diff -r 4ea6f81c838a -r 0e9bb658ef58 mulwidgets/muldatamodel/inc/mulasyncdataprovider.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mulwidgets/muldatamodel/inc/mulasyncdataprovider.h	Wed Sep 01 12:23:18 2010 +0100
@@ -0,0 +1,88 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  Active Object header for providing data asynchronously
+*
+*/
+
+
+#ifndef __MULASYNCDATAPROVIDER_H__
+#define __MULASYNCDATAPROVIDER_H__
+
+#include <e32base.h>    // For CActive
+#include <mul/imulmodelprovider.h>
+#include <mul/muldatapath.h>
+#include <vector>
+
+#include "muldatawindow.h"
+#include "mulpagedatawindow.h"
+
+using namespace std;
+//Forward declarations
+
+
+namespace Alf
+	{
+//Forward declarations
+
+class MulAsyncData
+    {
+public:
+    bool operator == (const MulAsyncData& aData )
+        {
+        return ( this->mStartIndex == aData.mStartIndex && this->mRange == aData.mRange );
+        }
+public:
+    int mStartIndex;
+	int mRange;
+	MulDataPath mPath;
+    };
+
+class MulAsyncDataProvider : public CActive
+	{
+	
+public : // Constructor and Destructor
+    
+    /// need to have two-phase construction
+    /// - otherwise mixing leaves and throws
+	MulAsyncDataProvider( IMulModelProvider& aDataProvider, const MulPageDataWindow& aDataWindow );
+	
+	~MulAsyncDataProvider();
+	
+    void ProvideData( int aStartIndex, int aRange, const MulDataPath& aPath, const bool aIsSync = false );
+    
+private: 
+	
+	/**
+	 * Active call back funtion . 
+	 */
+	void RunL();
+	
+	void DoCancel();
+	
+	void ActivateAndComplete();
+	
+	int GetFirstIndexForWhichDataIsPresent(int aStartIndex, int aEndIndex);
+	  
+private: //data
+
+	IMulModelProvider&             mDataProvider;
+	vector<MulAsyncData>           mDataQueue;
+	const MulPageDataWindow&       mDataWindow;
+	}; //end of class.
+	
+	} // End of namespace .
+
+#endif  //__MULASYNCDATAPROVIDER_H__
+
+// End of file