On 20 Apr 2003 21:02:11 +0200, Felix E. Klee wrote:
>
> I want to do a lot of "realtime" (i.e. M4 is not an option) arithmetics in
> .fvwm2rc. Currently I'm using expressions like
> PipeRead `let "x=$[FVWM_A]*$[FVWM_B]"; printf "SetEnv
> FVWM_C $$x"`
> This has two advantages:
> 1. It is not very readable
> 2. It depends on the shell I'm using
>
> Are there any better ways for doing arithmetics in FVWM? Will arithmetics
> ever be built in?
Use FvwmPerl in 2.5.x for arithmetics and string operations:
FvwmPerl
SendToModule FvwmPerl eval $c = "AnimatedMove"; $n = 50;
SendToModule FvwmPerl eval cmd("Current $c " . ($n / 2) . " 10p")
SendToModule FvwmPerl eval $n /= 5; cmd("AnimatedMove $n 50")
This way you don't need environment variables or separate processes.
But read the man page first. And see the X output for your possible
perl errors.
FvwmPerl may also be used as a more powerful replacement for FvwmCpp and
FvwmM4 using its -p (--preprocess) flag.
Regards,
Mikhael.
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