The source for your Pie chart Label
is always the source property set via valueProperty.
As basically the PieChart is the actual graph that renders the pie slices based on that value, we might think of the slices as
the data points in the Line series or in the Scatter series. That said there is no option at that very moment to render other value than the valueProperty used to create the PieChart from its value source. We can always use both legendView
and style them accordingly. An advanced styling of PieChart series can be found here
Meanwhile, you can post a feature request in this repository
so that the developer's team can take a look at it and determine if such functionality can be achieved.