--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/akntouchgesturefw/inc/akntouchgesturefwpinchrecognizer.h	Tue Feb 02 01:00:49 2010 +0200
@@ -0,0 +1,288 @@
+/*
+* 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:  Pinch touch gesture recognizer.
+*
+*/
+
+#ifndef C_AKNTOUCHGESTUREFWPINCHRECOGNIZER_H
+#define C_AKNTOUCHGESTUREFWPINCHRECOGNIZER_H
+
+#include "akntouchgesturefwbaserecognizer.h"
+
+namespace AknTouchGestureFw {
+
+
+/**
+ *  Pinch touch gesture recognizer.
+ *
+ *  @lib akntouchgesturefw
+ *  @since S60 v5.2
+ */
+NONSHARABLE_CLASS( CAknTouchGestureFwPinchRecognizer )
+    : public CAknTouchGestureFwBaseRecognizer
+    {
+
+public:
+
+    /**
+     * Two-phased constructor.
+     *
+     * @param  aEngine  The gesture recognition engine.
+     */ 
+    static CAknTouchGestureFwPinchRecognizer* NewL(
+            CAknTouchGestureFwRecognitionEngine& aEngine );
+
+    /**
+     * Two-phased constructor.
+     *
+     * @param  aEngine  The gesture recognition engine.
+     */
+    static CAknTouchGestureFwPinchRecognizer* NewLC(
+            CAknTouchGestureFwRecognitionEngine& aEngine );
+
+    /**
+     * Destructor.
+     */
+    virtual ~CAknTouchGestureFwPinchRecognizer();
+
+public: // From base class CAknTouchGestureFwBaseRecognizer.
+
+    /**
+     * Returns the recognizer gesture group.
+     * 
+     * @return @c EAknTouchGestureFwGroupPinch
+     */
+    TAknTouchGestureFwGroup GestureGroup() const;
+
+    /**
+     * Cancels the gesture recognition.
+     */
+    void CancelRecognizing();
+
+    /**
+     * Handles single pointer event.
+     * 
+     * @param  aPointerData  Pointer event related data.
+     */
+    void HandleSinglePointerEventL( const TPointerEventData& aPointerData );
+
+    /**
+     * Handles multi pointer event.
+     *
+     * @param  aPointerData            Pointer event related data.
+     * @param  aFirstPointerPosition   First pointer position.
+     * @param  aSecondPointerPosition  Second pointer position.
+     */
+    void HandleMultiPointerEventL( const TPointerEventData& aPointerData,
+                                   const TPoint& aFirstPointerPosition,
+                                   const TPoint& aSecondPointerPosition );
+
+private:
+
+    /**
+     * C++ constructor.
+     *
+     * @param  aEngine  The gesture recognition engine.
+     */
+    CAknTouchGestureFwPinchRecognizer(
+            CAknTouchGestureFwRecognitionEngine& aEngine );
+
+    /**
+     * Resets recognizer's state.
+     */
+    void Reset();
+
+    /**
+     * Starts multi-touch recognition.
+     *
+     * @param  aFirstPointerPos   Position of first pointer.
+     * @param  aSecondPointerPos  Position of second pointer.
+     */
+    void StartMultiRecognizing(
+            const TPoint& aFirstPointerPos,
+            const TPoint& aSecondPointerPos );
+
+    /**
+     * Handles multi-touch recognition cycle.
+     * Called for every drag event when one pointer is down. 
+     *
+     * @param aEventTime Time of pointer event.
+     * @param  aFirstPointerPos   New position of first pointer.
+     * @param  aSecondPointerPos  New position of second pointer.
+     */
+    void MultiRecognizeL(
+            const TTime& aEventTime,
+            const TPoint& aFirstPointerPos,
+            const TPoint& aSecondPointerPos );
+
+    /**
+     * Completes multi touch recognition.
+     * 
+     * @param aEventTime Time of pointer event.
+     */
+    void CompleteMultiRecognizingL(
+            const TTime& aEventTime );
+
+    /**
+     * Asks engine to send pinch event to observer.
+     * 
+     * @param aGestureState  Pinch gesture state.
+     * @param aMovementDelta delta movement.
+     */
+    void SendPinchEventL( 
+            TAknTouchGestureFwState aGestureState, 
+            TInt aMovementDelta );
+
+    /**
+     * Returns pinch initial threshold.
+     *
+     * @return Pinch initial threshold.
+     */
+    TInt PinchInitialThreshold() const;
+    
+    /**
+     * Returns pinch movement threshold.
+     *
+     * @return Pinch movement threshold.
+     */
+    TInt PinchMovementThreshold() const;
+    
+    /**
+     * Returns pinch direction change sensitivity.
+     * 
+     * @return pinch direction change sensitivity.
+     */
+    TInt PinchDirectionChangeSensitivity() const;
+    
+    /**
+     * Returns pinch direction reset sensitivity.
+     *
+     * @return pinch direction reset sensitivity.
+     */
+    TInt PinchDirectionResetSensitivity() const;
+    
+    /**
+     * Returns pinch dimension threshold.
+     * 
+     * @return pinch dimension threshold.
+     */
+    TInt PinchDimensionThreshold() const;
+    
+    /**
+     * Returns pinch maximum confirmation duration.
+     * 
+     * @return pinch maximum confirmation duration.
+     */
+    TInt PinchMaximumConfirmationDuration() const;
+    
+    /**
+     * Calculates bounding rect so that both aPoint1 and aPoint2 are inside
+     * the rectangle.
+     *
+     * @param aPoint1 First position.
+     * @param aPoint2 Second position.
+     * @return Bounding rect.
+     */
+    static TRect CalculateBoundingRect( 
+            const TPoint& aPoint1, 
+            const TPoint& aPoint2 );
+    
+    /**
+     * Snaps aValue to aReference if they are sufficiently close 
+     * (defined by aMargin).
+     *
+     * @param aValue Value to be checked.
+     * @param aReference Reference value.
+     * @param aMargin Margin (applied to all directions).
+     */
+    static void NormalizeValue( TInt& aValue, TInt aReference, TInt aMargin );
+    
+    /**
+     * Calculates movement value from width & height delta.
+     * 
+     * @param aWidthDelta Width delta.
+     * @param aHeightDelta Height delta.
+     * @return movement value, 0 if no movement.
+     */
+    static TInt CalculateMovement( TInt aWidthDelta, TInt aHeightDelta );
+    
+    /**
+     * Checks duration threshold.
+     * @param aEventTime Current pointer event time.
+     * @return ETrue if ok, EFalse otherwise.
+     */
+    TBool CheckDurationThreshold( const TTime& aEventTime ) const;
+    
+private: // data
+    
+    /**
+     * Boolean flag to indicate whether pinch gesture has been detected.
+     */
+    TBool iPinchDetected;
+
+    /**
+     * Current bounding rectangle for pinch.
+     */
+	TRect iPinchRect;
+	
+	/**
+	 * Direction tracer for width.
+	 */
+	TDirectionTracer iPinchWidthTracer;
+	
+	/**
+	 * Direction tracer for height.
+	 */
+	TDirectionTracer iPinchHeightTracer;
+    
+    /**
+     * Pinch width direction tracer reset counter.
+     * If height changes repeatedly without any width changes,
+     * then width direction tracer is reset.
+     */
+	TInt iResetPinchWidthTracer;
+	
+	/**
+	 * Pinch height direction tracer reset counter.
+	 * If width changes repeatedly without any height changes,
+	 * then height direction tracer is reset.
+	 */
+	TInt iResetPinchHeightTracer;
+    
+	/**
+	 * Time (from event) when iStoredWidthDelta & iStoredHeightDelta
+	 * were updated.
+	 */
+	TTime iStoredTime;
+	
+	/**
+	 * Stored width delta value.
+	 */
+	TInt iStoredWidthDelta;
+	
+	/**
+	 * Stored height delta value.
+	 */
+	TInt iStoredHeightDelta;
+	
+	/**
+	 * ETrue if continuous feedback ongoing.
+	 */
+	TBool iContinuousFeedback;
+	
+    };
+
+} // namespace AknTouchGestureFw
+
+#endif // C_AKNTOUCHGESTUREFWPINCHRECOGNIZER_H