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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: Slideshow specific timer class
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*
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*/
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// INCLUDES
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#include "shwtimer.h"
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#include <glxlog.h>
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#include <glxtracer.h>
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// LOCAL CONSTANTS
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namespace
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{
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// how many milliseconds go to microsecond
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const TInt KMultiplyMilli2Micro = 1000;
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}
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// DEPENDENCIES
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// -----------------------------------------------------------------------------
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// Constructor.
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// -----------------------------------------------------------------------------
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inline CShwTimer::CShwTimer()
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: iPaused( EFalse ) // not paused by default
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{
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}
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// -----------------------------------------------------------------------------
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// NewL.
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// -----------------------------------------------------------------------------
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CShwTimer* CShwTimer::NewL( TInt aPriority )
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{
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TRACER("CShwTimer::NewL");
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GLX_LOG_INFO( "CShwTimer::NewL" );
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CShwTimer* self = new (ELeave) CShwTimer;
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CleanupStack::PushL( self );
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self->ConstructL( aPriority );
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CleanupStack::Pop( self );
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return self;
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}
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// -----------------------------------------------------------------------------
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// ConstructL.
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// -----------------------------------------------------------------------------
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void CShwTimer::ConstructL( TInt aPriority )
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{
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TRACER("CShwTimer::ConstructL");
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GLX_LOG_INFO( "CShwTimer::ConstructL" );
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iTimer = CPeriodic::NewL( aPriority );
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}
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// -----------------------------------------------------------------------------
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// Destructor.
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// -----------------------------------------------------------------------------
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CShwTimer::~CShwTimer()
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{
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TRACER("CShwTimer::~CShwTimer()");
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GLX_LOG_INFO( "CShwTimer::~CShwTimer" );
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Cancel();
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delete iTimer;
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}
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// -----------------------------------------------------------------------------
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// Start.
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// -----------------------------------------------------------------------------
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void CShwTimer::Start( TInt aDelay, TInt aInterval, TCallBack aCallback )
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{
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TRACER("CShwTimer::Start");
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GLX_LOG_INFO( "CShwTimer::Start" );
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// convert millisecond to microseconds
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TTimeIntervalMicroSeconds32 delay = aDelay * KMultiplyMilli2Micro;
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TTimeIntervalMicroSeconds32 interval = aInterval * KMultiplyMilli2Micro;
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// remember the callback
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iCallback = aCallback;
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// remember the interval
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iInterval = interval;
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// reset the time left in case start is called during pause
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iTimeLeft = delay;
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// No harm in cancelling the timer before start
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iTimer->Cancel();
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// if not paused, start the timer
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if( !iPaused )
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{
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// Get the current time
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iTimeTimerExpires.HomeTime();
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// Add the delay to determine the expiry time
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iTimeTimerExpires += iTimeLeft;
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// Start the timer
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iTimer->Start( iTimeLeft, iInterval, iCallback );
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}
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}
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// -----------------------------------------------------------------------------
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// Cancel.
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// -----------------------------------------------------------------------------
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void CShwTimer::Cancel()
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{
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TRACER("CShwTimer::Cancel");
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GLX_LOG_INFO( "CShwTimer::Cancel" );
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if ( iTimer )
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{
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iTimer->Cancel();
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}
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}
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// -----------------------------------------------------------------------------
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// Pause
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// -----------------------------------------------------------------------------
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void CShwTimer::Pause()
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{
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TRACER("CShwTimer::Pause");
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GLX_LOG_INFO( "CShwTimer::Pause" );
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// pause only if not yet paused
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if( !iPaused )
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{
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iPaused = ETrue;
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// take time left
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iTimeLeft = TimeLeft();
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//if the iTimeTimerExpires has already elapsed then we get -ve time left.In this case make it zero
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if(iTimeLeft.Int() <= 0)
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{
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iTimeLeft = 0;
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}
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GLX_LOG_INFO1( "CShwTimer::Pause timeleft %d", iTimeLeft.Int() );
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// and cancel the timer
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iTimer->Cancel();
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}
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}
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// -----------------------------------------------------------------------------
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// Resume.
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// -----------------------------------------------------------------------------
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void CShwTimer::Resume()
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{
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TRACER("CShwTimer::Resume");
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GLX_LOG_INFO( "CShwTimer::Resume" );
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// resume only if paused
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if( iPaused )
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{
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iPaused = EFalse;
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// if we had time left
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if( 0 <= iTimeLeft.Int() )
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{
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GLX_LOG_INFO1( "CShwTimer::Resume timeleft %d", iTimeLeft.Int() );
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// start again, first for time left and after that with interval
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// NOTE: cant use Start as it takes time as milliseconds in a TInt
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// Get the current time
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iTimeTimerExpires.HomeTime();
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// Add the delay to determine the expiry time
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iTimeTimerExpires += iTimeLeft;
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// Start the timer
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iTimer->Start( iTimeLeft, iInterval, iCallback );
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}
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}
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}
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// -----------------------------------------------------------------------------
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// TimeLeft.
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// -----------------------------------------------------------------------------
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TTimeIntervalMicroSeconds32 CShwTimer::TimeLeft()
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{
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TRACER("CShwTimer::TimeLeft");
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GLX_LOG_INFO( "CShwTimer::TimeLeft" );
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TTime timeNow;
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timeNow.HomeTime();
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// Difference between time now and the time at which timer should expire
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TTimeIntervalMicroSeconds remainingTime;
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remainingTime = iTimeTimerExpires.MicroSecondsFrom( timeNow );
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TTimeIntervalMicroSeconds32 timeLeft = I64INT( remainingTime.Int64() );
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// In case that 64 bit value is larger than 32 bits, just have the
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// maximum 32 bit value
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if ( remainingTime > KMaxTInt32 )
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{
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timeLeft = TTimeIntervalMicroSeconds32( KMaxTInt32 );
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}
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return timeLeft;
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}
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// -----------------------------------------------------------------------------
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// IsActive.
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// -----------------------------------------------------------------------------
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TBool CShwTimer::IsActive()
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{
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TRACER("CShwTimer::IsActive");
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return iTimer->IsActive();
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}
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