1 /*

     2 * Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Gesture helper constant definitions

    15 *

    16 */

    17 

    18 #ifndef _GESTUREDEFS_H_

    19 #define _GESTUREDEFS_H

    20 

    21 

    22 namespace GestureHelper

    23 {

    24 

    25 /// time to hold the stylus in the same position to activate holding

    26 const TInt KHoldDuration = 1000000; // microseconds 

    27 

    28 /// time to tap again for the second tap to be a double tap

    29 const TInt KMaxDoubleTapDuration = 400000; // microseconds 

    30 

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

    32 /// lifting the pointer

    33 const TInt KSpeedStopTime = 100000; // microseconds

    34 

    35 /// tolerance in degrees to either side of an angle, for direction to be the 

    36 /// same as reference angle

    37 const TReal KAngleTolerance = 25;

    38 

    39 /// Nth pointer event before the latest point

    40 const TInt KPreviousPointOffset = 3;

    41 

    42 /// Tolerance for ignoring small movements, percent of longer screen edge

    43 const TInt KGestureTolerancePercent = 4; // of 100

    44 

    45 /// Tolerance for considering it as pinch gesture for the first time

    46 const TInt KInitialPinchTolerance = 20; // Pixels

    47 

    48 /// Tolerance for considering it as pinch gesture after a pinch is detected

    49 const TInt KPinchTolerance = 5; // Pixels

    50 

    51 /** 

    52  * Panic codes 

    53  */

    54 enum TGesturePanic

    55     {

    56     EGesturePanicIllegalLogic

    57     };  

    58 

    59 /** Panics the thread */

    60 inline void Panic( TGesturePanic aReason )

    61     {

    62      _LIT( KComponentName, "GestureHelper" );

    63     User::Panic( KComponentName, aReason );

    64     }

    65 

    66 } // namespace GestureHelper

    67 

    68 #endif // _GESTUREDEFS_H