--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/skins/AknSkins/alsrc/AknsAlTimingModelRelative.cpp	Thu Dec 17 09:14:12 2009 +0200
@@ -0,0 +1,242 @@
+/*
+* Copyright (c) 2004-2008 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:  Implements relative timing model.
+*
+*/
+
+
+// INCLUDE FILES
+#include <e32base.h>
+#include <e32math.h>
+#include <AknsRlParameter.h>
+#include "AknsAlTimingModelRelative.h"
+
+// ============================ MEMBER FUNCTIONS ===============================
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::CAknsAlTimingModelRelative
+// -----------------------------------------------------------------------------
+//
+CAknsAlTimingModelRelative::CAknsAlTimingModelRelative():
+    iTimeSpan( EHour ),
+    iSlices( 1 ),
+    iWrap( EFalse ),
+    iRelative( 0 )
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::NewL
+// -----------------------------------------------------------------------------
+//
+CAknsAlTimingModelRelative* CAknsAlTimingModelRelative::NewL()
+    {
+    CAknsAlTimingModelRelative* self = new(ELeave) CAknsAlTimingModelRelative();
+    return self;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::CAknsAlTimingModelRelative
+// -----------------------------------------------------------------------------
+//
+CAknsAlTimingModelRelative::~CAknsAlTimingModelRelative()
+    {
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::SetParametersL
+// -----------------------------------------------------------------------------
+//
+void CAknsAlTimingModelRelative::SetParametersL(
+    MAknsRlParameterIterator& aParameters )
+    {
+    // Iterate over available parameters
+    while( aParameters.HasNext() )
+        {
+        const TAknsRlParameterData* param = aParameters.NextL();
+
+        if( param->iName->Compare( KAknsAlRelativeTimeSpan ) == 0 )
+            {
+            if( param->iType != EAknsRlParameterTypeNumber )
+                User::Leave( KErrArgument );
+
+            if( param->iNumber < EHour || param->iNumber > EMonth )
+                User::Leave( KErrArgument );
+
+            iTimeSpan = TTimeSpan( param->iNumber );
+            }
+        else if( param->iName->Compare( KAknsAlRelativeSlices ) == 0 )
+            {
+            if( param->iType != EAknsRlParameterTypeNumber )
+                User::Leave( KErrArgument );
+
+            if( param->iNumber < 1 )
+                User::Leave( KErrArgument );
+
+            iSlices = param->iNumber;
+            }
+        else if( param->iName->Compare( KAknsAlRelativeWrap ) == 0 )
+            {
+            if( param->iType != EAknsRlParameterTypeNumber )
+                User::Leave( KErrArgument );
+
+            iWrap = ( param->iNumber != 0 ) ? ETrue: EFalse;
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::Tick
+// -----------------------------------------------------------------------------
+//
+void CAknsAlTimingModelRelative::Tick( const TInt /*aDeltaTime*/ )
+    {
+    TTime current;
+    current.HomeTime();
+    Tick( current );
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::Tick
+// -----------------------------------------------------------------------------
+//
+void CAknsAlTimingModelRelative::Tick( const TTime& aStamp )
+    {
+    // TODO Is 16.16 enough for lengthy time spans?
+    // In a month time span 16.16 leads to about 40 second resolution
+    TDateTime cur = aStamp.DateTime();
+    TTime startStamp;
+    TTime endStamp;
+
+    switch( iTimeSpan )
+        {
+        case EHour:
+            {
+            startStamp = TDateTime( cur.Year(), cur.Month(), cur.Day(), cur.Hour(), 0, 0, 0 );
+            endStamp = startStamp + TTimeIntervalHours( 1 );
+            }
+            break;
+        case EDay:
+            {
+            startStamp = TDateTime( cur.Year(), cur.Month(), cur.Day(), 0, 0, 0, 0 );
+            endStamp = startStamp + TTimeIntervalDays( 1 );
+            }
+            break;
+        case EWeek:
+            {
+            startStamp = TDateTime( cur.Year(), cur.Month(), cur.Day(), 0, 0, 0, 0 );
+            // Reverse to the start of the week
+            startStamp = startStamp - TTimeIntervalDays( aStamp.DayNoInWeek() );
+            endStamp = startStamp + TTimeIntervalDays( 7 );
+            }
+            break;
+        case EMonth:
+            {
+            startStamp = TDateTime( cur.Year(), cur.Month(), 0, 0, 0, 0, 0 );
+            endStamp = startStamp + TTimeIntervalDays( aStamp.DaysInMonth() );
+            }
+            break;
+        default:
+            iRelative = 0;
+            return;
+        }
+
+    // Determine second spans ( start -> end, start -> cur )
+    TTimeIntervalSeconds intervalToCur = 0;
+    TTimeIntervalSeconds intervalToEnd = 0;
+
+    TInt err = startStamp.SecondsFrom( aStamp, intervalToCur );
+    if( KErrNone != err ) // Theoretical, 32bit integer was overflown
+        {
+        iRelative = KAlMaxRelative;
+        return;
+        }
+
+    err = startStamp.SecondsFrom( endStamp, intervalToEnd );
+    if( KErrNone != err ) // Theoretical, 32bit integer was overflown
+        {
+        iRelative = KAlMaxRelative;
+        return;
+        }
+
+    // Floating point calculations used intentionally (relative timing model is
+    // called rarely).
+    TReal secsToCur = TReal( intervalToCur.Int() );
+    TReal secsToEnd = TReal( intervalToEnd.Int() );
+    if( secsToEnd == 0 )
+        secsToEnd = 1;
+    TReal posOnSlices = ( secsToCur / secsToEnd ) * TReal( iSlices ); //lint !e414 secsToEnd != 0
+
+    TInt32 sliceNo;
+    TReal relative;
+
+    // Current slice is the integer part of posOnSlices
+    err = Math::Int( sliceNo, posOnSlices );
+    if( KErrNone != err )
+        {
+        iRelative = 0;
+        return;
+        }
+
+    // Relative value is the posOnSlices fractional
+    err = Math::Frac( relative, posOnSlices );
+    if( KErrNone != err )
+        {
+        iRelative = 0;
+        return;
+        }
+
+    // Reverse every second slice. Wrapping has effect only when there are
+    // more than one slices.
+    if( iWrap && ( sliceNo % 2 ) == 1 )
+        {
+        relative = 1.0 - relative;
+        }
+
+    // Convert to fixed point, relative is always in range [0.0, 1.0]
+    iRelative = TInt( ( TReal(KAlMaxRelative) * relative ) + 0.5 );
+    }//lint !e414 secsToEnd != 0 (for some reason lint nags about the whole method)
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::RelativeValue
+// -----------------------------------------------------------------------------
+//
+TUint32 CAknsAlTimingModelRelative::RelativeValue() const
+    {
+    return iRelative;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::IsFinished
+// -----------------------------------------------------------------------------
+//
+TBool CAknsAlTimingModelRelative::IsFinished() const
+    {
+    // Relative timing model is always infinite
+    return EFalse;
+    }
+
+// -----------------------------------------------------------------------------
+// CAknsAlTimingModelRelative::Begin
+// -----------------------------------------------------------------------------
+//
+void CAknsAlTimingModelRelative::Begin()
+    {
+    // Time span type defines the starting point of a time span. System time or
+    // time stamp defines the current poisition in time span -> begin is
+    // irrelevant
+    }
+
+// End of file
+