Re: Bug in slider object

Thanks much for the detailed report. I agree that there should be a
label option (and maybe as you say some other options). I can't
promise when I might get to this; feel free to give it a try yourself
and send it to me.

Bruce Sherwood

On Thu, Jun 9, 2011 at 3:50 PM, Seth Morton <[email protected]> wrote:
> Hello all,
>
> I may have found a bug in the slider object regarding setting self.value
> with __init__.  When you declare a slider the slider first runs
> ctrl.__init__, since it is a subclass of the ctrl object.  Inside of
> ctrl.__init__, if "value" is one of the arguments, it puts the value of
> "value" into self.value, which is defined with the property function of
> the slider as the method slider.setvalue.  In slider.setvalue, it wants
> to access self.axis, but self.axis is not defined until after
> ctrl.__init__.  This results as an AttributeError.  A workaround is to
> define value after running __init__ on the slider, but this is a bug
> that might want to be looked at.
>
> As a side note, regarding the slider object, I have a feature request.
> It would be nice if there could be a label on the slider like for a
> button, so that the current value of the slider is displayed on the
> handle.  This is the case on the custom sliders in the colorsliders.py
> example for vpython.  Additionally, I notice that these sliders are made
> of a sphere and cylinder, not of boxes.  It might be nice for the user
> to be able to choose the shape of the slider, either boxes or smooth.
>
> Seth Morton
>
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