Advanced usage

{% leaflet_map %} tag parameters

• callback: javascript function name for initialization callback. (Default: None).
• fitextent: control if map initial view shoud be set to extent setting. (Default: True). Setting fixextent to False will prevent view reset and scale controls to be added.
• creatediv: control if the leaflet map tags creates a new div or not. (Default: True). Useful to put the javascript code in the header or footer instead of the body of the html document. If used, do not forget to create the div manually.
• loadevent: One or more space-separated window events that trigger map initialization. (Default: load, i.e. all page resources loaded). If empty values is provided, then map initialization is immediate. And with a wrong value, the map is never initialized. :)
• settings_overrides: Map with overrides to the default LEAFLET_CONFIG settings. (Default: {}).

Config overrides

It is possible to dynamically override settings in LeafletWidget init:

from leaflet.forms.widgets import LeafletWidget


class WeatherStationForm(forms.ModelForm):

    class Meta:
        model = WeatherStation
        fields = ('name', 'geom')
        widgets = {'geom': LeafletWidget(attrs={
            'settings_overrides': {
                'DEFAULT_CENTER': (6.0, 45.0),
            }
        })}

For overriding the settings in LeafletGeoAdmin, use set the appropriate property:

class WeatherStationAdminAdmin(LeafletGeoAdmin):
    settings_overrides = {
       'DEFAULT_CENTER': (6.0, 45.0),
    }

Projection

It is possible to setup the map spatial reference in LEAFLET_CONFIG:

'SRID': 2154  # See http://spatialreference.org

Additional parameter is required to compute scale levels : the tiles extent in local projection:

'TILES_EXTENT': [924861,6375196,985649,6448688],

For more information, have a look at this example.

Example of TileCache configuration compatible with Leaflet:

[scan-portrait]
type=WMSLayer
layers=scan100,scan25
url=http://server/wms?
extension=jpg
tms_type=google
srs=EPSG:2154
bbox=924861,6375196,985649,6448688

[cache]
type=GoogleDisk
expire=2592000
base=/tmp/tiles

By default, django-leaflet will try to load the spatial reference from your static files at “proj4js/{{ srid }}.js”. If it fails, it will eventually rely on spatialreference.org.