From 08b5b5fc82cae92bc167cf372412c7960bb0bfcc Mon Sep 17 00:00:00 2001
From: Pino Toscano <pino@kde.org>
Date: Sat, 7 Feb 2009 16:14:44 +0000
Subject: [PATCH] Properly keep the vertical position on horizontal resize.
 BUG: 183475

svn path=/trunk/KDE/kdegraphics/okular/; revision=922822
---
 ui/thumbnaillist.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/ui/thumbnaillist.cpp b/ui/thumbnaillist.cpp
index b32ef41b6..35fe76eed 100644
--- a/ui/thumbnaillist.cpp
+++ b/ui/thumbnaillist.cpp
@@ -526,14 +526,15 @@ void ThumbnailListPrivate::viewportResizeEvent( QResizeEvent * e )
 
         // update scrollview's contents size (sets scrollbars limits)
         newHeight -= KDialog::spacingHint();
+        const int oldHeight = q->widget()->height();
+        const int oldYCenter = q->verticalScrollBar()->value() + q->viewport()->height() / 2;
         q->widget()->resize( newWidth, newHeight );
 
         // enable scrollbar when there's something to scroll
         q->verticalScrollBar()->setEnabled( q->viewport()->height() < newHeight );
 
-        // ensure selected item remains visible
-        if ( m_selected )
-            q->ensureVisible( 0, m_selected->pos().y() + m_selected->height() / 2, 0, q->viewport()->height() / 2 );
+        // ensure that what was visibile before remains visible now
+        q->ensureVisible( 0, int( (qreal)oldYCenter * q->widget()->height() / oldHeight ), 0, q->viewport()->height() / 2 );
     }
     else if ( e->size().height() <= e->oldSize().height() )
         return;