Proyectos de Subversion Moodle

// 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/>.

/**

 * AMD code for the frequently used comments chooser for the marking guide grading form.

 *

 * @module     gradingform_guide/comment_chooser

 * @copyright  2015 Jun Pataleta <jun@moodle.com>

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

 */

define(['jquery', 'core/templates', 'core/notification', 'core/yui'], function($, templates, notification) {

    // Private variables and functions.

    return /** @alias module:gradingform_guide/comment_chooser */ {

        // Public variables and functions.

        /**

         * Initialises the module.

         *

         * Basically, it performs the binding and handling of the button click event for

         * the 'Insert frequently used comment' button.

         *

         * @param {Integer} criterionId The criterion ID.

         * @param {String} buttonId The element ID of the button which the handler will be bound to.

         * @param {String} remarkId The element ID of the remark text area where the text of the selected comment will be copied to.

         * @param {Array} commentOptions The array of frequently used comments to be used as options.

         */

        initialise: function(criterionId, buttonId, remarkId, commentOptions) {

            /**

             * Display the chooser dialog using the compiled HTML from the mustache template

             * and binds onclick events for the generated comment options.

             *

             * @param {String} compiledSource The compiled HTML from the mustache template

             * @param {Array} comments Array containing comments.

             */

            function displayChooserDialog(compiledSource, comments) {

                var titleLabel = '<label>' + M.util.get_string('insertcomment', 'gradingform_guide') + '</label>';

                var cancelButtonId = 'comment-chooser-' + criterionId + '-cancel';

                var cancelButton = '<button id="' + cancelButtonId + '">' + M.util.get_string('cancel', 'moodle') + '</button>';

                // Set dialog's body content.

                var chooserDialog = new M.core.dialogue({

                    modal: true,

                    headerContent: titleLabel,

                    bodyContent: compiledSource,

                    footerContent: cancelButton,

                    focusAfterHide: '#' + remarkId,

                    id: "comments-chooser-dialog-" + criterionId

                });

                // Bind click event to the cancel button.

                $("#" + cancelButtonId).click(function() {

                    chooserDialog.hide();

                });

                // Loop over each comment item and bind click events.

                $.each(comments, function(index, comment) {

                    var commentOptionId = '#comment-option-' + criterionId + '-' + comment.id;

                    // Delegate click event for the generated option link.

                    $(commentOptionId).click(function() {

                        var remarkTextArea = $('#' + remarkId);

                        var remarkText = remarkTextArea.val();

                        // Add line break if the current value of the remark text is not empty.

                        if (remarkText.trim() !== '') {

                            remarkText += '\n';

                        }

                        remarkText += comment.description;

                        remarkTextArea.val(remarkText);

                        chooserDialog.hide();

                    });

                    // Handle keypress on list items.

                    $(document).off('keypress', commentOptionId).on('keypress', commentOptionId, function() {

                        var keyCode = event.which || event.keyCode;

                        // Enter or space key.

                        if (keyCode == 13 || keyCode == 32) {

                            // Trigger click event.

                            $(commentOptionId).click();

                        }

                    });

                });

                // Destroy the dialog when it is hidden to allow the grading section to

                // be loaded as a fragment multiple times within the same page.

                chooserDialog.after('visibleChange', function(e) {

                    // Going from visible to hidden.

                    if (e.prevVal && !e.newVal) {

                        this.destroy();

                    }

                }, chooserDialog);

                // Show dialog.

                chooserDialog.show();

            }

            /**

             * Generates the comments chooser dialog from the grading_form/comment_chooser mustache template.

             */

            function generateCommentsChooser() {

                // Template context.

                var context = {

                    criterionId: criterionId,

                    comments: commentOptions

                };

                // Render the template and display the comment chooser dialog.

                templates.render('gradingform_guide/comment_chooser', context)

                    .done(function(compiledSource) {

                        displayChooserDialog(compiledSource, commentOptions);

                    })

                    .fail(notification.exception);

            }

            // Bind click event for the comments chooser button.

            $("#" + buttonId).click(function(e) {

                e.preventDefault();

                generateCommentsChooser();

            });

        }

    };

});