Re: Unexplainable crashes with GtkTreeModelSort

On Monday 19 January 2004 02:13, Dimitar Haralanov wrote:

      I think that I might have found where the problem stems from...
According to the documentation, gtk_tree_path_next advances the path
pointer to the next path. However, it never checks whether it is valid
or even exists. Therefore, when I use gtk_tree_model_get_iter
with the invalid path, I get a crash.

      Considering that this is not the behaviour of gtk_tree_path_prev, I
consider this to be a major bug in GTK.

      If this is not a bug but an intended feature, please, someone tell me
how to guard against using invalid paths...

Check the return value of gtk_tree_model_get_iter(). If it is TRUE, the path 
was valid, if it is FALSE, the path doesn't exist.

Or use iters from the start and then gtk_tree_model_iter_next() (with checking 
the return value).

gtk_tree_path_next() and _prev() cannot check whether a tree path is valid, 
because they are not bound to a specific model. gtk_tree_path_prev() also 
doesn't check whether a row really exists (you can construct an arbitrary new 
tree path and then do _prev() and still get an invalid tree path), it just 
returns FALSE if it's at the first node at the current depth already.


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]