diff -r 000000000000 -r 4e91876724a2 photosgallery/slideshow/view/src/shwslideshowbacklighttimer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/slideshow/view/src/shwslideshowbacklighttimer.cpp	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,168 @@
+/*
+* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). 
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:    Slideshow backlight timer management..
+*
+*/
+
+
+
+
+#include "shwslideshowbacklighttimer.h"
+#include <centralrepository.h>// for peripheral display timeout setting
+#include <settingsinternalcrkeys.h> // display timeout setting keys
+#include <glxlog.h>
+#include <glxtracer.h>
+#include "shwcallback.h"
+
+namespace
+	{
+	const TInt KMicroSecondsInASecond = 1000000;
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::CShwSlideshowBackLightTimer
+// C++ default constructor can NOT contain any code, that
+// might leave.
+// -----------------------------------------------------------------------------
+//
+CShwSlideshowBackLightTimer::CShwSlideshowBackLightTimer()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::NewL
+// Two-phased constructor.
+// -----------------------------------------------------------------------------
+//
+CShwSlideshowBackLightTimer* CShwSlideshowBackLightTimer::NewL()
+	{
+	TRACER("CShwSlideshowBackLightTimer::NewL");
+	GLX_LOG_INFO("CShwSlideshowBackLightTimer::NewL");
+	CShwSlideshowBackLightTimer* self = new( ELeave )
+		CShwSlideshowBackLightTimer();
+
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    CleanupStack::Pop( self );
+
+    return self;
+	}
+
+// -----------------------------------------------------------------------------
+// Destructor
+// -----------------------------------------------------------------------------
+//
+CShwSlideshowBackLightTimer::~CShwSlideshowBackLightTimer()
+    {
+    TRACER("CShwSlideshowBackLightTimer::~CShwSlideshowBackLightTimer");
+    GLX_LOG_INFO("CShwSlideshowBackLightTimer::~CShwSlideshowBackLightTimer");
+	delete iPeriodic;
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::ConstructL
+// Symbian 2nd phase constructor can leave.
+// -----------------------------------------------------------------------------
+//
+void CShwSlideshowBackLightTimer::ConstructL()
+	{
+	TRACER("CShwSlideshowBackLightTimer::ConstructL");
+	GLX_LOG_ENTRY_EXIT("CShwSlideshowBackLightTimer::ConstructL");
+	
+    CRepository* repository = CRepository::NewLC( KCRUidPeripheralSettings );
+    // What's the timeout value (in seconds ) for the display light?
+    repository->Get( KSettingsDisplayLightsTimeout, iSettingsDelay );
+    GLX_LOG_INFO1("CShwSlideshowBackLightTimer, lights timeout = %d",
+        iSettingsDelay );
+    
+    // What's the screen saver's timeout value (in seconds)?
+    TInt screenSaverTimeout = 0;
+    repository->Get( KSettingsScreenSaverPeriod, screenSaverTimeout );
+    GLX_LOG_INFO1("CShwSlideshowBackLightTimer, scr saver timeout = %d",
+        screenSaverTimeout );
+    CleanupStack::PopAndDestroy( repository );
+    
+    // Take the smaller of the two timeout values
+    iSettingsDelay = Min( iSettingsDelay, screenSaverTimeout );
+    // Convert the value to microseconds
+    iSettingsDelay *= KMicroSecondsInASecond;
+    // Halve the value to ensure out timer kicks beforehand
+    iSettingsDelay /= 2;
+    
+    // Create a timer
+    iPeriodic = CPeriodic::NewL( CPeriodic::EPriorityStandard );
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::Tick - handler code for the timer
+// -----------------------------------------------------------------------------
+//
+TInt CShwSlideshowBackLightTimer::Tick()
+    {
+	// Timer must be reset to prevent screen saver to appear in 
+	// Aalto when the slide is closed. Should not cause any side effects.
+	User::ResetInactivityTime();
+	iStartTime.HomeTime();
+
+	return 1; // continues always
+    }
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::StartL
+// -----------------------------------------------------------------------------
+//
+void CShwSlideshowBackLightTimer::StartL()
+	{
+	TRACER("CShwSlideshowBackLightTimer::StartL()");
+    GLX_LOG_INFO("CShwSlideshowBackLightTimer::StartL" );
+	iStartTime.HomeTime();
+	User::ResetInactivityTime();
+    iPeriodic->Cancel(); // in case it actually was running
+	iPeriodic->Start( iSettingsDelay, iSettingsDelay,
+	    TShwCallBack< CShwSlideshowBackLightTimer, Tick >( this ) );
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::Cancel
+// -----------------------------------------------------------------------------
+//
+void CShwSlideshowBackLightTimer::Cancel()
+	{
+	TRACER("CShwSlideshowBackLightTimer::Cancel()");
+	GLX_LOG_INFO("CShwSlideshowBackLightTimer::Cancel" );
+	User::ResetInactivityTime();
+	iPeriodic->Cancel();
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::IsRunning
+// -----------------------------------------------------------------------------
+//
+TBool CShwSlideshowBackLightTimer::IsRunning()
+	{
+	TRACER("CShwSlideshowBackLightTimer::IsRunning()");
+	GLX_LOG_INFO("CShwSlideshowBackLightTimer::IsRunning" );
+	return iPeriodic->IsActive();
+	}
+
+// -----------------------------------------------------------------------------
+// CShwSlideshowBackLightTimer::Delay
+// -----------------------------------------------------------------------------
+//
+TInt CShwSlideshowBackLightTimer::Delay()
+	{
+	TRACER("CShwSlideshowBackLightTimer::Delay()");
+	GLX_LOG_INFO("CShwSlideshowBackLightTimer::Delay" );
+	return iSettingsDelay;
+	}