Almost got it figured out....

HiseSnippet 1609.3oc6ZE0aaaCDVJIrK1qtXcnOrWFfPwFfKVWpsSZ6FJFpSbZ5BVSiWbZ2vJ1JXjocHpLo.EsW7JJv90rm2Og9Sp+C1NRIYQ4X6Hk5zs0Y8PPHOdG+3cGO9QlzTvcIAAbgkcgCG5SrruLp0Pl73FGioLqc21xdUjjDHcpYs0PebP.osks8xOTI0tvJV5u2b+svdXlKIoKKqmxotjGQ6QkI81r92Q871A2lbHsmwn2n9ttbVCtGuOfjkQUr7wtu.2k7XrZXKgrrQOnMUxEsjX.NV1qrEu8vVGy+UV33eJMfdjGQ0npUKvPgcuC2qsBwpdsZbL0qcy3Ubfkk8kZlr9WNb8eMzdz1zQ8m3G9Hs.mDML8G1KMK3U0DdUxN7rMf2Jgv6pnVtBpuLQhBaeHZWljH5fgPfIrBGq0R+wpnFbXDL4Z8vufri.ZLRix2tRka5rdkJ23dkJVpHDHfv8.rvoEtmuGQ37MNwJ2kHav64yYPixWOR90U5cJspcVpUaL8ToTSUGkvwFeS7zGNHaxnZlShwXlr1yZJSFxT7GYYpqM84tVFl7Zwydoh25VtBBjK5fEB7vfIFXaQ7Htxs5Kkb1lpgA1W+8rREcx32YjYby4jkfjkrYoe9dm43L8DpIUv8ljm3s1IDFKeq8.5X5ExhWAvVdz1DQpn+bLAXN4BRu6Xt4KNkCAb0Wr9Ccrbt4NluYFQdiYJjx7nLhSm9LWIkybNRuioA1y6H375xtwX7lf6zqOA.2KCsHsS43dTMeYx73wcwdNTVaxIfCeZUlVSOf86jLE2XrUjJ9MLp.4j1Qe1VHoEXi.tGYMeAE72ZEMGbZwCiE8pREekpNaohc3hxXXMM0kSja.uVfJvpA7HmXZeZrwML5zVg4ynihgb1i4Rx9rx2n3KKVn3qNkjNcljnnY.VcSRphdmXFpUl0u2QDQbdRz3.VNooQglNMJSVdtgaSLFHmsKiJ22mvlF4Jqn8V.MqUi.ELTolj0UhHYE5bsn.WpBnnXokFwlbesxf5EiUu135GgjyP+KgzLtizEYmU8PHnHQNfbX4OspkPFEwyApMLwkQI08NeV3JHyZ+mOaLZgTaxv3I6tMVhUzsiRIfzDehPRUYf1aSF.2iIj7cAz1jfWH495blnxHfSNCYMmjLkWu9vQMdMut.2lxenf22erHTFruQZUxDT2c9MAQ4cIF2Ivv3+92NQiaUOaFOL4bJ1t9ujeaO0rWCmyOYNGOs9.yKlkMSmJq1vxOyvxVe+4wxiksmX6W+Cld88OO1N8tfSL8AFlt4Xl9zW.EtFLuceOrL8ciU.NR.TnO0kPUWzjEPkCMS+tPtvbVg6UQMoR2imLdWZB3EJNbQi2nmenD5Ac5.mqm.1UP67iW7u0fIT9zPn7wnVR3Nj8nrtwUwT3Iol1b3Ag7y7CB0TP7331sn+lwvdc8s5CtKQ5d+y55oZyd79rTyUDvOf3CWMFh9DSgGbftTy3Z8l6qyUNT.7l.Ogof8YDvsKMWiMD7ffNvxQaq.SQM6K5p7UI8b.Y.QDjtuG2uGD5YLhmh9is5f9mDPTgZp6dXofdh4n0yRkCw5v8mipswZo+FrO7iNeg5W+5F51gpTM+pTK+prd9UYi7qxsyuJ2I+pb2boRXh1dX+I91keP1X0BpCkpIdFibKZWCSq5wbW8njOMVMdbz+y8xmu6N2Y4rA2y3wYKDiwVTUz4ArAPwJnmvCa1lzA22SNpWSPtGmw8OlyntoqL.6z61kHLg9DWOaJkPgojdtV8Cf6EhCLJs8Y0eDbocrHcAub4JplcWwrBWeBJDtNph8NuePWX4+2SWXVttXFsNvrKj+KONeYjtTuihNx+TP8.deIPyH9ndDvGnEvAxkXxJXIESiv1UheMfVDVaci+B9hDVMlBgRX0XgVtwlBVaQ+t9Fv1KSXpSNzrf8.xIdlozA.SKEjfCzrBzA0dpCgVQ44f9ZgGPBqvDhmoRmZOpaSN3Lg8QphNn6kCtmF2288Ixmyvasf74BxmKHetf74BxmKHetf74BxmKHeNuIe9tXQ2C6J3O2M7uUkZouptG.AL8+faEP6oZ6TM9OOkJX0CN264ttpcUeIDtlrF0xsFqmaM1H2Zb6bqwcxsF2M2Z7UyPCEIiM6K48BqwZY82.KOFiSB

@d-healey said in Print array index:

This line GainSliderArray.showControl(index); Where is index coming from?

I thought:

local index = SamplerSelectButtonArray.indexOf(component);

Is that only available in my buttonCallback function?

oops! That worked

@d-healey Just tried to load this up.
got:

michaelasHarp-master\Scripts\HISE-Scripting-Framework\libraries\uiFactory.js not found

I'm trying to get familiar with using an index to show/hide controls, but it's not clicking in my brain yet... Also my first time using radiogroups.
As a test, I have a simple instrument with 2 samplers. The user interface has buttons (in radiogroup) to select each sampler, and a second set of buttons (in separate radiogroup) to show/hide controls of the samplers.

All buttons have been put into associated arrays, I've created a Callback function for the buttons, and I'm using the onControl section to show/hide content.

What I'm attempting to do is use the index of my SamplerSelectButtonArray to show/hide knobs in the GainSliderArray or PanSliderArray.
Any thoughts are appreciated.

Content.makeFrontInterface(500, 300);

const var Sampler = Content.getComponent("Sampler");
const var Sampler2 = Content.getComponent("Sampler2");
const var Gain = Content.getComponent("Gain");
const var Pan = Content.getComponent("Pan");
const var SamplerGain = Content.getComponent("SamplerGain");
const var SamplerPan = Content.getComponent("SamplerPan");
const var Sampler2Gain = Content.getComponent("Sampler2Gain");
const var Sampler2Pan = Content.getComponent("Sampler2Pan");

//create arrays

const var SamplerSelectButtonArray =      [
                                        Content.getComponent("Sampler"),
                                        Content.getComponent("Sampler2")
                                    ];
                               
const var ControlSelectButtonArray = [
                                        Content.getComponent("Gain"),
                                        Content.getComponent("Pan")
                                    ];
                               
const var GainSliderArray =         [
                                        Content.getComponent("SamplerGain"),
                                        Content.getComponent("Sampler2Gain")
                                    ];
                                    
const var PanSliderArray =         [
                                        Content.getComponent("SamplerPan"),
                                        Content.getComponent("Sampler2Pan")
                                    ];
                                    
                           
inline function buttonCallback(component, value)
{
    if(value)
    {
        local index = SamplerSelectButtonArray.indexOf(component);
            var y = ControlSelectButtonArray.indexOf(component);
            
        Console.print(index);
        Console.print(y);
    }
}


for(a in SamplerSelectButtonArray)
    a.setControlCallback(buttonCallback);
    
for(a in ControlSelectButtonArray)
    a.setControlCallback(buttonCallback);
function onNoteOn()
{
	
}
function onNoteOff()
{
	
}
function onController()
{
	
}
function onTimer()
{
	
}
function onControl(number, value)
{
	 if(number == Gain)
    {
        GainSliderArray.showControl(index);
    }
    else if (number == Pan)
    {
        PanSliderArray.showControl(index);
    }
}

@d-healey I was wondering this as well. Thanks for the pic!

@christoph-hart thank you!
More noob questions on the way.... although I'm trying to figure them out on my own

Content.makeFrontInterface(600, 500); 
const var Keyboard = Content.addFloatingTile("Keyboard", 0, 426); 
// [JSON Keyboard] 
Content.setPropertiesFromJSON("Keyboard", { "width": 600, "height": 72 });
 // [/JSON Keyboard] 
Keyboard.setContentData({"Type": "Keyboard"});