[PyQt] Slider sender().value()

Russell Valentine russ at coldstonelabs.org
Tue Mar 2 00:31:42 GMT 2010

Gib Bogle wrote:
> Using PyQt 4.5.4, I'm getting strange behaviour with sliders.  
> Everything works as expected when the slider handle is dragged, but not 
> when the Left/Right keys are used (this is a horizontal slider).  What 
> happens here is the Left key works OK, being able to take the value all 
> the way down to 0, but the Right key increases the value a few times 
> then starts switching back and forth between n and n+1, where it isn't 
> obvious what determines n, but in any case it's not determined by the 
> maximum value set for the slider.  Two slider both have a maximum value 
> set at 100.  After moving the slider handle to 0, one slider will only 
> move to the right to 2 before switching between 1 and 2, while the other 
> goes up to 36 37 36 ...
> Is this a known bug, or does it suggest an error in my code?
> I'm using PyQt 4.5.4 because 4.7 doesn't work with PyQwt 5.2.0.

I would suggest sending a small example version of the code that just 
has enough code to show the problem you are talking about. You also 
might find the problem when making this small example.

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