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annotate gpp/bio/forms.py @ 33:c018872385ea

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Slideshow for home page; Initial checkin for the donations application.
author Brian Neal <bgneal@gmail.com>
date Wed, 03 Jun 2009 00:59:17 +0000
parents 5eed5e7c1c98
children c0d3b09c9b95
rev   line source
gremmie@1 1 """
gremmie@1 2 This file contains the forms used by the bio application.
gremmie@1 3 """
gremmie@1 4 from PIL import ImageFile
gremmie@1 5 from PIL import Image
gremmie@1 6
gremmie@1 7 try:
gremmie@1 8 from cStringIO import StringIO
gremmie@1 9 except:
gremmie@1 10 from StringIO import StringIO
gremmie@1 11
gremmie@1 12 from django import forms
gremmie@1 13 from django.conf import settings
gremmie@1 14 from django.core.files.base import ContentFile
gremmie@1 15 from django.contrib.auth.models import User
gremmie@1 16
gremmie@1 17 from bio.models import UserProfile
gremmie@1 18
gremmie@1 19
gremmie@1 20 class EditUserForm(forms.ModelForm):
gremmie@1 21 """Form for editing the fields of the User model."""
gremmie@1 22 email = forms.EmailField(label='Email', required=True)
gremmie@1 23 class Meta:
gremmie@1 24 model = User
gremmie@1 25 fields = ('first_name', 'last_name', 'email')
gremmie@1 26
gremmie@1 27
gremmie@1 28 class EditUserProfileForm(forms.ModelForm):
gremmie@1 29 """Form for editing the fields of the UserProfile model."""
gremmie@1 30 location = forms.CharField(required=False, widget=forms.TextInput(attrs={'size' : 64 }))
gremmie@1 31 occupation = forms.CharField(required=False, widget=forms.TextInput(attrs={'size' : 64 }))
gremmie@1 32 interests = forms.CharField(required=False, widget=forms.TextInput(attrs={'size' : 64 }))
gremmie@1 33
gremmie@1 34 class Meta:
gremmie@1 35 model = UserProfile
gremmie@1 36 exclude = ('user', 'avatar', 'profile_html', 'signature_html')
gremmie@1 37
gremmie@1 38 class Media:
gremmie@1 39 css = {
bgneal@6 40 'all': settings.GPP_THIRD_PARTY_CSS['markitup'] + \
bgneal@6 41 settings.GPP_THIRD_PARTY_CSS['jquery-ui']
gremmie@1 42 }
bgneal@12 43 js = settings.GPP_THIRD_PARTY_JS['markitup'] + \
bgneal@6 44 settings.GPP_THIRD_PARTY_JS['jquery-ui'] + \
bgneal@6 45 ('js/bio.js', )
gremmie@1 46
gremmie@1 47
gremmie@1 48 def get_image(file):
gremmie@1 49 """
gremmie@1 50 Returns a PIL Image from the supplied file.
gremmie@1 51 Throws ValidationError if the file does not parse as an image file.
gremmie@1 52 """
gremmie@1 53 parser = ImageFile.Parser()
gremmie@1 54 for chunk in file.chunks():
gremmie@1 55 parser.feed(chunk)
gremmie@1 56 try:
gremmie@1 57 image = parser.close()
gremmie@1 58 return image
gremmie@1 59 except IOError:
gremmie@1 60 pass
gremmie@1 61 raise forms.ValidationError("Upload a valid image. " +
gremmie@1 62 "The file you uploaded was either not an image or a corrupted image.")
gremmie@1 63
gremmie@1 64
gremmie@1 65 def scale_image(image, size):
gremmie@1 66 """Scales an image file if necessary."""
gremmie@1 67
gremmie@1 68 # don't upscale
gremmie@1 69 if (size, size) >= image.size:
gremmie@1 70 return image
gremmie@1 71
gremmie@1 72 (w, h) = image.size
gremmie@1 73 if w > h:
gremmie@1 74 diff = (w - h) / 2
gremmie@1 75 image = image.crop((diff, 0, w - diff, h))
gremmie@1 76 elif h > w:
gremmie@1 77 diff = (h - w) / 2
gremmie@1 78 image = image.crop((0, diff, w, h - diff))
gremmie@1 79 image = image.resize((size, size), Image.ANTIALIAS)
gremmie@1 80 return image
gremmie@1 81
gremmie@1 82
gremmie@1 83 class UploadAvatarForm(forms.Form):
gremmie@1 84 """Form used to change a user's avatar"""
gremmie@1 85 avatar_file = forms.ImageField(required=False)
gremmie@1 86 image = None
gremmie@1 87
gremmie@1 88 def clean_avatar_file(self):
gremmie@1 89 file = self.cleaned_data['avatar_file']
gremmie@1 90 if file is not None:
gremmie@1 91 if file.size > settings.MAX_AVATAR_SIZE_BYTES:
gremmie@1 92 raise forms.ValidationError("Please upload a file smaller than %s bytes." % \
gremmie@1 93 settings.MAX_AVATAR_SIZE)
gremmie@1 94 self.image = get_image(file)
gremmie@1 95 self.format = self.image.format
gremmie@1 96 return file
gremmie@1 97
gremmie@1 98 def get_file(self):
gremmie@1 99 if self.image is not None:
gremmie@1 100 self.image = scale_image(self.image, settings.MAX_AVATAR_SIZE_PIXELS)
gremmie@1 101 s = StringIO()
gremmie@1 102 self.image.save(s, self.format)
gremmie@1 103 return ContentFile(s.getvalue())
gremmie@1 104 return None
gremmie@1 105
gremmie@1 106 def get_filename(self):
gremmie@1 107 return self.cleaned_data['avatar_file'].name
gremmie@1 108