Gtk.Treeview deselect row via signals and code

Question

I'm using PyGObject but I think this is a question that could be adapted to all GTK, so if someone know how to do it using C or anything should work in python also.

I have two treeview, Active and Inactive, I load data from a Sqlite database and I can swap and drag & drop items from one to other. This is just an aestetic thing, if I click on one item on one treeview I want that a previous selected item on the other be deselected.

It appears that nobody had to do something similar because I didn't found anything about it on the net.

Answer 1

At the risk of being too basic (perhaps I misunderstand the problem), to manipulate treeview selections, you use the GtkTreeSelection object returned from GtkTreeView.get_selection. You can attach to signals on this object, change the current selection,etc.

Answer 2

To turn off selection in the other view, you can get its selection mode property and set to GTK_SELECTION_NONE. To turn it back on upon clicking, my thought was that you could catch a grab-focus signal, set the selection mode to single in that view, and set the selection mode to none in the other view:

 (connect view-1 'grab-focus
       (lambda args
         (set-mode (gtk-tree-view-get-selection view-1) "GTK_SELECTION_SINGLE")
         (set-mode (gtk-tree-view-get-selection view-2) "GTK_SELECTION_NONE")))

(That code is using the guile-gnome wrapper but the concept should be the same in any language binding.) A problem with this approach is that now in order to make a selection you must click the tree view twice - once to grab the focus, and again to make the selection.