[mapserver-users] Clickable label

[Rahkonen Jukka (Tike)]

Hi,

Andrea Aime implemented a system like that into Geoserver a month ago
http://sourceforge.net/mailarchive/forum.php?thread_name=etPan.52b0c830.643c9869.aef%40Liberi.local&forum_name=geoserver-devel

Perhaps that can give some inspiration.

-Jukka Rahkonen-

Basques, Bob (CI-StPaul) wrote:
> 
> Steve,
> 
> I've been thinking on this thread since it started, I wonder, could you use a
> imagemap template from Mapserver, but populate it with the Label bounding
> polygons?
> 
> bobb
> 
> 
> ________________________________________
> From: mapserver-users-bounces at lists.osgeo.org [mapserver-users-
> bounces at lists.osgeo.org] on behalf of Lime, Steve D (MNIT)
> [Steve.Lime at state.mn.us]
> Sent: Friday, January 10, 2014 4:14 PM
> To: wiltomap; mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] Clickable label
> 
>  This can't be done with stock MapServer. Labels are dynamic by nature and are
> the product of a map raw while queries work off the base data. The bridge
> between the map and a query is a conversion from pixels to map coordinates
> based on map size and extent.
> 
> You might be able to pull this off using MapScript. For a query you'd have to do
> things in two stages:
> 
>   1) Draw the map (in memory) based on the map the user interacted with (same
> extent, size and set of layers) so that a label cache is created.
>   2) Search the label cache based on the query point and based on that pull the
> appropriate feature.
> 
> I don't know if step 2 is feasible or not. You used to be able to loop through it,
> not sure about now.
> 
> There might be other ways using an image where you render text and label
> backgrounds using the same color, a color that you could map back to a feature
> id. The map would basically contain label polygons in a raster you could, in turn,
> query that raster using point and retrieve a feature id. I have doubts that you
> could match the first image to the second so this would be a huge long shot.
> 
> Steve
> 
> -----Original Message-----
> From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-
> bounces at lists.osgeo.org] On Behalf Of wiltomap
> Sent: Friday, January 10, 2014 2:17 AM
> To: mapserver-users at lists.osgeo.org
> Subject: [mapserver-users] Clickable label
> 
> Hello all,
> 
> I have to display labels instead of points on a layer. The labels rely on an
> attribute value. I would like to click on the label to make an attribute windows
> open up. So far, no problem with mapfile configuration...
> 
> The only thing is that the attribute window opens up when I click right in the
> middle of the label. I can use TOLERANCEUNITS and TOLERANCE parameters in
> the mapfile to enlarge the clickable area BUT this means that I can also click
> next to the label and get the attribute window, which I don't want to...
> 
> My purpose is to get the attribute window whereever I click on the label (any
> part of it) and not if I click next to it. Would you think about a solution to that ?
> 
> I enclose a scrennshot of the mapfile I have worked out so far.
> 
> 
> Many thanks in advance,
> 
> Thomas
> 
> 
> <http://osgeo-org.1560.x6.nabble.com/file/n5097281/mapfile_label.jpg>
> 
> 
> 
> --
> View this message in context: http://osgeo-org.1560.x6.nabble.com/Clickable-
> label-tp5097281.html
> Sent from the Mapserver - User mailing list archive at Nabble.com.
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