Fix ColorProvider
option is only called for the root level
#150
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The TreeView visualization supports a custom
ColorProvider
function that allows third-party users to configure the color's that are assigned to each node. Because of a bug, this function was only called for each node at the first two levels. This PR proposes a new fix, that is also backwards compatible, in which users need to specify until which depth in the tree this function needs to be computed.I introduced a new option
ColorProviderLevels
that is now also taken into account during the visualization of the provided data and that allows to create treeviews like these: