--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hbcore/effects/hbeffectanimation.cpp	Mon Apr 19 14:02:13 2010 +0300
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (developer.feedback@nokia.com)
+**
+** This file is part of the HbCore module of the UI Extensions for Mobile.
+**
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this file.
+** Please review the following information to ensure the GNU Lesser General
+** Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at developer.feedback@nokia.com.
+**
+****************************************************************************/
+#include <hbglobal.h>
+#include "hbeffectanimation_p.h"
+#include "hbeffectgroup_p.h"
+#include "hbeffectdef_p.h"
+#include "hbeffectfxmldata_p.h"
+#include <QGraphicsItem>
+#include <QtDebug>
+
+HbEffectAnimation::HbEffectAnimation() :
+    QVariantAnimation(),
+    mCurve(QEasingCurve::Linear),
+    mLoopStart(-1),
+    mLoopEnd(-1),
+    mInactive(false),
+    mFinished(false)
+{
+    connect(this, SIGNAL(finished()), this, SLOT(handleFinished()));
+}
+
+HbEffectAnimation::~HbEffectAnimation()
+{
+}
+
+void HbEffectAnimation::addLooping(const HbEffectFxmlParamData *param, HbEffectGroup *group)
+{
+    if (param) {
+        if (param->loopDefined()) {
+            int duration = QVariantAnimation::duration();
+
+            int loopStart = (int)(param->loopStart() * float(duration));
+            int loopEnd = (int)(param->loopEnd() * float(duration));
+
+            // Limit given values to valid range
+            loopStart = qBound(0, loopStart, duration);
+            loopEnd = qBound(0, loopEnd, duration);
+
+            // Add looping range to animation if loop end is after its start
+            if (loopEnd > loopStart) {
+                mLoopStart = loopStart;
+                mLoopEnd = loopEnd;
+                group->setLooping(true);
+            }
+        }
+    }
+}
+
+void HbEffectAnimation::updateCurrentValue(const QVariant &value)
+{
+    if (mInactive) {
+        return;
+    }
+
+    // If there is a loop defined, check whether the current time of
+    // the animation is past the loop end. If it is, do not update the effect with that value
+    // but instead change the current time back to (loopStartTime + currentTime - LoopEndTime).
+
+    if (looping()) {
+        int current = currentTime();
+
+        if (current > mLoopEnd) {
+            int newCurrentTime = mLoopStart + current - mLoopEnd;
+            
+            // If the calculated new current time is again beyond the loop end,
+            // change it to the loop end to avoid infinite recursion.
+            if (newCurrentTime > mLoopEnd) {
+                newCurrentTime = mLoopEnd;
+            }
+
+            //qDebug() << "Loop restarted: current time changed from" << current << "to" << newCurrentTime;
+            
+            // Set the current time of the animation according to the defined loop,
+            // it will create a callback to this function again.
+            setCurrentTime(newCurrentTime);
+            return;
+        }
+    }
+
+    // Create a callback to derived classes
+    handleAnimationUpdate(value);
+}
+
+void HbEffectAnimation::handleFinished()
+{
+    // Restart loop if the animation is looping
+    if (looping()) {
+        int current = currentTime();
+        int newCurrentTime = mLoopStart + current - mLoopEnd;
+        
+        // If the calculated new current time is again beyond the loop end,
+        // change it to the loop end to avoid infinite recursion.
+        if (newCurrentTime > mLoopEnd) {
+            newCurrentTime = mLoopEnd;
+        }
+
+        //qDebug() << "Loop restarted: current time changed from" << current << "to" << newCurrentTime;
+        
+        // Temporarily prevent the animation from reacting to update request,
+        // because start() causes update with time=0 and the loop might start from a later point of time.
+        mInactive = true;
+        // Restart the animation
+        start();
+        mInactive = false;
+        // Set the current time of the animation according to the defined loop.
+        setCurrentTime(newCurrentTime);
+    }
+    // Otherwise handle finish
+    else {
+        mFinished = true;
+        // Create a callback to derived classes
+        handleAnimationFinish();
+    }
+}
+
+QVariant HbEffectAnimation::interpolated(const QVariant &from, const QVariant &to, qreal progress) const
+{
+    // Interpolation is handled here so that we can apply curve shape to each keyframe separately.
+    // QVariantAnimation would apply the curve shape to the whole animation.
+
+    qreal fromValue = qVariantValue<qreal>(from);
+    qreal toValue = qVariantValue<qreal>(to);
+
+    return fromValue + mCurve.valueForProgress(progress) * (toValue - fromValue);
+}
+
+// End of File
+
+
+
+