public static function get_title()
{
$identifier = self::get_name();
return qtype_matrix::get_string($identifier);
}
public static function get_title()
{
return qtype_matrix::get_string(self::TYPE);
}
public function validation($data)
{
$multiple = $data['multiple'];
if (empty($multiple)) {
return array('multiple' => qtype_matrix::get_string('weightednomultiple'));
}
// each row must have a total weight of 100%
$rows_count = $this->row_count($data);
$cols_count = $this->col_count($data);
for ($row = 0; $row < $rows_count; $row++) {
$row_grade = 0;
for ($col = 0; $col < $cols_count; $col++) {
$cell_name = $this->cell_name($row, $col, $multiple);
$row_grade += (double) $data[$cell_name];
}
if (abs(abs($row_grade) - 1) > 0.0001) {
return array("matrix" => qtype_matrix::get_string('mustaddupto100'));
}
}
return array();
}
protected function add_submit($name, $label = '')
{
if ($label === '') {
$short_name = explode('[', $name);
$short_name = reset($short_name);
$label = qtype_matrix::get_string($short_name);
}
return $this->_form->addElement('submit', $name, $label);
}
protected function add_submit($name, $label = '')
{
if ($label === '') {
$label = qtype_matrix::get_string($name);
}
return $this->_form->addElement('submit', $name, $label);
}
/**
* In situations where is_gradable_response() returns false, this method
* should generate a description of what the problem is.
* @return string the message.
*/
public function get_validation_error(array $response)
{
$is_gradable = $this->is_gradable_response($response);
if ($is_gradable) {
return '';
}
return qtype_matrix::get_string('oneanswerperrow');
}
