Suitable for use with DecimalField. Handy for accurate timing input (think sports, racing etc.).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | class TimeWidget(forms.MultiWidget):
"""Input accurate timing. IntegerFields for hours, minutes, seconds, milliseconds."""
NUM_FIELDS = 4 # Hours, Minutes, Seconds, Milliseconds
def __init__(self, attrs=None):
widgets = [forms.TextInput()] * self.NUM_FIELDS
super(TimeWidget, self).__init__(widgets, attrs)
def format_output(self, widgets):
widgets.insert(1, ' : ')
widgets.insert(3, ' : ')
widgets.insert(5, ' . ')
return mark_safe(''.join(widgets))
def decompress(self, value):
if value:
return ('%d' % (value/3600), '%02d' % (value%3600/60),
'%02d' % (value%3600%60), '%03d' % (value%1*1000))
return [None] * self.NUM_FIELDS
class TimeField(forms.MultiValueField):
"""Input accurate timing. Interface with models.DecimalField for great success."""
LABELS = ['Hours', 'Minutes', 'Seconds', 'Milliseconds']
SECONDS = [ 60*60, 60, 1, 0.001]
widget = TimeWidget()
def __init__(self, *args, **kwargs):
fields = [forms.CharField(label=label) for label in self.LABELS]
super(TimeField, self).__init__(fields, *args, **kwargs)
def compress(self, value):
if value:
from operator import add, mul
return str(reduce(add,
map(lambda x: mul(*x),
zip(map(float, value), self.SECONDS))))
return None
|
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