Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

 * Matching question renderer class.

 *

 * @package   qtype_match

 * @copyright 2009 The Open University

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

defined('MOODLE_INTERNAL') || die();

/**

 * Generates the output for matching questions.

 *

 * @copyright 2009 The Open University

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 */

class qtype_match_renderer extends qtype_with_combined_feedback_renderer {

    public function formulation_and_controls(question_attempt $qa,

            question_display_options $options) {

        $question = $qa->get_question();

        $stemorder = $question->get_stem_order();

        $response = $qa->get_last_qt_data();

        $choices = $this->format_choices($question);

        $result = '';

        $result .= html_writer::tag('div', $question->format_questiontext($qa),

                array('class' => 'qtext'));

        $result .= html_writer::start_tag('div', array('class' => 'ablock'));

        $result .= html_writer::start_tag('table', array('class' => 'answer'));

        $result .= html_writer::start_tag('tbody');

        $parity = 0;

        $i = 1;

        foreach ($stemorder as $key => $stemid) {

            $result .= html_writer::start_tag('tr', array('class' => 'r' . $parity));

            $fieldname = 'sub' . $key;

            $result .= html_writer::tag('td', $this->format_stem_text($qa, $stemid),

                    array('class' => 'text'));

            $classes = 'control';

            $feedbackimage = '';

            if (array_key_exists($fieldname, $response)) {

                $selected = $response[$fieldname];

            } else {

                $selected = 0;

            }

            $fraction = (int) ($selected && $selected == $question->get_right_choice_for($stemid));

            if ($options->correctness && $selected) {

                $classes .= ' ' . $this->feedback_class($fraction);

                $feedbackimage = $this->feedback_image($fraction);

            }

            $labeltext = $options->add_question_identifier_to_label(get_string('answer', 'qtype_match', $i));

            $result .= html_writer::tag('td',

                    html_writer::label($labeltext,

                            'menu' . $qa->get_qt_field_name('sub' . $key), false,

                            array('class' => 'accesshide')) .

                    html_writer::select($choices, $qa->get_qt_field_name('sub' . $key), $selected,

                            array('0' => 'choose'), array('disabled' => $options->readonly, 'class' => 'custom-select ml-1')) .

                    ' ' . $feedbackimage, array('class' => $classes));

            $result .= html_writer::end_tag('tr');

            $parity = 1 - $parity;

            $i++;

        }

        $result .= html_writer::end_tag('tbody');

        $result .= html_writer::end_tag('table');

        $result .= html_writer::end_tag('div'); // Closes <div class="ablock">.

        if ($qa->get_state() == question_state::$invalid) {

            $result .= html_writer::nonempty_tag('div',

                    $question->get_validation_error($response),

                    array('class' => 'validationerror'));

        }

        return $result;

    }

    public function specific_feedback(question_attempt $qa) {

        return $this->combined_feedback($qa);

    }

    /**

     * Format each question stem. Overwritten by randomsamatch renderer.

     *

     * @param question_attempt $qa

     * @param integer $stemid stem index

     * @return string

     */

    public function format_stem_text($qa, $stemid) {

        $question = $qa->get_question();

        return $question->format_text(

                    $question->stems[$stemid], $question->stemformat[$stemid],

                    $qa, 'qtype_match', 'subquestion', $stemid);

    }

    protected function format_choices($question) {

        $choices = array();

        foreach ($question->get_choice_order() as $key => $choiceid) {

            $choices[$key] = format_string($question->choices[$choiceid]);

        }

        return $choices;

    }

    public function correct_response(question_attempt $qa) {

        $question = $qa->get_question();

        $stemorder = $question->get_stem_order();

        $choices = $this->format_choices($question);

        $right = array();

        foreach ($stemorder as $key => $stemid) {

            if (!isset($choices[$question->get_right_choice_for($stemid)])) {

                continue;

            }

            $right[] = $question->make_html_inline($this->format_stem_text($qa, $stemid)) . ' → ' .

                    $choices[$question->get_right_choice_for($stemid)];

        }

        if (!empty($right)) {

            return get_string('correctansweris', 'qtype_match', implode(', ', $right));

        }

    }

}