Fixed wheel zoom with QT (ticket #733)

diff --git a/modules/highgui/src/window_QT.cpp b/modules/highgui/src/window_QT.cpp
index 3727a64..78bc77b 100755 (executable)
--- a/modules/highgui/src/window_QT.cpp
+++ b/modules/highgui/src/window_QT.cpp
@@ -2511,7 +2511,7 @@ void ViewPort::scaleView(qreal factor,QPointF center)
 \r
 void ViewPort::wheelEvent(QWheelEvent *event)\r
 {\r
-       scaleView( -event->delta() / 240.0,event->pos());\r
+       scaleView( event->delta() / 240.0,event->pos());\r
        viewport()->update();\r
 }\r
 \r