Re: [Visualpython-users] slider

[Bruce S. <bas...@un...>]

In the current version of VPython there is a module "controls" which 
lets you create sliders and buttons (albeit a bit primitive). You could 
pick up the current visual zip file from "Files useful on all platforms" 
and try it; I think it will run with Python 2.2 (but I might be wrong -- 
maybe it needs Python 2.3; it uses "properties").

It isn't documented but should be that gdots and other graph objects 
have attributes that let you get at their parents. For example:

g = gdots()

g.gdisplay is the gdisplay within which this gdots object was created.

g.gdisplay.display is the Visual display within which the graph is 
displayed, which means that gdots.gdisplay.display.visible = 0 will get 
rid of the graph window.

for obj in g.gdisplay.display.objects:
	obj.color = color.red # turns everything red

Bruce Sherwood

Cornelius Sicker wrote:

> Hi,
> i'm using Win2k, Python 2.2.2 and VPython 2002-12-12.
> I simply want to implement a slider, which controls the value of a variable, but i don't know how to do this.
> Is there also an easy way to inscribe the slider (title) and show its current value?
> Another problem I have is the following: I use the gdots function of visual.graph to plot some dots in a gdisplay. How can I clear the display?
> 
> Thanks for your help.
> -Cornelius
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