webengine/webkitutils/stmgesturefw/src/flickgesturerecogniser.cpp
changeset 42 d39add9822e2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/webkitutils/stmgesturefw/src/flickgesturerecogniser.cpp	Tue Feb 02 00:56:45 2010 +0200
@@ -0,0 +1,114 @@
+/*
+* 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 "GenericSimpleGesture.h"
+#include "flickgesturerecogniser.h"
+#include "rt_uievent.h"
+#include "filelogger.h"
+//#include "flogger.h"
+
+using namespace stmGesture ;
+
+CFlickGestureRecogniser::CFlickGestureRecogniser(MGestureListener* aListener) :
+    CGestureRecogniser(aListener)
+{
+}
+
+CFlickGestureRecogniser* CFlickGestureRecogniser::NewL(MGestureListener* aListener)
+{
+    CFlickGestureRecogniser* self = new (ELeave) CFlickGestureRecogniser(aListener) ;
+    return self;
+}
+
+CFlickGestureRecogniser::~CFlickGestureRecogniser()
+{
+}
+/*!
+ * Release gesture recogniser.  Note that this one never owns the gesture, it just calls
+ * the callback if it detects ERelease inside the area being watched.
+ * There could be also check for the target window?
+ */
+TGestureRecognitionState CFlickGestureRecogniser::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 flick with one pointer
+    if (numOfActiveStreams == 1)
+    {
+        const stmUiEventEngine::MUiEvent* puie = pge->getUiEvents(0);
+        if (!puie) return state;
+        int countOfEvents = puie->countOfEvents();
+        stmUiEventEngine::TUiEventCode eventCode = puie->Code();
+        if (m_loggingenabled)
+        {
+            LOGARG("CFlickGestureRecogniser: %d num %d code %d", eventCode, countOfEvents, eventCode);
+
+        }
+        if (m_powner == puie->Target() && eventCode == stmUiEventEngine::ERelease)
+        {
+            if (m_loggingenabled)
+            {
+                LOGARG("CFlickGestureRecogniser: 0x%x ERelease: num %d code %d, %d", this, countOfEvents, puie->CurrentXY().iX, puie->CurrentXY().iY);
+            }
+            // Check if the speed before release was fast enough for flick
+            const stmUiEventEngine::MUiEvent* puieprev = puie->previousEvent() ;
+            if (puieprev && puieprev->Code() == stmUiEventEngine::EMove)
+            {
+                using stmUiEventEngine::TUiEventSpeed;
+
+                float thespeedX = puieprev->speedX() ;
+                float thespeedY = puieprev->speedY() ;
+                if (m_loggingenabled)
+                {
+                    LOGARG("CFlickGestureRecogniser: prev speed: %f (limit: %f)", double(thespeedX), double(m_speed)) ;
+                }
+                if (Abs( thespeedX) >= m_speed || Abs( thespeedY) >= m_speed )
+                {
+                    state = EGestureActive ;
+
+                    TUiEventSpeed speedIf(thespeedX, thespeedY);
+
+                    // issue the flick gesture using the TDirectionalGesture (it has the speed and direction)
+                    stmGesture::TDirectionalGesture pgest(
+                            KUid,
+                            puieprev->CurrentXY(),
+                            puieprev->PreviousXY(),
+                            &speedIf,
+                            m_loggingenabled);
+
+                    // Call the listener to inform that a flick has occurred...
+                    m_listener->gestureEnter(pgest);
+                }
+            }
+        }
+    }
+    return state;
+}
+void CFlickGestureRecogniser::release(MGestureEngineIf* /*ge*/)
+{
+    if (m_loggingenabled)
+    {
+        LOGARG("CFlickGestureRecogniser: 0x%x flick", this);
+    }
+}
+void CFlickGestureRecogniser::setFlickingSpeed(float aSpeed) __SOFTFP
+{
+    m_speed = aSpeed ;
+}