Proximity updates based on map movement

[keyofj]

When the MapboxGeocoder is initialized we can set the proximity based on the current map center point. It would be nice to be able to have this updated based on where the user has the map when they do subsequent searches. Not automatic though, I think it should be set as needed to not interfere with specific user experiences.

In our case if someone returns to a saved map they were working on in Dallas, the initial proximity works well if they want to search around Texas. If they jump over to California to work in the map, search results would be returned relative to that current area.

[andrewharvey]

what about a geocoder.setProximity(proximity) method which would then allow this to be implemented in the application code with:

map.on('moveend', function() {
   geocoder.setProximity(map.getCenter());
})

[tristen]

what about a geocoder.setProximity(proximity) method

That sounds like a good addition.

[andrewharvey]

I've merged #122 which now let's you implement this with:

map.on('load', updateGeocoderProximity); // set proximity on map load
map.on('moveend', updateGeocoderProximity); // and then update proximity each time the map moves

function updateGeocoderProximity() {
    if (map.getZoom() > 9) { // proximity is designed for local scale, if the user is looking at the whole world, it doesn't make sense to factor in the arbitrary centre of the map
        var center = map.getCenter().wrap();
        geocoder.setProximity({ longitude: center.lng, latitude: center.lat });
    } else {
        geocoder.setProximity(null);
    }
}

I'm leaving this issue open to track automatically doing this by passing a trackProximity: true option.

[siddmegadeth]

but how to update geocoder search box on mapmove event

[andrewharvey]

but how to update geocoder search box on mapmove event

@siddmegadeth could you elaborate?