1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 

    17 

    18 // INCLUDE FILES

    19 #include <e32std.h>

    20 #include <bacntf.h>

    21 

    22 #include "BTGPSEnvChangeHandler.h"

    23 #include "BTGPSRequestManager.h"

    24 #include "BTGPSLogging.h"

    25 

    26 // EXTERNAL DATA STRUCTURES

    27 

    28 // EXTERNAL FUNCTION PROTOTYPES  

    29 

    30 // CONSTANTS

    31 

    32 // MACROS

    33 

    34 // LOCAL CONSTANTS AND MACROS

    35 

    36 // MODULE DATA STRUCTURES

    37 

    38 // LOCAL FUNCTION PROTOTYPES

    39 

    40 // FORWARD DECLARATIONS

    41 

    42 // ============================= LOCAL FUNCTIONS ===============================

    43 

    44 // ============================ MEMBER FUNCTIONS ===============================

    45 

    46 

    47 // -----------------------------------------------------------------------------

    48 // CBTGPSEnvChangeHandler::NewL

    49 // -----------------------------------------------------------------------------

    50 CBTGPSEnvChangeHandler* CBTGPSEnvChangeHandler::NewL(

    51         CBTGPSRequestManager& aRequestManager)

    52     {

    53     CBTGPSEnvChangeHandler* self = new (ELeave) CBTGPSEnvChangeHandler(

    54         aRequestManager);

    55     CleanupStack::PushL(self);

    56     self->ConstructL();

    57     CleanupStack::Pop();

    58     return self;

    59     }

    60 

    61 // -----------------------------------------------------------------------------

    62 // CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler

    63 // -----------------------------------------------------------------------------

    64 CBTGPSEnvChangeHandler::~CBTGPSEnvChangeHandler()

    65     {

    66     if(iEnvChangeNotifier!=NULL)

    67         {

    68         iEnvChangeNotifier->Cancel();

    69         }

    70     delete iEnvChangeNotifier;

    71     }

    72 

    73 // -----------------------------------------------------------------------------

    74 // CBTGPSEnvChangeHandler::ConstructL

    75 // -----------------------------------------------------------------------------

    76 void CBTGPSEnvChangeHandler::ConstructL()

    77     {

    78     iEnvChangeNotifier = 

    79         CEnvironmentChangeNotifier::NewL(

    80             CActive::EPriorityStandard, 

    81             TCallBack(NotifierCallBack, this));

    82     

    83     iEnvChangeNotifier->Start();

    84     }

    85 

    86 // -----------------------------------------------------------------------------

    87 // CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler

    88 // C++ default constructor can NOT contain any code, that

    89 // might leave.

    90 // -----------------------------------------------------------------------------

    91 CBTGPSEnvChangeHandler::CBTGPSEnvChangeHandler(

    92         CBTGPSRequestManager& aRequestManager) : 

    93     iRequestManager(aRequestManager)

    94     {

    95     }

    96 

    97 // -----------------------------------------------------------------------------

    98 // CBTGPSEnvChangeHandler::NotifierCallBack

    99 // -----------------------------------------------------------------------------

   100 TInt CBTGPSEnvChangeHandler::NotifierCallBack(TAny* aPtr)

   101     {

   102     reinterpret_cast<CBTGPSEnvChangeHandler*>(aPtr)->HandleEnvironmentChange();

   103     return KErrNone;

   104     }

   105 

   106 // -----------------------------------------------------------------------------

   107 // CBTGPSEnvChangeHandler:HandleEnvironmentChange

   108 // 

   109 // Currently we are only interested of system time change. This function is also

   110 // called once immediately after enviroment change notifier object is

   111 // constructed.

   112 //

   113 // NOTE: This function can be used to detect changes in phone power supply

   114 // in case this information is needed to change the functionality depending of

   115 // whether external power supply is connected or not.

   116 //

   117 // (other items were commented in a header).

   118 // -----------------------------------------------------------------------------

   119 //

   120 void CBTGPSEnvChangeHandler::HandleEnvironmentChange()

   121     {

   122     TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange start...")

   123     // This function is called once always after construction, in this

   124     // case we don't even need to check reason

   125     // --> "Filter out" this initialization

   126     if (!iEnvChangeNotifierInitialized)

   127         {

   128         iEnvChangeNotifierInitialized = ETrue;

   129         return;

   130         }

   131 

   132     // Get reason why this function was called

   133     TInt envChange = iEnvChangeNotifier->Change();

   134 

   135     // If reason was cancel, or system time change flag is not on, then we

   136     // can return.

   137      if (envChange == KErrCancel || !(envChange & EChangesSystemTime))

   138         {

   139         return;

   140         }

   141 

   142     // If system time really changed, then we set last fix time as 0

   143     iRequestManager.SystemTimeChange();

   144     TRACESTRING("CBTGPSEnvChangeHandler::HandleEnvironmentChange end")

   145     }

   146 

   147 //  End of File

   148 

   149 

   150