80 lines
2.6 KiB
Python
80 lines
2.6 KiB
Python
"""
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Extra HTML Widget classes
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"""
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import datetime
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import re
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from django.forms.widgets import Widget, Select
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from django.utils.dates import MONTHS
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from django.utils.safestring import mark_safe
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__all__ = ('SelectDateWidget',)
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RE_DATE = re.compile(r'(\d{4})-(\d\d?)-(\d\d?)$')
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class SelectDateWidget(Widget):
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"""
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A Widget that splits date input into three <select> boxes.
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This also serves as an example of a Widget that has more than one HTML
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element and hence implements value_from_datadict.
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"""
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month_field = '%s_month'
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day_field = '%s_day'
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year_field = '%s_year'
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def __init__(self, attrs=None, years=None):
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# years is an optional list/tuple of years to use in the "year" select box.
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self.attrs = attrs or {}
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if years:
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self.years = years
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else:
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this_year = datetime.date.today().year
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self.years = range(this_year, this_year+10)
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def render(self, name, value, attrs=None):
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try:
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year_val, month_val, day_val = value.year, value.month, value.day
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except AttributeError:
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year_val = month_val = day_val = None
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if isinstance(value, basestring):
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match = RE_DATE.match(value)
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if match:
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year_val, month_val, day_val = [int(v) for v in match.groups()]
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output = []
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if 'id' in self.attrs:
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id_ = self.attrs['id']
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else:
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id_ = 'id_%s' % name
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month_choices = MONTHS.items()
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month_choices.sort()
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local_attrs = self.build_attrs(id=self.month_field % id_)
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select_html = Select(choices=month_choices).render(self.month_field % name, month_val, local_attrs)
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output.append(select_html)
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day_choices = [(i, i) for i in range(1, 32)]
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local_attrs['id'] = self.day_field % id_
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select_html = Select(choices=day_choices).render(self.day_field % name, day_val, local_attrs)
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output.append(select_html)
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year_choices = [(i, i) for i in self.years]
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local_attrs['id'] = self.year_field % id_
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select_html = Select(choices=year_choices).render(self.year_field % name, year_val, local_attrs)
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output.append(select_html)
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return mark_safe(u'\n'.join(output))
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def id_for_label(self, id_):
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return '%s_month' % id_
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id_for_label = classmethod(id_for_label)
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def value_from_datadict(self, data, files, name):
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y, m, d = data.get(self.year_field % name), data.get(self.month_field % name), data.get(self.day_field % name)
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if y and m and d:
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return '%s-%s-%s' % (y, m, d)
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return data.get(name, None)
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