[Paraview-developers] Handling exceptions from within a Plug-in

[Ellon Paiva]

Mathieu,

I tried the vtkErrorMacro and I got the messages being printed in the 
standard error in the terminal, which is not exactly what I want.

What I am looking for is something like it's shown in the attached 
image: here I forced an error in a python programable filter through a 
syntax error in the script. As you can see the user get an information 
about the error in the "Output Messages" window that pops up when 
"Apply" is pressed, as well as in the terminal. How could I print the 
error message in this Output Window on ParaView?

Regards,

Ellon


On 05/13/2016 03:05 PM, Mathieu Westphal wrote:
> Hello
>
> vtkErrorMacro is the way to go to inform the user of the error, but it 
> will not exit the method, only inform.
> After that you need to return 0 if you want the pipeline execution to 
> stop.
>
> Regards,
>
>
>
>
> Mathieu Westphal
>
> On Fri, May 13, 2016 at 2:54 PM, Ellon Paiva <ellonpaiva at gmail.com 
> <mailto:ellonpaiva at gmail.com>> wrote:
>
>     Hello Mathieu,
>
>     Thanks for your answer.
>
>     I think I was not clear in my question. Surely I can catch the
>     exception in the plugin, but I'm looking for a way to inform
>     paraview that an error occurred while executing the filter. Of
>     course this information should be passed to ParaView when handling
>     the exception, and probably it should halt the processing of the
>     pipeline as well.
>
>     I'm looking now into the files of some plugins inside paraview
>     source. I found that some plugins use the macro "vtkErrorMacro".
>     Would this work for me?
>
>     Regards,
>
>     Ellon
>
>
>     On 05/13/2016 02:47 PM, Mathieu Westphal wrote:
>>     Hello
>>
>>     I supose it's kind of obvious, but why would catch not work ? you
>>     should be able to catch your library exception in your filter.
>>
>>     Regards,
>>
>>     Mathieu Westphal
>>
>>     On Fri, May 13, 2016 at 2:39 PM, Ellon Paiva
>>     <ellonpaiva at gmail.com <mailto:ellonpaiva at gmail.com>> wrote:
>>
>>         Hello all,
>>
>>         I have a plug-in for paraview that wraps filters from an
>>         specific library, and these filters that may throw exceptions
>>         when if not configured properly (example, if the input data
>>         doesn't have some fields). I've been looking for a way to
>>         catch these exceptions inside the plug-in and inform paraview
>>         about the error/problem, like for example showing the error
>>         information in the paraview error window, but I couldn't find
>>         an explanation of how to do that. Could anyone explain me how
>>         to do that or show an example of code for that?
>>
>>         Regards,
>>         Ellon
>>         _______________________________________________
>>         Powered by www.kitware.com <http://www.kitware.com>
>>
>>         Visit other Kitware open-source projects at
>>         http://www.kitware.com/opensource/opensource.html
>>
>>         Search the list archives at:
>>         http://markmail.org/search/?q=Paraview-developers
>>
>>         Follow this link to subscribe/unsubscribe:
>>         http://public.kitware.com/mailman/listinfo/paraview-developers
>>
>>
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/paraview-developers/attachments/20160513/db0038e1/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Output_Message_Window_ParaView.png
Type: image/png
Size: 100096 bytes
Desc: not available
URL: <http://public.kitware.com/pipermail/paraview-developers/attachments/20160513/db0038e1/attachment-0001.png>