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Add gtk_tree_model_iter_previous() vfunc

Browse Source 
https://bugzilla.gnome.org/show_bug.cgi?id=128058
This commit is contained in:
Szilárd Pfeiffer
2011-01-05 23:39:11 -05:00
committed by Matthias Clasen
parent 072023e57b
commit 8219ed3a26
10 changed files with 340 additions and 6 deletions
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53
gtk/gtktreemodel.c
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@ -1180,6 +1180,59 @@ gtk_tree_model_iter_next (GtkTreeModel *tree_model,
return (* iface->iter_next) (tree_model, iter);
}
static gboolean
gtk_tree_model_iter_previous_default (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
gboolean retval;
GtkTreePath *path;
path = gtk_tree_model_get_path (tree_model, iter);
if (path == NULL)
return FALSE;
retval = gtk_tree_path_prev (path) &&
gtk_tree_model_get_iter (tree_model, iter, path);
if (retval == FALSE)
iter->stamp = 0;
gtk_tree_path_free (path);
return retval;
}
/**
* gtk_tree_model_iter_previous:
* @tree_model: a #GtkTreeModel
* @iter: (inout): the #GtkTreeIter
*
* Sets @iter to point to the previous node at the current level. If there
* is no previous @iter, %FALSE is returned and @iter is set to be invalid.
*
* Return value: %TRUE if @iter has been changed to the previous node
*
* Since: 3.0
*/
gboolean
gtk_tree_model_iter_previous (GtkTreeModel *tree_model,
GtkTreeIter *iter)
{
gboolean retval;
GtkTreeModelIface *iface;
g_return_val_if_fail (GTK_IS_TREE_MODEL (tree_model), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
iface = GTK_TREE_MODEL_GET_IFACE (tree_model);
if (iface->iter_previous)
retval = (* iface->iter_previous) (tree_model, iter);
else
retval = gtk_tree_model_iter_previous_default (tree_model, iter);
return retval;
}
/**
* gtk_tree_model_iter_children:
* @tree_model: A #GtkTreeModel.