AngularUI: Handling Mouseover Events for Google Maps Markers

The Problem:

It took me a while to figure this out, so I thought the issue deserved its own blog post. I found myself confused when trying to hook up mouseover events with Google Map markers using AngularUI. The documentation was vague on this matter, stating that it is only supported for a single marker and not for multiple markers.

For a single marker, it's straightforward to specify a directive with an events property in the HTML:

<ui-gmap-marker events="marker.events"></ui-gmap-marker>

Then in the controller:

$scope.marker = {
  events: {
    mouseover: function (marker, eventName, args) {
      // Callback code here
    },
  },
}

However, the same approach doesn't work for multiple markers. I initially thought I could simply add mouseover events to each marker like so:

markers.push({
  events: {
    mouseover: function (mapModel, eventName, originalEventArgs) {
      console.log("I'd really like to show the info window on mouseover.")
    },
  },
})

My Solution:

To resolve this, add the following to the HTML markers directive:

events="clickEventsObject"

And in the controller:

$scope.clickEventsObject = {
  mouseover: markerMouseOver,
  mouseout: markerMouseOut,
}

function markerMouseOver(marker, e) {
  // Callback code here
}

function markerMouseOut(marker, e) {
  // Callback code here
}

It works! This handler returns a directly-mapped array of the models that belong to the gMarker cluster sent along with the event. If you have any questions, feel free to ask. 😊