--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uifw/AvKon/aknphysics/src/aknphysicsflicktracker.cpp	Tue Feb 02 01:00:49 2010 +0200
@@ -0,0 +1,310 @@
+/*
+* Copyright (c) 2009 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:  AknPhysics flick tracker
+*
+*/
+
+#include <e32debug.h>
+
+#include "aknphysicsconstants.h"
+#include "aknphysicsflicktracker.h"
+#include "aknphysicsparameterprovider.h"
+
+const TInt KDistanceFactor( 1000000 );
+const TInt KSpeedUpIncrease( 500 );
+const TInt KIgnoreSpeedUpEvents( 3 );
+
+// ======== MEMBER FUNCTIONS ========
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::NewL
+// ---------------------------------------------------------------------------
+//
+CAknPhysicsFlickTracker* CAknPhysicsFlickTracker::NewL(
+        CAknPhysicsParameterProvider* aProvider )
+    {
+    CAknPhysicsFlickTracker* self = 
+        CAknPhysicsFlickTracker::NewLC( aProvider );
+    CleanupStack::Pop( self );
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::NewLC
+// ---------------------------------------------------------------------------
+//
+CAknPhysicsFlickTracker* CAknPhysicsFlickTracker::NewLC(
+        CAknPhysicsParameterProvider* aProvider )
+    {
+    CAknPhysicsFlickTracker* self 
+        = new ( ELeave ) CAknPhysicsFlickTracker( aProvider );
+    CleanupStack::PushL( self );
+    self->ConstructL();
+    return self;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::~CAknPhysicsDragObserver
+// ---------------------------------------------------------------------------
+//
+CAknPhysicsFlickTracker::~CAknPhysicsFlickTracker()
+    {
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::InitTracker
+// ---------------------------------------------------------------------------
+//
+void CAknPhysicsFlickTracker::InitTracker( const TInt& aCoordinate )
+    {
+    iDirection = EDirectionNone;
+    iCoordinate = aCoordinate;
+    InitFlickData( iDirectionData, aCoordinate );
+    InitFlickData( iNormalStartData, aCoordinate );
+    InitFlickData( iSpeedUpData, aCoordinate );
+    InitFlickData( iSpeedUpStartData, aCoordinate );
+    iLastDragTime.HomeTime();
+    iChangeRegistered = EFalse;
+    iSpeedUpRegistered = EFalse;
+    iLastDragSpeed = 0;
+    iIgnoredEvents = 0;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::DragChanged
+// ---------------------------------------------------------------------------
+//
+void CAknPhysicsFlickTracker::DragChanged( const TInt& aCoordinate )
+    {
+    TBool changed( EFalse );
+    TBool registered( EFalse );
+
+    // First check if drag direction has changed
+    TDirection direction( EDirectionNone );
+    if ( aCoordinate > iCoordinate 
+        && iDirection != EDirectionForward )
+        {
+        direction = EDirectionForward;
+        }
+    else if ( aCoordinate < iCoordinate 
+        && iDirection != EDirectionBackward )
+        {
+        direction = EDirectionBackward;
+        }
+
+    if ( direction != EDirectionNone )
+        {
+        // Direction change only after first direction is saved
+        if ( iDirection != EDirectionNone )
+            {
+            iDirectionData.iCoordinate = aCoordinate;
+            iDirectionData.iTime.HomeTime();
+            iChangeRegistered = EFalse;
+            changed = ETrue;
+            }
+        iDirection = direction;
+        }
+
+    if ( !iChangeRegistered && iDirectionData.iCoordinate != iNormalStartData.iCoordinate )
+        {
+        TInt distance( iDirectionData.iCoordinate - aCoordinate );
+        // Distance from direction change position has exceeded threshold
+        // - save the direction changed position as new start position
+        if ( Threshold() && Abs( distance ) > Threshold() )
+            {
+            iNormalStartData = iDirectionData;
+            iChangeRegistered = ETrue;
+            registered = ETrue;
+            }
+        }
+
+    // No speed changes are registered when direction has changed
+    if ( !changed && !registered )
+        {
+        SpeedChanged( aCoordinate );    	
+        }
+    // If direction was changed - reset speed change data
+    else if ( registered )
+        {
+        iSpeedUpData = iNormalStartData;
+        iSpeedUpStartData = iNormalStartData;
+        iSpeedUpRegistered = EFalse;
+        iIgnoredEvents = 0;
+        iLastDragSpeed = 0;
+        }
+    
+    iCoordinate = aCoordinate;
+    iLastDragTime.HomeTime();
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::FlickStartCoordinate
+// ---------------------------------------------------------------------------
+//
+TInt CAknPhysicsFlickTracker::FlickStartCoordinate() const
+    {
+    // If move time from flick start point has exceeded flick maximum duration,
+    // check if speed has increased and use speed-up position parameters
+    if ( NormalFlickMoveTime() > KFlickMaxDuration )
+        {
+        return iSpeedUpStartData.iCoordinate;
+        }
+    return iNormalStartData.iCoordinate;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::FlickMoveTime
+// ---------------------------------------------------------------------------
+//
+TInt CAknPhysicsFlickTracker::FlickMoveTime() const
+    {
+    // If move time from flick start point has exceeded flick maximum duration,
+    // check if speed has increased and use speed-up position parameters
+    if ( NormalFlickMoveTime() > KFlickMaxDuration )
+        {
+        TTime now;
+        now.HomeTime();
+        return now.MicroSecondsFrom( iSpeedUpStartData.iTime ).Int64();
+        }
+    return NormalFlickMoveTime();
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::CAknPhysicsFlickTracker
+// ---------------------------------------------------------------------------
+//
+CAknPhysicsFlickTracker::CAknPhysicsFlickTracker( 
+        CAknPhysicsParameterProvider* aProvider )
+    :
+    iDirection( EDirectionNone ),
+    iProvider( aProvider )
+    {
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::ConstructL
+// ---------------------------------------------------------------------------
+//
+void CAknPhysicsFlickTracker::ConstructL()
+    {
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::SpeedChanged
+// ---------------------------------------------------------------------------
+//
+void CAknPhysicsFlickTracker::SpeedChanged( const TInt& aCoordinate )
+    {
+    TInt newSpeed( DragSpeed( aCoordinate ) );
+
+    // iIgnoreEvents keeps track of such events which speedup positions should
+    // be ignored. This is done to calculate speed-up parameters from the first
+    // successive speed-up positions
+    if ( iIgnoredEvents > 0 )
+        {
+        iIgnoredEvents--;
+        }
+
+    // New speed exceeds the speed threshold - save speed up data
+    if ( iIgnoredEvents == 0 
+        && iLastDragSpeed && ( newSpeed - iLastDragSpeed > KSpeedUpIncrease )
+        && ( ( iDirection == EDirectionForward && aCoordinate > iCoordinate )
+        ||  ( iDirection == EDirectionBackward && aCoordinate < iCoordinate ) ) )
+        {
+        iSpeedUpData.iCoordinate = iCoordinate;
+        iSpeedUpData.iTime = iLastDragTime;
+        iSpeedUpRegistered = EFalse;
+        iIgnoredEvents = KIgnoreSpeedUpEvents;
+        iSpeedUpStartData = iNormalStartData;
+        }
+
+    // Speed-up hasn't yet been registered - save speed up start data if the
+    // drag distance exceeds threshold
+    if  ( !iSpeedUpRegistered  && iSpeedUpData.iCoordinate != iSpeedUpStartData.iCoordinate )
+        {
+        TInt distance( iSpeedUpData.iCoordinate - aCoordinate );
+        // Distance from direction change position has exceeded threshold
+        // - save the direction changed position as new start position
+        if ( Threshold() && Abs( distance ) > Threshold() )
+            {
+            iSpeedUpStartData = iSpeedUpData;
+            iSpeedUpRegistered = ETrue;
+            }
+        }
+    iLastDragSpeed = newSpeed;
+    }
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::Threshold
+// ---------------------------------------------------------------------------
+//
+TInt CAknPhysicsFlickTracker::Threshold()
+    {
+    if ( iProvider )
+        {
+        return iProvider->DragThreshold();
+        }
+    return 0;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::DragSpeed
+// ---------------------------------------------------------------------------
+//
+TInt CAknPhysicsFlickTracker::DragSpeed( const TInt& aNewCoordinate )
+    {
+    TTime now;
+    now.HomeTime();
+    TInt moveTime( now.MicroSecondsFrom( iLastDragTime ).Int64() );
+    TInt distance( Abs( iCoordinate - aNewCoordinate ) * KDistanceFactor );
+    if ( moveTime )
+        {
+        return ( distance / moveTime ); 
+        }
+    return 0;
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::InitFlickData
+// ---------------------------------------------------------------------------
+//
+void CAknPhysicsFlickTracker::InitFlickData( TAknPhysicsTrackerData& aData, 
+        const TInt& aCoordinate )
+    {
+    aData.iCoordinate = aCoordinate;
+    aData.iTime.HomeTime();
+    }
+
+
+// ---------------------------------------------------------------------------
+// CAknPhysicsFlickTracker::NormalFlickMoveTime
+// ---------------------------------------------------------------------------
+//
+TInt CAknPhysicsFlickTracker::NormalFlickMoveTime() const
+    {
+    TTime now;
+    now.HomeTime();
+    return now.MicroSecondsFrom( iNormalStartData.iTime ).Int64();
+    }