[Mapserver-users] PHP Mapscript writing rectangles with ms_newRectObj(); on the fly

[Bart van Heijningen]

Hi all,

Before I get out of here I would like to leave a question here , hoping that
one of you guys can help me out.

I use Mapserver4 on RH 8.0 PHP mapscript.

>From a mysql table I want to generate a bar chart which I want to display as
a layer on a map. The location is x,y from the dbase as well.

Sof far I am stuck with drawing the rectangle bar chart.
I want to use 

The thing I try to do is define the amount of bars to display on the given
location and then draw the inidvidual bars defined by their value and define
a colour for the bars.

$wvilayer = $wvimap->getLayerByName("$unit");
$rectObj = ms_newRectObj();

How should I now proceed? I have tried a dozen things but I think I am
overlooking something.

Here's what I have:

Get the layer that refers to the location data where I want to print a bar
chart.



$wvilayer = $wvimap->getLayerByName("$unit");
// Get the first class of the layer
$classObj = $wvilayer->getClass(0);

//get location data from mysql 
     $pointObj->setXY($rd_x,$rd_y);
     $line = ms_newLineObj();
     $line ->add($pointObj);
      $shp = ms_newShapeObj(MS_SHAPE_POINT);

      $shp->add($line);
      //$shp->{text} = $measurements;
      //$shp->{index} = ($count2);
      if($wvilayer->addFeature($shp) == -1){
             echo  "addFeature failed";
         }
      
$pointObj = ms_newPointObj();
 $rectObj = ms_newRectObj();
 //$rectObj->setextent($rd_x,  $rd_y,
 //					   ($rd_x + $hshift) ,
($rd_y*$measurements));
 

     $pointObj->setXY($rd_x,$rd_y);
     $line = ms_newLineObj();
     $line ->add($pointObj);
      $shp = ms_newShapeObj(MS_SHAPE_POINT);

      $shp->add($line);
      //$shp->{text} = $measurements;
      //$shp->{index} = ($count2);
      if($wvilayer->addFeature($shp) == -1){
             echo  "addFeature failed";
         }
      
     // Here  the minx miny maxx and maxy and measure value of the bars in
// the chart are calculated
// These points are calculated correctly
      
      $rectObj->set("minx",(($rd_x)-($hshift)));
 	  $rectObj->set("miny",(($rd_y)+($vshift)));
 	  $rectObj->set("maxx",(($rd_x)-($hshift)+($barwidth)));
 	  $rectObj->set("maxy",((($rd_y)+($vshift)+($measurements))));
 	 

      echo "count2 = $count2 <br>\n";
      echo "meetwaarde count 2 = $point_lookup[$count2] <br>\n";
      //$count2++;
    
    
    $rectObj->draw( $wvimap, $wvilayer, $wviimg, 0, $measurements );

Here it goes wrong the layer is not drawn on the map.
++++++++++


++++++++++ map file ++++++++++++++++++++++

LAYER
  NAME "Ba-140"
  TYPE polygon
   POSTLABELCACHE TRUE
  STATUS OFF
  CLASS
    NAME "Ba-140"
    COLOR 208 28 2
    BACKGROUNDCOLOR 208 28 2
    SYMBOL 'circle'
    LABEL
      TYPE TRUETYPE
      ANTIALIAS FALSE
      PARTIALS FALSE
      POSITION AUTO
      FONT fritqat
      COLOR 0 0 0
      BACKGROUNDCOLOR 254 254 254
      SIZE 6
      POSITION uc
    END
  END
END