--- a/webengine/webkitutils/stmgesturefw/src/zoomgesturerecogniser.cpp Tue Feb 02 00:56:45 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,242 +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 <e32math.h>
-#include <rt_uievent.h>
-#include "filelogger.h"
-#include "zoomgesturerecogniser.h"
-#include "GenericSimpleGesture.h"
-
-using namespace stmGesture ;
-
-_LIT8(KZoomInName, "ZoomIn") ;
-_LIT8(KZoomOutName, "ZoomOut") ;
-
-CZoomGestureRecogniser* CZoomGestureRecogniser::NewL(MGestureListener* aListener)
-{
- CZoomGestureRecogniser* self = new (ELeave) CZoomGestureRecogniser(aListener) ;
- return self;
-}
-
-CZoomGestureRecogniser::CZoomGestureRecogniser(MGestureListener* aListener) :
- CGestureRecogniser(aListener), m_area(TRect::EUninitialized)
-{
- m_rangesizeInPixels = 20 ; // by default 20 pixels from the edges is the area
- m_zooming = false ;
-}
-
-CZoomGestureRecogniser::~CZoomGestureRecogniser()
-{
-}
-
-TGestureRecognitionState CZoomGestureRecogniser::recognise(int numOfActiveStreams,
- MGestureEngineIf* pge)
-{
- TGestureRecognitionState state = ENotMyGesture;
- // Check if we are enabled or not
- if (!m_gestureEnabled) return state ;
-
- // Look at the events to see if it looks like zoom with one pointer
- if (numOfActiveStreams == 1)
- {
- const stmUiEventEngine::MUiEvent* puie = pge->getUiEvents(0);
- int countOfEvents = puie->countOfEvents();
- stmUiEventEngine::TUiEventCode eventCode = puie->Code();
-
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: %d num %d code %d",
- eventCode, countOfEvents, eventCode);
-
- }
- if (!m_zooming)
- {
- // We are not yet zoomin, check if we should start, i.e. whether we are
- // inside the zoom trigger areas near the corners when touch is done...
- if (eventCode == stmUiEventEngine::ETouch) // It must be ETouch inside the corner
- {
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: 0x%x ETouch: num %d code %d, %d",
- this, countOfEvents, puie->CurrentXY().iX, puie->CurrentXY().iY);
- LOGARG("CZoomGestureRecogniser: area, %d,%d %d,%d, range: %d", m_area.iTl.iX, m_area.iTl.iY, m_area.iBr.iX, m_area.iBr.iY, m_rangesizeInPixels);
- }
-
- // the lower left rectangle is m_rangesizeIPixels from the corner
- TRect lowerleft(m_area.iTl.iX, m_area.iBr.iY-m_rangesizeInPixels,
- m_area.iTl.iX+m_rangesizeInPixels, m_area.iBr.iY) ;
- TRect upperright(m_area.iBr.iX-m_rangesizeInPixels, m_area.iTl.iY,
- m_area.iBr.iX, m_area.iTl.iY+m_rangesizeInPixels) ;
-
- m_previoustouch = m_startingtouch = puie->CurrentXY() ;
- m_delta = 0 ;
- if (lowerleft.Contains(m_startingtouch) || upperright.Contains(m_startingtouch))
- {
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: ZOOM IN/OUT, (%d,%d) in %d,%d %d,%d, range: %d",
- m_startingtouch.iX, m_startingtouch.iY,
- m_area.iTl.iX, m_area.iTl.iY, m_area.iBr.iX, m_area.iBr.iY,
- m_rangesizeInPixels);
- }
- m_zooming = true ;
- if (lowerleft.Contains(m_startingtouch))
- {
- m_zoomtype = EZoomIn ;
- }
- else
- {
- m_zoomtype = EZoomOut ;
- }
- state = ELockToThisGesture ; // keep zooming until release
- TTwoPointGesture pgest(KUid, m_startingtouch, m_startingtouch);
- pgest.setLogging(m_loggingenabled) ;
- pgest.setDetails(m_delta) ;
- pgest.setName(m_zoomtype == EZoomIn ? KZoomInName() : KZoomOutName()) ;
- pgest.setType(m_zoomtype);
-
- // Call the listener to inform that a gesture has happened
- m_listener->gestureEnter(pgest) ;
- }
- else
- {
- // It is not our gesture so do nothing...
- }
- }
- else
- {
- // It is not touch, so not our initiating UI event.. do nothing
- }
- }
- else
- {
- // We are already zooming, calculate the changes in zooming factor if it looks we are still zooming
- if (eventCode == stmUiEventEngine::ERelease) // ERelease stops zooming
- {
- // We were zooming, but if there are multiple touches we are not any more
- m_listener->gestureExit(KUid) ; // should we call this or not?
- }
- else // all other UI events will keep on zooming
- {
- state = ELockToThisGesture ; // Keep the gesture
- const TPoint& p = puie->CurrentXY() ;
- float newdist = calculateDistance(p) ;
- float olddist = calculateDistance(m_previoustouch) ;
- m_previoustouch = p ;
- m_delta = adjustZoom(olddist, newdist) ;
- state = EGestureActive ;
-
- // Inform listener only if there is something to say
- if (m_delta != 0)
- {
- TTwoPointGesture pgest = TTwoPointGesture(KUid, p, m_startingtouch);
- pgest.setLogging(m_loggingenabled) ;
- pgest.setDetails(m_delta) ;
- pgest.setName(m_zoomtype == EZoomIn ? KZoomInName() : KZoomOutName()) ;
- pgest.setType(m_zoomtype);
-
- // Call the listener to inform that a gesture has happened
- m_listener->gestureEnter(pgest) ;
- }
- }
- }
- }
- else
- {
- if (m_zooming)
- {
- // We were zooming, but if there are multiple touches we are not any more
- m_listener->gestureExit(KUid) ; // should we call this or not?
- }
- m_zooming = false ;
- }
- return state;
-}
-
-void CZoomGestureRecogniser::release(MGestureEngineIf*)
-{
- if (m_zooming)
- {
- m_zooming = false ;
- m_listener->gestureExit(KUid) ; // should we call this or not?
- }
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: 0x%x release", this);
- }
-}
-
-void CZoomGestureRecogniser::setRange(int rangeInPixels)
-{
- m_rangesizeInPixels = rangeInPixels ;
-}
-
-void CZoomGestureRecogniser::setArea(const TRect& theArea)
-{
- m_area = theArea ;
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: set area, %d,%d %d,%d",
- m_area.iTl.iX, m_area.iTl.iY, m_area.iBr.iX, m_area.iBr.iY);
- }
-}
-
-/*!
- * calculate the distance, return as as float
- */
-float CZoomGestureRecogniser::calculateDistance(const TPoint& tp)
-{
- double x = ((m_startingtouch.iX-tp.iX)*(m_startingtouch.iX-tp.iX)) +
- ((m_startingtouch.iY-tp.iY)*(m_startingtouch.iY-tp.iY)) ;
- double ddist ;
- Math::Sqrt(ddist, x) ;
- return ddist ;
-}
-
-int CZoomGestureRecogniser::adjustZoom(float& aPreviousDistance, float aNewDistance)
-{
- float diff = aNewDistance - aPreviousDistance ;
- float logdiff = diff ;
- if (diff < 0) diff = -diff ;
- float changePercentage = (diff/aPreviousDistance)*100.f ;
- if (changePercentage > 10.f)
- {
- // change more than 10%, make at most 10%
- float newdiff = aPreviousDistance*0.1f;
- if (aPreviousDistance > aNewDistance) newdiff = -newdiff ;
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: adjust zoom from %f to %f : was, now %f %f",
- double(logdiff), double(newdiff), double(aPreviousDistance), double(aNewDistance));
- }
-
- aPreviousDistance = aPreviousDistance + newdiff ;
- diff = newdiff ;
-
- }
- else
- {
- if (m_loggingenabled)
- {
- LOGARG("CZoomGestureRecogniser: adjust zoom from %f to %f : was, now %f %f",
- double(logdiff), double(diff), double(aPreviousDistance), double(aNewDistance));
- }
- aPreviousDistance = aNewDistance ; // accept the new value and update the new length
- diff = logdiff ; // put the original back
- }
- return (int)diff ;
-}