From 4368978e9e79ea0a3c3e35308d7ad48371387d86 Mon Sep 17 00:00:00 2001
From: enk <enk@opencascade.com>
Date: Mon, 19 Jun 2006 09:28:18 +0000
Subject: [PATCH] Fix for Bug PAL12638: SIGSEGV 'segmentation violation'
 detected.

---
 src/VISUGUI/VisuGUI_CutPlanesDlg.cxx |  4 +++-
 src/VISUGUI/VisuGUI_Plot3DDlg.cxx    | 17 +++++++++++++----
 src/VISUGUI/VisuGUI_Prs3dTools.h     |  3 ++-
 src/VISUGUI/VisuGUI_ScalarBarDlg.cxx |  3 ++-
 4 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/src/VISUGUI/VisuGUI_CutPlanesDlg.cxx b/src/VISUGUI/VisuGUI_CutPlanesDlg.cxx
index 53647c48..78bfc6ac 100644
--- a/src/VISUGUI/VisuGUI_CutPlanesDlg.cxx
+++ b/src/VISUGUI/VisuGUI_CutPlanesDlg.cxx
@@ -421,7 +421,9 @@ void VisuGUI_CutPlanesPane::deletePlanes()
 {
   if (myPreviewActor == 0) return;
   vtkRenderer* aRend       = myPreviewActor->GetRenderer();
-  if(aRend)
+  vtkRenderWindow* aWnd = aRend->GetRenderWindow();
+
+  if(aRend && aWnd)
     myPreviewActor->RemoveFromRender(aRend);
 //  Bug IPAL11962: preview is still in the viewer, if viewer not active.
 //   if (SVTK_ViewWindow* vf = VISU::GetActiveViewWindow<SVTK_ViewWindow>())
diff --git a/src/VISUGUI/VisuGUI_Plot3DDlg.cxx b/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
index 04d78a4e..2ad6cf22 100644
--- a/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
+++ b/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
@@ -362,7 +362,12 @@ void VisuGUI_Plot3DPane::onPrsType(int id)
 //=======================================================================
 void VisuGUI_Plot3DPane::updatePreview()
 {
-  if (myInitFromPrs || !myPrs || !myViewWindow)
+  if(myPreviewActor){
+    vtkRenderer* aRend       = myPreviewActor->GetRenderer();
+    vtkRenderWindow* aWnd = aRend->GetRenderWindow();
+    if (!aWnd) return;
+  }
+ if (myInitFromPrs || !myPrs || !myViewWindow)
     return;
   bool fitall = false;
   if (PreviewChkB->isChecked()) // place preview plane
@@ -489,14 +494,18 @@ int VisuGUI_Plot3DPane::storeToPrsObject(VISU::Plot3D_i* thePrs)
 //=======================================================================
 bool VisuGUI_Plot3DPane::check()
 {
-  if (myPreviewActor && myViewWindow) // erase preview
-  {
+  if(!myPreviewActor) return true;
+  
+  SVTK_ViewWindow* aView;
+  vtkRenderer* aRend    = myPreviewActor->GetRenderer();
+  vtkRenderWindow* aWnd = aRend->GetRenderWindow();
+  if(aRend && aWnd){
     myPreviewActor->SetVisibility(false);
     myViewWindow->RemoveActor(myPreviewActor);
     myPreviewActor->Delete();
     myPreviewActor = 0;
   }
-
+    
   return true;
 }
 
diff --git a/src/VISUGUI/VisuGUI_Prs3dTools.h b/src/VISUGUI/VisuGUI_Prs3dTools.h
index 9050d5fd..62b46d51 100644
--- a/src/VISUGUI/VisuGUI_Prs3dTools.h
+++ b/src/VISUGUI/VisuGUI_Prs3dTools.h
@@ -194,12 +194,13 @@ namespace VISU
 	      delete aDlg;
 	    } else {
 	      DeletePrs3d(theModule,aPrs3d,theIO);
+	      QApplication::restoreOverrideCursor();
 	      delete aDlg;
 	      return false;
 	    }
 	}
       }
-
+      aViewWindow = GetViewWindow<TViewer>(theModule);
       // Display created presentation.
       if (aViewWindow) {
 	PublishInView(theModule, aPrs3d, aViewWindow, /*highlight = */true);
diff --git a/src/VISUGUI/VisuGUI_ScalarBarDlg.cxx b/src/VISUGUI/VisuGUI_ScalarBarDlg.cxx
index affe39ed..6131085e 100644
--- a/src/VISUGUI/VisuGUI_ScalarBarDlg.cxx
+++ b/src/VISUGUI/VisuGUI_ScalarBarDlg.cxx
@@ -746,7 +746,8 @@ void VisuGUI_ScalarBarPane::deleteScalarBar()
   
   if (myPreviewActor == 0) return;
   vtkRenderer* aRend       = myPreviewActor->GetRenderer();
-  if(aRend)
+  vtkRenderWindow* aWnd = aRend->GetRenderWindow();
+  if(aRend && aWnd)
     myPreviewActor->RemoveFromRender(aRend);
   myPreviewActor->GetScalarBar()->VisibilityOff();
   myPreviewActor->Delete();
-- 
2.39.2