clock/clockmw/clocktimezone/src/environmentchangenotifier.cpp
changeset 57 bb2d3e476f29
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55:2c54b51f39c4 57:bb2d3e476f29
       
     1 /*
       
     2 * Copyright (c) 2009-2010 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:
       
    15 * Definition file for the EnvironmentChangeNotifier class.
       
    16 *
       
    17 */
       
    18 
       
    19 // System includes
       
    20 #include <bacntf.h>
       
    21 
       
    22 // User includes
       
    23 #include "environmentchangenotifier.h"
       
    24 #include "timezoneclient.h"
       
    25 #include "OstTraceDefinitions.h"
       
    26 #ifdef OST_TRACE_COMPILER_IN_USE
       
    27 #include "environmentchangenotifierTraces.h"
       
    28 #endif
       
    29 
       
    30 
       
    31 /*!
       
    32 	\class EnvironmentChangeNotifier
       
    33 
       
    34 	This class listens to the enviroment changes and notifies the client.
       
    35  */
       
    36 
       
    37 /*!
       
    38 	The constructor.
       
    39  */
       
    40 EnvironmentChangeNotifier::EnvironmentChangeNotifier(TimezoneClient *client)
       
    41 {
       
    42 	OstTraceFunctionEntry0( ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCHANGENOTIFIER_ENTRY );
       
    43 	mTzClient = client;
       
    44 	
       
    45 	TCallBack callback(environmentCallback, this);
       
    46 
       
    47 	mNotifier = CEnvironmentChangeNotifier::NewL(
       
    48 			CActive::EPriorityStandard, callback);
       
    49 	mNotifier->Start();
       
    50 
       
    51 	OstTraceFunctionExit0( ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCHANGENOTIFIER_EXIT );
       
    52 }
       
    53 
       
    54 EnvironmentChangeNotifier::~EnvironmentChangeNotifier()
       
    55 {
       
    56 	OstTraceFunctionEntry0( DUP1_ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCHANGENOTIFIER_ENTRY );
       
    57 	if (mNotifier) {
       
    58 		mNotifier->Cancel();
       
    59 		delete mNotifier;
       
    60 		mNotifier = 0;
       
    61 	}
       
    62 	OstTraceFunctionExit0( DUP1_ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCHANGENOTIFIER_EXIT );
       
    63 }
       
    64 
       
    65 int EnvironmentChangeNotifier::environmentCallback(TAny* obj)
       
    66 {
       
    67 	OstTraceFunctionEntry0( ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCALLBACK_ENTRY );
       
    68 	EnvironmentChangeNotifier* self =
       
    69 			static_cast<EnvironmentChangeNotifier *> (obj);
       
    70 
       
    71 	int changes = KInitialEvent;
       
    72 	if (self->mNotifier) {
       
    73 		changes = self->mNotifier->Change();
       
    74 	}
       
    75 
       
    76 	if (KInitialEvent <= changes) {
       
    77 		// We're not concerned about handling environment changes in that range.
       
    78 		OstTraceFunctionExit0( ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCALLBACK_EXIT );
       
    79 		return 0;
       
    80 	}
       
    81 
       
    82 	if (changes & (EChangesMidnightCrossover |
       
    83 			EChangesLocale |
       
    84 			EChangesSystemTime)) {
       
    85 //		emit self->timechanged(); TODO: notify timezone client.
       
    86 //		
       
    87 		self->notifyEnvChange();
       
    88 	} else {
       
    89 		// Nothing to do.
       
    90 	}
       
    91 	OstTraceFunctionExit0( DUP1_ENVIRONMENTCHANGENOTIFIER_ENVIRONMENTCALLBACK_EXIT );
       
    92 	return 0;
       
    93 }
       
    94 
       
    95 void EnvironmentChangeNotifier::notifyEnvChange()
       
    96 {
       
    97 	OstTraceFunctionEntry0( ENVIRONMENTCHANGENOTIFIER_NOTIFYENVCHANGE_ENTRY );
       
    98 	mTzClient->notifyTimeChange();
       
    99 	OstTraceFunctionExit0( ENVIRONMENTCHANGENOTIFIER_NOTIFYENVCHANGE_EXIT );
       
   100 }
       
   101 
       
   102 // End of file -- Do not remove this.