[Mapserver-users] can I use different symbols in thesamedynamic layer?

[Frieso ter Haseborg]

Hi,

okay: new color, new class - sounds good, I think. But - here comes
another newbie-question - how do I tell the points to which class they
belong???

Doesn't this lead back to the CLASSITEM/EXPRESSION-question or am I
missing something?

TIA,
Frieso


>-----Original Message-----
>From: Eric Bridger [mailto:eric at gomoos.org]
>Sent: Wednesday, September 24, 2003 12:02 PM
>To: Frieso ter Haseborg
>Cc: Mapserver List
>Subject: RE: [Mapserver-users] can I use different symbols in
>thesamedynamic layer?
>
>
>You're right Frieso,
>I am still using 3.6
>
>The issue you mention below exists in 3.6 as well.  What you need to do
>is to get a new class for each point and set the color and symbol anew.
>
>On Wed, 2003-09-24 at 09:27, Frieso ter Haseborg wrote:
>> Hi,
>> 
>> one more question: Can't I change the color the same way? After
>> successfully using different symbols, I tried to change the 
>color of the
>> symbols also. But a color-change only takes effect for the 
>first change
>> resp. for the first symbol drawn. All subsequent symbols are drawn in
>> _this_ new color also, but not in the individual color specified for
>> each symbol.
>> 
>> My PHP/MapScript goes like this:
>> $sym1 = $map->getSymbolByName ( "excl" );
>> $sym2 = $map->getSymbolByName ( "tent" );
>> $class = $layer->getClass (0);
>> $style = $class->getStyle(0);
>> 
>> // first point
>> $style->color->setRGB(0, 0, 255); // now the next point will 
>change to
>> blue 
>> 					    // (symbols in mapfile are
>> initialized in red)
>> 					    // THIS CHANGE WORKS!
>> $style->set ( 'symbol', $sym1 );
>> $pt = ms_newPointObj();
>> $pt->setXY( 2100000, 10100000 );
>> $pt->draw($map, $layer, $image, 0, "Pt1");
>> 
>> // second point
>> $style->color->setRGB(0, 255, 0); // now the next point IMO should
>> become green, but it doesn't, it stays blue
>> 					    // THIS CHANGE FAILES!
>> $style->set ( 'symbol', $sym2 );
>> $pt = ms_newPointObj();
>> $pt->setXY( 4400000, 10000000 );
>> $pt->draw($map, $layer, $image, 0, "Pt2");
>> 
>> 
>> Am I overlooking something or is there any restriction I ran into?
>> 
>> TIA,
>>  
>> Frieso ter Haseborg
>> - Software Development - 
>>  
>> --
>> 
>> -------------------------------------------------- 
>> S&F Datentechnik GmbH&Co.KG 
>> Reimersstr. 41b 
>> 26789 Leer, Germany
>> 
>> 
>> 
>> >-----Original Message-----
>> >From: Frieso ter Haseborg 
>> >Sent: Wednesday, September 24, 2003 9:52 AM
>> >To: Eric Bridger
>> >Cc: mapserver-users at lists.gis.umn.edu
>> >Subject: RE: [Mapserver-users] can I use different symbols in the
>> >samedynamic layer?
>> >
>> >
>> >Hi Eric,
>> >
>> >thanx, yes this helped a lot. It works - but so far only, when 
>> >using the StyleObj-Class.
>> >
>> >I did the following in PHP:
>> >
>> >$sym1 = $map->getSymbolByName ( "excl" );
>> >$sym2 = $map->getSymbolByName ( "tent" );
>> >$class = $layer->getClass (0);
>> >$style = $class->getStyle(0);
>> >
>> >$style->set ( 'symbol', $sym1 );
>> >[...]//draw point1
>> >
>> >$style->set ( 'symbol', $sym2 );
>> >[...]//draw point2
>> >
>> >It looks like the symbol attribute is obsolete in MS and 
>> >PHP/MapScript version 4.0, though no error is raised. It 
>> >simply effects nothing in my configuration. Which version 
>do you use?
>> >
>> >Anyway it works, thanx again!
>> >
>> >Best regards,
>> > 
>> >Frieso ter Haseborg
>> >- Software Development - 
>> > 
>> >--
>> >
>> >-------------------------------------------------- 
>> >S&F Datentechnik GmbH&Co.KG 
>> >Reimersstr. 41b 
>> >26789 Leer, Germany
>> > 
>> >
>> >
>> >
>> 
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>> 
>
>
>
>