[vtk-developers] Parallel coordinates chart looking nice

Marcus D. Hanwell marcus.hanwell at kitware.com
Tue Apr 6 10:37:11 EDT 2010

Hi Eric,

Just a quick note - I have updated the logic in the charts and the
annotation link's signal should be correctly fired now. I have also added
transparency to the line drawing at Jeff's suggestion and this looks much
better. I should add a couple of pens where the user can control the look of
the lines through the public API.


On Mon, Apr 5, 2010 at 5:02 PM, Marcus D. Hanwell <
marcus.hanwell at kitware.com> wrote:

> Hi Eric,
> Just to let you know I have bidirectional selections working in ParaView,
> the one wrinkle is that the vtkAnnotationLink is not invoking its changed
> event. You could listen to the chart's selection changed event, and I will
> talk to Jeff about integrating it better with the vtkAnnotationLink API.
> I have tested it in ParaView with a line chart, spread sheet, 3D view (line
> probe) and the parallel coordinate view. It is working quite well, but there
> are still a few bugs I need to track down. It requires more selection modes
> too, as well as better interaction with axes etc.
> Marcus
> On Mon, Apr 5, 2010 at 12:39 PM, Eric E. Monson <emonson at cs.duke.edu>wrote:
>> Hey Marcus,
>> That sounds great. If you could give me a heads-up when you commit the
>> bi-directional selections I'd really appreciate it.
>> Talk to you later,
>> -Eric
>> On Apr 5, 2010, at 11:53 AM, Marcus D. Hanwell wrote:
>> Hi Eric,
>> On Mon, Apr 5, 2010 at 11:45 AM, Eric E. Monson <emonson at cs.duke.edu>wrote:
>>> Hey Marcus,
>>> It looks like you're making some good progress on this, and I see that it
>>> shows up as a view in ParaView now, too!
>>> I don't want to be bugging you about it, but it looks like so far the
>>> AnnotationLink stuff is built in so that outside links will be reflected in
>>> the parallel coordinates chart, but selections made within the parallel
>>> coordinates chart do not update the internal annotation link selection list
>>> (and do not fire AnnotationChangedEvent). Is this something that you plan to
>>> add soon? (Or, am I misreading the code as it stands?)
>> Don't worry about bugging me, you are reading the code correctly. I have
>> some local changes where I am working on getting the selections back out and
>> into ParaView. I have not got the last part working (into ParaView), but
>> hope to have something I can commit very soon.
>>> Again, I don't want to be bugging you, but I am curious whether I should
>>> spend time trying to plug this into my personal copy since I need it for my
>>> own use, or if you'll be addressing it soon in the main repository?
>> I am working on this right now. I will let you know once I have committed
>> something that should work, it would be great to have feedback on this final
>> part once it is in. Then I will have some rendering issues to work out, but
>> selection should work in and out.
>> Thanks,
>> Marcus
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