Domoticz text values in a Dashticz X-Y graph.

[danko]

In the Dashticz manual, chapter: Graphs-Examples-Combine two temperature devices with the switch info indicating central heating is on there is a X-Y graph showing when the central heating is on.
My question is: How do you get text values from Domoticz in such a graph? And how is it translated to a scale from 0 - 100?
The config file is abreviated and does not show how it is done. Or am I missing something?

[Lokonli]

Text values are not supported at the moment. Only 'data'-devices and switches.

Selector switches are also supported.

Can you sketch how you would like to draw a graph of a text device?