Columns with no cursor on GtkTreeView

[Juan Pablo <jpdborgna yahoo com ar>]

Hi list.
I have a GtkTreeView with a lot of columns amd only some of them are
editable. It works fine.
What i want to do is that the cursor doesn't position over some of the
columns (the non editable ones) for practical use reasons.
Is there any property to set this or i have to make a funcion hooked on
cursor movement cheking current position and direction to set the new
destination?

Thanks!

Saludos, Juan Pablo.
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