From 9f821f384bdb3a64a824cd78ecd5c5e4aa5c0a87 Mon Sep 17 00:00:00 2001
From: Stephen Kelly <stephen.kelly@kdab.com>
Date: Wed, 22 Aug 2012 16:11:20 +0200
Subject: [PATCH] Optimize QAbstractItemModel::sibling a bit.

QModelIndex::sibling has a simliar optimization.

Change-Id: Ic0717d480ba0d46a4c0c88064bc9eda4c4ffe6f6
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
---
 src/corelib/itemmodels/qabstractitemmodel.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/corelib/itemmodels/qabstractitemmodel.h b/src/corelib/itemmodels/qabstractitemmodel.h
index 37d8ee6bab..eab489438c 100644
--- a/src/corelib/itemmodels/qabstractitemmodel.h
+++ b/src/corelib/itemmodels/qabstractitemmodel.h
@@ -172,7 +172,7 @@ public:
     virtual QModelIndex parent(const QModelIndex &child) const = 0;
 
     inline QModelIndex sibling(int row, int column, const QModelIndex &idx) const
-        { return index(row, column, parent(idx)); }
+        { return (row == idx.row() && column == idx.column()) ? idx : index(row, column, parent(idx)); }
 
     virtual int rowCount(const QModelIndex &parent = QModelIndex()) const = 0;
     virtual int columnCount(const QModelIndex &parent = QModelIndex()) const = 0;