[Mapserver-users] truetype symbol size in legend

[Moritz Lennert]

Eric Bridger said:
> On Mon, 2004-04-26 at 11:02, Moritz Lennert wrote:
>> Hello,
>>
>> Going on with the learning process concerning (proportionately sized)
>> truetype symbols...
>>
>> Thanks to Jan Hartmann and Michael Schulze, I can now satisfyingly
>> display
>> symbols proportionate to a given attribute. Now I would like to be able
>> to
>> display this symbol in the legend at a reaonable size.
>>
>> Below is my entire layer definition. When I display this, I get a
>> one-pixel point in the legend for "Symbole cercle TT". I can "hack" a
>> larger symbol by using the SYMBOL and SIZE commands. However, this works
>> as long as SIZE is smaller then the smallest value in LABELSIZEITEM,
>> otherwise everything smaller is scaled up to the value of SIZE...
>>
>> Is there a way of defining the size of one symbol within the legend ?
>>
>> Moritz
>>
>> ********Layer definition**************
>>
>>   LAYER # Cerclestt
>>     Name Cerclestt
>>     DATA centres_communes
>>     STATUS OFF
>>     TYPE POINT
>>     LABELSIZEITEM VOITURE
>>     FILTER ([VOITURE] > 0)
>>
>>     CLASS
>>      NAME "Symbole cercle TT"
>>      COLOR 255 0 0
>>      TEXT "N" # charactère correspondant au symbole du cercle dans la
>> police ESRI1
>>      LABEL
>>        POSITION cc
>>        FONT esri_1
>>        TYPE truetype
>>        FORCE true
>>        COLOR 255 0 0
>>        ANTIALIAS true
>>      END
>>   END
>>  END # Cerclestt
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>>
>
> This is something of a hack also but you could create a separate layer
> just for displaying the legend. Remove the NAME from your CLASS  above
> to prevent it from displaying in the legend.
>
> Create a new LAYER:
> NAME Cerclestt_legend
> STATUS DEFAULT
> TYPE POINT
> CLASS
>   NAME "Symbole cercle TT"
>   COLOR 255 0 0
>   # circle name defined in symbol.sym file
>   SYMBOL "circle"
>   SIZE N
> END
>
> Set N to the size you want in pixels.  You could also create a TrueType
> "N" circle in your symbol.sym file and use that as your SYMBOL.
>

Thank you, now I get a nice legend. However, it is visible all the time,
and would like to have it shown only when the corresponding layer is
visible. So, I've been experimenting with the REQUIRES command. However, I
just can't seem to make it work. When I set STATUS to DEFAULT, the legend
is always visible, when I set it to ON or OFF it is never visible, even
when the layer CerclesTT is visible...

Any hints ?

Here's my Layer definition:

LAYER # Legende pour cercles truetype
    NAME Cerclestt_legend
    STATUS ON
    REQUIRES "[Cerclestt]"
    TYPE POINT
    CLASS
      NAME "3 travailleurs"
      COLOR 255 0 0
      SYMBOL "point_tt"
      SIZE 30
    END
 END # Legende pour cercles truetype

Moritz