Can I change the color 1 checkbox from a group of mutually exclusive checkboxes with 0-based index ?

[ls_rbls]

How can I access the 0-based index of an individual radio button or check box widget for a field that belongs to a mutually exclusive group of checkboxes?

All the SDK documentation that I've read doesn't  illustrate with a clear example of how to work around this if you use .fillColor  or  readonly .

Can anyone confirm if this is a field versus widget attributes issue?

In the script below, the condition works perfectly when I use the  checkThisBox parameter, for example.

However, I can't figure out how to achieve the same results with fillColor and readonly.

Here's my script example:

//I hve three mutually exclusive checboxes acting like radio buttons
//each checkbox has export values assigned like "myCheckbox 0", "myCheckbox 1", "myCheckbox 2"

// var g is a dropdown depending on what is selected the conditions below should be met

var g = event.value;
var f =  this.getField("myCheckbox");

if ((g =="True") || (g =="False") || (g =="Don't Know"))  {

f.checkThisBox(2, true); 
f.readonly =  true;
f.fillColor = color.red


}  else {


f.checkThisBox(2, false);
f.readonly = false;
f.fillColor = color.transparent


}

So basically I was looking for  if there's something that should be called like this:

f[2].fillColor = color.red;

f.fillColor(2) = color.red; 

In the form that I am working on I can't have all those other widgets turn red, just the checkbox that gets checked from the condition that is met when the user selcts certain listed items from the pulldown menu.

What am I missing?

Where can I find the appropriate documentation to achieve this? 

[ls_rbls · Accepted solution]

I just found the answer for the fillColor.

The appropriate reference is in the Acrobat SDK, Developing Acrobat Applications Using JavaScript guide.

For anyone who has the same question look in  Page 81  "Setting Acrobat form field properties"   specifically in the "Radio button fields" section Example 6.3 - Accessing individual radio button widgets

In the script below, this line this.getField(f.name+".2").fillColor = ["G",0.7];   resolves this issue for the color. I am still looking for the readonly attribute.

var g = event.value;
var f =  this.getField("testwithCB");
var f1 = this.getField(f.name+".2");
if ((g =="A") || (g =="B") || (g =="C"))  {

f.checkThisBox(2, true); 
this.getField(f.name+".2").fillColor =  ["G",0.7]; 


}  else {


f.checkThisBox(2, false);
f.readonly = false;
f.fillColor = ["RGB",0.874,0.874,1];


}