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

[Mathieu Westphal]

Hello

vtkErrorMacro should display on the output window.
You can have a look at
ParaViewCore/ClientServerCore/Core/vtkPythonProgrammableFilter.cxx to see
how it is done.

Regards,



Mathieu Westphal

On Fri, May 13, 2016 at 3:41 PM, Ellon Paiva <ellonpaiva at gmail.com> wrote:

> 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> 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>
>> 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
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>>
>>
>
>
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