QML reference to number in Loader

[poucz]

Hello,

How to assign reference - not value to Comoponent?

I have simple code where Im using Loader..
I using two components, first is for GPIO variable, and second is for bit's in GPIO variable.
When I click on bit (button) - I need propagate change to global VarGpioPP_OUT.
How to put reference to component in cascade??

Thank you

import QtQuick 2.0

Page{
    property int varGpioPP_OUT:  4

    Column{
        Text{ text:"PP Out:"+varGpioPP_OUT}
        Loader{
            sourceComponent: gpioComponent
            onLoaded: item.gpio = varGpioPP_OUT;
        }
    }

    Component{
        id: gpioComponent
        Row{
            id: gpioPPOUT
            property int gpio
            onGpioChanged: {
                for (var i = 0; i < gpioRepeater.count; i++) {
                    gpioRepeater.itemAt(i).item.gpio =gpioPPOUT.gpio; //Need put reference NOT value!, without this gpioDelegat has no value.
                }
            }

            Repeater{
                id: gpioRepeater
                model: 8
                Loader {
                    sourceComponent: gpioDelegat
                    onLoaded: {
                        item.gpio = gpioPPOUT.gpio;
                        item.index = index;
                    }
                }
            }
        }
    }

    Component{
        id: gpioDelegat
        StandardBTN{
            property int gpio
            property int index
            width: 80
            text: gpio&(0x01<<index) ? 1:0
            onClicked: {
                gpio ^= (0x01<<index);
            }
        }
    }
}