From 65de7c2a91fa5246f227a7842c5f692a7d478aee Mon Sep 17 00:00:00 2001
From: vsr <vsr@opencascade.com>
Date: Fri, 12 Oct 2012 15:07:11 +0000
Subject: [PATCH] 0021905: EDF SMESH: Impossible to add a face without layers
 with "viscous layers"

---
 doc/salome/gui/SMESH/input/mesh_preferences.doc | 6 ++++++
 src/OBJECT/SMESH_PreviewActorsCollection.cxx    | 2 +-
 src/SMESHGUI/SMESHGUI.cxx                       | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/doc/salome/gui/SMESH/input/mesh_preferences.doc b/doc/salome/gui/SMESH/input/mesh_preferences.doc
index 1b1b2f96c..d2a6eb41f 100644
--- a/doc/salome/gui/SMESH/input/mesh_preferences.doc
+++ b/doc/salome/gui/SMESH/input/mesh_preferences.doc
@@ -98,6 +98,12 @@ number of segments on each edge</li>
 <li><b>Area precision</b> - allows to adjust input precision of mesh element area.</li>
 <li><b>Volume precision</b> - allows to adjust input precision of mesh element volume.</li>
 </ul>
+<li><b>Preview</b></li>
+<ul>
+<li><b>Sub-shapes preview chunk size</b> - allows to limit the number
+of preview sub-shapes shown in the hypotheses creation dialog boxes,
+for example "Reverse Edges" parameter of \ref number_of_segments_anchor "Number of segments" hypothesis. 
+</ul>
 <li><b>Python Dump</b></li>
 <ul>
 <li><b>Historical python dump</b> checkbox allows switching between 
diff --git a/src/OBJECT/SMESH_PreviewActorsCollection.cxx b/src/OBJECT/SMESH_PreviewActorsCollection.cxx
index b5e145cc5..9fecefb18 100644
--- a/src/OBJECT/SMESH_PreviewActorsCollection.cxx
+++ b/src/OBJECT/SMESH_PreviewActorsCollection.cxx
@@ -77,7 +77,7 @@ bool SMESH_PreviewActorsCollection::Init( const TopoDS_Shape& theShape,
   myMapOfShapes.Clear();
   myIndices.clear();
   myCurrentChunk = 0;
-  myChunkSize = mgr->integerValue( "SMESH", "preview_actor_chunk_size", 100 );
+  myChunkSize = qMax(1, mgr->integerValue( "SMESH", "preview_actor_chunk_size", 100 ) );
 
   if ( theShape.IsNull() )
     return false;
diff --git a/src/SMESHGUI/SMESHGUI.cxx b/src/SMESHGUI/SMESHGUI.cxx
index 10d66e8a7..b4c12d324 100644
--- a/src/SMESHGUI/SMESHGUI.cxx
+++ b/src/SMESHGUI/SMESHGUI.cxx
@@ -4751,7 +4751,7 @@ void SMESHGUI::createPreferences()
   int previewGroup = addPreference( tr( "SMESH_PREF_GROUP_PREVIEW" ), genTab );
   setPreferenceProperty( previewGroup, "columns", 2 );
   int chunkSize = addPreference( tr( "PREF_PREVIEW_CHUNK_SIZE" ), previewGroup, LightApp_Preferences::IntSpin, "SMESH", "preview_actor_chunk_size" );
-  setPreferenceProperty( chunkSize, "min",  0 );
+  setPreferenceProperty( chunkSize, "min",  1 );
   setPreferenceProperty( chunkSize, "max",  1000 );
   setPreferenceProperty( chunkSize, "step", 50 );
 
-- 
2.39.2