On Sunday 23 December 2012 22:46:04 Gabriel Willen did opine:

> Should be relatively easy using pycairo for the graphics. You can use
> gtk drawing area and Cairo.create to make the widget.
> 
Unforch, you could probably say that I'm dumber than a box of rocks on both 
subjects.

Where can I find a good tutorial?

> On Dec 23, 2012 7:21 PM, "Gene Heskett" <[email protected]> wrote:
> > Greetings;
> > 
> > Never having played with very much xml, I am wondering how it might be
> > possible to make a round tachometer display that has 2 needles, one in
> > one color for requested speed, and one in a contrasting color to show
> > actual speed as reported by the slightly filtered encoder.velocity
> > output.
> > 
> > I am using the tutorial at:
> > 
> > <http://www.linuxcnc.org/docs/2.5/html/hal/pyvcp_examples.html>
> > 
> > down toward the bottom of that page.
> > 
> > Or is a dual needle display even possible in PyVCP?
> > 
> > I am assuming that if I can make it display the disconnected meter,
> > then a halshow will discover the (halpin)<spindle_rpm>(/halpin) that
> > I can then 'connect' in the postgui.hal to one of the hal outputs
> > from the encoder?
> > 
> > Thanks.
> > 
> > Cheers, Gene
> > --
> > 
> > "There are four boxes to be used in defense of liberty:
> >  soap, ballot, jury, and ammo. Please use in that order."
> > 
> > -Ed Howdershelt (Author)
> > My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
> > Power corrupts.  Absolute power is kind of neat.
> > 
> >                 -- John Lehman, Secretary of the Navy, 1981-1987
> > 
> > I was taught to respect my elders, but its getting
> > harder and harder to find any...
> > 
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Cheers, Gene
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
My web page: <http://coyoteden.dyndns-free.com:85/gene> is up!
Receiving a million dollars tax free will make you feel better than
being flat broke and having a stomach ache.
                -- Dolph Sharp, "I'm O.K., You're Not So Hot"
I was taught to respect my elders, but its getting 
harder and harder to find any...

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