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#1 2011-11-11 17:31:13
- support98
- Member
- Registered: 2011-03-21
- Posts: 11
Coordinates via MouseClick
I have embed a simply osm map in a website with this code:
function init() {
map = new OpenLayers.Map("basicMap");
var mapnik = new OpenLayers.Layer.OSM();
map.addLayer(mapnik);
map.setCenter(new OpenLayers.LonLat(13.41,52.52) // Center of the map
.transform(
new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator Projection
), 15 // Zoom level
);
}
...
<body onload="init();">
<div id="basicMap"></div>
<body>
Now I want that when you click on the map you should get the coordinates of this point. I have found this code:
OpenLayers.Control.Click = 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) {
position = this.map.getLonLatFromViewPortPx(e.xy);
alert("x="+position.x+", y="+position.y);
}
But when I enter this code, I see only a white screen. What is wrong?
Where do I have to enter this code? And I have heard that I have to change some variables. Which and how do I have to name them?
Thanks.
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