core.cljs

    om/IRenderState
    (render-state
     [this {:keys [move toggle
                   google-map directions-renderer
                   center directions poi-visible]}]
     ;; any diffs to the DOM are handled automatically by React,
     ;; but we have to manually diff the parts of the Google Maps state that we are managing:
     (when (:dirty center)
       (.panTo google-map (:data center)))
     (when (:dirty directions)
       (.setDirections directions-renderer (:data directions)))
     (when (:dirty poi-visible)
       (toggle-poi-layer owner))
     (update-markers (:points app) owner)