[Paraview] source with optional input port

[Utkarsh Ayachit]

That sounds reasonable, but specification of multiple group names and
xml names and the m*n matching between them seems funny. Any ideas on
how we can make that more explicit? What is the user wants the panel
for (readers, MyReader) and (filters, MyFilter) but not (readers,
MyFilter)? Not sure if it's even worth the trouble -- but just in case
you can think of a cleaner solution.

Utkarsh

On Fri, Dec 18, 2009 at 6:36 PM, burlen <burlen.loring at gmail.com> wrote:
> Hi folks,
>
> I'd like to have a PV data source that can be used either as a
> source(without an input dataset) or as a filter(with an input dataset).
> Based on what I have observed, to accomplish it the source has to show up
> both in the sources menu and the filters menu, which is easy to do with the
> XML by adding an entry in both the sources and filters groups that points
> back to the same class and base proxy. It all works except for sharing a
> custom qt panel between them, specifically sharing the panel across proxy
> groups isn't currently allowed.
>
> The attached patch enables a custom panel to be shared across the
> sources/filters proxy groups. Assuming that this is the right way to
> accomplish this can this patch be committed?
>
> Why would you want to do this?  For one example:
> a source with an optional input used like a filter can then extract spatial
> bounds from the input dataset and then position itself automatically in the
> scene. This makes the source faster/easier to use than if you have to type
> in the coordinates to position it. There are plenty of other examples, with
> one thing in common, the potential to make the source easier/faster to use.
>
> Burlen
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