--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vtuis/videotelui/inc/cvtuidtmfbuffer.h	Mon Nov 23 14:47:47 2009 +0200
@@ -0,0 +1,138 @@
+/*
+* Copyright (c) 2007 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:  DTMF buffer definition.
+*
+*/
+
+
+#ifndef C_VTUIDTMFBUFFER_H
+#define C_VTUIDTMFBUFFER_H
+
+#include <e32base.h>
+#include "mvtuinumbersource.h"
+
+class CCoeEnv;
+class TKeyEvent;
+
+// Maximum size of the DTMF buffer
+const TInt KVtUiDTMFBufferSize = 64;
+
+/**
+*  TVtUiBaseComponentState
+*
+*  Base componentstate definition.
+*
+*  @since S60 v5.0
+*/
+class CVtUiDTMFBuffer : public CActive, public MVtUiNumberSource
+    {
+
+public:
+
+    /**
+    * Static construction method.
+    * @param aCoeEnv Reference to CoeEnv object.
+    * @return Pointer to newly created instance of CVtUiDTMFBuffer.
+    */
+    static CVtUiDTMFBuffer* NewL( const CCoeEnv& aCoeEnv );
+
+    /**
+    * C++ destructor.
+    */
+    ~CVtUiDTMFBuffer();
+
+    /**
+    * Append one character to DTMF buffer.
+    * @param aChar Character to append.
+    * @return ETrue if the given character was appended (i.e. it is a DTMF)
+    */
+    TBool Append( TChar aChar );
+
+    /**
+    * Clears the contents of the DTMF buffer.
+    */
+    void Reset();
+
+    /**
+    * Promote this instance as current number source.
+    */
+    void Activate();
+
+    /**
+    * Demote this instance from current number source position.
+    */
+    void Deactivate();
+
+public: // from MVtUiNumberSource
+
+    /**
+    * @see MVtUiNumberSource::GetContents
+    */
+    void GetContents( TDes& aContents ) const;
+
+private: // from CActive
+
+    /**
+    * @see CActive::DoCancel
+    */
+    void DoCancel();
+
+    /**
+    * @see CActive::RunL
+    */
+    void RunL();
+
+private:
+
+    /**
+    * C++ constructor
+    */
+    CVtUiDTMFBuffer( const CCoeEnv& aCoeEnv );
+
+    /**
+    * 2nd constructor, may leave.
+    */
+    void ConstructL();
+
+    /**
+    * Starts buffer modification monitoring timer. If this timer expires,
+    * buffer will be reset. Timer is restarted when new character is added to
+    * the buffer.
+    */
+    void StartTimer();
+
+    /**
+    * Called when buffer modification monitoring timer has expired.
+    */
+    void TimerExpired( TInt aError );
+
+    /**
+    * Clears the contents of the DTMF buffer.
+    */
+    void ResetBuffer();
+
+private:
+
+    // Reference to coeenv
+    const CCoeEnv& iCoeEnv;
+
+    // Timer instance
+    RTimer iTimer;
+
+    // DTMF buffer
+    TBuf< KVtUiDTMFBufferSize > iBuffer;
+
+    };
+
+#endif // C_VTUIDTMFBUFFER_H