On Sun, Sep 11, 2011 at 8:48 AM, Mr. Puneet Kishor <[email protected]> wrote: > > On Sep 11, 2011, at 8:03 AM, Richard Greenwood wrote: > >> On Sat, Sep 10, 2011 at 1:35 PM, Mr. Puneet Kishor <[email protected]> >> wrote: >>> Now that I have mode=tile working with Google Maps API v3, I am on my way >>> to implement querying like so >>> >>> 0. Bind an infowindow.close() to a click event listener on the map >>> 1. Bind an infowindow.open() to a click event listener on the MapServer >>> layer >>> 2. Fill the infowindow content with the result from an Ajax query to >>> MapServer >>> 3. When the user clicks on the MapServer layer, the Ajax query is fired >>> 4. MapServer responds with the query result as a JSON object >>> 5. Fill the infowindow with the JSON result >>> 6. Close any already open infowindow via #0 above >>> 7. Open a new infowindow with the result >>> >>> Is the general approach outlined above sound? Any pointers to existing code >>> samples for the above? >> >> >> Puneet, >> >> I'm doing pretty much that here: >> http://records.sublettewyo.com/mapserver/map.html >> I'm using jQuery in this example and putting the info into a jQuery >> dialog, however I have used a standard browser window in the past. >> Only thing is that I don't thinnk you really need step 0, simply >> replace the contents of the container with the new info. > > > Yup, I don't have to worry about #0. Howerver, #1 above is problematic, and I > don't have a resolution for it yet. Seems like in Google Maps API v3 I can't > addListener to an ImageMapType overlay. See, I am adding a MapServer layer as > ImageMapType overlay like so > > "mapserverLayer" : new google.maps.ImageMapType({ .. }) > map.overlayMapTypes.insertAt(0, mapserverLayer); > > > If I do the following -- > > google.maps.event.addListener(map, "click", function (event) { } > > it works, however, the following doesn't work at all > > google.maps.event.addListener(mapserverLayer, "click", function (event) { } > > Which is silly, isn't it? I don't want the entire map to be listening to the > "click" events. I just want the MapServer layer to be doing so. Haven't yet > found a resolution to this. > > >> >> Also, if your data is in PostGIS you can skip mapserver for attribute >> queries and do an info query against the PostGIS db via PHP or other >> server-side tool. >> > > Ok, I am very interested in the above, but I am not sure I understand you. > For the most part, I want to click on the map, and find out more about what I > clicked on. In order to do that query via Perl MapScript (I don't know PHP) > and Pg, I would need to create the $mapObj. I am able to do that fine, but I > don't know how to run MapServer in `mode=tile` via MapScript. This is the > question I have asked a couple of times -- if I have a pure MapScript app (no > map files involved at all, which is what I want), how no earth do I tell the > app to use `mode=tile`? > > Puneet. > >
Puneet, I do not know how to bind an infowindow.open() to a click event listener on the MapServer layer (#1 above) because I do not use the Google API. But using Perl, PHP or whatever it is easy to query a PostGIS database, and even get GeoJSON back should you want to highlight the selected object on the map. I am using OpenLayers so I can easily convert the mouse click (or box) to a real-world coordinate(s). I pass the point or box to a PHP page which connects to a PostGIS db, does the query, and returns JSON. Does that help? I'm not sure that I understand everything that you're doing and maybe my approach is not appropriate in your case. Are you in Denver for FOSS4G?? Rich -- Richard Greenwood [email protected] www.greenwoodmap.com _______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
