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Correct handling of row-has-child-toggled signal

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When a filter function is used that determines the visibility property
of a node using whether or it it has children, the state of this node
very likely changes when the filter model receives a
row-has-child-toggled signal.  Therefore, we need to handle state
changes in the row-has-child-toggled handler.
This commit is contained in:
Kristian Rietveld 2009-09-02 12:45:41 +02:00
parent 6606989019
commit 733e532c59
1 changed files with 47 additions and 5 deletions
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52
gtk/gtktreemodelfilter.c
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@ -1576,6 +1576,7 @@ gtk_tree_model_filter_row_has_child_toggled (GtkTreeModel *c_model,
GtkTreeIter iter;
FilterLevel *level;
FilterElt *elt;
gboolean requested_state;
g_return_if_fail (c_path != NULL && c_iter != NULL);
@ -1589,8 +1590,9 @@ gtk_tree_model_filter_row_has_child_toggled (GtkTreeModel *c_model,
return;
}
if (!gtk_tree_model_filter_visible (filter, c_iter))
return;
/* For all other levels, there is a chance that the visibility state
* of the parent has changed now.
*/
path = gtk_real_tree_model_filter_convert_child_path_to_path (filter,
c_path,
@ -1601,12 +1603,52 @@ gtk_tree_model_filter_row_has_child_toggled (GtkTreeModel *c_model,
gtk_tree_model_filter_get_iter_full (GTK_TREE_MODEL (data), &iter, path);
gtk_tree_path_free (path);
level = FILTER_LEVEL (iter.user_data);
elt = FILTER_ELT (iter.user_data2);
g_assert (elt->visible);
gtk_tree_path_free (path);
requested_state = gtk_tree_model_filter_visible (filter, c_iter);
if (!elt->visible && !requested_state)
{
/* The parent node currently is not visible and will not become
* visible, so we will not pass on the row-has-child-toggled event.
*/
return;
}
else if (elt->visible && !requested_state)
{
/* The node is no longer visible, so it has to be removed.
* _remove_node() takes care of emitting row-has-child-toggled
* when required.
*/
level->visible_nodes--;
gtk_tree_model_filter_remove_node (filter, &iter);
return;
}
else if (!elt->visible && requested_state)
{
elt->visible = TRUE;
level->visible_nodes++;
/* Only insert if the parent is visible in the target */
if (gtk_tree_model_filter_elt_is_visible_in_target (level, elt))
{
path = gtk_tree_model_get_path (GTK_TREE_MODEL (filter), &iter);
gtk_tree_model_row_inserted (GTK_TREE_MODEL (filter), path, &iter);
gtk_tree_path_free (path);
/* We do not update children now, because that will happen
* below.
*/
}
}
/* For the remaining possibility, elt->visible && requested_state
* no action is required.
*/
/* If this node is referenced and has children, build the level so we
* can monitor it for changes.