FocusController constructor - Source which handles

focusController.js

/**
 * This controller will take care of determining where the focus moves when
 * a key press or mouse movement has occurred
 *
 * @constructor
 */
 function FocusController() {

...

    // Set up binding to listen for key presses
    $(document).bind('keydown.keycontroller',
        function(e) {
            this.onKeyDown(e);
        }.bind(this)
    );

...

}