Re: liststore issue 1 - iter points to wrong row after sort of column with cellrenderercombo

[Mike Martin <redtux1 gmail com>]

Thanks
Though what I don't quite get is the difference in behaviour between
editing-started and edited (both using path to get the ITER)
On my particular scenario I use editing-started to setup some stuff so I
can use the iter created

On Thu, 28 Feb 2019, 12:30 Nicolas Soubeiran via gtk-app-devel-list, <
gtk-app-devel-list gnome org> wrote:

> Hello,
> after you sort the model, you shall consider that all iter and path
> previously stored are wrong :
> A path is a representation of the position of the row in the current case
> (which you can read by using gtk_tree_path_to_string).
>
> https://developer.gnome.org/gtk3/stable/GtkTreeModel.html#gtk-tree-path-to-string
>
>  Iter are quite the same (but link to a particular GtkTreeModel), such as
> list::iterator of C++ STL : they are pointer to row that you can use to
> access to data or walk through the models.  You can make an iter from a
> path and a model :
>
> GtkTreePath *path;GtkTreeIter iter;
>
> GtkTreeModel* model;
>
> GtkListStore store = gtk_list_store_new(3, G_TYPE_INT,
> G_TYPE_STRING,G_TYPE_STRING)
>
> model = GTK_TREE_MODEL(store);
>
> path = gtk_tree_path_new_from_string
> <
> https://developer.gnome.org/gtk3/stable/GtkTreeModel.html#gtk-tree-path-new-from-string
> >
> ("3"); // third rowgtk_tree_model_get_iter
> <
> https://developer.gnome.org/gtk3/stable/GtkTreeModel.html#gtk-tree-model-get-iter
> >
> (model, &iter, path); // may be invalid (check return value)
>
>  If you really want to keep track of a particular row, you have to use
> GtkTreeRowReference
>
> https://developer.gnome.org/gtk3/stable/GtkTreeModel.html#GtkTreeRowReference
> But GTK will have to keep the reference up to date, so each time your
> model change (inserting, deleting, sorting...)
> GTK will triggered signal to update your GtkTreeRowReference which may
> cause an overhead in your application
>
> Hope this helps you to understand better the GtkTreeModel paradigm
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