--- a/webengine/webkitutils/stmgesturefw/src/gestureengine.cpp Tue Feb 02 00:56:45 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,275 +0,0 @@
-/*
-* 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 the License "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 implementation
-*
-*/
-
-#include "GestureEngine.h"
-
-#include "filelogger.h"
-
-
-using namespace stmGesture ;
-
-CGestureEngine::CGestureEngine()
-{
- m_numOfActiveStreams = 0 ;
- m_currentGestureOwner = -1 ;
- m_currentLockedGesture = -1 ;
- for (int i = 0; i < stmUiEventEngine::KMaxNumberOfPointers; i++)
- {
- m_uiEventStream[i] = NULL ;
- }
-}
-
-CGestureEngine::~CGestureEngine()
-{
- m_gestures.Reset() ;
-}
-
-bool CGestureEngine::addGesture(const MGestureRecogniserIf* aNewGesture)
-{
- // Add the new gesture recogniser to our list of recognisers
- return m_gestures.Append(aNewGesture) == 0;
-}
-
-bool CGestureEngine::insertGesture(const MGestureRecogniserIf* aNewGesture)
-{
- return insertGestureAt(aNewGesture, 0) == 0;
-}
-
-bool CGestureEngine::insertGestureAt(const MGestureRecogniserIf* aNewGesture, int position)
-{
- return m_gestures.Insert(aNewGesture, position) == 0 ;
-}
-
-bool CGestureEngine::removeGesture(const MGestureRecogniserIf* aOldGesture)
-{
- // If gestures are removed, there cannot be current gesture owner...
- if (m_currentGestureOwner != -1)
- {
- MGestureRecogniserIf* pgrif = m_gestures[m_currentGestureOwner] ;
- pgrif->release(this) ;
- m_currentGestureOwner = -1 ; // no more gesture owners...
- }
- TInt ix = m_gestures.Find(aOldGesture) ;
- bool found = (ix != -1);
- if (found)
- {
- m_gestures.Remove(ix) ;
- }
- return found ;
-}
-
-int CGestureEngine::activeStreamCount() const
-{
- return m_numOfActiveStreams ;
-}
-
-const stmUiEventEngine::MUiEvent* CGestureEngine::getUiEvents(int indexOfActiveStream) const
-{
-#if defined(ADVANCED_POINTER_EVENTS)
- // create temporary array of active event streams and initialize with zero
- const stmUiEventEngine::MUiEvent* activeEventPointers[stmUiEventEngine::KMaxNumberOfPointers] ;
- for (int x = 0; x < stmUiEventEngine::KMaxNumberOfPointers; x++) activeEventPointers[x] = 0 ;
- // then fill from currently active event streams
- int indextoactiveEventPointers = 0 ;
- for (int i = 0; i < stmUiEventEngine::KMaxNumberOfPointers; i++)
- {
- if (m_uiEventStream[i])
- activeEventPointers[indextoactiveEventPointers++] = m_uiEventStream[i] ;
- }
- // then return the active event stream asked
- return activeEventPointers[indexOfActiveStream] ;
-#else
- // in single touch it is enough to return the only possible pointer
- return m_uiEventStream[indexOfActiveStream] ;
-#endif
-}
-
-/*!
- * Process the UI events
- */
-void CGestureEngine::HandleUiEventL(const stmUiEventEngine::MUiEvent& aEvent )
-{
- // process one incoming UI event
- storeUiEvent(aEvent) ; // store the event to the "stream" based on the index of pointer
- walkTroughGestures() ; // and walk trough the gestures to process the UI event
- updateUiEvents() ;
- // If it was last release event, make sure no-one has the gestures locked
- m_numOfActiveStreams = 0 ;
- for (int i = 0; i < stmUiEventEngine::KMaxNumberOfPointers; i++)
- {
- if (m_uiEventStream[i]) m_numOfActiveStreams++ ;
- }
- if (m_numOfActiveStreams == 0)
- {
- if (m_currentLockedGesture != -1)
- {
- MGestureRecogniserIf* pgrif = m_gestures[m_currentLockedGesture] ;
- pgrif->release(this) ;
- }
- m_currentLockedGesture = -1 ;
- }
-}
-
-/*!
- * Store the UI event. There are max X "streams" of events, one for each
- * pointer. The streams are actually just pointers to the latest event, since the
- * MUiEvent interface has methods to walk trough the chain of events.
- */
-void CGestureEngine::storeUiEvent(const stmUiEventEngine::MUiEvent& aEvent)
-{
- m_uiEventStream[aEvent.Index()] = &aEvent ;
- m_numOfActiveStreams = 0 ;
- for (int i = 0; i < stmUiEventEngine::KMaxNumberOfPointers; i++)
- {
- if (m_uiEventStream[i]) m_numOfActiveStreams++ ;
- }
-}
-
-/*!
- * Call each gesture handler in turn until one claims to be in control of the gesture.
- */
-void CGestureEngine::walkTroughGestures()
-{
- int newowner = -1 ;
- int newlocker = m_currentLockedGesture ;
- // check if someone has locked the gesture
- TGestureRecognitionState thestate = ENotMyGesture ;
- if (m_currentLockedGesture != -1)
- {
- MGestureRecogniserIf* pgrif = m_gestures[m_currentLockedGesture] ;
- if (pgrif)
- {
- if (m_loggingEnabled)
- {
- // log entry about locked gesture (hmm.. should have added names to the MGestureRecogniserIf
- LOGARG("locked gesture recognizer %d (addr %d), active streams %d",
- m_currentLockedGesture, pgrif, m_numOfActiveStreams);
- }
-
- thestate = pgrif->recognise(m_numOfActiveStreams, this) ;
- switch (thestate)
- {
- case EGestureActive:
- {
- // This gesture recogniser owns the gesture, so release the lock
- newlocker = -1 ;
- newowner = m_currentLockedGesture ;
- if (m_loggingEnabled)
- {
- LOGARG("new owner %d lock release", m_currentLockedGesture);
- }
- break;
- }
- case ELockToThisGesture:
- {
- // this gesture recogniser wants to keep the lock
- newowner = m_currentLockedGesture ;
- newlocker = m_currentLockedGesture ;
- if (m_loggingEnabled)
- {
- LOGARG("new owner %d keep lock", m_currentLockedGesture);
- }
- break;
-
- }
- case ENotMyGesture:
- {
- break;
- }
- }
- }
- else
- {
- if (m_loggingEnabled)
- {
- LOGARG("NULL recogniser for %d", m_currentLockedGesture);
- }
- }
- }
-
- if (thestate == ENotMyGesture)
- {
- if (m_loggingEnabled)
- {
- LOGARG("walk trough recognizers active streams %d", m_numOfActiveStreams);
- }
- // No locking gesture, walk trough the list until someone handles this
- for (int i = 0; i < m_gestures.Count(); i++)
- {
- bool controlObtained = false;
- MGestureRecogniserIf* pgrif = m_gestures[i];
- if (pgrif)
- {
- switch (pgrif->recognise(m_numOfActiveStreams, this))
- {
- case EGestureActive:
- {
- // This gesture recogniser owns the gesture, stop looping...
- controlObtained = true;
- newowner = i;
- break;
- }
- case ELockToThisGesture:
- {
- // this gesture recogniser wants to take ownership
- controlObtained = true;
- newowner = i;
- newlocker = i;
- break;
-
- }
- case ENotMyGesture:
- {
- break;
- }
- }
- }
- if (controlObtained)
- {
- break; // do not process rest of the gestures
- }
-
- }
- }
- if (newowner != -1 && newowner != m_currentGestureOwner)
- {
- if (m_currentGestureOwner != -1)
- {
- MGestureRecogniserIf* pgrif = m_gestures[m_currentGestureOwner] ;
- pgrif->release(this) ;
- }
- m_currentGestureOwner = newowner ;
- }
- m_currentLockedGesture = newlocker ; // if someone locked it or released the lock
-}
-
-void CGestureEngine::updateUiEvents()
-{
- for (int i = 0; i < stmUiEventEngine::KMaxNumberOfPointers; i++)
- {
- if (m_uiEventStream[i])
- {
- if (m_uiEventStream[i]->Code() == stmUiEventEngine::ERelease)
- {
- // Event can be removed since Release is the last event
- // note that it is the lower layer event engine
- // which actually deletes the object
- m_uiEventStream[i] = NULL ;
- }
- }
- }
-}