[Paraview] picking/widgets, events, ImageData -> plots

Randy Heiland heiland at indiana.edu
Wed Oct 27 13:59:09 EDT 2010

Time frame?  I'm an academic.  And you're offering free, open source software. :)  Let's just say +1 to a request list.

But beyond the selection functionality, is there some way to (dynamically) connect the selection to update a 2-D plot?  I can (sort of) already select a row in my ImageData, if I use a 3D view (http://mypage.iu.edu/~heiland/pv-stuff/).  But is there some magic to connect that selection to a port, that triggers an update to a plot window, etc?


On Oct 27, 2010, at 12:26 PM, Utkarsh Ayachit wrote:

> Randy,
> The 2D view by default uses a texture-based mapper for rendering the
> image slice. We haven't implemented the selection capability yet for
> this mapper (the same is true if you use slice representation in the
> 3D view). What is your time frame for this application? Maybe we can
> fast track adding support for selecting on image slices. An
> alternative is to create a frustum selection and that should work even
> in 2D view with slices.
> Utkarsh
> On Tue, Oct 26, 2010 at 2:08 PM, Randy Heiland <heiland at indiana.edu> wrote:
>> Hi all,
>> I'm trying to evaluate ParaView (3.8.1) as a possible framework/app for a tool we're trying to build (standalone, not client/server).  Our tool will primarily vis only static 2D ImageData.  We would like the ability to select a region of the ImageData, e.g. select an entire row, and have an X-Y plot be displayed in another window.  So, in this use case, one window (ImageData) remains static, but as a new row is selected, another window (plot/chart) is dynamically updated.  I'd welcome pointers to docs/examples and suggestions.
>> I did see this thread on widgets:
>> http://paraview.markmail.org/search/?q=mouse+event#query:mouse%20event+page:1+mid:iqhyx3k4ik6sk5ue+state:results
>> and I was also playing around with the Selection Inspector.  However it seems that this only works with a 3D window(?) which is actually something I'd like to avoid, in terms of the freedom to rotate the ImageData about X or Y.
>> thanks, Randy
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