[mapguide-users] Re: Tooltip - Display info from all (above) map layers

ddriver drunkdriv3r at gmail.com
Mon Oct 17 03:22:46 EDT 2011

I'm not sure how I would do that... but I found, in the file
ajaxmappane.templ that the tooltip gets displayed within the
function DisplayHyperlinkTip().

The actual tooltip info is stored in the hlData object: hlData.ttip,

which gets its value from xmlIn.getElementsByTagName("Tooltip")[0] , (the
value of the first element in the XML having the tag Tooltip ) in the
function ProcessFeatureInfo(),

which in turn gets called by the function QueryFeatureInfo(), where it all
comes down to.

In this function, QueryFeatureInfo(), there is a request sent which returns
an XML containing the tooltip info. Here's the code:

function QueryFeatureInfo(geom, append, maxfeatures, which)
if(GetVisSelLayers() == "") return;
    var reqParams ;
encodeURIComponent(mapName) + "&SESSION=" + sessionId + "&SEQ=" +
Math.random() + "&LAYERNAMES=" + encodeURIComponent(GetVisSelLayers()) +
    if(maxfeatures != 0)
        reqParams += "&MAXFEATURES=" + maxfeatures;
    var selRequest = CreateRequestHandler();
    selRequest.open("POST", webAgent, false);
        ProcessFeatureInfo(selRequest.responseXML.documentElement, append,
        RequestFailed("No response");

I was wondering if I could change something here that would get the results
I need (display the tooltip info from all visible and selectable layers, not
just the current layer). Something like the parameters used to
call QUERYMAPFEATURES? So that in the returned XML, I would have more
Tooltip elements that I'd concatenate in ProcessFeatureInfo(). I also tried
to find the code for the QUERYMAPFEATURES code thinking I could find
something useful there, but had no luck... does anybody know where I could
find that code?


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