From 8fc1ced46f7ecaf237e5087660b7de22166be754 Mon Sep 17 00:00:00 2001
From: nds <nds@opencascade.com>
Date: Thu, 29 Dec 2016 14:00:14 +0300
Subject: [PATCH] ZFitAll leads to black screen of OCC viewer during rotation
 if gradient background mode is switched (#28304 issue in OCCT)

---
 src/OCCViewer/OCCViewer_ViewPort3d.cxx | 14 +++++++++-----
 src/OCCViewer/OCCViewer_ViewWindow.cxx |  6 ++++++
 2 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/src/OCCViewer/OCCViewer_ViewPort3d.cxx b/src/OCCViewer/OCCViewer_ViewPort3d.cxx
index ee51e0b4e..778c65b99 100755
--- a/src/OCCViewer/OCCViewer_ViewPort3d.cxx
+++ b/src/OCCViewer/OCCViewer_ViewPort3d.cxx
@@ -245,7 +245,9 @@ bool OCCViewer_ViewPort3d::syncronize( const OCCViewer_ViewPort3d* ref )
   /* update */
   tgtView->Update();
   tgtView->SetImmediateUpdate( Standard_True );
+#if OCC_VERSION_LARGE <= 0x06070100
   tgtView->ZFitAll();
+#endif
   return true;
 }
 
@@ -264,7 +266,9 @@ double OCCViewer_ViewPort3d::getZSize() const
 */
 void OCCViewer_ViewPort3d::setZSize( double zsize )
 {
+#if OCC_VERSION_LARGE <= 0x06070100
   myActiveView->SetZSize( zsize );
+#endif
   /*    if ( !myOrthoView.IsNull() )
         myOrthoView->SetZSize( zsize );
         if ( !myPerspView.IsNull() )
@@ -574,8 +578,8 @@ void OCCViewer_ViewPort3d::rotate( int x, int y,
 void OCCViewer_ViewPort3d::endRotation()
 {
   if ( !activeView().IsNull() ) {
-    activeView()->ZFitAll( 1.0 );
 #if OCC_VERSION_LARGE <= 0x06070100
+    activeView()->ZFitAll( 1.0 );
     activeView()->SetZSize( 0.0 );
 #endif
     activeView()->Update();
@@ -651,12 +655,12 @@ void OCCViewer_ViewPort3d::fitAll( bool keepScale, bool withZ, bool upd )
   
 #if OCC_VERSION_LARGE > 0x06070100
   activeView()->FitAll( margin, upd );
-  if(withZ)
-    activeView()->ZFitAll();
+  //if(withZ)
+  //  activeView()->ZFitAll();
 #else 
   activeView()->FitAll( margin, withZ, upd );
-#endif
   activeView()->SetZSize(0.);
+#endif
   emit vpTransformed( this );
 }
 
@@ -769,8 +773,8 @@ bool OCCViewer_ViewPort3d::synchronize( OCCViewer_ViewPort* view )
 #else
     aView3d->SetViewMapping( aRefView3d->ViewMapping() );
     aView3d->SetViewOrientation( aRefView3d->ViewOrientation() );
-#endif
     aView3d->ZFitAll();
+#endif
     aView3d->SetImmediateUpdate( Standard_True );
     aView3d->Update();
     blockSignals( blocked );
diff --git a/src/OCCViewer/OCCViewer_ViewWindow.cxx b/src/OCCViewer/OCCViewer_ViewWindow.cxx
index 282daceb7..a3c5b58db 100644
--- a/src/OCCViewer/OCCViewer_ViewWindow.cxx
+++ b/src/OCCViewer/OCCViewer_ViewWindow.cxx
@@ -406,7 +406,9 @@ bool OCCViewer_ViewWindow::eventFilter( QObject* watched, QEvent* e )
           int x1 = (int)( aEvent->x() + width()*delta/100 );
           int y1 = (int)( aEvent->y() + height()*delta/100 );
           myViewPort->zoom( x, y, x1, y1 );
+#if OCC_VERSION_LARGE <= 0x06070100
           myViewPort->getView()->ZFitAll();
+#endif
           emit vpTransformationFinished ( ZOOMVIEW );
         }
       }
@@ -1060,7 +1062,9 @@ void OCCViewer_ViewWindow::vpMouseReleaseEvent(QMouseEvent* theEvent)
 
   case PANVIEW:
   case ZOOMVIEW:
+#if OCC_VERSION_LARGE <= 0x06070100
     myViewPort->getView()->ZFitAll();
+#endif
     resetState();
     break;
 
@@ -3668,7 +3672,9 @@ void OCCViewer_ViewWindow::synchronize( SUIT_ViewWindow* theView )
 
   getViewPort()->setAxialScale( anAxialScale[0], anAxialScale[1], anAxialScale[2] );
 
+#if OCC_VERSION_LARGE <= 0x06070100
   aDestView->ZFitAll();
+#endif
   aDestView->SetImmediateUpdate( Standard_True );
   aDestView->Redraw();
 
-- 
2.39.2