[mapguide-users] Set existing layers visible

[Jim O'Leary]

I want to programmatically loop through existing layers in my map and set
them visible and display their label in the layers pane according to some
flag. I know this works with new layers that you programmatically make, but
it doesn't work with existing layers. My code is the same as for new layers:

$layer->SetVisible(true);
$layer->SetLegendLabel($layerName);
$layer->SetDisplayInLegend(true);
$layer->ForceRefresh();
$map->Save($resourceService);

In the case of an existing layer, this code sets the layer visible in the
map, but does not display it in the legend. Adding a JavaScript

mapFrame.Refresh()

does not help. In fact, you don't have to do that with an existing layer, it
becomes visible anyway.

After executing this code, I can call

$visible = $layer->GetDisplayInLegend();
$layerName = $layer->GetName();
print "visible for $layerName is $visible<br>";

...and it shows me that the layer is set as visible in the legend. However,
it does not show up in the legend.

Thanks.

-----
Jim O&#8217;Leary


Technical
Consultant


Pacific Alliance
Technologies

2nd Floor, 24 East 4th Ave, Vancouver
 BC, Canada
V5T1E8

TEL 604.676.6000 TOL 877.691.9171 FAX 604.682.0962 


WEB  http://www.pat.ca/ www.pat.ca 

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