[Chameleon] ROI Widget

[Paul Spencer]

further to this, a WMC requires WMS layers so you would need to save  
the ROI into a new layer in a map file that is exposed as a WMS  
server.  This would not allow you to restore real state either, since  
a WMS is just a picture of the data, not the data itself.  That would  
require a WFS ...

All in all, its not ideal to use WMC for this.

Cheers

Paul

On 24-Oct-05, at 7:55 PM, Delfos, Jacob wrote:

> Hi Derek,
>
> I don't think there is currently any support for restoring a session,
> although I imagine it could be done. If you managed to restore the
> complete session, your ROI objects would be in it too, since they are
> stored in the session. Other than that Chameleon doesn't allow you to
> save ROI objects.
>
> I created a tool a while ago which converts the existing ROI  
> objects to
> shapefiles, and adds them as a layer to the map. The shapefile is also
> stored in the session directory, so could also be restored if you were
> to save the whole directory. But this may not be what you want...
>
> I can actually see the use of a session being restored when a user
> returns. Cookies could be used to help do this....
>
> Regards,
>
> Jacob
>
>
>
>
>> -----Original Message-----
>> From: chameleon-bounces at lists.maptools.org
>> [mailto:chameleon-bounces at lists.maptools.org] On Behalf Of Bird,  
>> Derek
>> Sent: 24 October 2005 21:04
>> To: Bart van den Eijnden; chameleon at lists.maptools.org
>> Subject: RE: [Chameleon] ROI Widget
>>
>> Hi,
>>
>> What I wanted was a way to capture all of the layers, current
>> zoom etc,
>> including the ROI layers in a single file that could be stored in a
>> database, so I can "bring up" that past snapshot ...
>>
>> Since the ROI stuff only seems to be client side, that makes it more
>> difficult. Even if there was a way to take a snapshot of all
>> of the ROI
>> stuff, store it in a database and be able to redraw all of
>> the ROI in a
>> second call would also be fine. From what I have seen on the
>> API for the
>> ROI widgets there does not seems to be a "save state" "load
>> state" call.
>>
>> Thanks for your help,
>> Derek
>>
>> -----Original Message-----
>> From: Bart van den Eijnden [mailto:bartvde at xs4all.nl]
>> Sent: Saturday, October 22, 2005 12:11 PM
>> To: Bird, Derek; chameleon at lists.maptools.org
>> Subject: Re: [Chameleon] ROI Widget
>>
>> Derek,
>>
>> I don't get what you want.
>>
>> A WMC file is just an application state, so which layers are
>> on and off,
>> and which extent was visible in the map.
>>
>> What does this have to do with ROI shapes? Or do you mean
>> converting ROI
>> into GML by any chance?
>>
>> Best regards,
>> Bart
>>
>> On Fri, 21 Oct 2005 22:23:00 +0200, Bird, Derek  
>> <Derek.Bird at xwave.com>
>> wrote:
>>
>>
>>> Hello,
>>> I would like to know if there is any examples of converting
>>>
>> all of the
>>
>>
>>> ROI shapes to a WMS Context file?
>>> Thanks,
>>> Derek
>>>
>>
>>
>>
>> --
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>>
>>
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>
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|Paul Spencer                           pspencer at dmsolutions.ca   |
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|Applications & Software Development                              |
|DM Solutions Group Inc                 http://www.dmsolutions.ca/|
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