[Paraview] Custom Reader Issue

[Adriano Gagliardi]

Yeah, that's what I am using at the moment. However, when I select my mesh
file initially using File->Open, RequestInformation is called. At this point
in time, no data file has been selected. I then have a vtkSetStringMacro
that allows me to browse for a second input file (the data file). However,
for this to then be read in to obtain the variables contained within (hence
populate the point array table), I need to click apply again so that
RequestInformation is called. I was just wondering if there was a workaround
so I could avoid having to reapply the filter.

Adriano


-----Original Message-----
From: Mark Olesen [mailto:Mark.Olesen at faurecia.com] 
Sent: 24 March 2010 11:57
To: agagliardi at ara.co.uk
Subject: Re: [Paraview] Custom Reader Issue

On Wed, 2010-03-24 at 11:00 +0000, Adriano Gagliardi wrote:
> Hi,
> 
> I have a reader that currently reads in a mesh. As an option it will 
> read in a data file associated with the mesh, if provided via file 
> browsing. At the moment the list of data arrays only appears after the 
> filter is applied, since it will only then read in the data file. So 
> the user then has to select the variables he/she wants and then 
> reapplies the filter. I'd like to avoid this and, instead, have it so 
> if the user browses and selects a data file that it will then populate the
point array selection immediately i.e.
> before the filter is applied. Is this possible?

AFIAK that's the purpose of the RequestInformation() method.
You can use it populate arrays etc. The vtkOpenFOAMReader.cxx (for
example) does just that too.

/mark


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