From 4b12d6397f2a39475854439da49411ea6c3e4d06 Mon Sep 17 00:00:00 2001
From: adv <adv@opencascade.com>
Date: Thu, 20 Mar 2014 11:50:06 +0000
Subject: [PATCH] Transaction mechanism for operations corrected.

---
 src/HYDROGUI/HYDROGUI_Operation.cxx | 23 ++++++++++++++++++-----
 src/HYDROGUI/HYDROGUI_Operation.h   |  1 +
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/src/HYDROGUI/HYDROGUI_Operation.cxx b/src/HYDROGUI/HYDROGUI_Operation.cxx
index de64a187..761083b8 100644
--- a/src/HYDROGUI/HYDROGUI_Operation.cxx
+++ b/src/HYDROGUI/HYDROGUI_Operation.cxx
@@ -45,6 +45,7 @@ HYDROGUI_Operation::HYDROGUI_Operation( HYDROGUI_Module* theModule )
   myModule( theModule ),
   myPanel( 0 ),
   myIsPrintErrorMessage( true ),
+  myIsTransactionOpened( false ),
   myPreviewManager( 0 ),
   myPreviewZLayer( -1 )
 {
@@ -242,23 +243,35 @@ void HYDROGUI_Operation::processCancel()
 
 void HYDROGUI_Operation::startDocOperation()
 {
-  // Open transaction in the model document
+  // Open transaction in the model document only if it not
+  // already opened by other operation (intended for nested operations)
   if ( !doc()->IsOperation() )
+  {
     doc()->StartOperation();
+    myIsTransactionOpened = true;
+  }
 }
 
 void HYDROGUI_Operation::abortDocOperation()
 {
-  // Abort transaction in the model document
-  if ( doc()->IsOperation() )
+  // Abort transaction in the model document only if it was 
+  // opened by this operation (intended for nested operations)
+  if ( myIsTransactionOpened && doc()->IsOperation() )
+  {
     doc()->AbortOperation();
+    myIsTransactionOpened = false;
+  }
 }
 
 void HYDROGUI_Operation::commitDocOperation()
 {
-  // Commit transaction in the model document
-  if ( doc()->IsOperation() )
+  // Commit transaction in the model document only if it was 
+  // opened by this operation (intended for nested operations)
+  if ( myIsTransactionOpened && doc()->IsOperation() )
+  {
     doc()->CommitOperation( HYDROGUI_Tool::ToExtString( getName() ) );
+    myIsTransactionOpened = false;
+  }
 }
 
 Handle_HYDROData_Document HYDROGUI_Operation::doc() const
diff --git a/src/HYDROGUI/HYDROGUI_Operation.h b/src/HYDROGUI/HYDROGUI_Operation.h
index be5f8e7f..05879abf 100644
--- a/src/HYDROGUI/HYDROGUI_Operation.h
+++ b/src/HYDROGUI/HYDROGUI_Operation.h
@@ -109,6 +109,7 @@ private:
   OCCViewer_ViewManager*              myPreviewManager;
   QString                             myName;
   bool                                myIsPrintErrorMessage;
+  bool                                myIsTransactionOpened;
   int                                 myPreviewZLayer;
 };
 
-- 
2.39.2