Unnamed

class HexColourPicker(TextInput):
    def __init__(self, attrs=None,
        template='forms/widgets/hex_colourpicker.html'):
        super(TextInput, self).__init__(attrs)
        self.template = template

    def render(self, name, value, attrs=None, choices=()):
        if value is None: value = ''
        elif len(value) > 0 and value[0] == '#': value = value[1:]
        final_attrs = self.build_attrs(attrs, name=name)
        flat_att = forms.util.flatatt(final_attrs)
        output = render_to_string(self.template, {
            'name': name,
            'value': value,
            'rgb_value': HexColourField.hex_to_rgb(value) \
                if value else HexColourField.hex_to_rgb('#FFFFFF'),
            'final_attrs': final_attrs,
            'flat_att': flat_att,
        })
        return mark_safe(output)

class HexColourField(fields.Field):
    widget = HexColourPicker
    default_error_messages = {
        'hex_error': _('This is an invalid color code. '+\
            'It must be given in a valid hexadecimal format: e.g. #000000')
    }

    @staticmethod
    def hex_to_rgb(value):
        if value[0] == '#': value = value[1:]
        return (int('0x%s' % value[0:2], 0), 
            int('0x%s' % value[2:4], 0), int('0x%s' % value[4:6], 0))

    def clean(self, value):
        
        super(HexColourField, self).clean(value)
        
        if value in fields.EMPTY_VALUES:
            return u''
        
        value = smart_unicode(value)
        value_length = len(value)
        
        if value_length != 7 or not re.match(
            '^\#([a-fA-F0-9]{6}|[a-fA-F0-9]{3})$', value):
            raise ValidationError(self.error_messages['hex_error'])
        
        return value.lower( )[1:]

    def widget_attrs(self, widget):
        if isinstance(widget, (fields.TextInput)) or \
            isinstance(widget, (HexColourPicker)):
            return {'maxlength': str(7), 'size': str(7)}