Re: [NTG-context] Learning LuaTeX : Invoice

20 Feb 2011

      Am 2011-02-20 um 13:08 schrieb Wolfgang Schuster:
...
local amount = hours * perhour
Thank you - I guess you meant that "local". I tried that, but since my  
error was in the call... anyway.

Please consider the following nearly-minimal example:

\starttext

\startluacode
userdata = userdata or {}

userdata.invoice = { sum = 0, hours = 0, perhour = 100 }

function userdata.numberformat(amount)
	context(string.gsub(string.format("\%.2f", amount), "%.", ","))
end

function userdata.InvoiceLine(text, hours)
	context.NC()
	context(text)
	context.NC()
	userdata.numberformat(hours)
	context("\\,h")
	context.NC()
	context.NC()
	userdata.numberformat(hours * userdata.invoice.perhour)
	context("\\,€")
	context.NC()
	context.NR()
	userdata.invoice.sum = userdata.invoice.sum + hours *  
userdata.invoice.perhour
	userdata.invoice.hours = userdata.invoice.hours + hours
end

function userdata.InvoiceSumLine(text)
	context.HL()
	context.NC()
	context(text)
	context.NC()
	userdata.numberformat(userdata.invoice.hours)
	context("\\,h")
	context.NC()
	userdata.numberformat(userdata.invoice.perhour)
	context("\\,€/h")
	context.NC()
	userdata.numberformat(userdata.invoice.sum)
	context("\\,€")
	context.NC()
	context.NR()
end

\stopluacode

\starttabulate[|lw(8cm)|rg(,)w(2cm)|rg(,)w(2cm)|rg(,)w(3cm)|]
%\ctxlua{userdata.InvoiceLine("Play with \\LUATEX", 2.5)}
\ctxlua{userdata.InvoiceLine("Do some \\CONTEXT", 0.5)}
\ctxlua{userdata.InvoiceSumLine("Sum")}
\stoptabulate

\stoptext

That seems to work so far, but invoice.hours and invoice.sum are  
always doubled!
In my letter setup, it’s even quadrupled!
I guess my functions gets called several times, but how can I avoid  
that?

Greetlings from Lake Constance!
Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

Re: [NTG-context] Learning LuaTeX : Invoice

Henning Hraban Ramm