From 5e337ede0d2247b347814366899cf09e71393dab Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Thu, 28 Mar 2019 18:22:44 +0300
Subject: [PATCH] #16755 [CEA 16749] Merge nodes generates fatal error if
 selection is disabled

---
 src/SMESHGUI/SMESHGUI_MergeDlg.cxx | 16 +++++++++++++++-
 src/SMESH_I/SMESH_PythonDump.cxx   |  4 ++--
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/SMESHGUI/SMESHGUI_MergeDlg.cxx b/src/SMESHGUI/SMESHGUI_MergeDlg.cxx
index f7977d196..b269e2a47 100644
--- a/src/SMESHGUI/SMESHGUI_MergeDlg.cxx
+++ b/src/SMESHGUI/SMESHGUI_MergeDlg.cxx
@@ -1144,6 +1144,9 @@ void SMESHGUI_MergeDlg::SetEditCurrentArgument()
 //=================================================================================
 void SMESHGUI_MergeDlg::SelectionIntoArgument()
 {
+  if ( myIsBusy )
+    return;
+
   if (myEditCurrentArgument == (QWidget*)LineEditMesh)
   {
     QString aString = "";
@@ -1222,6 +1225,9 @@ void SMESHGUI_MergeDlg::SelectionIntoArgument()
 
     LineEditMesh->setText( aString );
 
+    
+    myIsBusy = true; // here selection can change
+
     if (myAction == MERGE_NODES) {
       SMESH::SetPointRepresentation(true);
       if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
@@ -1231,6 +1237,8 @@ void SMESHGUI_MergeDlg::SelectionIntoArgument()
       if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
         aViewWindow->SetSelectionMode(CellSelection);
 
+    myIsBusy = false;
+
     // process groups
     myGroups.clear();
     ListExclude->clear();
@@ -1408,9 +1416,11 @@ void SMESHGUI_MergeDlg::onTypeChanged (int id)
 
     myIdPreview->SetPointsLabeled(false);
     SMESH::SetPointRepresentation(false);
+    myIsBusy = true; // keep currently selected mesh
     if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
       aViewWindow->SetSelectionMode(ActorSelection);
     mySelectionMgr->clearFilters();
+    myIsBusy = false;
     GroupCoincident->hide();
     GroupEdit->hide();
 
@@ -1424,6 +1434,7 @@ void SMESHGUI_MergeDlg::onTypeChanged (int id)
 
     myMeshOrSubMeshOrGroupFilter = new SMESH_TypeFilter (SMESH::IDSOURCE);
 
+    myIsBusy = true; // keep currently selected mesh
     if (myAction == MERGE_NODES) {
       SMESH::SetPointRepresentation(true);
       if ( SVTK_ViewWindow* aViewWindow = SMESH::GetViewWindow( mySMESHGUI ))
@@ -1435,11 +1446,14 @@ void SMESHGUI_MergeDlg::onTypeChanged (int id)
         if( mySelector->IsSelectionEnabled() )
           aViewWindow->SetSelectionMode(CellSelection);
     }
+    myIsBusy = false;
     GroupCoincident->show();
     GroupEdit->show();
     break;
   }
-  SelectionIntoArgument();
+
+  if ( myMesh->_is_nil() )
+    SelectionIntoArgument();
 
   updateControls();
 
diff --git a/src/SMESH_I/SMESH_PythonDump.cxx b/src/SMESH_I/SMESH_PythonDump.cxx
index aa35dc0a5..5c9163bf4 100644
--- a/src/SMESH_I/SMESH_PythonDump.cxx
+++ b/src/SMESH_I/SMESH_PythonDump.cxx
@@ -1009,9 +1009,9 @@ TCollection_AsciiString SMESH_Gen_i::DumpPython_impl
   
   lines.push_back(  aSMESHGen + " = smeshBuilder.New()" );
   if ( isPublished )
-    optionalComment = helper + "#";
+    optionalComment = "#";
   lines.push_back( optionalComment + aSMESHGen + ".SetEnablePublish( False ) # Set to False to avoid publish in study if not needed or in some particular situations:" );
-  lines.push_back( "                                 # multiples meshes built in parallel, complex and numerous mesh edition (performance)" );
+  lines.push_back( "                                 # multiples meshes built in parallel, complex and numerous mesh edition (performance)\n" );
   lines.push_back( helper + "aFilterManager = " + aSMESHGen + ".CreateFilterManager()" );
   lines.push_back( helper + "aMeasurements = "  + aSMESHGen + ".CreateMeasurements()" );
 
-- 
2.30.2