def save_file(self, new_data, new_object, original_object, change, rel):
super(ImageWithThumbnailField, self).save_file(new_data, new_object, original_object, change, rel)
# if change:
url = getattr(new_object, 'get_%s_url' % self.name)()
from births.thumbnails.utils import make_thumbnail, _remove_thumbnails
_remove_thumbnails(url) # clear all of the old thumbnails
make_thumbnail(url, width=120) # make admin thumbnail
def thumbnail(url, args=''):
""" Returns thumbnail URL and create it if not already exists.
.. note:: requires PIL_,
if PIL_ is not found or thumbnail can not be created returns original URL.
.. _PIL: http://www.pythonware.com/products/pil/
Usage::
{{ url|thumbnail:"width=10,height=20" }}
{{ url|thumbnail:"width=10" }}
{{ url|thumbnail:"height=20" }}
Parameters:
width
requested image width
height
requested image height
Image is **proportionally** resized to dimension which is no greather than ``width x height``.
Thumbnail file is saved in the same location as the original image
and his name is constructed like this::
%(dirname)s/%(basename)s_t[_w%(width)d][_h%(height)d].%(extension)s
or if only a width is requested (to be compatibile with admin interface)::
%(dirname)s/%(basename)s_t%(width)d.%(extension)s
"""
kwargs = {}
if args:
if ',' not in args:
# ensure at least one ','
args += ','
for arg in args.split(','):
arg = arg.strip()
if arg == '': continue
kw, val = arg.split('=', 1)
kw = kw.lower()
try:
val = int(val) # convert all ints
except ValueError:
raise template.TemplateSyntaxError, "thumbnail filter: argument %r is invalid integer (%r)" % (kw, val)
kwargs[kw] = val
# for
#
if ('width' not in kwargs) and ('height' not in kwargs):
raise template.TemplateSyntaxError, "thumbnail filter requires arguments (width and/or height)"
ret = make_thumbnail(url, **kwargs)
if ret is None:
return url
else:
return ret