[kepler-dev] subclassing actors: ptolemy.actor.lib.MonitorValue

[Christopher Brooks]

Hi Paul,
Our email crossed.

I agree that how the xml file determines the icon is subtle.
Chapter 5 of Volume 1 of the Ptolemy II Design doc does not cover it.
I'll see about updating this sometime - I don't have access to 
Framemaker right now.

_Christopher

Paul Allen wrote:
> I've answered my own question: The cool GUI functionality comes from an 
> property in the MOML file in the definition of the MonitorValue <entity>
> 
> <property name="_icon" class="ptolemy.vergil.icon.UpdatedValueIcon">
>    <property name="attributeName" 
> class="ptolemy.kernel.util.StringAttribute" value="value">
>    </property>
>    <property name="displayWidth" class="ptolemy.data.expr.Parameter" 
> value="displayWidth">
>    </property>
> </property>
> 
> I'm wondering which documentaiton I ignored that would have told me this.
> 
> Paul Allen wrote:
>> I'm trying to add some additional functionality to 
>> ptolemy.actor.lib.MonitorValue. I created a subclass BAPMonitorValue 
>> that does nothing but have the BAPMonitorValue(CompositeEntity 
>> container, String name) constructor calling, super(container, name). 
>> When I open Kepler and use Tools->Instantiate Component and add my 
>> actor to the work area, my actor looks completely different from the 
>> normal MonitorValue actor.
>>
>> Here's the question: How does ptolemy.actor.lib.MonitorValue get its 
>> look and GUI functionality (i.e., showing it's current value)? It's 
>> not defined in the ptolemy.actor.lib.MonitorValue class (or super 
>> classes) as far as I can tell.
>>
>> -Paul
>>
>>
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>>
> 
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-- 
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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