Re: [lcd4linux] Regulating animated icon speed

[Michael R. <re...@eu...>]

Hi Benjamin,

> I have an icon to indicate whether my PPP connection is up or not.  I'd also 
> like to regulate the speed of the icon.  In my lcd4linux.conf, I have:
> 
> Widget PPPSpeed {
>         class 'Timer'
>         expression pppspeed = (1/((netdev('ppp0', 'Rx_bytes', 1000) + 
> netdev('ppp0', 'Rx_bytes', 1000))/99999))
>         update 100
> }
> 
> 
> Widget Arrow {
>     class 'Icon'
>     speed pppspeed
>     visible exec('/sbin/ifconfig | grep ppp | wc -l', 1000)
>     Bitmap {
>         Row1 '...'
>     }
> }

> ...But this doesn't work.  How should I be doing this?  Is it even possible?

Hmmm... Took me some time to understand what you're doing, but I think I
got it now: pppspeed is a variable...

I just checked the code: the 'speed' attribute of the icon widget is
evaluated on every call. So it *should* work...

You could try to use the variable in another test widget, formatted as a
number, just to check if it's evaluated correctly.


another idea: the icon widget adds one-shot-timers itself, but only if
speed > 0 (speed = 0 means a static icon, which never changes). So as
soon as your pppspeed variable is zero, speed will be no longer evaluated.

And I'm afraid it *will* be zero, namely on the first call.

So you should prevent it from becoming zero, either by specifying

speed pppspeed+1

or even better

speed max (1, pppspeed)

(maybe replace 1 by a better value, as 1 would be 1 msec, which is
*very* short :-)



bye, Michael

-- 
Michael Reinelt <re...@eu...>
http://home.pages.at/reinelt
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