@staticmethod
def names():
    """Return a tuple of all the names of the actions we support."""
    return ('print', 'fit_width', 'fit_height', 'fit_both', 'zoom_natural',
        'zoom_originalzoom_in', 'zoom_out', 'zoomer', 'rotate_left',
        'rotate_right', 'layout_single', 'layout_double_right',
        'layout_double_left', 'layout_raster', 'vertical', 'horizontal',
        'continuous', 'reload', 'previous_page', 'next_page', 'pager',
        'magnifier')
