added contrib/imageutils, thanks Bruno and Villas

VERSION

@@ -1 +1 @@
-Version 1.99.7 (2012-05-10 16:30:33) dev
+Version 1.99.7 (2012-05-10 18:02:10) dev

gluon/contrib/imageutils.py

@@ -0,0 +1,59 @@
+# -*- coding: utf-8 -*-
+
+#######################################################################
+#
+# Put this file in yourapp/modules/images.py
+#
+# Given the model
+#
+# db.define_table("table_name", Field("picture", "upload"), Field("thumbnail", "upload"))
+#
+# # to resize the picture on upload
+#
+# from images import RESIZE
+#
+# db.table_name.picture.requires = RESIZE(200, 200)
+#
+# # to store original image in picture and create a thumbnail in 'thumbnail' field
+#
+# from images import THUMB
+# db.table_name.thumbnail.compute = lambda row: THUMB(row.picture, 200, 200)
+
+#########################################################################
+from gluon import current
+
+class RESIZE(object):
+    def __init__(self, nx=160, ny=80, error_message=' image resize'):
+        (self.nx, self.ny, self.error_message) = (nx, ny, error_message)
+
+    def __call__(self, value):
+        if isinstance(value, str) and len(value) == 0:
+            return (value, None)
+        from PIL import Image
+        import cStringIO
+        try:
+            img = Image.open(value.file)
+            img.thumbnail((self.nx, self.ny), Image.ANTIALIAS)
+            s = cStringIO.StringIO()
+            img.save(s, 'JPEG', quality=100)
+            s.seek(0)
+            value.file = s
+        except:
+            return (value, self.error_message)
+        else:
+            return (value, None)
+
+def THUMB(image, nx=120, ny=120, gae=False, name='thumb'):
+    if image:
+        if not gae:
+            request = current.request
+            from PIL import Image
+            import os
+            img = Image.open(request.folder + 'uploads/' + image)
+            img.thumbnail((nx, ny), Image.ANTIALIAS)
+            root, ext = os.path.splitext(image)
+            thumb = '%s_%s%s' % (root, name, ext)
+            img.save(request.folder + 'uploads/' + thumb)
+            return thumb
+        else:
+            return image

gluon/dal.py

@@ -4661,7 +4661,7 @@ class MongoDBAdapter(NoSQLAdapter):
     # need to define all the 'sql' methods gt,lt etc....
 
     def select(self,query,fields,attributes,count=False,snapshot=False):
-        tablename, mongoqry_dict, mongofields_dict, 
+        tablename, mongoqry_dict, mongofields_dict, \
         mongosort_list, limitby_limit, limitby_skip = \
             self._select(query,fields,attributes)
         ctable = self.connection[tablename]