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Branched from the monolithic repo, Qt master branch, at commit
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1 files changed, 1055 insertions, 0 deletions

diff --git a/src/corelib/animation/qabstractanimation.cpp b/src/corelib/animation/qabstractanimation.cpp
new file mode 100644
index 0000000000..602cf8a6fd
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+++ b/src/corelib/animation/qabstractanimation.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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 qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QAbstractAnimation
+    \ingroup animation
+    \brief The QAbstractAnimation class is the base of all animations.
+    \since 4.6
+
+    The class defines the functions for the functionality shared by
+    all animations. By inheriting this class, you can create custom
+    animations that plug into the rest of the animation framework.
+
+    The progress of an animation is given by its current time
+    (currentLoopTime()), which is measured in milliseconds from the start
+    of the animation (0) to its end (duration()). The value is updated
+    automatically while the animation is running. It can also be set
+    directly with setCurrentTime().
+
+    At any point an animation is in one of three states:
+    \l{QAbstractAnimation::}{Running},
+    \l{QAbstractAnimation::}{Stopped}, or
+    \l{QAbstractAnimation::}{Paused}--as defined by the
+    \l{QAbstractAnimation::}{State} enum. The current state can be
+    changed by calling start(), stop(), pause(), or resume(). An
+    animation will always reset its \l{currentTime()}{current time}
+    when it is started. If paused, it will continue with the same
+    current time when resumed. When an animation is stopped, it cannot
+    be resumed, but will keep its current time (until started again).
+    QAbstractAnimation will emit stateChanged() whenever its state
+    changes.
+
+    An animation can loop any number of times by setting the loopCount
+    property. When an animation's current time reaches its duration(),
+    it will reset the current time and keep running. A loop count of 1
+    (the default value) means that the animation will run one time.
+    Note that a duration of -1 means that the animation will run until
+    stopped; the current time will increase indefinitely. When the
+    current time equals duration() and the animation is in its
+    final loop, the \l{QAbstractAnimation::}{Stopped} state is
+    entered, and the finished() signal is emitted.
+
+    QAbstractAnimation provides pure virtual functions used by
+    subclasses to track the progress of the animation: duration() and
+    updateCurrentTime(). The duration() function lets you report a
+    duration for the animation (as discussed above). The animation
+    framework calls updateCurrentTime() when current time has changed.
+    By reimplementing this function, you can track the animation
+    progress. Note that neither the interval between calls nor the
+    number of calls to this function are defined; though, it will
+    normally be 60 updates per second.
+
+    By reimplementing updateState(), you can track the animation's
+    state changes, which is particularly useful for animations that
+    are not driven by time.
+
+    \sa QVariantAnimation, QPropertyAnimation, QAnimationGroup, {The Animation Framework}
+*/
+
+/*!
+    \enum QAbstractAnimation::DeletionPolicy
+
+    \value KeepWhenStopped The animation will not be deleted when stopped.
+    \value DeleteWhenStopped The animation will be automatically deleted when
+    stopped.
+*/
+
+/*!
+    \fn QAbstractAnimation::finished()
+
+    QAbstractAnimation emits this signal after the animation has stopped and
+    has reached the end.
+
+    This signal is emitted after stateChanged().
+
+    \sa stateChanged()
+*/
+
+/*!
+    \fn QAbstractAnimation::stateChanged(QAbstractAnimation::State newState, QAbstractAnimation::State oldState)
+
+    QAbstractAnimation emits this signal whenever the state of the animation has
+    changed from \a oldState to \a newState. This signal is emitted after the virtual
+    updateState() function is called.
+
+    \sa updateState()
+*/
+
+/*!
+    \fn QAbstractAnimation::currentLoopChanged(int currentLoop)
+
+    QAbstractAnimation emits this signal whenever the current loop
+    changes. \a currentLoop is the current loop.
+
+    \sa currentLoop(), loopCount()
+*/
+
+/*!
+    \fn QAbstractAnimation::directionChanged(QAbstractAnimation::Direction newDirection);
+
+    QAbstractAnimation emits this signal whenever the direction has been
+    changed. \a newDirection is the new direction.
+
+    \sa direction
+*/
+
+#include "qabstractanimation.h"
+#include "qanimationgroup.h"
+
+#include <QtCore/qdebug.h>
+
+#include "qabstractanimation_p.h"
+
+#include <QtCore/qmath.h>
+#include <QtCore/qthreadstorage.h>
+#include <QtCore/qcoreevent.h>
+#include <QtCore/qpointer.h>
+
+#ifndef QT_NO_ANIMATION
+
+#define DEFAULT_TIMER_INTERVAL 16
+#define STARTSTOP_TIMER_DELAY 0
+
+QT_BEGIN_NAMESPACE
+
+#ifndef QT_NO_THREAD
+Q_GLOBAL_STATIC(QThreadStorage<QUnifiedTimer *>, unifiedTimer)
+#endif
+
+QUnifiedTimer::QUnifiedTimer() :
+    QObject(), defaultDriver(this), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
+    currentAnimationIdx(0), insideTick(false), consistentTiming(false), slowMode(false),
+    slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0)
+{
+    time.invalidate();
+    driver = &defaultDriver;
+}
+
+
+QUnifiedTimer *QUnifiedTimer::instance(bool create)
+{
+    QUnifiedTimer *inst;
+#ifndef QT_NO_THREAD
+    if (create && !unifiedTimer()->hasLocalData()) {
+        inst = new QUnifiedTimer;
+        unifiedTimer()->setLocalData(inst);
+    } else {
+        inst = unifiedTimer()->localData();
+    }
+#else
+    static QUnifiedTimer unifiedTimer;
+    inst = &unifiedTimer;
+#endif
+    return inst;
+}
+
+QUnifiedTimer *QUnifiedTimer::instance()
+{
+    return instance(true);
+}
+
+void QUnifiedTimer::ensureTimerUpdate()
+{
+    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
+    if (inst && inst->isPauseTimerActive)
+        inst->updateAnimationsTime();
+}
+
+void QUnifiedTimer::updateAnimationsTime()
+{
+    //setCurrentTime can get this called again while we're the for loop. At least with pauseAnimations
+    if(insideTick)
+        return;
+
+    qint64 totalElapsed = time.elapsed();
+    // ignore consistentTiming in case the pause timer is active
+    int delta = (consistentTiming && !isPauseTimerActive) ?
+                        timingInterval : totalElapsed - lastTick;
+    if (slowMode) {
+        if (slowdownFactor > 0)
+            delta = qRound(delta / slowdownFactor);
+        else
+            delta = 0;
+    }
+
+    lastTick = totalElapsed;
+
+    //we make sure we only call update time if the time has actually changed
+    //it might happen in some cases that the time doesn't change because events are delayed
+    //when the CPU load is high
+    if (delta) {
+        insideTick = true;
+        for (currentAnimationIdx = 0; currentAnimationIdx < animations.count(); ++currentAnimationIdx) {
+            QAbstractAnimation *animation = animations.at(currentAnimationIdx);
+            int elapsed = QAbstractAnimationPrivate::get(animation)->totalCurrentTime
+                          + (animation->direction() == QAbstractAnimation::Forward ? delta : -delta);
+            animation->setCurrentTime(elapsed);
+        }
+        insideTick = false;
+        currentAnimationIdx = 0;
+    }
+}
+
+void QUnifiedTimer::updateAnimationTimer()
+{
+    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
+    if (inst)
+        inst->restartAnimationTimer();
+}
+
+void QUnifiedTimer::restartAnimationTimer()
+{
+    if (runningLeafAnimations == 0 && !runningPauseAnimations.isEmpty()) {
+        int closestTimeToFinish = closestPauseAnimationTimeToFinish();
+        if (closestTimeToFinish < 0) {
+            qDebug() << runningPauseAnimations;
+            qDebug() << closestPauseAnimationTimeToFinish();
+        }
+        driver->stop();
+        animationTimer.start(closestTimeToFinish, this);
+        isPauseTimerActive = true;
+    } else if (!driver->isRunning() || isPauseTimerActive) {
+        driver->start();
+        isPauseTimerActive = false;
+    }
+}
+
+void QUnifiedTimer::setTimingInterval(int interval)
+{
+    timingInterval = interval;
+
+    if (driver->isRunning() && !isPauseTimerActive) {
+        //we changed the timing interval
+        driver->stop();
+        driver->start();
+    }
+}
+
+
+void QUnifiedTimer::timerEvent(QTimerEvent *event)
+{
+    //in the case of consistent timing we make sure the orders in which events come is always the same
+   //for that purpose we do as if the startstoptimer would always fire before the animation timer
+    if ((consistentTiming && startStopAnimationTimer.isActive()) ||
+        event->timerId() == startStopAnimationTimer.timerId()) {
+        startStopAnimationTimer.stop();
+
+        //we transfer the waiting animations into the "really running" state
+        animations += animationsToStart;
+        animationsToStart.clear();
+        if (animations.isEmpty()) {
+            animationTimer.stop();
+            isPauseTimerActive = false;
+            // invalidate the start reference time
+            time.invalidate();
+        } else {
+            restartAnimationTimer();
+            if (!time.isValid()) {
+                lastTick = 0;
+                time.start();
+            }
+        }
+    }
+
+    if (event->timerId() == animationTimer.timerId()) {
+        // update current time on all top level animations
+        updateAnimationsTime();
+        restartAnimationTimer();
+    }
+}
+
+void QUnifiedTimer::registerAnimation(QAbstractAnimation *animation, bool isTopLevel)
+{
+    QUnifiedTimer *inst = instance(true); //we create the instance if needed
+    inst->registerRunningAnimation(animation);
+    if (isTopLevel) {
+        Q_ASSERT(!QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer);
+        QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer = true;
+        inst->animationsToStart << animation;
+        if (!inst->startStopAnimationTimer.isActive())
+            inst->startStopAnimationTimer.start(STARTSTOP_TIMER_DELAY, inst);
+    }
+}
+
+void QUnifiedTimer::unregisterAnimation(QAbstractAnimation *animation)
+{
+    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
+    if (inst) {
+        //at this point the unified timer should have been created
+        //but it might also have been already destroyed in case the application is shutting down
+
+        inst->unregisterRunningAnimation(animation);
+
+        if (!QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer)
+            return;
+
+        int idx = inst->animations.indexOf(animation);
+        if (idx != -1) {
+            inst->animations.removeAt(idx);
+            // this is needed if we unregister an animation while its running
+            if (idx <= inst->currentAnimationIdx)
+                --inst->currentAnimationIdx;
+
+            if (inst->animations.isEmpty() && !inst->startStopAnimationTimer.isActive())
+                inst->startStopAnimationTimer.start(STARTSTOP_TIMER_DELAY, inst);
+        } else {
+            inst->animationsToStart.removeOne(animation);
+        }
+    }
+    QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer = false;
+}
+
+void QUnifiedTimer::registerRunningAnimation(QAbstractAnimation *animation)
+{
+    if (QAbstractAnimationPrivate::get(animation)->isGroup)
+        return;
+
+    if (QAbstractAnimationPrivate::get(animation)->isPause) {
+        runningPauseAnimations << animation;
+    } else
+        runningLeafAnimations++;
+}
+
+void QUnifiedTimer::unregisterRunningAnimation(QAbstractAnimation *animation)
+{
+    if (QAbstractAnimationPrivate::get(animation)->isGroup)
+        return;
+
+    if (QAbstractAnimationPrivate::get(animation)->isPause)
+        runningPauseAnimations.removeOne(animation);
+    else
+        runningLeafAnimations--;
+    Q_ASSERT(runningLeafAnimations >= 0);
+}
+
+int QUnifiedTimer::closestPauseAnimationTimeToFinish()
+{
+    int closestTimeToFinish = INT_MAX;
+    for (int i = 0; i < runningPauseAnimations.size(); ++i) {
+        QAbstractAnimation *animation = runningPauseAnimations.at(i);
+        int timeToFinish;
+
+        if (animation->direction() == QAbstractAnimation::Forward)
+            timeToFinish = animation->duration() - animation->currentLoopTime();
+        else
+            timeToFinish = animation->currentLoopTime();
+
+        if (timeToFinish < closestTimeToFinish)
+            closestTimeToFinish = timeToFinish;
+    }
+    return closestTimeToFinish;
+}
+
+void QUnifiedTimer::installAnimationDriver(QAnimationDriver *d)
+{
+    if (driver->isRunning()) {
+        qWarning("QUnifiedTimer: Cannot change animation driver while animations are running");
+        return;
+    }
+
+    if (driver && driver != &defaultDriver)
+        delete driver;
+
+    driver = d;
+}
+
+/*!
+   \class QAnimationDriver
+
+   \brief The QAnimationDriver class is used to exchange the mechanism that drives animations.
+
+   The default animation system is driven by a timer that fires at regular intervals.
+   In some scenarios, it is better to drive the animation based on other synchronization
+   mechanisms, such as the vertical refresh rate of the screen.
+
+   \internal
+ */
+
+QAnimationDriver::QAnimationDriver(QObject *parent)
+    : QObject(*(new QAnimationDriverPrivate), parent)
+{
+}
+
+QAnimationDriver::QAnimationDriver(QAnimationDriverPrivate &dd, QObject *parent)
+    : QObject(dd, parent)
+{
+}
+
+
+/*!
+    Advances the animation based on the current time. This function should
+    be continuously called by the driver while the animation is running.
+
+    \internal
+ */
+void QAnimationDriver::advance()
+{
+    QUnifiedTimer *instance = QUnifiedTimer::instance();
+
+    // update current time on all top level animations
+    instance->updateAnimationsTime();
+    instance->restartAnimationTimer();
+}
+
+
+/*!
+    Installs this animation driver. The animation driver is thread local and
+    will only apply for the thread its installed in.
+
+    \internal
+ */
+void QAnimationDriver::install()
+{
+    QUnifiedTimer *timer = QUnifiedTimer::instance(true);
+    timer->installAnimationDriver(this);
+}
+
+bool QAnimationDriver::isRunning() const
+{
+    return d_func()->running;
+}
+
+
+void QAnimationDriver::start()
+{
+    Q_D(QAnimationDriver);
+    if (!d->running) {
+        started();
+        d->running = true;
+    }
+}
+
+
+void QAnimationDriver::stop()
+{
+    Q_D(QAnimationDriver);
+    if (d->running) {
+        stopped();
+        d->running = false;
+    }
+}
+
+/*!
+    \fn QAnimationDriver::started()
+
+    This function is called by the animation framework to notify the driver
+    that it should start running.
+
+    \internal
+ */
+
+/*!
+    \fn QAnimationDriver::stopped()
+
+    This function is called by the animation framework to notify the driver
+    that it should stop running.
+
+    \internal
+ */
+
+/*!
+   The default animation driver just spins the timer...
+ */
+QDefaultAnimationDriver::QDefaultAnimationDriver(QUnifiedTimer *timer)
+    : QAnimationDriver(0), m_unified_timer(timer)
+{
+}
+
+void QDefaultAnimationDriver::timerEvent(QTimerEvent *e)
+{
+    Q_ASSERT(e->timerId() == m_timer.timerId());
+    Q_UNUSED(e); // if the assertions are disabled
+    advance();
+}
+
+void QDefaultAnimationDriver::started()
+{
+    m_timer.start(m_unified_timer->timingInterval, this);
+}
+
+void QDefaultAnimationDriver::stopped()
+{
+    m_timer.stop();
+}
+
+
+
+void QAbstractAnimationPrivate::setState(QAbstractAnimation::State newState)
+{
+    Q_Q(QAbstractAnimation);
+    if (state == newState)
+        return;
+
+    if (loopCount == 0)
+        return;
+
+    QAbstractAnimation::State oldState = state;
+    int oldCurrentTime = currentTime;
+    int oldCurrentLoop = currentLoop;
+    QAbstractAnimation::Direction oldDirection = direction;
+
+    // check if we should Rewind
+    if ((newState == QAbstractAnimation::Paused || newState == QAbstractAnimation::Running)
+        && oldState == QAbstractAnimation::Stopped) {
+            //here we reset the time if needed
+            //we don't call setCurrentTime because this might change the way the animation
+            //behaves: changing the state or changing the current value
+            totalCurrentTime = currentTime = (direction == QAbstractAnimation::Forward) ?
+                0 : (loopCount == -1 ? q->duration() : q->totalDuration());
+    }
+
+    state = newState;
+    QWeakPointer<QAbstractAnimation> guard(q);
+
+    //(un)registration of the animation must always happen before calls to
+    //virtual function (updateState) to ensure a correct state of the timer
+    bool isTopLevel = !group || group->state() == QAbstractAnimation::Stopped;
+    if (oldState == QAbstractAnimation::Running) {
+        if (newState == QAbstractAnimation::Paused && hasRegisteredTimer)
+            QUnifiedTimer::ensureTimerUpdate();
+        //the animation, is not running any more
+        QUnifiedTimer::unregisterAnimation(q);
+    } else if (newState == QAbstractAnimation::Running) {
+        QUnifiedTimer::registerAnimation(q, isTopLevel);
+    }
+
+    q->updateState(newState, oldState);
+    if (!guard || newState != state) //this is to be safe if updateState changes the state
+        return;
+
+    // Notify state change
+    emit q->stateChanged(newState, oldState);
+    if (!guard || newState != state) //this is to be safe if updateState changes the state
+        return;
+
+    switch (state) {
+    case QAbstractAnimation::Paused:
+        break;
+    case QAbstractAnimation::Running:
+        {
+
+            // this ensures that the value is updated now that the animation is running
+            if (oldState == QAbstractAnimation::Stopped) {
+                if (isTopLevel) {
+                    // currentTime needs to be updated if pauseTimer is active
+                    QUnifiedTimer::ensureTimerUpdate();
+                    q->setCurrentTime(totalCurrentTime);
+                }
+            }
+        }
+        break;
+    case QAbstractAnimation::Stopped:
+        // Leave running state.
+        int dura = q->duration();
+
+        if (deleteWhenStopped)
+            q->deleteLater();
+
+        if (dura == -1 || loopCount < 0
+            || (oldDirection == QAbstractAnimation::Forward && (oldCurrentTime * (oldCurrentLoop + 1)) == (dura * loopCount))
+            || (oldDirection == QAbstractAnimation::Backward && oldCurrentTime == 0)) {
+                emit q->finished();
+        }
+        break;
+    }
+}
+
+/*!
+    Constructs the QAbstractAnimation base class, and passes \a parent to
+    QObject's constructor.
+
+    \sa QVariantAnimation, QAnimationGroup
+*/
+QAbstractAnimation::QAbstractAnimation(QObject *parent)
+    : QObject(*new QAbstractAnimationPrivate, 0)
+{
+    // Allow auto-add on reparent
+    setParent(parent);
+}
+
+/*!
+    \internal
+*/
+QAbstractAnimation::QAbstractAnimation(QAbstractAnimationPrivate &dd, QObject *parent)
+    : QObject(dd, 0)
+{
+    // Allow auto-add on reparent
+   setParent(parent);
+}
+
+/*!
+    Stops the animation if it's running, then destroys the
+    QAbstractAnimation. If the animation is part of a QAnimationGroup, it is
+    automatically removed before it's destroyed.
+*/
+QAbstractAnimation::~QAbstractAnimation()
+{
+    Q_D(QAbstractAnimation);
+    //we can't call stop here. Otherwise we get pure virtual calls
+    if (d->state != Stopped) {
+        QAbstractAnimation::State oldState = d->state;
+        d->state = Stopped;
+        emit stateChanged(oldState, d->state);
+        if (oldState == QAbstractAnimation::Running)
+            QUnifiedTimer::unregisterAnimation(this);
+    }
+}
+
+/*!
+    \property QAbstractAnimation::state
+    \brief state of the animation.
+
+    This property describes the current state of the animation. When the
+    animation state changes, QAbstractAnimation emits the stateChanged()
+    signal.
+*/
+QAbstractAnimation::State QAbstractAnimation::state() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->state;
+}
+
+/*!
+    If this animation is part of a QAnimationGroup, this function returns a
+    pointer to the group; otherwise, it returns 0.
+
+    \sa QAnimationGroup::addAnimation()
+*/
+QAnimationGroup *QAbstractAnimation::group() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->group;
+}
+
+/*!
+    \enum QAbstractAnimation::State
+
+    This enum describes the state of the animation.
+
+    \value Stopped The animation is not running. This is the initial state
+    of QAbstractAnimation, and the state QAbstractAnimation reenters when finished. The current
+    time remain unchanged until either setCurrentTime() is
+    called, or the animation is started by calling start().
+
+    \value Paused The animation is paused (i.e., temporarily
+    suspended). Calling resume() will resume animation activity.
+
+    \value Running The animation is running. While control is in the event
+    loop, QAbstractAnimation will update its current time at regular intervals,
+    calling updateCurrentTime() when appropriate.
+
+    \sa state(), stateChanged()
+*/
+
+/*!
+    \enum QAbstractAnimation::Direction
+
+    This enum describes the direction of the animation when in \l Running state.
+
+    \value Forward The current time of the animation increases with time (i.e.,
+    moves from 0 and towards the end / duration).
+
+    \value Backward The current time of the animation decreases with time (i.e.,
+    moves from the end / duration and towards 0).
+
+    \sa direction
+*/
+
+/*!
+    \property QAbstractAnimation::direction
+    \brief the direction of the animation when it is in \l Running
+    state.
+
+    This direction indicates whether the time moves from 0 towards the
+    animation duration, or from the value of the duration and towards 0 after
+    start() has been called.
+
+    By default, this property is set to \l Forward.
+*/
+QAbstractAnimation::Direction QAbstractAnimation::direction() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->direction;
+}
+void QAbstractAnimation::setDirection(Direction direction)
+{
+    Q_D(QAbstractAnimation);
+    if (d->direction == direction)
+        return;
+
+    if (state() == Stopped) {
+        if (direction == Backward) {
+            d->currentTime = duration();
+            d->currentLoop = d->loopCount - 1;
+        } else {
+            d->currentTime = 0;
+            d->currentLoop = 0;
+        }
+    }
+
+    // the commands order below is important: first we need to setCurrentTime with the old direction,
+    // then update the direction on this and all children and finally restart the pauseTimer if needed
+    if (d->hasRegisteredTimer)
+        QUnifiedTimer::ensureTimerUpdate();
+
+    d->direction = direction;
+    updateDirection(direction);
+
+    if (d->hasRegisteredTimer)
+        // needed to update the timer interval in case of a pause animation
+        QUnifiedTimer::updateAnimationTimer();
+
+    emit directionChanged(direction);
+}
+
+/*!
+    \property QAbstractAnimation::duration
+    \brief the duration of the animation.
+
+    If the duration is -1, it means that the duration is undefined.
+    In this case, loopCount is ignored.
+*/
+
+/*!
+    \property QAbstractAnimation::loopCount
+    \brief the loop count of the animation
+
+    This property describes the loop count of the animation as an integer.
+    By default this value is 1, indicating that the animation
+    should run once only, and then stop. By changing it you can let the
+    animation loop several times. With a value of 0, the animation will not
+    run at all, and with a value of -1, the animation will loop forever
+    until stopped.
+    It is not supported to have loop on an animation that has an undefined
+    duration. It will only run once.
+*/
+int QAbstractAnimation::loopCount() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->loopCount;
+}
+void QAbstractAnimation::setLoopCount(int loopCount)
+{
+    Q_D(QAbstractAnimation);
+    d->loopCount = loopCount;
+}
+
+/*!
+    \property QAbstractAnimation::currentLoop
+    \brief the current loop of the animation
+
+    This property describes the current loop of the animation. By default,
+    the animation's loop count is 1, and so the current loop will
+    always be 0. If the loop count is 2 and the animation runs past its
+    duration, it will automatically rewind and restart at current time 0, and
+    current loop 1, and so on.
+
+    When the current loop changes, QAbstractAnimation emits the
+    currentLoopChanged() signal.
+*/
+int QAbstractAnimation::currentLoop() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->currentLoop;
+}
+
+/*!
+    \fn virtual int QAbstractAnimation::duration() const = 0
+
+    This pure virtual function returns the duration of the animation, and
+    defines for how long QAbstractAnimation should update the current
+    time. This duration is local, and does not include the loop count.
+
+    A return value of -1 indicates that the animation has no defined duration;
+    the animation should run forever until stopped. This is useful for
+    animations that are not time driven, or where you cannot easily predict
+    its duration (e.g., event driven audio playback in a game).
+
+    If the animation is a parallel QAnimationGroup, the duration will be the longest
+    duration of all its animations. If the animation is a sequential QAnimationGroup,
+    the duration will be the sum of the duration of all its animations.
+    \sa loopCount
+*/
+
+/*!
+    Returns the total and effective duration of the animation, including the
+    loop count.
+
+    \sa duration(), currentTime
+*/
+int QAbstractAnimation::totalDuration() const
+{
+    int dura = duration();
+    if (dura <= 0)
+        return dura;
+    int loopcount = loopCount();
+    if (loopcount < 0)
+        return -1;
+    return dura * loopcount;
+}
+
+/*!
+    Returns the current time inside the current loop. It can go from 0 to duration().
+
+    \sa duration(), currentTime
+*/
+
+int QAbstractAnimation::currentLoopTime() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->currentTime;
+}
+
+/*!
+    \property QAbstractAnimation::currentTime
+    \brief the current time and progress of the animation
+
+    This property describes the animation's current time. You can change the
+    current time by calling setCurrentTime, or you can call start() and let
+    the animation run, setting the current time automatically as the animation
+    progresses.
+
+    The animation's current time starts at 0, and ends at totalDuration().
+
+    \sa loopCount, currentLoopTime()
+ */
+int QAbstractAnimation::currentTime() const
+{
+    Q_D(const QAbstractAnimation);
+    return d->totalCurrentTime;
+}
+void QAbstractAnimation::setCurrentTime(int msecs)
+{
+    Q_D(QAbstractAnimation);
+    msecs = qMax(msecs, 0);
+
+    // Calculate new time and loop.
+    int dura = duration();
+    int totalDura = dura <= 0 ? dura : ((d->loopCount < 0) ? -1 : dura * d->loopCount);
+    if (totalDura != -1)
+        msecs = qMin(totalDura, msecs);
+    d->totalCurrentTime = msecs;
+
+    // Update new values.
+    int oldLoop = d->currentLoop;
+    d->currentLoop = ((dura <= 0) ? 0 : (msecs / dura));
+    if (d->currentLoop == d->loopCount) {
+        //we're at the end
+        d->currentTime = qMax(0, dura);
+        d->currentLoop = qMax(0, d->loopCount - 1);
+    } else {
+        if (d->direction == Forward) {
+            d->currentTime = (dura <= 0) ? msecs : (msecs % dura);
+        } else {
+            d->currentTime = (dura <= 0) ? msecs : ((msecs - 1) % dura) + 1;
+            if (d->currentTime == dura)
+                --d->currentLoop;
+        }
+    }
+
+    updateCurrentTime(d->currentTime);
+    if (d->currentLoop != oldLoop)
+        emit currentLoopChanged(d->currentLoop);
+
+    // All animations are responsible for stopping the animation when their
+    // own end state is reached; in this case the animation is time driven,
+    // and has reached the end.
+    if ((d->direction == Forward && d->totalCurrentTime == totalDura)
+        || (d->direction == Backward && d->totalCurrentTime == 0)) {
+        stop();
+    }
+}
+
+/*!
+    Starts the animation. The \a policy argument says whether or not the
+    animation should be deleted when it's done. When the animation starts, the
+    stateChanged() signal is emitted, and state() returns Running. When control
+    reaches the event loop, the animation will run by itself, periodically
+    calling updateCurrentTime() as the animation progresses.
+
+    If the animation is currently stopped or has already reached the end,
+    calling start() will rewind the animation and start again from the beginning.
+    When the animation reaches the end, the animation will either stop, or
+    if the loop level is more than 1, it will rewind and continue from the beginning.
+
+    If the animation is already running, this function does nothing.
+
+    \sa stop(), state()
+*/
+void QAbstractAnimation::start(DeletionPolicy policy)
+{
+    Q_D(QAbstractAnimation);
+    if (d->state == Running)
+        return;
+    d->deleteWhenStopped = policy;
+    d->setState(Running);
+}
+
+/*!
+    Stops the animation. When the animation is stopped, it emits the stateChanged()
+    signal, and state() returns Stopped. The current time is not changed.
+
+    If the animation stops by itself after reaching the end (i.e.,
+    currentLoopTime() == duration() and currentLoop() > loopCount() - 1), the
+    finished() signal is emitted.
+
+    \sa start(), state()
+ */
+void QAbstractAnimation::stop()
+{
+    Q_D(QAbstractAnimation);
+
+    if (d->state == Stopped)
+        return;
+
+    d->setState(Stopped);
+}
+
+/*!
+    Pauses the animation. When the animation is paused, state() returns Paused.
+    The value of currentTime will remain unchanged until resume() or start()
+    is called. If you want to continue from the current time, call resume().
+
+    \sa start(), state(), resume()
+ */
+void QAbstractAnimation::pause()
+{
+    Q_D(QAbstractAnimation);
+    if (d->state == Stopped) {
+        qWarning("QAbstractAnimation::pause: Cannot pause a stopped animation");
+        return;
+    }
+
+    d->setState(Paused);
+}
+
+/*!
+    Resumes the animation after it was paused. When the animation is resumed,
+    it emits the resumed() and stateChanged() signals. The currenttime is not
+    changed.
+
+    \sa start(), pause(), state()
+ */
+void QAbstractAnimation::resume()
+{
+    Q_D(QAbstractAnimation);
+    if (d->state != Paused) {
+        qWarning("QAbstractAnimation::resume: "
+                 "Cannot resume an animation that is not paused");
+        return;
+    }
+
+    d->setState(Running);
+}
+
+/*!
+    If \a paused is true, the animation is paused.
+    If \a paused is false, the animation is resumed.
+
+    \sa state(), pause(), resume()
+*/
+void QAbstractAnimation::setPaused(bool paused)
+{
+    if (paused)
+        pause();
+    else
+        resume();
+}
+
+
+/*!
+    \reimp
+*/
+bool QAbstractAnimation::event(QEvent *event)
+{
+    return QObject::event(event);
+}
+
+/*!
+    \fn virtual void QAbstractAnimation::updateCurrentTime(int currentTime) = 0;
+
+    This pure virtual function is called every time the animation's
+    \a currentTime changes.
+
+    \sa updateState()
+*/
+
+/*!
+    This virtual function is called by QAbstractAnimation when the state
+    of the animation is changed from \a oldState to \a newState.
+
+    \sa start(), stop(), pause(), resume()
+*/
+void QAbstractAnimation::updateState(QAbstractAnimation::State newState,
+                                     QAbstractAnimation::State oldState)
+{
+    Q_UNUSED(oldState);
+    Q_UNUSED(newState);
+}
+
+/*!
+    This virtual function is called by QAbstractAnimation when the direction
+    of the animation is changed. The \a direction argument is the new direction.
+
+    \sa setDirection(), direction()
+*/
+void QAbstractAnimation::updateDirection(QAbstractAnimation::Direction direction)
+{
+    Q_UNUSED(direction);
+}
+
+
+QT_END_NAMESPACE
+
+#include "moc_qabstractanimation.cpp"
+
+#endif //QT_NO_ANIMATION