/*

* Copyright (c) 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:  Gesture helper constant definitions

*

*/

#ifndef _XNGESTUREDEFS_H_

#define _XNGESTUREDEFS_H_

// System includes

#include <e32std.h>

/** 

 * This flag controls whether helpers emits a double tap or a tap gesture 

 * for a second tap 

 */

#define _GESTURE_DOUBLE_TAP_SUPPORT

/**

 * XnGestureHelper namespace

 * Used for the whole gesture family - Gesture recognizer, gesture helper, 

 * Point array

 */

namespace XnGestureHelper

    {

    /** time to hold the stylus in the same position to activate 

     * holding, in microseconds 

     */

    const TInt KHoldDuration = 500000; 

    /** 

     * time to tap again for the second tap to be a double tap, in 

     * microseconds 

     */

    const TInt KMaxDoubleTapDuration = 400000; 

    /** 

     * time in which speed becomes zero if user stops stylus movement before

     * lifting the pointer, in microseconds

     */ 

    const TInt KSpeedStopTime = 100000; 

    /** 

     * tolerance in degrees to either side of an angle, for direction to be 

     * the same as reference angle

     */

    const TReal KAngleTolerance = 25;

    /**  

     * maximum pointer movement from pointer down position for a gesture be 

     * a tap or hold gesture

     */

    const TInt KSamePointTolerance = 3;

    /** 

     * minimum length of a valid swipe in pixels. should be larger than 

     * KTapTolerance

     */

    const TReal KMinSwipeLength = 5;

    /** Nth pointer event before the latest point */

    const TInt KPreviousPointOffset = 3;

    /** 

     * Panic codes 

     */

    enum TGesturePanic

        {

        EGesturePanicIllegalLogic

        };

    /** 

     * Panics the thread 

     * 

     * @param aReason Panic reason

     */

    inline void Panic( TGesturePanic aReason )

        {

        _LIT( KComponentName, "XnGestureHelper" );

        User::Panic( KComponentName, aReason );

        }   

    } // namespace XnGestureHelper

#endif // _XNGESTUREDEFS_H_