Problem with mapping RealType and TextType to Display.Text

[Andrew Donaldson <A.Donaldson@xxxxxxxxxx>]

I've been able to get text on the display with either
    a) mapping a RealType to Display.Text
or  b) mapping a TextType to Display.Text

but if I map both, the RealType is not displayed.

Is that behaviour expected?  What is the official solution?

See the attached program to demonstrate this.

thanks,

Andrew.

-- 
 Andrew Donaldson                                           
 Email:   A.Donaldson@xxxxxxxxxx                Bureau of Meteorology
 Phone:   +61 3 9669 4537            P.O. Box. 1289K/150 Lonsdale St,
 Fax:     +61 3 9669 4128                       Melbourne, Australia.

import visad.*;
import visad.java2d.DisplayImplJ2D;
import java.rmi.RemoteException;
import java.awt.*;
import javax.swing.*;


public class simple
{
        public simple (String []args)
                throws RemoteException, VisADException
        {
                RealType time = new RealType("time");
                RealType height = new RealType("height");
    
                DisplayImpl display = new DisplayImplJ2D("display1");
    
                // Maps
                display.addMap(new ScalarMap(RealType.Latitude, Display.XAxis));
                display.addMap(new ScalarMap(RealType.Longitude, 
Display.YAxis));
                display.addMap(new ScalarMap(height, Display.Text));

                // The line below does not break this program!
                display.addMap(new ScalarMap(new RealType("bar"), 
Display.Text));

                // The line below breaks this program!
                display.addMap(new ScalarMap(new TextType("foo"), 
Display.Text));
                /*
                 * Load up the data
                 */
                RealType cnameType = height;
        
                RealType[] rangeTypes = {
                        RealType.Latitude,
                        RealType.Longitude,
                        cnameType
                };
                RealTupleType rangeTupleType = new RealTupleType(rangeTypes);

                FunctionType function
                        new FunctionType(RealType.Generic, rangeTupleType);

                // Domain
                int ntimes = 2;
                Set timeSet = new Linear1DSet(RealType.Generic, 0.0,
                        (double) (ntimes - 1.0), ntimes);

                FieldImpl field = new FieldImpl(function, timeSet);
        
                // Store the range data
                Real[] data = {
                        new Real(RealType.Latitude, 33.5),
                        new Real(RealType.Longitude, 33.5),
                        new Real(cnameType, 33.5)
                };
                RealTuple rangeTuple = new RealTuple(data);
                field.setSample(0, rangeTuple);
    
                DataReferenceImpl data_ref = new DataReferenceImpl("data_ref");
                data_ref.setData( field );

                display.addReference( data_ref );
    
                // Create application window, put display into it 
                JFrame jframe = new JFrame("simple");
                jframe.getContentPane().add(display.getComponent());
    
                // Set window size and make it visible
                jframe.setSize(300, 300);
                jframe.setVisible(true);
        }
  
        public static void main(String[] args)
                throws RemoteException, VisADException
        {
                new simple(args);
        }
}