Are you using it on linux with compiz-fusion or high detail graphic effects enabled?<br><br>It happened to me too until I disable compiz.<br><br>- Luis<br><br><div class="gmail_quote">On Wed, Mar 18, 2009 at 6:12 PM, John Eke <span dir="ltr"><<a href="mailto:johne@annidis.com">johne@annidis.com</a>></span> wrote:<br>
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<small><font face="Verdana">Hi,<br>
<br>
I currently have a Qt dialog with a slider. The valueChanged signal
from this slider is connected to a slot in my QVTKWidget subclass which
performs some Window-Level modifications on a vtkImageActor inside the
renderer.<br>
<br>
In the vtk example (Examples/GUI/Qt/ImageViewer) dragging the mouse
across the image is fast enough. So why does it get ridiculously slow
when I send the commands through a slot? Is there a way I can speed it
up?<br>
<br>
- John E</font></small><br>
</div>
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