vtengines/videoteleng/CallCtrl/Inc/CVtCtlCallStatusMonitor.h
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     1 /*
       
     2 * Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies).
       
     3 * All rights reserved.
       
     4 * This component and the accompanying materials are made available
       
     5 * under the terms of "Eclipse Public License v1.0"
       
     6 * which accompanies this distribution, and is available
       
     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     8 *
       
     9 * Initial Contributors:
       
    10 * Nokia Corporation - initial contribution.
       
    11 *
       
    12 * Contributors:
       
    13 *
       
    14 * Description:  Monitors call status.
       
    15 *
       
    16 */
       
    17 
       
    18 
       
    19 
       
    20 #ifndef CVTCTLCALLSTATUSMONITOR_H
       
    21 #define CVTCTLCALLSTATUSMONITOR_H
       
    22 
       
    23 //  INCLUDES
       
    24 
       
    25 #include "MVtCtlCallControl.h"
       
    26 #include <e32base.h>
       
    27 #include <etelmm.h>
       
    28 
       
    29 /**
       
    30 * Array for resolving call status (TMobileCallStatus) transition validity.
       
    31 * Transition to lower value is not possible with exception to 0 priority
       
    32 * (always possible to go to idle state). Initial state is EStatusUnknown.
       
    33 */
       
    34 static const TInt KVtCtlStatusTransitionPriorities[] =
       
    35     { 
       
    36       1, //    EStatusUnknown
       
    37       0, //    EStatusIdle, possible from any
       
    38       2, //    EStatusDialling
       
    39       2, //    EStatusRinging
       
    40       3, //    EStatusAnswering
       
    41       3, //    EStatusConnecting
       
    42       4, //    EStatusConnected
       
    43       5, //    EStatusDisconnecting          
       
    44       // Status values below are not valid in video calls => should not happen.
       
    45       5, //    EStatusDisconnectingWithInband      
       
    46       0, //    EStatusReconnectPending
       
    47       0, //    EStatusHold
       
    48       0, //    EStatusWaitingAlternatingCallSwitch
       
    49       0, //    EStatusTransferring
       
    50       0  //    EStatusTransferAlerting
       
    51     };
       
    52 
       
    53 // FORWARD DECLARATIONS
       
    54 class MVtCtlCallStatusObserver;
       
    55 
       
    56 // CLASS DECLARATION
       
    57 
       
    58 /**
       
    59 *  Monitor for call status
       
    60 *
       
    61 *  @lib CSCallCtrl
       
    62 *  @since 2.6
       
    63 */
       
    64 NONSHARABLE_CLASS( CVtCtlCallStatusMonitor ) : public CActive
       
    65     {
       
    66     public:  // Constructors and destructor
       
    67 
       
    68         /**
       
    69         * C++ constructor.
       
    70         * @param aCall call subsession
       
    71         * @param aObserver call status observer
       
    72         */
       
    73         /*****************************************************
       
    74         *   Series 60 Customer / ETel
       
    75         *   Series 60  ETel API
       
    76         *****************************************************/
       
    77         CVtCtlCallStatusMonitor( 
       
    78             RMobileCall& aCall,
       
    79             MVtCtlCallStatusObserver& aObserver );
       
    80 
       
    81         /**
       
    82         * Destructor.
       
    83         */
       
    84         virtual ~CVtCtlCallStatusMonitor();
       
    85 
       
    86     public: // New functions
       
    87         
       
    88         /**
       
    89         * Starts monitoring
       
    90         */
       
    91         void Start();
       
    92 
       
    93     private:  // From CActive
       
    94 
       
    95         /**
       
    96         * Cancel monitoring.
       
    97         */
       
    98         virtual void DoCancel();
       
    99 
       
   100         /**
       
   101         * Handles call status change.
       
   102         */
       
   103         virtual void RunL();
       
   104 
       
   105         /**
       
   106         * Handles leave in RunL.
       
   107         * @param aError error code
       
   108         * @return KErrNone
       
   109         */
       
   110         virtual TInt RunError( TInt aError );
       
   111 
       
   112     public: // New functions
       
   113         
       
   114         /**
       
   115         * Maps Etel status to internal state
       
   116         * @param aStatus mobile call status
       
   117         * @return session state, see TVtCtlState
       
   118         */
       
   119         /*****************************************************
       
   120         *   Series 60 Customer / ETel
       
   121         *   Series 60  ETel API
       
   122         *****************************************************/
       
   123         static MVtCtlCallControl::TVtCtlState MapState(
       
   124             const RMobileCall::TMobileCallStatus aStatus );
       
   125                 
       
   126         /**
       
   127         * Checks if call state transition specified by arguments is legal.
       
   128         * @param aNewState proposed new call state
       
   129         * @param aCurrentState current call state
       
   130         * @return ETrue if transition is valid
       
   131         */
       
   132         static TBool IsLegalNewState(
       
   133             const RMobileCall::TMobileCallStatus aNewState,
       
   134             const RMobileCall::TMobileCallStatus aCurrentState );
       
   135                 
       
   136     private:    // Data
       
   137 
       
   138         // Data call
       
   139         /*****************************************************
       
   140         *   Series 60 Customer / ETel
       
   141         *   Series 60  ETel API
       
   142         *****************************************************/
       
   143         RMobileCall& iCall;
       
   144         
       
   145         // Observer for call status changes
       
   146         MVtCtlCallStatusObserver& iObserver;
       
   147 
       
   148         // Call status and previous status
       
   149         /*****************************************************
       
   150         *   Series 60 Customer / ETel
       
   151         *   Series 60  ETel API
       
   152         *****************************************************/
       
   153         RMobileCall::TMobileCallStatus iCallStatus;
       
   154         RMobileCall::TMobileCallStatus iPreviousStatus;
       
   155     };
       
   156 
       
   157 #endif      // CVTCTLCALLSTATUSMONITOR_H
       
   158 
       
   159 // End of File