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 "pangesturerecogniser.h"

    19 #include "GenericSimpleGesture.h"

    20 #include "rt_uievent.h"

    21 

    22 #include "filelogger.h"

    23 

    24 using namespace stmGesture ;

    25 

    26 CPanGestureRecogniser::CPanGestureRecogniser(MGestureListener* aListener) : 

    27         CGestureRecogniser(aListener)

    28 {

    29 }

    30 

    31 CPanGestureRecogniser* CPanGestureRecogniser::NewL(MGestureListener* aListener)

    32 {

    33     CPanGestureRecogniser* self = new (ELeave) CPanGestureRecogniser(aListener) ;

    34     return self;

    35 }

    36 

    37 CPanGestureRecogniser::~CPanGestureRecogniser()

    38 {

    39 }

    40 

    41 TGestureRecognitionState CPanGestureRecogniser::recognise(int numOfActiveStreams,

    42         MGestureEngineIf* pge)

    43 {

    44     TGestureRecognitionState state = ENotMyGesture;

    45     // Check if we are enabled or not

    46     if (!m_gestureEnabled) return state ;

    47 

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

    49     if (numOfActiveStreams == 1)

    50     {

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

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

    53         if (!puie) return state;

    54         int countOfEvents = puie->countOfEvents() ;

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

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

    57         {

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

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

    60             // currently we only check if the last one is for us and is EMove, then we pan if the speed is OK

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

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

    63 

    64             {

    65                 if (m_loggingenabled)

    66                 {

    67                     LOGARG("CPanGestureRecogniser: Pan: num %d code %d", countOfEvents, eventCode);

    68                 }

    69                 float speedX = puie->speedX();

    70                 float speedY = puie->speedY();

    71 

    72                 using stmUiEventEngine::TUiEventSpeed;

    73 

    74                 state = EGestureActive;

    75                 TUiEventSpeed speedIf(speedX, speedY);

    76                 // Panning gesture

    77                 stmGesture::TDirectionalGesture pgest(

    78                                  KUid,

    79                                  puie->CurrentXY(),

    80                                  puie->PreviousXY(),

    81                                  &speedIf,

    82                                  m_loggingenabled);

    83 

    84                // Call the listener to inform that a Pan has occurred...

    85                m_listener->gestureEnter(pgest);

    86             }

    87         }

    88     }

    89     return state;

    90 }

    91 

    92 void CPanGestureRecogniser::release(MGestureEngineIf* /*ge*/)

    93 {

    94     m_listener->gestureExit(KUid) ;

    95 }

    96 

    97 void CPanGestureRecogniser::setPanningSpeedLow(float aSpeed) __SOFTFP

    98 {

    99     m_panningspeedlow = aSpeed ;

   100 }

   101 

   102 void CPanGestureRecogniser::setPanningSpeedHigh(float aSpeed) __SOFTFP

   103 {

   104     m_panningspeedhigh = aSpeed ;

   105 }

   106