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Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 and 403] [Versions 401 and 403]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  
  18  /**
  19   * Numerical question renderer class.
  20   *
  21   * @package qtype_numerical
  22   * @copyright 2009 The Open University
  23   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  
  27  /**
  28   * Generates the output for short answer questions.
  29   *
  30   * @copyright 2009 The Open University
  31   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  32   */
  33  class qtype_numerical_renderer extends qtype_renderer {
  34      public function formulation_and_controls(question_attempt $qa,
  35              question_display_options $options) {
  36  
  37          $question = $qa->get_question();
  38          $currentanswer = $qa->get_last_qt_var('answer');
  39          if ($question->has_separate_unit_field()) {
  40              $selectedunit = $qa->get_last_qt_var('unit');
  41          } else {
  42              $selectedunit = null;
  43          }
  44  
  45          $inputname = $qa->get_qt_field_name('answer');
  46          $inputattributes = array(
  47              'type' => 'text',
  48              'name' => $inputname,
  49              'value' => $currentanswer,
  50              'id' => $inputname,
  51              'size' => 30,
  52              'class' => 'form-control d-inline',
  53          );
  54  
  55          if ($options->readonly) {
  56              $inputattributes['readonly'] = 'readonly';
  57          }
  58  
  59          $feedbackimg = '';
  60          if ($options->correctness) {
  61              list($value, $unit, $multiplier) = $question->ap->apply_units(
  62                      $currentanswer, $selectedunit);
  63              $answer = $question->get_matching_answer($value, $multiplier);
  64              if ($answer) {
  65                  $unitisright = $question->is_unit_right($answer, $value, $multiplier);
  66                  $fraction = $question->apply_unit_penalty($answer->fraction, $unitisright);
  67              } else {
  68                  $fraction = 0;
  69              }
  70              $inputattributes['class'] .= ' ' . $this->feedback_class($fraction);
  71              $feedbackimg = $this->feedback_image($fraction);
  72          }
  73  
  74          $questiontext = $question->format_questiontext($qa);
  75          $placeholder = false;
  76          if (preg_match('/_____+/', $questiontext, $matches)) {
  77              $placeholder = $matches[0];
  78              $inputattributes['size'] = round(strlen($placeholder) * 1.1);
  79          }
  80  
  81          $input = html_writer::empty_tag('input', $inputattributes) . $feedbackimg;
  82  
  83          if ($question->has_separate_unit_field()) {
  84              if ($question->unitdisplay == qtype_numerical::UNITRADIO) {
  85                  $choices = array();
  86                  $i = 1;
  87                  foreach ($question->ap->get_unit_options() as $unit) {
  88                      $id = $qa->get_qt_field_name('unit') . '_' . $i++;
  89                      $radioattrs = array('type' => 'radio', 'id' => $id, 'value' => $unit,
  90                              'name' => $qa->get_qt_field_name('unit'));
  91                      if ($unit == $selectedunit) {
  92                          $radioattrs['checked'] = 'checked';
  93                      }
  94                      $choices[] = html_writer::tag('label',
  95                              html_writer::empty_tag('input', $radioattrs) . $unit,
  96                              array('for' => $id, 'class' => 'unitchoice'));
  97                  }
  98  
  99                  $unitchoice = html_writer::tag('span', implode(' ', $choices),
 100                          array('class' => 'unitchoices'));
 101  
 102              } else if ($question->unitdisplay == qtype_numerical::UNITSELECT) {
 103                  $unitchoice = html_writer::label(get_string('selectunit', 'qtype_numerical'),
 104                          'menu' . $qa->get_qt_field_name('unit'), false, array('class' => 'accesshide'));
 105                  $unitchoice .= html_writer::select($question->ap->get_unit_options(),
 106                          $qa->get_qt_field_name('unit'), $selectedunit, array(''=>'choosedots'),
 107                          array('disabled' => $options->readonly));
 108              }
 109  
 110              if ($question->ap->are_units_before()) {
 111                  $input = $unitchoice . ' ' . $input;
 112              } else {
 113                  $input = $input . ' ' . $unitchoice;
 114              }
 115          }
 116  
 117          if ($placeholder) {
 118              $inputinplace = html_writer::tag('label', $options->add_question_identifier_to_label(get_string('answer')),
 119                      array('for' => $inputattributes['id'], 'class' => 'sr-only'));
 120              $inputinplace .= $input;
 121              $questiontext = substr_replace($questiontext, $inputinplace,
 122                      strpos($questiontext, $placeholder), strlen($placeholder));
 123          }
 124  
 125          $result = html_writer::tag('div', $questiontext, array('class' => 'qtext'));
 126  
 127          if (!$placeholder) {
 128              $result .= html_writer::start_tag('div', array('class' => 'ablock form-inline'));
 129              $label = $options->add_question_identifier_to_label(get_string('answercolon', 'qtype_numerical'), true);
 130              $result .= html_writer::tag('label', $label,
 131                  array('for' => $inputattributes['id']));
 132              $result .= html_writer::tag('span', $input, array('class' => 'answer'));
 133              $result .= html_writer::end_tag('div');
 134          }
 135  
 136          if ($qa->get_state() == question_state::$invalid) {
 137              $result .= html_writer::nonempty_tag('div',
 138                      $question->get_validation_error(array('answer' => $currentanswer, 'unit' => $selectedunit)),
 139                      array('class' => 'validationerror'));
 140          }
 141  
 142          return $result;
 143      }
 144  
 145      public function specific_feedback(question_attempt $qa) {
 146          $question = $qa->get_question();
 147  
 148          if ($question->has_separate_unit_field()) {
 149              $selectedunit = $qa->get_last_qt_var('unit');
 150          } else {
 151              $selectedunit = null;
 152          }
 153          list($value, $unit, $multiplier) = $question->ap->apply_units(
 154                  $qa->get_last_qt_var('answer'), $selectedunit);
 155          $answer = $question->get_matching_answer($value, $multiplier);
 156  
 157          if ($answer && $answer->feedback) {
 158              $feedback = $question->format_text($answer->feedback, $answer->feedbackformat,
 159                      $qa, 'question', 'answerfeedback', $answer->id);
 160          } else {
 161              $feedback = '';
 162          }
 163  
 164          if ($question->unitgradingtype && !$question->ap->is_known_unit($unit)) {
 165              $feedback .= html_writer::tag('p', get_string('unitincorrect', 'qtype_numerical'));
 166          }
 167  
 168          return $feedback;
 169      }
 170  
 171      public function correct_response(question_attempt $qa) {
 172          $question = $qa->get_question();
 173          $answer = $question->get_correct_answer();
 174          if (!$answer) {
 175              return '';
 176          }
 177  
 178          $response = str_replace('.', $question->ap->get_point(), $answer->answer);
 179          if ($question->unitdisplay != qtype_numerical::UNITNONE) {
 180              $response = $question->ap->add_unit($response);
 181          }
 182  
 183          return get_string('correctansweris', 'qtype_shortanswer', $response);
 184      }
 185  }