[pmwiki-users] Markup or method to increment/decrement a PTV ("integer") variable?

[Benoit Dutilleul]

Dear Peter, dear Hans,

Thank you for your answers! I've tried MarkupExprPlus and this is
exactly what I needed :) My site is largely using ZAP so I can use
that to save the variable. WikiSh looks interesting as well :) Thanks
for that Peter !

Any idea about if/how I can make calculations using MarkupExprPlus in
a pagelist? I've tried:
[[#SumVotes]]
(:template first:){(add
(:template each:){=$:Var}
(:template last:))}
[[#SumVotesend]]
with the pagelist option wrap=inline but this isn't working. Is it
simply impossible due to the order the markup is processed or is there
a trick to get that to work?

Thanks a lot !

Benoit



2008/6/5 Peter & Melodye Bowers <pbowers at pobox.com>:
>> Subject: [pmwiki-users] Markup or method to increment/decrement a PTV
>> ("integer") variable?
>> Does it exists? How could it be done?
>> Kind regards,
>
> Do you want to change the value temporarily or permanently?  Is it just for
> this load of the page or are you wanting to save it back to the page so it
> will load in its incremented state the next time as well?
>
> If you just want to increment it temporarily for this load then WikiSh
> contains that functionality with the {earlymx(set --ptv ...)} capability.
>
> If you want to save the value back to the page then you're probably going to
> have to come up with a quick function to do it yourself.  If you're
> interested I have recently put together a "toolbox" recipe (toolbox.php)
> which is still under development but it has a function writeptv() which
> would make this job very easy.  It's not yet documented on the cookbook
> page, but the arguments are fairly self explanatory.  This is basically what
> it's going to look like for your functionality:
>
> Function incptv($pagename, $pn, $varname)
> {
>   $val = PageTextVar($pn, $varname);
>   $val++; // or $val--;
>   writeptv($pagename, $pn, $varname, $val);
> }
>
> Then depending on what your desired functionality is you could wrap that in
> an MX or some other markup or just have it in your config.php, etc.
>
> Here's a markup definition of (:incptv page varname:) :
> Markup('IncPTV', 'inline',
>    '/\\(:incptv\s+(\S+)\s+(\S+)\s*:\\)/e',
>    'incptv(\$pagename, "$1", "$2")');
>
> Note this has a bunch of copy/pasted sections of code without any compiling
> or testing.  There will certainly be some fixes needed before any of this
> will work.
>
> -Peter
>
>



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