From 45cbe170c90db6234acff5a7ec44c4e7a1a63fe3 Mon Sep 17 00:00:00 2001
From: scorpio810
 <scorpio810@r995  scorpio810  2010-05-20 11:17:04 +0200 (jeu. 20 mai 2010)>
Date: Sat, 10 Feb 2018 16:32:57 +0000
Subject: [PATCH] Fix scroll mouse to lower it can flips the diagram, thanks
 Gabberworld for this patch

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5235 bfdf4180-ca20-0410-9c96-a3a8aa849046
---
 sources/diagramview.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sources/diagramview.cpp b/sources/diagramview.cpp
index cc513d0df..c1f254fd1 100644
--- a/sources/diagramview.cpp
+++ b/sources/diagramview.cpp
@@ -289,7 +289,9 @@ void DiagramView::zoom(const qreal zoom_factor)
 		QSettings settings;
 		if (settings.value("diagrameditor/zoom-out-beyond-of-folio", false).toBool() ||
 			(horizontalScrollBar()->maximum() || verticalScrollBar()->maximum()) )
-			scale(zoom_factor, zoom_factor);
+			if (zoom_factor >= 0){
+				scale(zoom_factor, zoom_factor);
+			}
 	}
 	m_diagram->adjustSceneRect();
 	adjustGridToZoom();