Amélioration du filtre par distance.

Voir #185

src/agenda_culturel/views.py

@@ -175,16 +175,20 @@ class EventFilter(django_filters.FilterSet):
         ("only_recurrent", "Montrer uniquement les événements récurrents"),
     ]
 
+    DISTANCE_CHOICES = [5, 10, 15, 30]
+
     position = django_filters.ModelChoiceFilter(
         label="À proximité de",
         method="no_filter",
         queryset=ReferenceLocation.objects.all().order_by("-main", "name__unaccent")
     )
 
-    radius = django_filters.NumberFilter(
-        label="Distance maximum (km)",
+    radius = django_filters.ChoiceFilter(
+        label="Dans un rayon de",
         method="no_filter",
-        widget=forms.NumberInput(attrs={"min": "1"})
+        choices=[(x, str(x) + " km") for x in DISTANCE_CHOICES],
+        null_label=None,
+        empty_label=None
     )
 
     exclude_tags = django_filters.MultipleChoiceFilter(