Ok. I figured out the cause of the problem below, but I don't know the solution
--
On Oct 17, 2011, at 5:06 PM, Puneet Kishor wrote:
> I am registering an click event to the map
>
> map.events.register("click", map, popUp);
>
> Then querying the db for the feature at the point of click
>
> popUp: function(e) {
>
> // From google to latlng
> var lonlat = map.getLonLatFromViewPortPx(e.xy).transform(
> proj.google,
> proj.latlng
> );
>
> $.ajax({
> url: "http://server/feature.json";,
> data: {lng: lonlat.lon, lat: lonlat.lat},
> type: "GET",
> dataType: "jsonp",
> success: function(data) {
> var html = unravel_data(data);
> var c = map.getLonLatFromViewPortPx(e.xy);
>
> map.addPopup(
> new OpenLayers.Popup.Framed(
> "featurePopup",
> new OpenLayers.LonLat(c.lon, c.lat),
> new OpenLayers.Size(200, 150),
> html,
> null,
> false,
> null
> )
> );
> }
> });
> }
>
> But, instead of the popup, I get the following in my console
>
> OpenLayers.js: 2367: TypeError: 'null' is not an object (evaluating
> 'this.positionBlocks[this.relativePosition]')
>
> Note that I want a popup without a marker or a vector feature. So, I have two
> questions --
>
I believe, in order to have a Framed popup, I need to pass in an anchor which,
per the docs, "must expose a ‘size’ OpenLayers.Size and ‘offset’
OpenLayers.Pixel (generally an OpenLayers.Icon)."
If I change the above to just `new OpenLayers.Popup()` then it works fine, but
that is not what I want. How do I draw an Framed or FramedCloud popup without
creating an icon? I simply want to click on a polygon and create a popup
anchored to the point of click.
> 1. How can I successfully draw the above popup?
> 2. Can I register the event to a layer instead of to the map? The reason is,
> this particular layer doesn't cover the entire map, so I want the feature
> query to be performed only when the user clicks on the layer.
>
> --
> Puneet Kishor
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