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   1  var CSS = {
   2      ADDNEWQUESTIONBUTTONS: 'ul.menu a.addquestion',
   3      CREATENEWQUESTION: 'div.createnewquestion',
   4      CHOOSERDIALOGUE: 'div.chooserdialogue',
   5      CHOOSERHEADER: 'div.choosertitle'
   6  };
   7  
   8  /**
   9   * The questionchooser class  is responsible for instantiating and displaying the question chooser
  10   * when viewing a quiz in editing mode.
  11   *
  12   * @class questionchooser
  13   * @constructor
  14   * @protected
  15   * @extends M.core.chooserdialogue
  16   */
  17  var QUESTIONCHOOSER = function() {
  18      QUESTIONCHOOSER.superclass.constructor.apply(this, arguments);
  19  };
  20  
  21  Y.extend(QUESTIONCHOOSER, M.core.chooserdialogue, {
  22      initializer: function() {
  23          Y.one('body').delegate('click', this.display_dialogue, CSS.ADDNEWQUESTIONBUTTONS, this);
  24      },
  25  
  26      display_dialogue: function(e) {
  27          e.preventDefault();
  28          var dialogue = Y.one(CSS.CREATENEWQUESTION + ' ' + CSS.CHOOSERDIALOGUE),
  29              header = Y.one(CSS.CREATENEWQUESTION + ' ' + CSS.CHOOSERHEADER);
  30  
  31          if (this.container === null) {
  32              // Setup the dialogue, and then prepare the chooser if it's not already been set up.
  33              this.setup_chooser_dialogue(dialogue, header, {});
  34              this.prepare_chooser();
  35          }
  36  
  37          // Update all of the hidden fields within the questionbank form.
  38          var parameters = Y.QueryString.parse(e.currentTarget.get('search').substring(1));
  39          var form = this.container.one('form');
  40          this.parameters_to_hidden_input(parameters, form, 'returnurl');
  41          this.parameters_to_hidden_input(parameters, form, 'cmid');
  42          this.parameters_to_hidden_input(parameters, form, 'category');
  43          this.parameters_to_hidden_input(parameters, form, 'addonpage');
  44          this.parameters_to_hidden_input(parameters, form, 'appendqnumstring');
  45  
  46          // Display the chooser dialogue.
  47          this.display_chooser(e);
  48      },
  49  
  50      parameters_to_hidden_input: function(parameters, form, name) {
  51          var value;
  52          if (parameters.hasOwnProperty(name)) {
  53              value = parameters[name];
  54          } else {
  55              value = '';
  56          }
  57          var input = form.one('input[name=' + name + ']');
  58          if (!input) {
  59              input = form.appendChild('<input type="hidden">');
  60              input.set('name', name);
  61          }
  62          input.set('value', value);
  63      }
  64  }, {
  65      NAME: 'mod_quiz-questionchooser'
  66  });
  67  
  68  M.mod_quiz = M.mod_quiz || {};
  69  M.mod_quiz.init_questionchooser = function() {
  70      M.mod_quiz.question_chooser = new QUESTIONCHOOSER({});
  71      return M.mod_quiz.question_chooser;
  72  };