[kepler-users] Why doesn't "Listen to Actor" work on Kepler 2.2/2.3 for Windows?

[Daniel Crawl]

Hi Edward and Daren,

"Listen to Actor" is invoked from the context menu on the canvas,
and the exception is also thrown when double-clicking on the Python
Actor to edit the script. These are probably run from the Swing
event thread.

Daren, thanks for verifying this problem occurs with Java 7 but not 6.
I updated Kepler a few months ago so that it would compile with Java 7.
However, when I ran it, I didn't exhaustively test all the
functionality. I'll create bug report so this error is not forgotten.

   --dan


On 2/14/12 11:59 PM, Daren Thomas wrote:
> i resolved this issue temporarily by uninstalling java 7, thus
> ensuring java 6 is being used. it all works fine now. hope that helps!
>
> daren
>
> On 15.02.2012, at 00:51, "Edward A. Lee"<eal at eecs.berkeley.edu>  wrote:
>
>>
>> This sort of thing can happen for GUI code that invoked outside
>> the Swing event thread. How is this being invoked?  If it's just
>> from the menu, then I presume it is in the Swing event thread...
>>
>> Edward
>>
>>
>> On 2/14/12 11:29 AM, Daniel Crawl wrote:
>>>
>>> Hi Daren,
>>>
>>> I get the same behavior with Windows 7. The error is the same for
>>> both "Listen to Actor" and editing a Python script:
>>>
>>> java.lang.NullPointerException
>>> at ptolemy.actor.gui.TextEditor.getBackground(TextEditor.java:144)
>>> at java.awt.Window.setBackground(Unknown Source)
>>> at java.awt.Frame.setBackground(Unknown Source)
>>> at ptolemy.gui.Top.access$1001(Top.java:141)
>>> at ptolemy.gui.Top$SetBackgroundRunnable.run(Top.java:1889)
>>> at ptolemy.gui.Top.deferIfNecessary(Top.java:247)
>>> at ptolemy.gui.Top.setBackground(Top.java:501)
>>> at ptolemy.actor.gui.TextEditor.setBackground(TextEditor.java:238)
>>> ...
>>>
>>> Christopher, do you know what causes this?
>>>
>>> Thanks,
>>>
>>> --dan
>>>
>>>
>>> On 2/8/12 4:28 AM, Daren Thomas wrote:
>>>> I can use "Listen to Actor" for Kepler 2.3 on Mac OS X, but not under
>>>> Windows. When I select the option from the context menu, nothing
>>>> happens.
>>>>
>>>> Also, when I try to edit a script for the Python actor, I get an error
>>>> message "Failed to open a dialog to edit the target (null)" - this
>>>> doesn't bother me ATM, but I guess I should mention it, as it could be
>>>> an additional symptom of a wrongly configured system.
>>>>
>>>> I installed Kepler 2.3 on Windows with the installer provided on the
>>>> website. It seems "all" questions in the users list refer to compiling
>>>> your own version/environment. Is that the way to go?
>>>>
>>>> Regards,
>>>> Daren Thomas
>>>> _______________________________________________
>>>> Kepler-users mailing list
>>>> Kepler-users at kepler-project.org
>>>> http://lists.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users
>>>>
>>> _______________________________________________
>>> Kepler-users mailing list
>>> Kepler-users at kepler-project.org
>>> http://lists.nceas.ucsb.edu/kepler/mailman/listinfo/kepler-users
>> <eal.vcf>
>