[mapguide-users] Highlight selections problem

Thu Aug 6 11:36:00 EDT 2009

Hi Jo,
I thinks that your problem is with your database. does your table containing
the geometries have primary key and spatial indexs? 

regards,

Jo Cook wrote:
> 
> Dear All,
> 
> I have the fairly common problem of wanting to pick a feature from a
> database and have the map automatically zoom to the correct location and
> highlight the feature. I am doing this in php and javascript (MGOS 2.1
> with bundled apache configuration), following some extremely helpful code
> snippets I found in the forum. Thanks!
> 
> I have now got stuck at the point where a lot of other people seem to get
> stuck, namely that the map zooms to the correct location and shows in the
> status bar that one feature is selected, but the feature doesn't show up
> as highlighted. I understand, from trawling the forum, that I need to save
> and refresh in order to highlight the feature.
> 
> The only problem is that I have tried many combinations of map save and
> selection save, and have looked in the api documentation, and tried
> figuring out where in my code it needs to go, and nothing seems to work,
> and now I'm horribly confused as to which of these I am supposed to be
> using. Am I saving a selection, or saving a map? 
> 
> This is the relevant section of php:
> 
> 	    $resourceSrvc =
> $siteConn->CreateService(MgServiceType::ResourceService);
> 	    $map = new MgMap();
> 	    $resId = new
> MgResourceIdentifier("Library://maps/map1.MapDefinition");
> 	    $mapName = $resId->GetName();
> 	    $map->Create($resourceSrvc, $resId, $mapName);
> 
> 			    
> 	    $layers = $map->GetLayers();
> 	    $selLayer = $layers->GetItem($SMAlayer);
> 		$featureResourceId = new
> MgResourceIdentifier($selLayer->GetFeatureSourceId());
> 		$featureClassName = $selLayer->GetFeatureClassName();
> 		
> 	   
> 		$filter = "site_code = '$SMAlocation'"; 
> 		
> 		$queryOptions = new MgFeatureQueryOptions(); 
> 		$queryOptions->SetFilter($filter); 
> 	   
> 	    $featureSrvc =
> $siteConn->CreateService(MgServiceType::FeatureService);
> 	    $featureReader = $featureSrvc->SelectFeatures($featureResourceId,
> $featureClassName, $queryOptions);
> 	                         
> 	    $selection = new MgSelection($map);
> 		$selection->AddFeatures($selLayer, $featureReader, 1);
> 		$selectionXml = $selection->ToXml();
> 		$selection->Save($resourceSrvc, $mapName);
> 
> Then this is the javascript
> 
> <SCRIPT LANGUAGE="JavaScript">
> 
> var initTimer;
> 
> function InitDocument()
> 	{
>      //wait for map to be fully initialized
>      //then call the initial function 
>    	 initTimer = setInterval(DelayedInit, 200); 
> 	 
> 	 }
>  
>  function DelayedInit() {
>         try {
>           if(parent.ViewerFrame.mapFrame.mapInit) {
>            clearInterval(initTimer);
>            parent.ViewerFrame.mapFrame.ZoomToView(<?php echo $centerX; ?>,
> <?php echo $centerY; ?>, 2000, true);
> 			var selectionXml = '<?php echo $selectionXml; ?>';
> 			parent.ViewerFrame.mapFrame.SetSelectionXML(selectionXml);
> 			parent.ViewerFrame.mapFrame.ExecuteMapAction(1);
> 			parent.ViewerFrame.mapFrame.Refresh();
> 			            
>         }
>     }
>      catch(e) {}
>  }
> 
> </SCRIPT>
>   
> </HEAD>
> 
> <BODY onLoad="InitDocument()">
> 
> 
> </BODY>
> </HTML>
> 
> 
> This doesn't work, but doesn't seem to throw up any errors. Any help would
> be very much appreciated! To reiterate, I have searched the documentation
> and forums, but remain confused...
> 
> Thanks
> 
> Jo
> -- 
> -----------------------------------------------------
> Joanne Cook
> Senior IT Support and Development
> Oxford Archaeology (North)
> 01524 880212
> http://thehumanjourney.net
> 
> 
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> 
> 

-----
Rodolfo Moreno
CivilEng

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