--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vtengines/videoteleng/Inc/State/CVtEngStateBase.h	Mon Nov 23 14:47:47 2009 +0200
@@ -0,0 +1,190 @@
+/*
+* Copyright (c) 2006 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:  Base class for states
+*
+*/
+
+
+
+#ifndef CVTENGSTATEBASE_H
+#define CVTENGSTATEBASE_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "vtengcommands.h"
+#include "CVtEngStateManager.h"
+#include "CVtEngEventManager.h"
+#include "CVtEngMediaHandler.h"
+#include "CVtEngSessionHandler.h"
+#include "CVtEngOperation.h"
+#include "CVtEngSettings.h"
+#include "VtEngUtils.h"
+
+// FORWARD DECLARATIONS
+class CVtEngSessionHandler;
+class CVtEngMediaHandler;
+class CVtEngAudioHandler;
+
+// CLASS DECLARATION
+
+/**
+*  State base class
+
+*  @lib videoteleng
+*  @since 2.6
+*/
+NONSHARABLE_CLASS( CVtEngStateBase ) : public CBase
+    {
+    public:  // Constructors and destructor
+        
+        /**
+        * Destructor.
+        */
+        virtual ~CVtEngStateBase();
+
+    public: // New functions
+        
+        /**
+        * Updates state. May result to state transition
+        */
+        virtual void UpdateL() = 0;
+
+        /**
+        * Checks if a command is valid in current state.
+        * @param aCommandId command to be validated
+        * @return ETrue if command is valid.
+        */
+        virtual TBool ValidateCommand(
+            const TVtEngCommandId aCommandId );
+
+        /**
+        * Handles an operation. Base class method is empty
+        * and derived classes may handle the operation if applicable.
+        * @param aOp operation to be handled
+        * @return ETrue if handled
+        */
+        virtual TBool HandleL( CVtEngOperation& aOp );
+
+        /**
+        * Returns session handler.
+        * @return reference to session handler
+        */
+        CVtEngSessionHandler& SessionHandler();
+
+        /**
+        * Returns media handler.
+        * @return reference to media handler
+        */
+        CVtEngMediaHandler& MediaHandler();
+
+        /**
+        * Returns audio handler.
+        * @return reference to audio handler
+        */
+        CVtEngAudioHandler& AudioHandler();
+
+        /**
+        * Creates new state if needed.
+        * @return new state or NULL
+        */
+        CVtEngStateBase* NewStateL( 
+            const MVtEngSessionInfo::TSessionState aState );
+
+        virtual MVtEngSessionInfo::TSessionState State() const = 0;
+
+    public: // New functions 
+
+        /**
+        * Sets new current state. 
+        * @param aOldState old state.
+        */
+        void OpenL( CVtEngStateBase* aOldState );
+
+        /**
+        * For derived classes to handle state change
+        */
+        virtual void DoOpenL( ) = 0;
+
+        
+        /**
+        * State uninitialization.
+        */
+        virtual void Close();
+
+    protected: // new functions
+
+        /**
+        * Saves configuration to settings for later
+        * usage.
+        */
+        void SaveToSettingsL( CVtEngOperation& aOp );
+
+        /**
+        * Notifies state change to event manager.
+        * @param aNewState new session state.
+        */
+        void NotifyStateChange( MVtEngSessionInfo::TSessionState aNewState );
+
+        /**
+        * Saves video state to settings. Used e.g. when video can not be 
+        * started in current state.
+        * @param aEnabled video is enabled
+        */
+        void SetVideoEnabled( TBool aEnabled );
+
+        /**
+        * Goes to disconnecting or idle state if needed.
+        * @return state object if transition is required.
+        */
+        //CVtEngStateBase* DisconnectingOrIdleStateL();
+
+        /**
+        * Creates negotiating state if bearer state is connected
+        * and pv state is ESetup, and UI has indicated state changte
+        * is permitted.
+        * @return negotiating state object or NULL
+        */
+        CVtEngStateBase* NegotiatingOrConnectedStateL( 
+            TBool aAcceptOnlyNegotiating = EFalse );
+
+
+        /**
+        * Saves video state to settings. Used e.g. when video can not be 
+        * started in current state.
+        * @param aEnabled video is enabled
+        */
+        void TerminateSessionL( CVtEngOperation& aOp );
+
+    protected:
+
+        /**
+        * C++ constructor.
+        */
+        CVtEngStateBase( 
+            CVtEngStateManager& aStateManager,
+            CVtEngEventManager& aEventManager );
+
+    protected:  // Data
+        // State manager
+        CVtEngStateManager& iStateManager;
+
+        // Event manager
+        CVtEngEventManager& iEventManager;
+
+    private:
+    };
+
+#endif      // CVTENGSTATEBASE_H
+
+// End of File