[Chameleon] Custom Query Widget

[Paul Spencer]

Eric,

there is no way to affect the priority of a widget except by editing it 
at the php level.  The rationale behind this is that some widgets are 
designed to operate at a certain priority level and will fail if an 
inappropriate value is used.

In checking the code, the XMLThemeLegend is already set to PRIORITY_MEDIUM.

Cheers,

Paul

Eric Bridger wrote:
> Paul,
> This made perfect sense to me and was exactly what I needed!  Thank-you,
> thank-you, thank-you.
> My custom query widget is working perfectly now. I knew I should have
> checked with you first.
> 
> Setting PRIORITY in my custom widgets was easy (which handled this case)
> but can I pass a PRIORITY to an abitrary widget, e.g. XMLThemeLegend?
> Would the syntax just be: priority="PRIORITY_MEDIUM".
> 
> Thanks again.
> 
> Eric
> 
> 
> On Thu, 2005-01-13 at 07:43, Paul Spencer wrote:
> 
>>Eric,
>>
>>I assume you are willing to write a widget for this, or modify an 
>>existing one.  There are a couple of widgets in Chameleon that do 
>>something similar, i.e. they change the map obj while the app is 
>>executing.  The trick is mostly in timing, which is what widget 
>>priorities are for :)
>>
>>Note: Widgets are not supposed to use values gathered from ProcessURL 
>>for drawing, they are supposed to wait until all widgets have finished 
>>processing.  There have been some bugs related to this that I have fixed 
>>as they were found, but it is possible that some widgets are still 
>>violating this principle.
>>
>>So, your widget can be set to either the highest priority (it gets run 
>>first) or lowest (it gets run last).  Lowest will expose bugs related to 
>>the note above, highest will avoid them.
>>
>>My approach to this would be to have a highest priority widget, it can 
>>do the query and then set the form variable used by the time widget.  As 
>>long as the new query widget runs before the time widget, you should be 
>>fine.  The time widget should see time coming in the various form 
>>variables and update the layer sources as if the user had entered the 
>>time themselves.
>>
>>Don't know if that makes sense ... it does to me :)
>>
>>Cheers,
>>
>>Paul
> 
>  
> 
> 

-- 
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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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