Karthik.Krishnan at kitware.com
Fri Jan 27 13:30:17 EST 2006
Yes, I did have issues with the GUI not updating itself unless I
reloaded the volume. I did not get a change to look closely at why this
was happening. I'll do so when I get a chance.
Atwood, Robert C wrote:
>Karthik and ITK peopel:
>This Curves3DExtractor is a great application and nearly what I wanted
>to do anyways , but I am having one frustrating problem with the
>Once an image is sent through the pipleine, and a spacial function
>selected with the frustrum selector, I can get some points. However, no
>matter how much I then change the controls of the spatial function
>selector, the extracted point set remains the same. I have clicked on
>all the available buttons , but none of them updates. I have looked in
>the code but I cannot so far figure out where the spatial function
>filter actually gets the information from the widget,
Here's a hunch though :
Take a look at lines 136 and lines 102
All communication for updates happens via the Command/Observers (There's
ample description about this in the SW guide).
Here the spatialFunctionControl's DrawCommand is going to observe the
ParametricSpaceViewer. In other words, every time an
ParametricSpaceViewer invokes an fltk::GLDrawEvent(), the
SpatialFunctionControl responds with its Execute method.
I did see that the shape never gets redrawn unless the volume is reloaded..
Specifically the spatial function's callback is in lines 37 and 238
and its GUI is in
You might want to have debug messages and see if all callbacks are
invoked correctly when you change the parameters.. Its a pretty long chain:
1. SpatialFunctionControl observes the ParametricSpaceViewer (must
redraw on it if the widget changes)
2. ExtractedParametricSpaceViewer observes the SpatialFunctionControl
3. ExtractedParametricSpaceViewer observes the parametric point set
>due to my
>ignorance of all things GUI. So I am stuck with whatever frustum I have
>selected the first time. Does it not do this for you? I updated the ITK
>and ITK_apps CVS today by the way so it should be latest CVS version.
>Thanks for any help
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