def preview(self, height=None, width=None, alt=None,
scale=0, xscale=0, yscale=0, css_class=None, title=None, **args):
""" allow custom imageEdit form to work as expected by returning
Image.tag result for the preview image """
result = ''
if hasattr(self, 'TileGroup0') and hasattr(self.TileGroup0, '0-0-0.jpg'):
result = Image.tag(self.TileGroup0['0-0-0.jpg'], height=height, width=width,
alt=alt, scale=scale,
xscale=xscale, yscale=yscale,
css_class=css_class,
title=title, **args)
else:
result = 'The image is not yet ready to be displayed.'
return result
