[kepler-users] remove parameter ???

[Christopher Brooks]

Try setting the container of the parameter to null.
This usually does it.
You may need to create a MoMLChangeRequest, especially
if you want have the Undo facility handle the change or
if the UI does not recognize the change.

The way I sometimes track these down is to look at how
the UI handles something similar.  In this case, the
edit parameters dialog has the code.  The title
of the window in Ptolemy is "Edit parameters for"
and then the actor name.  The name of the window in Kepler
might be different. . .  I then search the code base
for the string "Edit parameters for", which leads me
to ptII/ptolemy/actor/gui/EditParametersDialog.java

Searching EditParametersDialog.java for "Remove" finds
a code block that queues up a change request:

             // If the OK button was pressed, then queue a mutation
             // to delete the parameter.
             String deleteName = query.getStringValue("delete");

             if (dialog.buttonPressed().equals("OK") && 
!deleteName.equals("")) {
                 String moml = "<deleteProperty name=\"" + deleteName + 
"\"/>";
                 _target.addChangeListener(this);

                 MoMLChangeRequest request = new MoMLChangeRequest(this,
                         _target, moml);
                 request.setUndoable(true);
                 _target.requestChange(request);
             }


_Christopher

turuncu at be.itu.edu.tr wrote:
> Hi,
> 
> I just wonder that is it possible to remove parameter from actor using
> java code? How can i do this? I can create parameter field using following
> code (simplified version),
> 
> StringParameter[] params = new StringParameter[10];
> for (int i=0; i<10; i++) {
> params[i] = new StringParameter(this, "params"+i);
> params[i].setDisplayName(i);
> params[i].setExpression(i);
> }
> 
> and i want to remove some of them when an other parameter is changed
> (attribute change method).
> 
> Any suggestion will be helpful.
> Best,
> 
> --ufuk
> 
> 

-- 
Christopher Brooks (cxh at eecs berkeley edu) University of California
CHESS Executive Director                      US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust        Berkeley, CA 94720-1774
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