[OpenLayers-Users] understanding how to handle click events

[Daniel Carvalho]

Hi!
the way OpenLayers handles click events is more complicated than I was
expecting.

So I ask someone to comment this code:
(based on http://openlayers.org/dev/examples/click.html )

(and how it relates to class OpenLayers.Event? )


MyClick = OpenLayers.Class(OpenLayers.Control, {
    defaultHandlerOptions: {
        'single': true,
        'double': false,
        'pixelTolerance': 0,
        'stopSingle': false,
        'stopDouble': false
    },

    initialize: function(options) {
        this.handlerOptions = OpenLayers.Util.extend(
            {}, this.defaultHandlerOptions
        );
        OpenLayers.Control.prototype.initialize.apply(
            this, arguments
        );
        this.handler = new OpenLayers.Handler.Click(
            this, {
                'click': this.trigger
            }, this.handlerOptions
        );
    },

    trigger: function(e) {
        var lonlat = map.getLonLatFromViewPortPx(e.xy);
        alert("You clicked near " + lonlat.lat + " N, " +
                                  + lonlat.lon + " E");
    }

});
var map;
function init(){
    map = new OpenLayers.Map('map');

    var ol_wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
        "http://vmap0.tiles.osgeo.org/wms/vmap0?";, {layers: 'basic'} );


    map.addLayers([ol_wms]);
    map.zoomToMaxExtent();

    var click = new MyClick();
    map.addControl(click);
    click.activate();

}

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