(All versions) NodeIDClass

I am attempting to build my first PanelTreeView widget, and finding it extremely complex.  I have four columns that have no children and a varying number of rows.  The dialog will look something like this:

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x  FileName            x    FilePath     x          Command1    x   Command2   x

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x   Abc.indd            x  C:\def\xyz    x          relink             x  delete            x

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x  Ghi.indd              x  C:\def\xyz    x          relink             x  delete             x

and so on.

First of all, since listbox is going to be deprecated some day, I am trying to follow the documentation's recommendation that I replace it with a panel tree view.

Is a panel tree view the best widget to use?  Is there a simpler widget since I don't need to expand any rows?

If paneltreeview is the best widget to use, then I have a whole bevy of questions, but for now I will ask just this one:  In the PanelTreeView sample, it creates a custom nodeid class inheriting from NodeIDClass, which is essentially a pure virtual class.

In that class, they have two functions: Read() = 0 and Write() = 0, but they don't indicate what the reading and writing is for so I don't have a clue as to what they are used for except for a vague sense that something gets read/written.  Does anyone have a clue as to what those two pure virtual functions are for?

TIA!

R,

John