Fill QML Chart with Data from C++

[HTWAMD]

Hey,

I did a simple Qt LineChart just like here in the example:
QML Line Chart

Now I want to pass data from C++ to the qml chart but how? :)
With a Listview I already did it with rootContext()->setContextProperty but it's not working with the chart (Maybe I'm doing something wrong...)

Edit// Found the Solution in the "QML Oscilloscope" example.