[Chameleon] legend_single_template works delayed

Tue, 25 Nov 2003 16:49:37 +0100

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Hi list

I checked Pauls suggestions for a great deal

===
 > My first guess is that the legend template is somehow
 > processing a different map object than the LayerOrderUp/Down widgets.
 > There are a couple of ways this can happen ... mostly due to how PHP
 > handles references to objects (i.e. it doesn't, it makes copies by
 > default).  This doesn't seem to be the case here, since some other
 > operation will cause the legend to update.

I won't pretend that i understand what exacty happens but how could any
widget change de $oMap object if they all refer to it as

         $oMap = $this->moMapObject->oMap;

They would all operate on a different object.

my imression is that it works out right somehow.

The SelectLayers widget writes a  "selected" metadatatag in de session 
mapfile
I would write a "moved" metadatatag in the sessionmapfile, through a
complete different oMap Object since i created it by

         $oMap = $this->moMapObject->oMap;
and
         $oLayer = $oMap->getLayer($i);

as SelectLayers does it in at a diffent time in a different object and 
function

Both tags appear in the same session mapfile

==

 > It may be a bug in the move functions also.

If the session map file is updated (and it is) i don't see how it could 
be a bug in these functions
 > One way to test if this is
 > a bug would be to write a small script that loads the map, moves a
 > layer
 > then processes the legend template.  I would start there to rule out
 > that possibility.
so i didn't try this other the via the template and chameleon framework

==

 > The next thing to check would be the order of execution of the widgets.
 > In general, all widgets are executed in order of appearance in the
 > template, but widgets can be given a priority that causes them to
 > execute before or after other widgets.  Again, I'm not sure this is the
 > problem because the LegendTemplate widget does not actually process the
 > legend template until DrawPublish.  In the widget cycle, all widgets
 > have ParseURL called, then a second loop calls DrawPublish, so there
 > should be no interaction at this point.
i changed the order of the CWC2 tags and also gave the widgets a high 
priority in the widget constructor, but no effect

==

 >
 > Other than that, I would need to run your code through a debugger to
 > figure out exactly what is going on.
 >

== attachments included

 > Cheers,
 >
Huub

==================================
 > Huub Fleuren wrote:
 >
 > > Hi list,
 > >
 > > I created two new  widgets called LayerOrderDown and LayerOrderUp
 > (based
 > > on the MapUpdateWidget)
 > >
 > > What the ParseURL function does is, loop through the $oMaps Layers
 > list
 > > and if the name is the selected_layer $oMap->moveLayerUp($i)  in the
 > > LayerDown widget and $oMap->moveLayerDown($i)  in the LayerUp widget
 > >
 > > I'm proud to say that this works.
 > >
 > > That is: the map is recreated in the new order, but, there is a delay
 > in
 > > the legend
 > > Only a second /pan/update/zoomin event shows the selected layer in
 > the
 > > new position in the legendlist
 > >
 > > Its like the legend_template uses a session number of the previous
 > cicle
 > >
 > > What is going wrong?
 > >
 > >
 > >
 > > Greetings,
 > > Huub
 > >
 > >
 >
 > --
 >   -----------------------------------------------------------------
 > |Paul Spencer                           spencer@dmsolutions.ca    |
 > |-----------------------------------------------------------------|
 > |Applications & Software Development                              |
 > |DM Solutions Group Inc                 http://www.dmsolutions.ca/|
 >   -----------------------------------------------------------------
 >
 >
 > _______________________________________________
 > Chameleon mailing list
 > Chameleon@lists.maptools.org
 > http://lists.maptools.org/mailman/listinfo/chameleon

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