Google Maps is great, but some hacks are needed

27 Mar, 2007 JavaScript, API

I’m currently working on an AJAX-driven site also using Google Maps’ externally accessible API. But I have as several others been frustrated about the fact, that the GMarkerManager-class does not contain a clearMarkers method. So I combined the open-sourced source with the latest closed-source release, and mashed stuff up like this:

JAVASCRIPT:
// hack GMarkerManager to contain a method for clearing all markers
GMarkerManager.prototype.clearMarkers = function() {
    var me = this;
    //
    // clear currently shown
    if (me.Wd > 0) {
        me.Id(me.K, me.Kd);
    }
    //
    // reset arrays
    var maxZoom = me.df;
    var maxWidth = 256;
    for (var zoom = 0; zoom < maxZoom; ++zoom){
        me.ed[zoom] = [];
        me.oc[zoom] = 0;
        me.gc[zoom] = Math.ceil(maxWidth/me.Ec);
        maxWidth <<= 1;
     }
    me.refresh();
} 