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 the License "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 implementation

    15 *

    16 */

    17 

    18 #include "updowngesturerecogniser.h"

    19 #include "GenericSimpleGesture.h"

    20 #include "rt_uievent.h"

    21 

    22 #include "filelogger.h"

    23 

    24 using namespace stmGesture ;

    25 

    26 _LIT8(KUpdownName, "Updown") ;

    27 

    28 CUpdownGestureRecogniser::CUpdownGestureRecogniser(MGestureListener* aListener) : 

    29         CGestureRecogniser(aListener)

    30 {

    31 }

    32 

    33 CUpdownGestureRecogniser* CUpdownGestureRecogniser::NewL(MGestureListener* aListener)

    34 {

    35     CUpdownGestureRecogniser* self = new (ELeave) CUpdownGestureRecogniser(aListener) ;

    36     return self;

    37 }

    38 

    39 CUpdownGestureRecogniser::~CUpdownGestureRecogniser()

    40 {

    41 }

    42 

    43 TGestureRecognitionState CUpdownGestureRecogniser::recognise(int numOfActiveStreams,

    44         MGestureEngineIf* pge)

    45 {

    46     TGestureRecognitionState state = ENotMyGesture;

    47     // Check if we are enabled or not

    48     if (!m_gestureEnabled) return state ;

    49 

    50     // Look at the events to see if it looks like a tap or double tap

    51     if (numOfActiveStreams == 1)

    52     {

    53         // Then look at the event stream, it has to be tap and release

    54         const stmUiEventEngine::MUiEvent* puie = pge->getUiEvents(0);

    55         int countOfEvents = puie->countOfEvents() ;

    56         stmUiEventEngine::TUiEventCode eventCode = puie->Code() ;

    57         if (countOfEvents > 1) // do we have more than one event in the stream?

    58         {

    59             // Then look at the events to see if they are suitable for us

    60             // should we check that all of the events are targeted to our window?

    61             // currently we only check if the last one is for us and is EMove, then check if |x| > |y|

    62             if (puie->Target() == m_powner &&

    63                     eventCode == stmUiEventEngine::EMove) // The last one is move in our window

    64 

    65             {

    66                 if (m_loggingenabled)

    67                 {

    68                     LOGARG("CUpdownGestureRecogniser: UpDown: num %d code %d", 

    69                             countOfEvents, eventCode);

    70                 }

    71                 // Is it leftright gesture in our window?

    72                 const TPoint& p = puie->CurrentXY() ;

    73                 TPoint dp = p - puie->PreviousXY() ;

    74                 // check that the Y movement is bigger

    75                 if (Abs(dp.iX) < Abs(dp.iY))

    76                 {

    77                     state = EGestureActive;

    78                     stmGesture::TGenericSimpleGesture pgest(KUid, p, dp.iY, puie) ;

    79                     // Give the gesture a name

    80                     pgest.setName(KUpdownName) ;

    81                     // Call the listener to inform that a UpDown has occurred...

    82                     m_listener->gestureEnter(pgest) ;

    83                 }

    84             }

    85         }

    86     }

    87     return state;

    88 }

    89 

    90 void CUpdownGestureRecogniser::release(MGestureEngineIf* /*ge*/)

    91 {

    92     m_listener->gestureExit(KUid) ;

    93 }

    94