Re: [gtkmm] multiple selections on TreeView

[Daniel Elstner <daniel elstner gmx net>]

Am Fre, 2002-11-22 um 22.56 schrieb Daniel Elstner:
> > 
> > For me it looks like I can't call erase in on_remove_selection() as this
> > possible invalidates the iterator. If this is true is there any other way
> > to remove multiple selections? Or I'm tottaly wrong here?
> 
> Yes, that's right.  It's a limitation of the underlying GTK+ interface. 
> You have to do something along these lines:

[...]

Uhm, that was nonsense.  Sorry.

Of course you can't store the paths just like that since they would
point to different rows if you remove a row (paths use indices).

Possible solutions would be:

a) use TreeRowReference objects (complicated)

b) sort the list of paths and remove the rows in reversed order from
bottom to top (simple, since Gtk::TreePath has operator<())

c) call get_selected()->selected_foreach() multiple times and remove the
first selected iter/path in each iteration (complicated, since
selected_foreach() unfortunately doesn't support the boolean return
value "continue", like TreeModel::foreach() does)

I'd go for b).  The sorting should be quite simple -- just call
selected_.sort() and use reverse iterators.  I reckon b) is the fastest
way too.

Sorry for misleading you,
--Daniel