blechreiz-website/location_field/widgets.py

from django.forms import widgets
from django.utils.safestring import mark_safe

class LocationWidget(widgets.TextInput):
    def __init__(self, attrs=None, based_field=None, zoom=None, width=610, height = 480, **kwargs):
        self.based_field = based_field
        self.zoom = zoom
        self.width = width
        self.height = height
        super(LocationWidget, self).__init__(attrs)

    def render(self, name, value, attrs=None):
        if value is not None:
            lat, lng, zoom = value.split(',')
                
            value = '%s,%s,%d' % (
                float(lat),
                float(lng),
                float(zoom)
            )
        else:
            value = ''

        based_field = "#id_" + self.based_field.name
         
        attrs = attrs or {}
        attrs['data-location-widget'] = name
        attrs['data-based-field'] = based_field
        attrs['data-zoom'] = self.zoom
        attrs['data-map'] = '#map_' + name

        text_input = super(LocationWidget, self).render(name, value, attrs)

        map_div = u'''
                     <div style="margin:4px 0 0 0">   <label></label>
                     <div id="map_%(name)s" style="width: %(width)dpx; height: %(height)dpx"></div>
                     </div>
                     '''

        return mark_safe(text_input + map_div % {'name': name, 'width': self.width, 'height': self.height })

    class Media:
        # Use schemaless URL so it works with both, http and https websites
        js = (
            '//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js', # jquery
            '//maps.google.com/maps/api/js?sensor=false&language=de',
            '/static/js/bindWithDelay.js',
            '/location_field/media/form.js',
        )