TB10.1 Example Applications: examples/Base/ArraysAndLists/linkedlist/deltaque/src/deltaque.cpp Source File

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 // Contains the E32Main() function, which executes the example.
-00015 // The example demonstrates the use of the TDeltaQue class, which represents
-00016 // a delta queue.
-00017 // An object of the CPeriodic class generates periodic timer events.
-00018 // Either the tick count is added to the delta queue or
-00019 // elements are removed from the list, depending on the state of the queue.
-00020 // The user can stop the generation of timer events by pressing a key.
-00021 //
-00022 
-00023 
-00024 
-00029 #include "userinterface.h"
-00030 
-00031 LOCAL_D CConsoleBase* console;
-00032 
-00033 LOCAL_C void DoStartL();
-00034 LOCAL_C void CallExampleL();
-00035 
-00036 LOCAL_C void DoStartL()
-00037         {
-00038         // Create and install the active scheduler.
-00039         CActiveScheduler* scheduler = new (ELeave) CActiveScheduler();
-00040         CleanupStack::PushL(scheduler);
-00041         CActiveScheduler::Install(scheduler);
-00042 
-00043         _LIT(KTextExample, "Delta Queue Example\nCreating and starting timer object\n");
-00044         console->Printf(KTextExample);
-00045         
-00046         // Create an object of the CTimerEntry class.
-00047         CTimerEntry* entry = CTimerEntry::NewL(console);
-00048         CleanupStack::PushL(entry);
-00049 
-00050         // Create an object of the CUserInterface class.
-00051         CUserInterface* interface = CUserInterface::NewL(console,entry);
-00052         CleanupStack::PushL(interface);
-00053 
-00054         // Wait for a key press from the user.
-00055         // Generate an asynchronous read request.
-00056         interface->ReadFunc();
-00057 
-00058         // Start the active scheduler.
-00059         CActiveScheduler::Start();
-00060 
-00061         // Destroy the objects in the cleanup stack.
-00062         CleanupStack::PopAndDestroy(3,scheduler); // interface, entry, scheduler.
-00063         }
-00064 
-00065 GLDEF_C TInt E32Main() // main function called by E32
-00066     {
-00067         __UHEAP_MARK;
-00068         CTrapCleanup* cleanup=CTrapCleanup::New(); // get clean-up stack
-00069         TRAPD(error, CallExampleL()); // more initialization, then do example
-00070         delete cleanup; // destroy clean-up stack
-00071         __ASSERT_ALWAYS(!error, User::Panic(KTxtEPOC32EX, error));
-00072         __UHEAP_MARKEND;
-00073         return 0; // and return
-00074     }
-00075 
-00076 LOCAL_C void CallExampleL() // initialize and call example code under cleanup stack
-00077     {
-00078         console=Console::NewL(KTxtExampleCode, TSize(KConsFullScreen, KConsFullScreen));
-00079         CleanupStack::PushL(console);
-00080         TRAPD(error, DoStartL()); // perform example function
-00081         if (error)
-00082                 console->Printf(KFormatFailed, error);
-00083         else
-00084                 console->Printf(KTxtOK);
-00085         console->Printf(KTextPressAnyKey);
-00086         console->Getch(); // get and ignore character
-00087         CleanupStack::PopAndDestroy(); // close console
-00088     }
-