examples/Base/MessageQueueExample/src/CMsgQActive.cpp

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00001 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
00002 // All rights reserved.
00003 // This component and the accompanying materials are made available
00004 // under the terms of "Eclipse Public License v1.0"
00005 // which accompanies this distribution, and is available
00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
00007 //
00008 // Initial Contributors:
00009 // Nokia Corporation - initial contribution.
00010 //
00011 // Contributors:
00012 //
00013 // Description:
00014 // The following class opens the InverterOutQ message Queue and displays 
00015 // recieved data in console.
00016 //
00017 
00018 
00019 
00025 #include "CMsgQActive.h"
00026 #include "e32cons.h"
00027 
00028 _LIT(KCommonFormat2,"%S");
00029 _LIT(KTitle , "OutputMessage");
00030 
00034 CMsgQActive::CMsgQActive(TInt aPriority):CActive(aPriority)
00035         {
00036         CActiveScheduler::Add( this );
00037         }
00038 
00039 
00040 CMsgQActive* CMsgQActive::NewL(TInt aPriority)
00041         {
00042         CMsgQActive* self=new(ELeave)CMsgQActive(aPriority);
00043         CleanupStack::PushL(self);
00044         self->ConstructL();
00045         CleanupStack::Pop(self);
00046         return self;
00047         }
00048 
00052 void CMsgQActive::ConstructL()
00053         {
00054         iConsole = Console::NewL(KTitle, TSize(KConsFullScreen, KConsFullScreen));
00055         _LIT(KWelcomeScreen,".......Words recieved from the inverter......\n");
00056         iConsole->Printf(KWelcomeScreen);
00057         
00058         //Open the InverterOutQ Message Queue.
00059         _LIT(KGlobalInverterOutQ, "InverterOutQ");
00060         User::LeaveIfError(iInverterOutQ.OpenGlobal(KGlobalInverterOutQ));              
00061         }
00062 
00067 void CMsgQActive::StartRecieving()
00068         {
00069         iInverterOutQ.NotifyDataAvailable(iStatus);
00070         SetActive();
00071         }
00072 
00073 CMsgQActive::~CMsgQActive()
00074         {
00075         }
00076 
00080 void CMsgQActive::DoCancel()
00081         {
00082         //Cancel any data which is present in the message Queue.
00083         iInverterOutQ.CancelDataAvailable();
00084         delete iConsole;
00085         }
00086 
00091 void CMsgQActive::RunL()
00092         {
00093         // Recieve all available messages from the message queue.
00094         iInverterOutQ.ReceiveBlocking(imsgQData);       
00095         
00096         //Print the recieved message in the output message console.
00097         iConsole->Printf(KCommonFormat2,&imsgQData);
00098         
00099         _LIT(KNextLine , "\n");
00100         iConsole->Printf(KNextLine);
00101         
00102         // Make asynchronous request to be notified when data is available
00103         iInverterOutQ.NotifyDataAvailable(iStatus);
00104         SetActive();
00105         }
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Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License v1.0.