OK, I started off with a simpler example, just an addition of 2 numbers. I know this should be pretty close to the correct setup by looking at other Javascript examples, but it just does not work jet. Any suggestions
 
Thanks
Jeroen
 
 

\startJSpreamble {Calculate} used now

function Calculate ()

{ v = getField("textC") ; v.value = 0 ;

v.value += AFMakeNumber(getField("textA").value) ;

v.value += AFMakeNumber(getField("textB").value) }

\stopJSpreamble

 

\starttext

 

\setupfield

[lineABC]

[label,frame,horizontal]

[frame=off]

[height=18pt,width=15em,align=middle,frame=off]

[height=18pt,width=20em,align=right,style=\tfx,,frame=on]

 

\definefield[textA] [line] [lineABC] [] []

\definefield[textB] [line] [lineABC] [] []

\definefield[textC] [line] [lineABC] [] []

 

\startJScode{Calculate}

AFSimple_Calculate("SUM", new Array ("textA", "textB"));

\stopJScode

 

Calculate the addition: A + B = C

\\

\field[textA][Please enter A]

\\

\field[textB][Please enter B]

\\

\goto{Calculate the Result}[JS(Calculate)]

\\

\field[textC][The Calculation Result C = ]

 

\stoptext
 

From: jeroen.muskee@hotmail.com
To: ntg-context@ntg.nl
Date: Sat, 21 Nov 2009 14:19:03 +0100
Subject: [NTG-context] Fields and JS Calculations

I want to calculate the pressure of a hydrostatic fluid column with p(psi)=0.052*density(lb/gal)*depth(ft)
I have created a form with fields to enter the input, but I need somehow to pass the information entered to the JS calculation to display the result.
How can you pass an entered field value to JS caluclation and show the result into another field.
 
Thanks
Jeroen
 
 
 
\setupcolors[state=start]

\setupinteraction[state=start]

 

\starttext

 

\definefield[textdensity] [line] [linedensity] [] []

\definefield[textdepth] [line] [linedepth] [] []

\definefield[textpressure] [line] [linepressure] [] []

 

\setupfield

[linedensity]

[label,frame,horizontal]

[frame=off]

[height=18pt,width=15em,align=middle,frame=off]

[height=18pt,width=20em,align=right,style=\tfx,,frame=on]

 

\setupfield

[linedepth]

[label,frame,horizontal]

[frame=off]

[height=18pt,width=15em,align=middle,frame=off]

[height=18pt,width=20em,align=right,style=\tfx,,frame=on]

 

\setupfield

[linepressure]

[label,frame,horizontal]

[frame=off]

[height=18pt,width=15em,align=middle,frame=off]

[height=18pt,width=20em,align=right,style=\tfx,,frame=on]

 

\startJScode{presscalc}

pressure=0.052*density*depth;

\stopJScode

 

Calculate the hydrostatic pressure in psi with p = 0.05194 x density x depth

\blank

\field[textdensity][Please enter Density (lb/gal):]

\blank

\field[textdepth][Please enter Depth (ft):]

\blank

\goto{Calculate Pressure}[JS(presscalc)]

\blank

\field[textpressure][Hydrostatic Pressure (psi):]

 

\stoptext


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