question/type/truefalse/renderer.php

   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  * True-false question renderer class.
  19  *
  20  * @package    qtype
  21  * @subpackage truefalse
  22  * @copyright  2009 The Open University
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26
  27 defined('MOODLE_INTERNAL') || die();
  28
  29
  30 /**
  31  * Generates the output for true-false questions.
  32  *
  33  * @copyright  2009 The Open University
  34  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35  */
  36 class qtype_truefalse_renderer extends qtype_renderer {
  37     public function formulation_and_controls(question_attempt $qa,
  38             question_display_options $options) {
  39
  40         $question = $qa->get_question();
  41         $response = $qa->get_last_qt_var('answer', '');
  42
  43         $inputname = $qa->get_qt_field_name('answer');
  44         $trueattributes = array(
  45             'type' => 'radio',
  46             'name' => $inputname,
  47             'value' => 1,
  48             'id' => $inputname . 'true',
  49         );
  50         $falseattributes = array(
  51             'type' => 'radio',
  52             'name' => $inputname,
  53             'value' => 0,
  54             'id' => $inputname . 'false',
  55         );
  56
  57         if ($options->readonly) {
  58             $trueattributes['disabled'] = 'disabled';
  59             $falseattributes['disabled'] = 'disabled';
  60         }
  61
  62         // Work out which radio button to select (if any).
  63         $truechecked = false;
  64         $falsechecked = false;
  65         $responsearray = array();
  66         if ($response) {
  67             $trueattributes['checked'] = 'checked';
  68             $truechecked = true;
  69             $responsearray = array('answer' => 1);
  70         } else if ($response !== '') {
  71             $falseattributes['checked'] = 'checked';
  72             $falsechecked = true;
  73             $responsearray = array('answer' => 1);
  74         }
  75
  76         // Work out visual feedback for answer correctness.
  77         $trueclass = '';
  78         $falseclass = '';
  79         $truefeedbackimg = '';
  80         $falsefeedbackimg = '';
  81         if ($options->correctness) {
  82             if ($truechecked) {
  83                 $trueclass = ' ' . $this->feedback_class((int) $question->rightanswer);
  84                 $truefeedbackimg = $this->feedback_image((int) $question->rightanswer);
  85             } else if ($falsechecked) {
  86                 $falseclass = ' ' . $this->feedback_class((int) (!$question->rightanswer));
  87                 $falsefeedbackimg = $this->feedback_image((int) (!$question->rightanswer));
  88             }
  89         }
  90
  91         $radiotrue = html_writer::empty_tag('input', $trueattributes) .
  92                 html_writer::tag('label', get_string('true', 'qtype_truefalse'),
  93                 array('for' => $trueattributes['id'], 'class' => 'ml-1'));
  94         $radiofalse = html_writer::empty_tag('input', $falseattributes) .
  95                 html_writer::tag('label', get_string('false', 'qtype_truefalse'),
  96                 array('for' => $falseattributes['id'], 'class' => 'ml-1'));
  97
  98         $result = '';
  99         $result .= html_writer::tag('div', $question->format_questiontext($qa),
 100                 array('class' => 'qtext'));
 101
 102         $result .= html_writer::start_tag('fieldset', array('class' => 'ablock'));
 103         $questionnumber = $options->add_question_identifier_to_label(get_string('selectone', 'qtype_truefalse'), true, true);
 104         $result .= html_writer::tag('legend', $questionnumber,
 105             array('class' => 'prompt h6 font-weight-normal'));
 106
 107         $result .= html_writer::start_tag('div', array('class' => 'answer'));
 108         $result .= html_writer::tag('div', $radiotrue . ' ' . $truefeedbackimg,
 109                 array('class' => 'r0' . $trueclass));
 110         $result .= html_writer::tag('div', $radiofalse . ' ' . $falsefeedbackimg,
 111                 array('class' => 'r1' . $falseclass));
 112         $result .= html_writer::end_tag('div'); // Answer.
 113
 114         $result .= html_writer::end_tag('fieldset'); // Ablock.
 115
 116         if ($qa->get_state() == question_state::$invalid) {
 117             $result .= html_writer::nonempty_tag('div',
 118                     $question->get_validation_error($responsearray),
 119                     array('class' => 'validationerror'));
 120         }
 121
 122         return $result;
 123     }
 124
 125     public function specific_feedback(question_attempt $qa) {
 126         $question = $qa->get_question();
 127         $response = $qa->get_last_qt_var('answer', '');
 128
 129         if ($response) {
 130             return $question->format_text($question->truefeedback, $question->truefeedbackformat,
 131                     $qa, 'question', 'answerfeedback', $question->trueanswerid);
 132         } else if ($response !== '') {
 133             return $question->format_text($question->falsefeedback, $question->falsefeedbackformat,
 134                     $qa, 'question', 'answerfeedback', $question->falseanswerid);
 135         }
 136     }
 137
 138     public function correct_response(question_attempt $qa) {
 139         $question = $qa->get_question();
 140
 141         if ($question->rightanswer) {
 142             return get_string('correctanswertrue', 'qtype_truefalse');
 143         } else {
 144             return get_string('correctanswerfalse', 'qtype_truefalse');
 145         }
 146     }
 147 }