Selecting text in a GtkTreeView widget

[Alban Deniz <adeniz baker-research com>]

Hello,

I would like to be able to select some text in a GtkTreeView cell
(G_TYPE_STRING) with the left mouse button, and past it into another
application (such as emacs) with the middle mouse button.

Can anyone tell me how to do this?  Right now, when I click on a GtkTreeView
cell, the entire row is selected.  Making the cell editable does allow me
to select and paste, but I don't want the text to be editable.

Thanks,
Alban