Fix grouping-issue with not visible sorting roles

It must be assured that the data for a sorting role always is
determined even it is not shown as "additional info" in the view.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/kitemviews/kfileitemlistview.h b/src/kitemviews/kfileitemlistview.h
index 125c86142..d90d8ecf9 100644
--- a/src/kitemviews/kfileitemlistview.h
+++ b/src/kitemviews/kfileitemlistview.h
@@ -81,6 +81,7 @@ protected:
 
 protected slots:
     virtual void slotItemsRemoved(const KItemRangeList& itemRanges);
+    virtual void slotSortRoleChanged(const QByteArray& current, const QByteArray& previous);
 
 private slots:
     void triggerVisibleIndexRangeUpdate();
@@ -95,6 +96,14 @@ private:
     void updateTimersInterval();
     void updateMinimumRolesWidths();
 
+    /**
+     * Applies the roles defined by KItemListView::visibleRoles() to the
+     * KFileItemModel and KFileItemModelRolesUpdater. As the model does not
+     * distinct between visible and invisible roles also internal roles
+     * are applied that are mandatory for having a working KFileItemModel.
+     */
+    void applyRolesToModel();
+
 private:
     Layout m_itemLayout;