Simplify customizing LeafletWidget map

If you need to customize the map used by the widget, currently you need to override the js field behaviour by extending GeometryField, then in django you subclass the LeafletWidget to specify the custom geometry_field_class, as follows:

YourGeometryField = L.GeometryField.extend({
    addTo: function (map) {
        L.GeometryField.prototype.addTo.call(this, map);
        // Customize map for field
        console.log(this);
    },
    // See GeometryField source (static/leaflet/leaflet.forms.js) to override more stuff...
});

class YourMapWidget(LeafletWidget):
    geometry_field_class = 'YourGeometryField'

class YourForm(forms.ModelForm):
    class Meta:
        model = YourModel
        fields = ('name', 'geom')
        widgets = {'geom': YourMapWidget()}

A shortcut would be useful to pass the geometry_field_class to the form instead of having to subclass LeafletWidget.

makinacorpus / django-leaflet

Simplify customizing LeafletWidget map #80