OpenLayers add Marker and Popup

Question

I'm having trouble with OpenLayers. My working code is:

<html><body>
  <div id="mapdiv"></div>
  <script src="http://www.openlayers.org/api/OpenLayers.js"></script>
  <script>
    map = new OpenLayers.Map("mapdiv");
    map.addLayer(new OpenLayers.Layer.OSM());

    //var results = new OpenLayers.Layer.Text("My Points", { location:"./checkIns_0_view.txt", projection: map.displayProjection});
    //map.addLayer(results);

    var query = new OpenLayers.LonLat(-122.2928337167, 37.5549570333).transform(new OpenLayers.Projection("EPSG:4326"), map.getProjectionObject());
    var markers = new OpenLayers.Layer.Markers("Markers");
    map.addLayer(markers);
    var size = new OpenLayers.Size(21,25);
    var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
    var icon = new OpenLayers.Icon('http://openlayers.org/dev/img/marker-blue.png', size, offset);
    marker = new OpenLayers.Marker(query, icon);
    markers.addMarker(marker);

    var zoom=16;
    map.setCenter (query, zoom);
  </script>
</body></html>

Now I want to add a Popup with some informations. I tried using several examples, like http://openlayers.org/dev/examples/osm-marker-popup.html. I want to add something like this:

    var popup = new OpenLayers.Popup.FramedCloud("Popup", query, null, "Text", true);
    map.addPopup(popup);

The first line can be compiled, but when I add the second line, the browser doesn't show my map. I think it might have to do with the query-lonLat, but I doesn't have the necessary OpenLayers-skills to find out.

I would appreciate an answer very much.

Greetings

martin jrk martin jrk · Accepted Answer · 2013-06-23T19:15:12

According OpenLayers documentation, you are missing in a popup constructor the anchor parameter between "Text" and true. Probably this is the source of your problem. This parameter has null value in the example for a popup:
```
var popup = new OpenLayers.Popup.FramedCloud("Popup", 
    myLocation.getBounds().getCenterLonLat(), null,
    'We ' +
    'could be here. Or elsewhere.', 
    null,
    true // true if we want a close (X) button, false otherwise
);
```
In Your case you can to use variable icon instead of null value.
In function map.addPopup(popup) you should have second parameter exclusive as well. See OpenLayers documentation dev.openlayers.org/docs/files/OpenLayers/Map-js.html#OpenLayers.Map.addPopup or a definition of this method here. I think it is a good practice to use all defined parameters, because it often creates problems.

Hopefully it will work, after adding all parameters. Your code for a working popup:

var popup = new OpenLayers.Popup.FramedCloud("Popup", query, null, "Text", null, true);
map.addPopup(popup, false);

OpenLayers add Marker and Popup

1 Answers