Re: [Glade-users] GtkListStore. (Multiple selection)

[martine cs washington edu]

On Thu, Oct 17, 2002 at 04:17:44PM -0700, Harring Figueiredo wrote:
> My problem is that, when using *foreach(); we cannot delete any rows
> because the remove() messes up the iter on the store/model.  Thus
> cuases some rows to not be deleted and sometimes gives some ugly
> error messages.

> I am trying to think of a way to mark the selectect rows -- and I
> guess I found a obscure way that works: Add a non-visible flag on the
> model, and on the foreach function, I set it to true (meaning it was
> selected -- after the foreach call is done, I loop through the model
> and remove the rows I had set.

I ran into this, too.

Another solution, that don't require modifying your model:

Iterate through every row, calling gtk_tree_selection_iter_is_selected()
on each.  Remember to start again from the beginning if you delete the
row (because your iterator is invalidated).

A coauthor suggested possibly building a GList of GtkTreePaths... 
though I doubt they continue to refer to the same element if you 
delete an element, so iterate through the GList backwards (or just
build it list in reverse)...  but that's ugly and heavy.


For my project, I tried a bunch of different options and then found the
fastest one:  use foreach_selected to mark every selected row in the
internal data structure that the treeview was showing, then clear the
treeview and repopulate it from the data structure.  It's lame, but it
works. :\

-- 
      Evan Martin
martine cs washington edu
  http://neugierig.org