[vtkusers] vtkContourWidget - continous line drawing

[Karthik Krishnan]

This is great. I tried it and I like it. Could you add this bit of
functionality to the widget itself, perhaps yet another mode say,
"ContinuousModeOn()" ?

Thanks
--
karthik

On Thu, Mar 4, 2010 at 6:04 PM, Dean Inglis <dean.inglis at camris.ca> wrote:
> I've figured out how to get vtkContourWidget to do continuous
> or snap line drawing on a vtkImageActor by making use of a callback
> and the widget's vtkWidgetEventTranslator, but its a bit kludgy.
>
> Part of the problem is that the widget only fires off vtkCommand
> events and not its vtkWidgetEvent events, so I had to do a mix of
> observing both widget and renderwindowinteractor fired events.
>
> With this set up the user can:
> 1) left button down to start a contour
> 2) left down and hold and drag draws continuously
> 3) left down and up snap draws if FollowCursor is set to on in the widget
> 4) right button down finishes the contour
> 5) middle button down deletes the contour
>
> Im wondering if anyone has figured out a more elegant solution that
> wouldnt involve all this lower level tinkering.
>
> If anyone is interested, the code is attached.
>
> thanks,
> Dean
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