Package zinnia :: Package admin :: Module widgets
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Source Code for Module zinnia.admin.widgets

  1  """Widgets for Zinnia admin""" 
  2  from itertools import chain 
  3   
  4  from django import forms 
  5  from django.conf import settings 
  6  from django.contrib.admin import widgets 
  7  from django.utils.html import escape 
  8  from django.utils.html import conditional_escape 
  9  from django.utils.encoding import smart_unicode 
 10  from django.utils.encoding import force_unicode 
 11   
 12  from zinnia.settings import MEDIA_URL 
 13   
 14   
15 -class TreeNodeChoiceField(forms.ModelChoiceField):
16 """Duplicating the TreeNodeChoiceField bundled in django-mptt 17 to avoid conflict with the TreeNodeChoiceField bundled in django-cms..."""
18 - def __init__(self, level_indicator=u'---', *args, **kwargs):
19 self.level_indicator = level_indicator 20 if kwargs.get('required', True) and not 'empty_label' in kwargs: 21 kwargs['empty_label'] = None 22 super(TreeNodeChoiceField, self).__init__(*args, **kwargs)
23
24 - def label_from_instance(self, obj):
25 """Creates labels which represent the tree level of each node 26 when generating option labels.""" 27 return u'%s %s' % (self.level_indicator * getattr(obj, 28 obj._meta.level_attr), 29 smart_unicode(obj))
30 31
32 -class MPTTModelChoiceIterator(forms.models.ModelChoiceIterator):
33 """MPTT version of ModelChoiceIterator"""
34 - def choice(self, obj):
35 """Overriding choice method""" 36 tree_id = getattr(obj, getattr(self.queryset.model._meta, 37 'tree_id_atrr', 'tree_id'), 0) 38 left = getattr(obj, getattr(self.queryset.model._meta, 39 'left_atrr', 'lft'), 0) 40 return super(MPTTModelChoiceIterator, 41 self).choice(obj) + ((tree_id, left),)
42 43
44 -class MPTTModelMultipleChoiceField(forms.ModelMultipleChoiceField):
45 """MPTT version of ModelMultipleChoiceField"""
46 - def label_from_instance(self, obj):
47 """Overriding label_from_instance""" 48 level = getattr(obj, getattr(self.queryset.model._meta, 49 'level_attr', 'level'), 0) 50 return u'%s %s' % ('-' * level, smart_unicode(obj))
51
52 - def _get_choices(self):
53 """Overriding _get_choices""" 54 if hasattr(self, '_choices'): 55 return self._choices 56 return MPTTModelChoiceIterator(self)
57 58 choices = property(_get_choices, forms.ChoiceField._set_choices)
59 60
61 -class MPTTFilteredSelectMultiple(widgets.FilteredSelectMultiple):
62 """MPTT version of FilteredSelectMultiple"""
63 - def __init__(self, verbose_name, is_stacked, attrs=None, choices=()):
64 super(MPTTFilteredSelectMultiple, self).__init__( 65 verbose_name, is_stacked, attrs, choices)
66
67 - def render_options(self, choices, selected_choices):
68 """ 69 This is copy'n'pasted from django.forms.widgets Select(Widget) 70 change to the for loop and render_option so they will unpack 71 and use our extra tuple of mptt sort fields (if you pass in 72 some default choices for this field, make sure they have the 73 extra tuple too!) 74 """ 75 def render_option(option_value, option_label, sort_fields): 76 """Inner scope render_option""" 77 option_value = force_unicode(option_value) 78 selected_html = (option_value in selected_choices) \ 79 and u' selected="selected"' or '' 80 return u'<option value="%s" data-tree-id="%s" ' \ 81 'data-left-value="%s"%s>%s</option>' % ( 82 escape(option_value), 83 sort_fields[0], 84 sort_fields[1], 85 selected_html, 86 conditional_escape(force_unicode(option_label)), 87 )
88 # Normalize to strings. 89 selected_choices = set([force_unicode(v) for v in selected_choices]) 90 output = [] 91 for option_value, option_label, sort_fields in chain( 92 self.choices, choices): 93 if isinstance(option_label, (list, tuple)): 94 output.append(u'<optgroup label="%s">' % escape( 95 force_unicode(option_value))) 96 for option in option_label: 97 output.append(render_option(*option)) 98 output.append(u'</optgroup>') 99 else: 100 output.append(render_option(option_value, option_label, 101 sort_fields)) 102 return u'\n'.join(output)
103
104 - class Media:
105 """MPTTFilteredSelectMultiple's Media""" 106 js = (settings.ADMIN_MEDIA_PREFIX + 'js/core.js', 107 MEDIA_URL + 'js/mptt_m2m_selectbox.js', 108 settings.ADMIN_MEDIA_PREFIX + 'js/SelectFilter2.js',)
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