code: function(v, oSelf) {
          var category = this.category;
          if(!this.checked) {
              oSelf.hideCategory(category);
          }
          else {
              oSelf.showCategory(category);
          }
      }
docs: Handles check events on the category filter checkboxes.
  
  @method _onCheckCategory
  @param v {HTMLEvent} The click event.
  @param oSelf {Object} The LogReader instance.
  @private