Colormap/Zoomraster problem (?)

[William T. Stockhausen]

Hi,

I'm using the Swarm 2.2 pre-release (version 2, I think).  I've run into a
problem when assigning a colormap to a zooomraster.  I create 2 colormaps
and 3 zoomrasters in a GUI ObserverSwarm using the code snippet:

    // First, create colormaps: this is a global resource, the information
    // here can be used by lots of different objects.
    cmDensity = new ColormapImpl (getZone ());
    cmHabitat = new ColormapImpl (getZone ());

    // Colours [0,255) are assigned to the range Red [0, 1), for densities
    for (int i = 0; i < 255; i++)
      cmDensity.setColor$ToRed$Green$Blue ((byte) i, (double) i / 255.0, 0,
0);
    System.out.println ("Set cmDensity.");

    // set various colors for habitat
    cmHabitat.setColor$ToName ((byte) 0, "white");
    cmHabitat.setColor$ToName ((byte) 1, "black");

    // Next, create 2d windows for display.
    System.out.println ("Creating zrBenthicHabitat.");
    zrBenthicHabitat =
CreateZoomRaster("zrBenthicHabitat","_zrBenthicHabitatDeath_",
                                         cmHabitat,"Benthic Habitat Map");
    System.out.println ("Creating zrPlanktonicDensity.");
    zrPlanktonicDensity =
CreateZoomRaster("zrPlanktonicDensity","_zrPlanktonicDensityDeath_",
                                         cmDensity,"Planktonic Density
Map");
    System.out.println ("Creating zrBenthicDensity.");
    zrBenthicDensity =
CreateZoomRaster("zrBenthicDensity","_zrBenthicDensityDeath_",   <--error
happens on this call
                                         cmDensity,"Benthic Density Map");
to CreateZoomRaster


where CreateZoomRaster is the following method:

//--------------------------------------------------------------------------
--------

  private ZoomRaster CreateZoomRaster(String zrName, String zrDeath,
                                      Colormap cmO, String zrTitle) {

    ZoomRasterImpl zrT;
    //System.out.println ("Creating ZoomRaster\n");
    zrT = new ZoomRasterImpl (getZone (), zrName);
    try {
      zrT.enableDestroyNotification$notificationMethod
        (this,
         new Selector (getClass (), zrDeath, false));
    } catch (Exception e) {
      System.err.println ("Exception " + zrDeath + ": "
                          + e.getMessage ());
    }

    //System.out.println ("Setting ZoomRaster\n");
    zrT.setColormap (cmO);
<--error occurs on this line
    zrT.setZoomFactor (1);
    zrT.setWidth$Height (modelSwarm.getWorldX (), modelSwarm.getWorldY ());
    zrT.setWindowTitle (zrTitle);
    zrT.pack();                         // draw the window.
    //System.out.println ("Returning ZoomRaster.\n");
    return zrT;

  }  // private ZoomRaster CreateZoomRaster
//--------------------------------------------------------------------------
----------

The two colormaps and the 1st two zoomrasters get created fine.  When the
third zoomraster (zrBenthicDensity) is created, I get the following error
when the program attempts the line "zrT.setColormap (cmO);" in
CreateZoomRaster:

*** event raised for error: InvalidArgument
*** function: _i_Colormap__setColor_ToName_(), file:
/src/Swarm/swarm/src/tkobjc/Colormap.m, line: 64
attempted to set color 255 twice
*** execution terminating due to error
/src/Swarm/swarm/src/defobj/Symbol.m:173 -[Error(c) _raiseEvent:]
      0 [sig] 0`ÃÝ 337 open_stackdumpfile: Dumping stack trace to
java.exe.stackdump


As far as I can tell, I'm not changing the colormap (cmDensity) at all--I'm
just assigning it to the new zoomraster. Any ideas?
        1. Do I need to create another colormap, so that each zoomraster uses a
unique colormap?
        2. Or should I only be creating one colormap and using it for each
zoomraster?  [Previously, the code ran fine when I              (accidentally, 
as it
happens) assigned just one colormap (cmHabitat) to all three
zoomrasters--although the               colors weren't what I expected for the 
two
Density zoomrasters.]

Thanks for any and all help!

Buck
***********************************************************************
*William T. Stockhausen                     e-mail: address@hidden     *
*Senior Marine Scientist                    voice : 804-684-7643      *
*Virginia Institute of Marine Science       fax   : 804-684-7250      *
*College of William and Mary                http://www.vims.edu/~buck *
*Greate Road                                                          *
*Gloucester Point, VA 23062-1346                                      *
***********************************************************************


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