django-orchestra/orchestra/forms/widgets.py

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import re
import textwrap
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from django import forms
from django.utils.safestring import mark_safe
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from django.contrib.admin.templatetags.admin_static import static
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class SpanWidget(forms.Widget):
"""
Renders a value wrapped in a <span> tag.
Requires use of specific form support. (see ReadonlyForm or ReadonlyModelForm)
"""
def __init__(self, *args, **kwargs):
self.tag = kwargs.pop('tag', '<span>')
self.original = kwargs.pop('original', '')
self.display = kwargs.pop('display', None)
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super(SpanWidget, self).__init__(*args, **kwargs)
def render(self, name, value, attrs=None):
final_attrs = self.build_attrs(attrs, name=name)
original = self.original or value
display = original if self.display is None else self.display
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# Display icon
if isinstance(original, bool):
icon = static('admin/img/icon-%s.svg' % ('yes' if original else 'no',))
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return mark_safe('<img src="%s" alt="%s">' % (icon, display))
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tag = self.tag[:-1]
endtag = '/'.join((self.tag[0], self.tag[1:]))
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return mark_safe('%s%s >%s%s' % (tag, forms.utils.flatatt(final_attrs), display, endtag))
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def value_from_datadict(self, data, files, name):
return self.original
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def _has_changed(self, initial, data):
return False
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def paddingCheckboxSelectMultiple(padding):
""" Ugly hack to render this widget nicely on Django admin """
widget = forms.CheckboxSelectMultiple()
old_render = widget.render
def render(self, *args, **kwargs):
value = old_render(self, *args, **kwargs)
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value = re.sub(r'^<ul id=([^>]+)>',
r'<ul id=\1 style="padding-left:%ipx">' % padding, value, 1)
return mark_safe(value)
widget.render = render
return widget
class DynamicHelpTextSelect(forms.Select):
def __init__(self, target, help_text, *args, **kwargs):
help_text = self.get_dynamic_help_text(target, help_text)
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attrs = kwargs.get('attrs', {})
attrs.update({
'onClick': help_text,
'onChange': help_text,
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})
attrs.update(kwargs.get('attrs', {}))
kwargs['attrs'] = attrs
super(DynamicHelpTextSelect, self).__init__(*args, **kwargs)
def get_dynamic_help_text(self, target, help_text):
return textwrap.dedent("""\
siteoptions = {help_text};
valueelement = $("#" + {target});
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help_text = siteoptions[this.options[this.selectedIndex].value] || ""
valueelement.parent().find('p').remove();
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valueelement.parent().append("<p class='help'>" + help_text + "</p>");\
""".format(target=target, help_text=str(help_text))
)