Cool plugin. Although I am experiencing a weird bug:
- it only draws the arrows ONCE by any event the pd window is redrawn
  - events that I tried and worked (thus the arrows magically appear): save patch, move patch window. change desktop.
  - events that do not do nothing: moving stuff inside the patch (moving an object, drawing new coords).

Could be an X/ubuntu issue, maybe its just here. I have to try on other machines (anyway: Ubuntu 10.10, gnome, pd 0.43 extended latest nigthly build, your plugin was downloaded from the list, second mail you sent with the bugfix)

best regards,
pedro

On Sat, Aug 27, 2011 at 12:23 AM, ALAN BROOKER <alan.brooker2010@gmail.com> wrote:
cool... like this
...thanks Hans!
On Tue, Aug 16, 2011 at 7:39 PM, Hans-Christoph Steiner <hans@at.or.at> wrote:
>
> Thanks for the bug report.  This version should fix that:
>
>
> .hc
> On Aug 16, 2011, at 2:29 PM, Daniel Roviriego wrote:
>
> forgot to mention the arrowheads are working, besides the error message:
>
> Using Ubuntu 10.10. Tcl version 8.5.8-2build1 and tk version 8.5.8-1
>
> cheers
>
> 2011/8/16 Daniel Roviriego <danifernando@gmail.com>
>>
>> Hi Hans..
>>
>> Iḿ getting this error trying to use the plugin
>>
>> invalid command name ".gfxstub8566bd8.c"
>> invalid command name ".gfxstub8566bd8.c"
>>     while executing
>> "$tkcanvas itemconfigure cord -arrow none"
>>     (procedure "add_arrows_to_cords" line 8)
>>     invoked from within
>> "add_arrows_to_cords .gfxstub8566bd8"
>>     (command bound to event)
>>
>>
>> cheers
>>
>> 2011/8/16 Hans-Christoph Steiner <hans@at.or.at>
>>>
>>> I whipped up a quick plugin to add arrowheads to cord when in editmode.
>>>  The arrowheads clearly show the direction that the messages are flowing.
>>>
>>> .hc
>>>
>>>
>>>
>>> ----------------------------------------------------------------------------
>>>
>>> Computer science is no more related to the computer than astronomy is
>>> related to the telescope.      -Edsger Dykstra
>>>
>>>
>>>
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>>
>>
>>
>> --
>> Daniel Roviriego
>> (21) 35920701
>> (21) 99561654
>> M2D multi_meios
>>
>
>
>
> --
> Daniel Roviriego
> (21) 35920701
> (21) 99561654
> M2D multi_meios
>
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--
Pedro Lopes (HCI Researcher / MSc)
contact: pedro.lopes@ist.utl.pt
website: http://web.ist.utl.pt/Pedro.Lopes / http://pedrolopesresearch.wordpress.com/ | http://twitter.com/plopesresearch