From 35da5c19fa70f4d246c5d3437b59ae644d43ef52 Mon Sep 17 00:00:00 2001
From: apo <apo@opencascade.com>
Date: Thu, 10 Nov 2005 11:50:01 +0000
Subject: [PATCH] Fix for Bug GVIEW10475 	flicker with point sprite
 representation

---
 src/SVTK/SVTK_MainWindow.cxx             |  1 +
 src/SVTK/SVTK_RenderWindowInteractor.cxx | 17 ++---------------
 src/SVTK/SVTK_RenderWindowInteractor.h   |  1 -
 3 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/src/SVTK/SVTK_MainWindow.cxx b/src/SVTK/SVTK_MainWindow.cxx
index f1b6867d9..c5e260cd7 100644
--- a/src/SVTK/SVTK_MainWindow.cxx
+++ b/src/SVTK/SVTK_MainWindow.cxx
@@ -84,6 +84,7 @@ SVTK_MainWindow
   SetEventDispatcher(myInteractor->GetDevice());
 
   setCentralWidget(myInteractor);
+  myInteractor->setBackgroundMode(Qt::NoBackground);
 
   myInteractor->setFocusPolicy(StrongFocus);
   myInteractor->setFocus();
diff --git a/src/SVTK/SVTK_RenderWindowInteractor.cxx b/src/SVTK/SVTK_RenderWindowInteractor.cxx
index 000d592f2..ecf0dda1d 100644
--- a/src/SVTK/SVTK_RenderWindowInteractor.cxx
+++ b/src/SVTK/SVTK_RenderWindowInteractor.cxx
@@ -68,16 +68,14 @@ static int MYVTKDEBUG = 0;
 #endif
 
 static bool GENERATE_SUIT_EVENTS = false;
-static bool FOCUS_UNDER_MOUSE = false;
 
 
 //----------------------------------------------------------------------------
 QVTK_RenderWindowInteractor
 ::QVTK_RenderWindowInteractor(QWidget* theParent, 
 			      const char* theName):
-  QWidget(theParent,theName),
-  myRenderWindow(vtkRenderWindow::New()),
-  myPreviousFocusWidget(NULL)
+  QWidget(theParent,theName,Qt::WNoAutoErase),
+  myRenderWindow(vtkRenderWindow::New())
 {
   if(MYDEBUG) INFOS("QVTK_RenderWindowInteractor() - "<<this);
   setMouseTracking(true);
@@ -226,9 +224,6 @@ void
 QVTK_RenderWindowInteractor
 ::mouseMoveEvent( QMouseEvent* event ) 
 {
-  if(FOCUS_UNDER_MOUSE && qApp->focusWidget() != this)
-    setFocus();
-
   GetDevice()->SetEventInformationFlipY(event->x(), 
 					event->y(),
 					event->state() & ControlButton,
@@ -317,11 +312,6 @@ void
 QVTK_RenderWindowInteractor
 ::enterEvent( QEvent* event )
 {
-  if(false && qApp->focusWidget() != this)
-    myPreviousFocusWidget = qApp->focusWidget();
-
-  QWidget::setFocus();
-
   GetDevice()->EnterEvent();
 }
 
@@ -330,9 +320,6 @@ void
 QVTK_RenderWindowInteractor
 ::leaveEvent( QEvent * )
 {
-  if(false && myPreviousFocusWidget)
-    myPreviousFocusWidget->setFocus();
-
   GetDevice()->LeaveEvent();
 }
 
diff --git a/src/SVTK/SVTK_RenderWindowInteractor.h b/src/SVTK/SVTK_RenderWindowInteractor.h
index 4d7e6ca95..bc0020ddf 100644
--- a/src/SVTK/SVTK_RenderWindowInteractor.h
+++ b/src/SVTK/SVTK_RenderWindowInteractor.h
@@ -119,7 +119,6 @@ class SVTK_EXPORT QVTK_RenderWindowInteractor: public QWidget
   //! To handle native X11 events (from such devices as SpaceMouse)
   virtual bool x11Event( XEvent *e );
 
-  QWidget* myPreviousFocusWidget;
   vtkSmartPointer<vtkRenderWindow> myRenderWindow;
   vtkSmartPointer<vtkGenericRenderWindowInteractor> myDevice;
 };
-- 
2.39.2