JS Maps v3: custom marker with user profile picture

Question

I am struggling since 2 days with something I was thinking easy, on a map, I have to display a marker for each user with the user FB profile picture inside.

Answer 1

This answer assumes you already have the URIs for the facebook profile images. Honestly, it feels there is an easier way, but I found some code that shows how to create a custom marker with custom HTML elements and I went from there. From there's it's pretty easy to create a custom marker that accepts a image URI as a parameter. From the original, I just added an imageSrc parameter, moved the styling outside the code by attaching a class name to the new div. In terms of html and css, I just appended an image with the passed image URI into the div, and just added some CSS to make it look like what you have.

Demo

So the javascript code looks something like this:

function CustomMarker(latlng, map, imageSrc) { 
    this.latlng_ = latlng;
    this.imageSrc = imageSrc; //added imageSrc
    this.setMap(map);
}

CustomMarker.prototype = new google.maps.OverlayView();

CustomMarker.prototype.draw = function () {
    // Check if the div has been created.
    var div = this.div_;
    if (!div) {
        // Create a overlay text DIV
        div = this.div_ = document.createElement('div');
        // Create the DIV representing our CustomMarker
        div.className = "customMarker" //replaced styles with className

        var img = document.createElement("img");
        img.src = this.imageSrc; //attach passed image uri
        div.appendChild(img);
        google.maps.event.addDomListener(div, "click", function (event) {
            google.maps.event.trigger(me, "click");
        });

        // Then add the overlay to the DOM
        var panes = this.getPanes();
        panes.overlayImage.appendChild(div);
    }

    // Position the overlay 
    var point = this.getProjection().fromLatLngToDivPixel(this.latlng_);
    if (point) {
        div.style.left = point.x + 'px';
        div.style.top = point.y + 'px';
    }
};

CustomMarker.prototype.remove = function () {
    // Check if the overlay was on the map and needs to be removed.
    if (this.div_) {
        this.div_.parentNode.removeChild(this.div_);
        this.div_ = null;
    }
};

CustomMarker.prototype.getPosition = function () {
    return this.latlng_;
};

I think I added only one or two lines here. You can just add this to your page I think. With this in place you can just style the container as normal, and it should apply to all the custom markers. You can add elements and classes as you see fit to achieve the look you are looking for. But for completion's sake I added the styles I used for the demo here.

.customMarker {   /* the marker div */
    position:absolute;
    cursor:pointer;
    background:#424242;
    width:100px;
    height:100px;

    /* we'll offset the div so that
       the point passed doesn't end up at
       the upper left corner but at the bottom
       middle. so we'll move it left by width/2 and
       up by height+arrow-height */
    margin-left:-50px;  
    margin-top:-110px;
    border-radius:10px;
    padding:0px;
}
.customMarker:after { //triangle
    content:"";
    position: absolute;
    bottom: -10px;
    left: 40px;
    border-width: 10px 10px 0;
    border-style: solid;
    border-color: #424242 transparent;
    display: block;
    width: 0;
}
.customMarker img { //profile image
    width:90px;
    height:90px;
    margin:5px;
    border-radius:2px;
}

And for the demo I have some sample data in array and placed them on the map using a for loop.

var data = [{
    profileImage: "http://domain.com/image1.jpg",
    pos: [37.77, -122.41],
}, {
    profileImage: "http://domain.com/image2.jpg",
    pos: [37.77, -122.41],
}]

for(var i=0;i<data.length;i++){
   new CustomMarker(
      new google.maps.LatLng(data[i].pos[0],data[i].pos[1]),
      map,
      data[i].profileImage
   )
}

I hope that helps.