type = CALCULATED_ANSWER; $this->isContent = $this->getIsContent(); } /** * {@inheritdoc} */ public function createAnswersForm($form) { $defaults = []; //$defaults['answer'] = get_lang('

Example fill the form activity : calculate the Body Mass Index
Age [25] years old
Sex [M] (M or F)
Weight 95 Kg
Height 1.81 m
Body Mass Index [29] BMI =Weight/Size2 (Cf. Wikipedia article)
'); $defaults['answer'] = get_lang('DefaultTextInBlanks'); if (!empty($this->id)) { $objAnswer = new Answer($this->id); $preArray = explode('@@', $objAnswer->selectAnswer(1)); $defaults['formula'] = array_pop($preArray); $defaults['answer'] = array_shift($preArray); $defaults['answer'] = preg_replace("/\[.*\]/", '', $defaults['answer']); $defaults['weighting'] = $this->weighting; } $lowestValue = '1.00'; $highestValue = '20.00'; // javascript // echo ''; // answer $form->addElement('label', null, '

'.get_lang('Please type your text below').', '.get_lang('and').' '.get_lang('use square brackets [...] to define one or more blanks')); $form->addElement( 'html_editor', 'answer', Display::return_icon('fill_field.png'), [ 'id' => 'answer', 'onkeyup' => 'javascript: updateBlanks(this);', ], [ 'ToolbarSet' => 'TestQuestionDescription', 'Width' => '100%', 'Height' => '350', ] ); $form->addRule('answer', get_lang('Please type the text'), 'required'); $form->addRule('answer', get_lang('Please define at least one blank with square brackets [...]'), 'regex', '/\[.*\]/'); $form->addElement('label', null, get_lang('If you want only integer values write both limits without decimals')); $form->addElement('html', '
'); $notationListButton = Display::url( get_lang('Formula notation'), api_get_path(WEB_CODE_PATH).'exercise/evalmathnotation.php', [ 'class' => 'btn btn-info ajax', 'data-title' => get_lang('Formula notation'), '_target' => '_blank', ] ); $form->addElement( 'label', null, $notationListButton ); $form->addElement('text', 'formula', [get_lang('Formula'), get_lang('Formula sample: sqrt( [x] / [y] ) * ( e ^ ( ln(pi) ) )')], ['id' => 'formula']); $form->addRule('formula', get_lang('Please, write the formula'), 'required'); $form->addElement('text', 'weighting', get_lang('Score'), ['id' => 'weighting']); $form->setDefaults(['weighting' => '10']); $form->addElement('text', 'answerVariations', get_lang('Question variations')); $form->addRule( 'answerVariations', get_lang('GiveQuestion variations'), 'required' ); $form->setDefaults(['answerVariations' => '1']); global $text; // setting the save button here and not in the question class.php $form->addButtonSave($text, 'submitQuestion'); if (!empty($this->id)) { $form->setDefaults($defaults); } else { if ($this->isContent == 1) { $form->setDefaults($defaults); } } } /** * {@inheritdoc} */ public function processAnswersCreation($form, $exercise) { if (!self::isAnswered()) { $table = Database::get_course_table(TABLE_QUIZ_ANSWER); Database::delete( $table, [ 'c_id = ? AND question_id = ?' => [ $this->course['real_id'], $this->id, ], ] ); $answer = $form->getSubmitValue('answer'); $formula = $form->getSubmitValue('formula'); $lowestValues = $form->getSubmitValue('lowestValue'); $highestValues = $form->getSubmitValue('highestValue'); $answerVariations = $form->getSubmitValue('answerVariations'); $this->weighting = $form->getSubmitValue('weighting'); // Create as many answers as $answerVariations for ($j = 0; $j < $answerVariations; $j++) { $auxAnswer = $answer; $auxFormula = $formula; $nb = preg_match_all('/\[[^\]]*\]/', $auxAnswer, $blanks); if ($nb > 0) { for ($i = 0; $i < $nb; $i++) { $blankItem = $blanks[0][$i]; // take random float values when one or both edge values have a decimal point $randomValue = (strpos($lowestValues[$i], '.') !== false || strpos($highestValues[$i], '.') !== false) ? mt_rand($lowestValues[$i] * 100, $highestValues[$i] * 100) / 100 : mt_rand($lowestValues[$i], $highestValues[$i]); $auxAnswer = str_replace($blankItem, $randomValue, $auxAnswer); $auxFormula = str_replace($blankItem, $randomValue, $auxFormula); } $math = new EvalMath(); $result = $math->evaluate($auxFormula); $result = number_format($result, 2, '.', ''); // Remove decimal trailing zeros $result = rtrim($result, '0'); // If it is an integer (ends in .00) remove the decimal point if (mb_substr($result, -1) === '.') { $result = str_replace('.', '', $result); } // Attach formula $auxAnswer .= " [".$result."]@@".$formula; } $this->save($exercise); $objAnswer = new Answer($this->id); $objAnswer->createAnswer($auxAnswer, 1, '', $this->weighting, ''); $objAnswer->position = []; $objAnswer->save(); } } } /** * {@inheritdoc} */ public function return_header(Exercise $exercise, $counter = null, $score = []) { $header = parent::return_header($exercise, $counter, $score); $header .= ''; $header .= ''; if ($exercise->showExpectedChoice()) { $header .= ''; if ($exercise->showExpectedChoiceColumn()) { $header .= ''; } $header .= ''; } $header .= ''; return $header; } /** * Returns true if the current question has been attempted to be answered. * * @return bool */ public function isAnswered() { $table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ATTEMPT); $result = Database::select( 'question_id', $table, [ 'where' => [ 'question_id = ? AND c_id = ?' => [ $this->id, $this->course['real_id'], ], ], ] ); return empty($result) ? false : true; } }
'.get_lang('Answer').''.get_lang('Your choice').''.get_lang('Expected choice').''.get_lang('Status').'