49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
from django import forms
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from django.core import validators
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class LatLonWidget(forms.MultiWidget):
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"""
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A Widget that splits Point input into two latitude/longitude boxes.
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"""
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def __init__(self, attrs=None, date_format=None, time_format=None):
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widgets = (forms.HiddenInput(attrs=attrs), forms.HiddenInput(attrs=attrs))
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super(LatLonWidget, self).__init__(widgets, attrs)
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def decompress(self, value):
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if value:
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return tuple(reversed(value.coords))
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return (None, None)
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class LatLonField(forms.MultiValueField):
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widget = LatLonWidget
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srid = 4326
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default_error_messages = {
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"invalid_latitude": (u"Entrez une latitude valide."),
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"invalid_longitude": (u"Entrez une longitude valide."),
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}
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def __init__(self, *args, **kwargs):
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fields = (
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forms.FloatField(min_value=-90, max_value=90),
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forms.FloatField(min_value=-180, max_value=180),
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)
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super(LatLonField, self).__init__(fields, *args, **kwargs)
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def compress(self, data_list):
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if data_list:
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# Raise a validation error if latitude or longitude is empty
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# (possible if LatLongField has required=False).
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if data_list[0] in validators.EMPTY_VALUES:
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raise forms.ValidationError(self.error_messages["invalid_latitude"])
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if data_list[1] in validators.EMPTY_VALUES:
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raise forms.ValidationError(self.error_messages["invalid_longitude"])
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# SRID=4326;POINT(1.12345789 1.123456789)
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srid_str = "SRID=%d" % self.srid
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point_str = "POINT(%f %f)" % tuple(reversed(data_list))
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return ";".join([srid_str, point_str])
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return None
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