that contains the quetsion text, and the controls for students to
* input their answers. Some question types also embed bits of feedback, for
* example ticks and crosses, in this area.
*
* @param question_attempt $qa the question attempt to display.
* @param question_display_options $options controls what should and should not be displayed.
* @return string HTML fragment.
*/
public function formulation_and_controls(question_attempt $qa, question_display_options $options)
{
$question = $qa->get_question();
$response = $qa->get_last_qt_data();
$table = new html_table();
$table->attributes['class'] = 'matrix';
$table->head = array();
$table->head[] = '';
foreach ($question->cols as $col) {
$table->head[] = self::matrix_header($col);
}
if ($options->correctness) {
$table->head[] = '';
}
foreach ($question->rows as $row) {
$row_data = array();
$row_data[] = self::matrix_header($row);
foreach ($question->cols as $col) {
$key = $question->key($row, $col);
$cell_name = $qa->get_field_prefix() . $key;
$is_readonly = $options->readonly;
$is_checked = $question->is_answered($response, $row, $col);
if ($question->multiple) {
$cell = self::checkbox($cell_name, $is_checked, $is_readonly);
} else {
$cell = self::radio($cell_name, $col->id, $is_checked, $is_readonly);
}
if ($options->correctness) {
$weight = $question->weight($row, $col);
$cell .= $this->feedback_image($weight);
}
$row_data[] = $cell;
}
if ($options->correctness) {
$row_grade = $question->grading()->grade_row($question, $row, $response);
$feedback = $row->feedback;
$feedback = strip_tags($feedback) ? $feedback : '';
$row_data[] = $this->feedback_image($row_grade) . $feedback;
}
$table->data[] = $row_data;
//$row_index++;
}
$result = $question->questiontext;
$result .= html_writer::table($table, true);
return $result;
}