From: asl <asl@opencascade.com>
Date: Wed, 20 Sep 2017 11:34:07 +0000 (+0300)
Subject: refs #1322: the zoom activated Ctrl+Left button is also centered by mouse position
X-Git-Tag: v2.1~6
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=9ef29388e7930784213a4c96a0596c3e9fc46934;p=modules%2Fgui.git

refs #1322: the zoom activated Ctrl+Left button is also centered by mouse position
---

diff --git a/src/GraphicsView/GraphicsView_ViewPort.cxx b/src/GraphicsView/GraphicsView_ViewPort.cxx
index dac64f7ce..40086a4f8 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.cxx
+++ b/src/GraphicsView/GraphicsView_ViewPort.cxx
@@ -850,6 +850,11 @@ void GraphicsView_ViewPort::zoom( double theX1, double theY1, double theX2, doub
   aTransform.scale( aZoom, aZoom );
   double aM11 = aTransform.m11();
   double aM22 = aTransform.m22();
+
+
+  QGraphicsView::ViewportAnchor old_anchor = transformationAnchor();
+  setTransformationAnchor( QGraphicsView::AnchorUnderMouse );
+
   // increasing of diagonal coefficients (>300) leads to a crash sometimes
   // at the values of 100 some primitives are drawn incorrectly
   if( qMax( aM11, aM22 ) < 100 )
@@ -858,6 +863,8 @@ void GraphicsView_ViewPort::zoom( double theX1, double theY1, double theX2, doub
   myIsTransforming = false;
 
   applyTransform();
+
+  setTransformationAnchor( old_anchor );
 }
 
 //================================================================