How to pass a QML ListModel to C++ function

[cmessineo]

I have a ListModel in QML:

ListModel{
        id: data
        ListElement
        {
            x: 10
            y: 20
            count: 18
        }
}
 
function draw(){
    ctx.drawIntensityMap(data);
}
 
 
//********** c++ code
 
void Context2D::drawIntensityMap(QVariantList data)
{
    ....
}

ListModel{
        id: data
        ListElement
        {
            x: 10
            y: 20
            count: 18
        }
}

function draw(){
    ctx.drawIntensityMap(data);
}


//********** c++ code

void Context2D::drawIntensityMap(QVariantList data)
{
    ....
}

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The model just gets populated with x,y,count data via javascript. After it gets populated I want to pass it to my c++ function so I can draw a HeatMap with QPainter.
I can't figure out how to pass the data to my C++ function.

Would I have to pass it as a QVariantList? If so how would I get to the data in C++.

Thanks