[Mapserver-users] Annotation setExpression() problem

[Charlton Purvis]

Just for kicks, could you do a

// before setExpression
save($tmp_mapfile);

// after setExpression
save($tmp_mapfile);

and pass them along?

I was initially concerned about the fact that your original expression
had [TRTAREA] in it since your subsequent setExpressions rely on your
CLASSITEM.  But since you plugged /1699|1804/ directly in your .map and
it works OK, I guess that's moot.

> -----Original Message-----
> From: Rene Teniere [mailto:TENIERER at gov.ns.ca]
> Sent: Monday, February 16, 2004 1:58 PM
> To: Charlton Purvis; mapserver-users at lists.gis.umn.edu
> Subject: RE: [Mapserver-users] Annotation setExpression() problem
> 
> Charlton,
> 
> I added the parentheses, but it didn't work, and I put it exactly the
> way it was written in the variable in the mapfile: EXPRESSION
> /1699|1804/ and that worked! The problem is that the expression is
being
> changed, but doesn't seem to be applied to the layer itself. I checked
> this through the getExpression(), whereby I printed out the initial
> expression (the one that's in the mapfile ([TRTAREA]>0)), then set the
> new expression and printed that one out. The formats should be
> acceptable. Ex: If I initially set the mapfile expression to:
EXPRESSION
> /1699|1700/ then through getExpression(), /1699|1700/ is printed off.
> When I use setExpression($sExp) whereby $sExp = "/1699|1700/",
> /1699|1700/ is printed off as well. The difference is that the first
one
> works (I only get poly's 1699 and 1700 displayed), while the other
> method does not work at all. If the initial expression is different
than
> the one set in PHP, the original mapfile expression is used. Man I
hope
> this makes sense to someone :(
> 
> Rene
> 
> >>> "Charlton Purvis" <cpurvis at asg.sc.edu> 2004-02-16 2:15:06 PM >>>
> Rene:
> 
> I know that I have to put in opening and closing parens for my
> setFilter's (for postgis), and that isn't explicitly documented in the
> PHP documentation.  Maybe you could try that?
> 
> Or what if you tried to dump everything to a .map to see the state of
> all your variables?
> 
> Charlton
> 
> > -----Original Message-----
> > From: Rene Teniere [mailto:TENIERER at gov.ns.ca]
> > Sent: Monday, February 16, 2004 12:26 PM
> > To: mapserver-users at lists.gis.umn.edu
> > Subject: [Mapserver-users] Annotation setExpression() problem
> >
> > Hi all,
> > Wondering if someone can help me here. I am creating an annotation
> > layer with a dynamic expression to label only what I want each time.
> > Problem is that I cannot set the expression through mapscript. It
> works
> > fine hard-coded in the mapfile, but it has to be done through php.
> The
> > expression would look like: /1234|2345|3456/ or /1234/  That is
> > represented in the $sExp variable in the code below. At first I set
> up
> > the mapfile annotation layer without an expression then used
> > $class->setExpression($sExp); to set the expression. That did not
> work,
> > even though the variable contents worked in the mapfile with the
> desired
> > results.
> >
> > Next, I got rid of the annotation layer in the map file and decided
> to
> > create it through php/mapscript. The end results showed up with no
> > annotation at all. The code for the layer creation is below, and I
> have
> > no idea why it will not work. Anyone have any ideas?
> >
> > Rene
> >
> >    <?php
> >       $map_path = "C:/chameleon11a/websites/wap/";
> >       $map = ms_newMapObj($map_path."sketch.map");
> >       $map->setExtent($minX-10, $minY-10, $maxX+10, $maxY+10);
> >       $image = $map->draw();
> >       $wap = $map->getLayerByName("WAP");
> >       $shapes = ms_newLayerObj($map, $wap);
> >       $shapes->set("name","Shapes");
> >       $shapes->set("data","");
> >
> >       //Create the annotation layer
> >       $anno = ms_newLayerObj($map);
> >       $anno->set("name","annolayer");
> >       $anno->set("maxscale",500000);
> >       $anno->set("status",MS_ON);
> >       $anno->set("data","D:\gis_data\wap_2002\all");
> >       $anno->set("type",MS_LAYER_ANNOTATION);
> >       $anno->set("labelitem","ID");
> >       $anno->set("classitem","ID");
> >
> >
> >       $class = ms_newClassObj($anno);
> >       $class->set("name","annoclass");
> >       $class->set("status",MS_ON);
> >
> >       $class->label->type->MS_BITMAP;
> >       $class->label->size->MS_MEDIUM;
> >       $class->label->position->MS_CC;
> >       $class->label->color->setRGB(255,0,0);
> >
> >       //Create Annotation Expression
> >       $sExp = "/".$nID[0];
> >       for($k=0; $k<=$nCOUNT; $k=$k+1)
> >       {
> >         if($k>0)
> >         {
> >           $sExp = $sExp."|".$nID[$k];
> >         }
> >       }
> >       $sExp = $sExp."/";
> >
> >       //$expression = $class->getExpression();
> >       //error_log("Before:".$expression);
> >
> >       $class->setExpression($sExp);
> >
> >       //$expression = $class->getExpression();
> >       //error_log("After:".$expression);
> >
> >       $shapes_class = ms_newClassObj($shapes);
> >
> >       $wap->open();
> >       for($j=0; $j<=$nCOUNT; $j=$j+1)
> >       {
> >         $nShape[$j] = $wap->getShape(-1, $nIndex[$j]);
> >         $nShape[$j]->draw($map, $shapes, $image);
> >       }
> >       $wap->close();
> >
> >       $scalebar = $map->drawScaleBar();
> >       $image_url = $image->saveWebImage();
> >       $scalebar_url = $scalebar->saveWebImage();
> >     ?>
> >
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