{

const DEFAULT_REPEAT_ELEMENTS = 1; //i.e. how many elements are added each time somebody click the add row/add column button.

const DEFAULT_ROWS = 4; //i.e. how many rows

const DEFAULT_COLS = 2; //i.e. how many cols

function qtype()

{

return 'matrix';

}

function definition_inner($mform)

{

$this->question->options = isset($this->question->options) ? $this->question->options : (object) array();

$this->add_multiple();

$this->add_grading();

}

/**

* Override if you need to setup the form depending on current values.

* This method is called after definition(), data submission and set_data().

* All form setup that is dependent on form values should go in here.

*/

function definition_after_data()

{

$this->add_matrix();

$this->add_javascript($this->get_javascript());

}

function set_data($question)

{

$is_new = empty($question->id) || empty($question->options->rows);

if (!$is_new)

{

$options = $question->options;

$question->multiple = $options->multiple ? '1' : '0';

$question->grademethod = $options->grademethod;

$question->rowshort = array();

$question->rowlong = array();

$question->rowfeedback = array();

$question->rowid = array();

foreach ($options->rows as $row)

{

$question->rowshort[] = $row->shorttext;

$question->rowlong[] = $row->description;

$question->rowfeedback[] = $row->feedback;

$question->rowid[] = $row->id;

}

$question->colshort = array();

$question->collong = array();

$question->colid = array();

foreach ($options->cols as $col)

{

$question->colshort[] = $col->shorttext;

$question->collong[] = $col->description;

$question->colid[] = $col->id;

}

//$question->matrix = array();

$row_index = 0;

foreach ($options->rows as $row)

{

$col_index = 0;

foreach ($options->cols as $col)

{

$cell_name = qtype_matrix_grading::cell_name($row_index, $col_index, $options->multiple);

$weight = $options->weights[$row->id][$col->id];

if ($options->multiple)

{

$value = ($weight > 0) ? 'on' : '';

$question->{$cell_name} = $value;

}

else

{

if ($weight > 0)

{

$question->{$cell_name} = $col_index;

break;

}

}

$col_index++;

}

$row_index++;

}

}

/* set data should be called on new questions to set up course id, etc

* after setting up values for question

*/

parent::set_data($question);

}

function validation($data, $files)

{

$errors = parent::validation($data, $files);

if ($this->col_count($data) == 0)

{

$errors['colshort[0]'] = qtype_matrix::get_string('mustdefine1by1');

}

if ($this->row_count($data) == 0)

{

$errors['rowshort[0]'] = qtype_matrix::get_string('mustdefine1by1');

}

$grading = qtype_matrix::grading($data['grademethod']);

$grading_errors = $grading->validation($data);

$errors = array_merge($errors, $grading_errors);

return $errors ? $errors : true;

}

protected function col_count($data)

{

foreach ($data['colshort'] as $index => $value)

{

if (empty($value))

{

return $index++;

}

}

return count($data['colshort']);

}

protected function row_count($data)

{

foreach ($data['rowshort'] as $index => $value)

{

if (empty($value))

{

return $index++;

}

}

return count($data['rowshort']);

}

//elements

public function add_multiple()

{

// multiple allowed

$this->add_selectyesno('multiple', qtype_matrix::get_string('multipleallowed'));

$this->set_default('multiple', true);

}

public function add_grading()

{

// grading method.

$options = array();

$default_grading = qtype_matrix::defaut_grading();

$options[$default_grading->get_name()] = $default_grading->get_title();

$gradings = qtype_matrix::gradings();

foreach ($gradings as $grading)

{

$options[$grading->get_name()] = $grading->get_title();

}

$this->add_select('grademethod', '', $options);

$this->add_help_button('grademethod');

}

function add_matrix()

{

$mform = $this->_form;

$data = $mform->exportValues();

if (isset($_POST['colshort']))

{

$cols_count = count($_POST['colshort']);

}

else if (isset($this->question->options->cols) && count($this->question->options->cols) > 0)

{

$cols_count = count($this->question->options->cols);

}

else

{

$cols_count = self::DEFAULT_COLS;

}

if ($add_cols = optional_param('add_cols', '', PARAM_TEXT))

{

$cols_count++;

}

if (isset($_POST['rowshort']))

{

$rows_count = count($_POST['rowshort']);

}

else if (isset($this->question->options->rows) && count($this->question->options->rows) > 0)

{

$rows_count = count($this->question->options->rows);

}

else

{

$rows_count = self::DEFAULT_ROWS;

}

if ($add_rows = optional_param('add_rows', '', PARAM_TEXT))

{

$rows_count++;

}

$grademethod = isset($data['grademethod']) ? $data['grademethod'] : qtype_matrix::defaut_grading()->get_name();

$grading = qtype_matrix::grading($grademethod);

$multiple = isset($data['multiple']) ? $data['multiple'] : true;

$matrix = array();

$html = '<table class="quedit matrix"><thead><tr>';

$html .= '<th></th>';

$matrix[] = $this->create_static($html);

for ($col = 0; $col < $cols_count; $col++)

{

$matrix[] = $this->create_static('<th>');

$matrix[] = $this->create_text("colshort[$col]");

$popup = $this->create_htmlpopup("collong[$col]", qtype_matrix::get_string('collong'));

$matrix = array_merge($matrix, $popup);

// $id = "popcol$col";

// $matrix[] = $this->create_static('<a class="pbutton" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >...</a>');

// $matrix[] = $this->create_static('<span id="' . $id . '" class="popup">');

// $matrix[] = $this->create_static('<a class="pbutton close" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >&nbsp;&nbsp;&nbsp;</a>');

// $matrix[] = $this->create_static('<span class="title">');

// $matrix[] = $this->create_static(qtype_matrix::get_string('collong'));

// $matrix[] = $this->create_static('</span>');

// $matrix[] = $this->create_htmleditor("collong[$col]");

// $matrix[] = $this->create_hidden("colid[$col]");

// $matrix[] = $this->create_static('</span>');

$matrix[] = $this->create_hidden("colid[$col]");

$matrix[] = $this->create_static('</th>');

}

$matrix[] = $this->create_static('<th>');

$matrix[] = $this->create_static(qtype_matrix::get_string('rowfeedback'));

$matrix[] = $this->create_static('</th>');

$matrix[] = $this->create_static('<th>');

$matrix[] = $this->create_submit('add_cols', ' ', array('class' => 'button add'));

$this->register_no_submit_button('add_cols');

$matrix[] = $this->create_static('</th>');

$matrix[] = $this->create_static('</tr></thead><tbody>');

for ($row = 0; $row < $rows_count; $row++)

{

$matrix[] = $this->create_static('<tr>');

$matrix[] = $this->create_static('<td>');

$matrix[] = $this->create_text("rowshort[$row]");

$popup = $this->create_htmlpopup("rowlong[$row]", qtype_matrix::get_string('rowlong'));

$matrix = array_merge($matrix, $popup);

$matrix[] = $this->create_hidden("rowid[$row]");

// $id = "poprow$row";

// $matrix[] = $this->create_static('<a class="pbutton" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >...</a>');

// $matrix[] = $this->create_static('<span id="' . $id . '" class="popup">');

// $matrix[] = $this->create_static('<a class="pbutton close" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >&nbsp;&nbsp;&nbsp;</a>');

// $matrix[] = $this->create_static('<span class="title">');

// $matrix[] = $this->create_static(qtype_matrix::get_string('rowlong'));

// $matrix[] = $this->create_static('</span>');

// $matrix[] = $this->create_htmleditor("rowlong[$row]");

// $matrix[] = $this->create_static('</span>');

// $matrix[] = $this->create_hidden("rowid[$row]");

$matrix[] = $this->create_static('</td>');

for ($col = 0; $col < $cols_count; $col++)

{

$matrix[] = $this->create_static('<td>');

$cell_content = $grading->create_cell_element($mform, $row, $col, $multiple);

$cell_content = $cell_content ? $cell_content : $this->create_static('');

$matrix[] = $cell_content;

$matrix[] = $this->create_static('</td>');

}

// $id = "popfeedback$row";

$matrix[] = $this->create_static('<td class="feedback">');

$popup = $this->create_htmlpopup("rowfeedback[$row]", qtype_matrix::get_string('rowfeedback'));

$matrix = array_merge($matrix, $popup);

// $matrix[] = $this->create_static('<a class="pbutton" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >...</a>');

// $matrix[] = $this->create_static('<span id="' . $id . '" class="popup">');

// $matrix[] = $this->create_static('<a class="pbutton close" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >&nbsp;&nbsp;&nbsp;</a>');

// $matrix[] = $this->create_static('<span class="title">');

// $matrix[] = $this->create_static(qtype_matrix::get_string('rowfeedback'));

// $matrix[] = $this->create_static('</span>');

// $matrix[] = $this->create_htmleditor("rowfeedback[$row]");

// $matrix[] = $this->create_static('</span>');

$matrix[] = $this->create_static('</td>');

$matrix[] = $this->create_static('<td></td>');

$matrix[] = $this->create_static('</tr>');

}

$matrix[] = $this->create_static('<tr>');

$matrix[] = $this->create_static('<td>');

$matrix[] = $this->create_submit('add_rows', ' ', array('class' => 'button add'));

$this->register_no_submit_button('add_rows');

$matrix[] = $this->create_static('</td>');

for ($col = 0; $col < $cols_count; $col++)

{

$matrix[] = $this->create_static('<td>');

$matrix[] = $this->create_static('</td>');

}

$matrix[] = $this->create_static('</tr>');

$matrix[] = $this->create_static('</tbody></table>');

$matrixheader = $this->create_header('matrixheader');

$matrix_group = $this->create_group('matrix', null, $matrix, '', false);

if (isset($this['tagsheader']))

{

$this->insert_element_before($matrixheader, 'tagsheader');

$refresh_button = $this->create_submit('refresh_matrix');

$this->register_no_submit_button('refresh_matrix');

$this->disabled_if('refresh_matrix', 'grademethod', 'eq', 'none');

$this->disabled_if('defaultgrade', 'grademethod', 'eq', 'none');

$this->insert_element_before($refresh_button, 'tagsheader');

$this->insert_element_before($matrix_group, 'tagsheader');

}

else

{

$this[] = $matrixheader;

$refresh_button = $this->create_submit('refresh_matrix');

$this->register_no_submit_button('refresh_matrix');

$this->disabled_if('refresh_matrix', 'grademethod', 'eq', 'none');

$this->disabled_if('defaultgrade', 'grademethod', 'eq', 'none');

$this[] = $refresh_button;

$this[] = $matrix_group;

}

if ($cols_count > 1)

{

$this->set_default('colshort[0]', qtype_matrix::get_string('true'));

$this->set_default('colshort[1]', qtype_matrix::get_string('false'));

}

}

public function get_javascript()

{

return <<<EOT

var YY = null;

window.mtrx_current = false;

function mtrx_popup(id)

{

var current_id = window.mtrx_current;

var new_id = '#' + id;

if(current_id == false)

{

node = YY.one(new_id);

node.setStyle('display', 'block');

window.mtrx_current = new_id;

}

else if(current_id == new_id)

{

node = YY.one(window.mtrx_current);

node.hide();

window.mtrx_current = false;

}

else

{

node = YY.one(current_id);

node.hide();

node = YY.one(new_id)

node.setStyle('display', 'block');

window.mtrx_current = new_id;

}

}

YUI(M.yui.loader).use('node', function(Y) {

YY = Y;

});

EOT;

}

//utility functions

protected function create_name()

{

static $count = 0;

return '__j' . $count++;

}

protected function create_javascript($js)

{

$html = '<script type="text/javascript">';

$html .= $js;

$html .= '</script>';

$name = $this->create_name();

return $this->_form->createElement('static', $name, null, $html);

}

protected function create_static($html)

{

$name = $this->create_name();

return $this->_form->createElement('static', $name, null, $html);

}

protected function create_text($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->createElement('text', $name, $label);

}

protected function create_htmleditor($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->createElement('htmleditor', $name, $label);

}

protected function create_htmlpopup($name, $label = '')

{

static $popcount = 0;

$popcount++;

$id = "htmlpopup$popcount";

$result = array();

$result[] = $this->create_static('<a class="pbutton" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >...</a>');

$result[] = $this->create_static('<span id="' . $id . '" class="popup">');

$result[] = $this->create_static('<a class="pbutton close" href="#" onclick="mtrx_popup(\'' . $id . '\');return false;" >&nbsp;&nbsp;&nbsp;</a>');

$result[] = $this->create_static('<span class="title">');

$result[] = $this->create_static($label);

$result[] = $this->create_static('</span>');

$result[] = $this->create_htmleditor($name);

$result[] = $this->create_static('</span>');

return $result;

}

protected function create_hidden($name, $value = null)

{

return $this->_form->createElement('hidden', $name, $value);

}

protected function create_group($name = null, $label = null, $elements = null, $separator = '', $appendName = true)

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->createElement('group', $name, $label, $elements, $separator, $appendName);

}

protected function create_header($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->createElement('header', $name, $label);

}

protected function create_submit($name, $label = '', $attributes = null)

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->createElement('submit', $name, $label, $attributes);

}

protected function add_javascript($js)

{

$this[] = $element = $this->create_javascript($js);

return $element;

}

protected function add_static($html)

{

return $this->_form->addElement('static', null, null, $html);

}

protected function add_text($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->addElement('text', $name, $label);

}

protected function add_htmleditor($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->addElement('htmleditor', $name, $label);

}

protected function add_hidden($name, $value = null)

{

return $this->_form->addElement('hidden', $name, $value);

}

protected function add_group($name = null, $label = null, $elements = null, $separator = '', $appendName = true)

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->addElement('group', $name, $label, $elements, $separator, $appendName);

}

protected function add_header($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->addElement('header', $name, $label);

}

protected function add_selectyesno($name, $label = '')

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

$result = $this->_form->addElement('selectyesno', $name, $label);

return $result;

}

protected function add_select($name, $label = '', $options = null)

{

if ($label === '')

{

$short_name = explode('[', $name);

$short_name = reset($short_name);

$label = qtype_matrix::get_string($short_name);

}

return $this->_form->addElement('select', $name, $label, $options);

}

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_help_button($elementname, $identifier = null, $component = 'qtype_matrix', $linktext = '', $suppresscheck = false)

{

if (is_null($identifier))

{

$identifier = $elementname;

}

return $this->_form->addHelpButton($elementname, $identifier, $component, $linktext, $suppresscheck);

}

protected function add_element($element)

{

return $this->_form->addElement($element);

}

protected function set_default($name, $value)

{

return $this->_form->setDefault($name, $value);

}

protected function element_exists($name)

{

return $this->_form->elementExists($name);

}

protected function insert_element_before($element, $before_name)

{

return $this->_form->insertElementBefore($element, $before_name);

}

protected function disabled_if($elementName, $dependentOn, $condition = 'notchecked', $value = '1')

{

return $this->_form->disabledIf($elementName, $dependentOn, $condition, $value);

}

protected function register_no_submit_button($name)

{

return $this->_form->registerNoSubmitButton($name);

}

public function offsetExists($offset)

{

return $this->_form->elementExists($offset);

}

public function offsetGet($offset)

{

return $this->_form->getElement($offset);

}

public function offsetSet($offset, $value)

{

$this->_form->addElement($value);

}

public function offsetUnset($offset)

{

$this->_form->removeElement($offset);

}

}