Gridlines in Gtk2::TreeView

I am developing a Gtk2 perl app to view large amounts of hierarchical data. I use Gtk2::TreeView
to present the hierachical data. Its very useful to be able to click and go deeper down the tree.

But when the number of columns become large, it kind of becomes difficult for the user to see
which cell belongs to which column on the UI. He can easily identify the row, because clicking on
the cell highlights the entire row. But he cannot easily identify the column.

Is there a way I can get gridlines separating columns (and rows too, perhaps) using
Gtk2::Treeview. Like a spreadsheet, for example. Its much easier to spot which cell belongs to
which column that way.

Is this something that should be done using themes ?

Is there an alternate solution to my problem ?



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