[fusion-users] Problem with layer hiding and showing.

Wed Aug 6 06:57:09 EDT 2008

the "ShowLayers" parameter in the "GETMAPIMAGE" call, can take multiple 
GUIDs, so you should send:
SHOWLAYERS=118e0096-0000-1000-8000-001b2418ab2d,1192c52c-0000-1000-8000-001b2418ab2d,119062dc-0000-1000-8000-001b2418ab2d

Regards, Kenneth Skovhede, GEOGRAF A/S


Tómas Guðmundsson skrev:
> Mike, all.
>
> With some debugging this is what I find:
>
> console.log('showing :', group.layers[j], ' - ', group.layers[j].layerName);
> showing : Object uniqueId=118e0096-0000-1000-8000-001b2418ab2d - HV_loki
> showing : Object uniqueId=1192c52c-0000-1000-8000-001b2418ab2d - HV_brunnar
> showing : Object uniqueId=119062dc-0000-1000-8000-001b2418ab2d - HV_lagnir
>
> This is normal, this is what it should do. And this is printed out when each layer 
> calls a method "layer.show()". Now, there is only one mapagent call that displays 
> this.
>
> clientagent	Fusion Viewer
> showLayers	119062dc-0000-1000-8000-001b2418ab2d
> operation	GETMAPIMAGE
>
> And evidently on my map, the only layer that get's displayed is HV_lagnir. If I change 
> the order, the last one always appears. However, the legend and "group.layers[j].visible" 
> all result in true. It would be kind of silly to wait for 3 images to display 3 layers, 
> so I'm wondering how this can be solved. 
>
> Regards,
> Tómas
>
> -----Original Message-----
> From: fusion-users-bounces at lists.osgeo.org [mailto:fusion-users-bounces at lists.osgeo.org] On Behalf Of Tómas Guðmundsson
> Sent: 6. ágúst 2008 09:05
> To: Mike Adair
> Cc: fusion-users at lists.osgeo.org
> Subject: RE: [fusion-users] Problem with layer hiding and showing.
>
> Mike,
>
> I'm afraid that all I found was the 'showlayers' parameter. And it 
> was some kind of a hash,
>
> clientagent	Fusion Viewer
> showLayers	0f682be6-0000-1000-8000-001b2418ab2d
> operation	GETMAPIMAGE
>
> I don't quite know how to decrypt that but any help would be appreciated.
>
> F.y.i. this is the kind of hash that would be correct with the layers
> appropriately displayed.
>
> clientagent	Fusion Viewer
> showLayers	0f65c98c-0000-1000-8000-001b2418ab2d
> operation	GETMAPIMAGE
>
> The delta is only in the first part.
>
> Regards,
> Tómas.
>
> -----Original Message-----
> From: Mike Adair [mailto:madair at dmsolutions.ca] 
> Sent: 5. ágúst 2008 19:20
> To: Tómas Guðmundsson
> Cc: fusion-users at lists.osgeo.org
> Subject: Re: [fusion-users] Problem with layer hiding and showing.
>
> Tomas,
>
> You should check the value of the 'showlayers' and 'hidelayers' 
> parameters in the sequence of mapagent calls to GETMAPIMAGE. Those are 
> the parameters that turn layers on or off. If they are what you are 
> expecting, then it's possible that there is a problem with specifying 
> those params, e.g. they should be comma-separated and they are not, or 
> vice versa.
>
> Mike
>
> Tómas Guðmundsson wrote:
>   
>> Sorry about that. Everything about "If I do nothing else but reload 
>> the map (i.e. pan the map, zoom or refresh it) the correct layers are 
>> displayed on the map (all 3 or none at all).
>>
>> So I figure this has something to do with timing or something like 
>> that, of the fetching of the map itself?"
>>
>> Is wrong. So ignore that.
>>
>> Rgds.
>>
>> Tómas
>>
>> *From:* fusion-users-bounces at lists.osgeo.org 
>> [mailto:fusion-users-bounces at lists.osgeo.org] *On Behalf Of *Tómas 
>> Guðmundsson
>> *Sent:* 5. ágúst 2008 13:36
>> *To:* fusion-users at lists.osgeo.org
>> *Subject:* [fusion-users] Problem with layer hiding and showing.
>>
>> Hi all.
>>
>> I currently have function that I am using that systematically goes 
>> through an array it's passed and walks through the layer legend to see 
>> if it finds a layer. So for every layername in a layerarray, I check 
>> if that layer exists and then if the checkbox is checked I show it, 
>> else I hide it. Now I've been debugging this and for an array of 3 
>> layers (this also happens for layers more than 1), I get 3 times the 
>> debug message "showing layer", when I check the checkbox again I get 
>> the debug message "hiding layer" 3 times as well.
>>
>> So I know this is working properly, however Mapguide Server does not 
>> think so. Or at least the images I get back from the server are 
>> missing one layer (the first one, every time). So according to the 
>> legend all 3 layers are visible. However, the map shows everyone 
>> except the first one. Now I figured this was weird, especially since 
>> when I try to hide them, they all are hidden except the first one 
>> which is now visible. And now for the final twist.
>>
>> If I do nothing else but reload the map (i.e. pan the map, zoom or 
>> refresh it) the correct layers are displayed on the map (all 3 or none 
>> at all).
>>
>> So I figure this has something to do with timing or something like 
>> that, of the fetching of the map itself?
>>
>> Please let me know if this is not clear to you and I'll try to explain 
>> better, but I find it weird I can not hide more than 2 layers at a time.
>>
>> Kind regards,
>>
>> Tómas
>>
>> ------------------------------------------------------------------------
>>
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>>   
>>     
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