Returns the movie instance for the loader widget.
        
        :return     <QMovie>

def getMovie():
        """
        Returns the movie instance for the loader widget.
        
        :return     <QMovie>
        """
        if not XLoaderWidget.MOVIE:
            filename = projexui.resources.find('img/ajax_loader.gif')
            XLoaderWidget.MOVIE = QMovie()
            XLoaderWidget.MOVIE.setFileName(filename)
            XLoaderWidget.MOVIE.start()
        
        return XLoaderWidget.MOVIE