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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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/*!
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\class QParallelAnimationGroup
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\brief The QParallelAnimationGroup class provides a parallel group of animations.
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\since 4.6
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\ingroup animation
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QParallelAnimationGroup--a \l{QAnimationGroup}{container for
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animations}--starts all its animations when it is
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\l{QAbstractAnimation::start()}{started} itself, i.e., runs all
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animations in parallel. The animation group finishes when the
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longest lasting animation has finished.
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You can treat QParallelAnimation as any other QAbstractAnimation,
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e.g., pause, resume, or add it to other animation groups.
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\code
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QParallelAnimationGroup *group = new QParallelAnimationGroup;
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group->addAnimation(anim1);
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group->addAnimation(anim2);
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group->start();
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\endcode
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In this example, \c anim1 and \c anim2 are two
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\l{QPropertyAnimation}s that have already been set up.
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\sa QAnimationGroup, QPropertyAnimation, {The Animation Framework}
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*/
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#include "qparallelanimationgroup.h"
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#include "qparallelanimationgroup_p.h"
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//#define QANIMATION_DEBUG
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#ifndef QT_NO_ANIMATION
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QT_BEGIN_NAMESPACE
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/*!
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Constructs a QParallelAnimationGroup.
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\a parent is passed to QObject's constructor.
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*/
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QParallelAnimationGroup::QParallelAnimationGroup(QObject *parent)
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: QAnimationGroup(*new QParallelAnimationGroupPrivate, parent)
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{
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}
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/*!
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\internal
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*/
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QParallelAnimationGroup::QParallelAnimationGroup(QParallelAnimationGroupPrivate &dd,
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QObject *parent)
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: QAnimationGroup(dd, parent)
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{
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}
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/*!
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Destroys the animation group. It will also destroy all its animations.
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*/
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QParallelAnimationGroup::~QParallelAnimationGroup()
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{
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}
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/*!
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\reimp
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*/
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int QParallelAnimationGroup::duration() const
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{
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Q_D(const QParallelAnimationGroup);
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int ret = 0;
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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const int currentDuration = animation->totalDuration();
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if (currentDuration == -1)
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return -1; // Undetermined length
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ret = qMax(ret, currentDuration);
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}
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return ret;
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}
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/*!
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\reimp
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*/
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void QParallelAnimationGroup::updateCurrentTime(int currentTime)
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{
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Q_D(QParallelAnimationGroup);
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if (d->animations.isEmpty())
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return;
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if (d->currentLoop > d->lastLoop) {
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// simulate completion of the loop
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int dura = duration();
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if (dura > 0) {
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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if (animation->state() != QAbstractAnimation::Stopped)
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d->animations.at(i)->setCurrentTime(dura); // will stop
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}
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}
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} else if (d->currentLoop < d->lastLoop) {
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// simulate completion of the loop seeking backwards
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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//we need to make sure the animation is in the right state
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//and then rewind it
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d->applyGroupState(animation);
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animation->setCurrentTime(0);
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animation->stop();
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}
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}
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#ifdef QANIMATION_DEBUG
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qDebug("QParallellAnimationGroup %5d: setCurrentTime(%d), loop:%d, last:%d, timeFwd:%d, lastcurrent:%d, %d",
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__LINE__, d->currentTime, d->currentLoop, d->lastLoop, timeFwd, d->lastCurrentTime, state());
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#endif
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// finally move into the actual time of the current loop
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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const int dura = animation->totalDuration();
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//if the loopcount is bigger we should always start all animations
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if (d->currentLoop > d->lastLoop
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//if we're at the end of the animation, we need to start it if it wasn't already started in this loop
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//this happens in Backward direction where not all animations are started at the same time
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|| d->shouldAnimationStart(animation, d->lastCurrentTime > dura /*startIfAtEnd*/)) {
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d->applyGroupState(animation);
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}
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if (animation->state() == state()) {
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animation->setCurrentTime(currentTime);
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if (dura > 0 && currentTime > dura)
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animation->stop();
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}
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}
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d->lastLoop = d->currentLoop;
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d->lastCurrentTime = currentTime;
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}
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/*!
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\reimp
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*/
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void QParallelAnimationGroup::updateState(QAbstractAnimation::State oldState,
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QAbstractAnimation::State newState)
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{
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Q_D(QParallelAnimationGroup);
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QAnimationGroup::updateState(oldState, newState);
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switch (newState) {
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case Stopped:
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for (int i = 0; i < d->animations.size(); ++i)
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d->animations.at(i)->stop();
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d->disconnectUncontrolledAnimations();
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break;
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case Paused:
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for (int i = 0; i < d->animations.size(); ++i)
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if (d->animations.at(i)->state() == Running)
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d->animations.at(i)->pause();
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break;
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case Running:
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d->connectUncontrolledAnimations();
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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if (oldState == Stopped)
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animation->stop();
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animation->setDirection(d->direction);
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if (d->shouldAnimationStart(animation, oldState == Stopped))
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animation->start();
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}
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break;
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}
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}
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void QParallelAnimationGroupPrivate::_q_uncontrolledAnimationFinished()
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{
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Q_Q(QParallelAnimationGroup);
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QAbstractAnimation *animation = qobject_cast<QAbstractAnimation *>(q->sender());
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Q_ASSERT(animation);
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int uncontrolledRunningCount = 0;
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if (animation->duration() == -1 || animation->loopCount() < 0) {
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QHash<QAbstractAnimation *, int>::iterator it = uncontrolledFinishTime.begin();
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while (it != uncontrolledFinishTime.end()) {
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if (it.key() == animation) {
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*it = animation->currentTime();
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}
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if (it.value() == -1)
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++uncontrolledRunningCount;
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++it;
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}
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}
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if (uncontrolledRunningCount > 0)
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return;
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int maxDuration = 0;
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for (int i = 0; i < animations.size(); ++i)
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maxDuration = qMax(maxDuration, animations.at(i)->totalDuration());
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if (currentTime >= maxDuration)
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q->stop();
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}
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void QParallelAnimationGroupPrivate::disconnectUncontrolledAnimations()
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{
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Q_Q(QParallelAnimationGroup);
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QHash<QAbstractAnimation *, int>::iterator it = uncontrolledFinishTime.begin();
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while (it != uncontrolledFinishTime.end()) {
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QObject::disconnect(it.key(), SIGNAL(finished()), q, SLOT(_q_uncontrolledAnimationFinished()));
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++it;
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}
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uncontrolledFinishTime.clear();
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}
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void QParallelAnimationGroupPrivate::connectUncontrolledAnimations()
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{
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Q_Q(QParallelAnimationGroup);
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for (int i = 0; i < animations.size(); ++i) {
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QAbstractAnimation *animation = animations.at(i);
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if (animation->duration() == -1 || animation->loopCount() < 0) {
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uncontrolledFinishTime[animation] = -1;
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QObject::connect(animation, SIGNAL(finished()), q, SLOT(_q_uncontrolledAnimationFinished()));
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}
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}
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}
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bool QParallelAnimationGroupPrivate::shouldAnimationStart(QAbstractAnimation *animation, bool startIfAtEnd) const
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{
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const int dura = animation->totalDuration();
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if (dura == -1)
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return !isUncontrolledAnimationFinished(animation);
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if (startIfAtEnd)
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return currentTime <= dura;
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if (direction == QAbstractAnimation::Forward)
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return currentTime < dura;
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else //direction == QAbstractAnimation::Backward
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return currentTime && currentTime <= dura;
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}
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void QParallelAnimationGroupPrivate::applyGroupState(QAbstractAnimation *animation)
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{
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switch (state)
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{
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case QAbstractAnimation::Running:
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animation->start();
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break;
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case QAbstractAnimation::Paused:
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animation->pause();
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break;
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case QAbstractAnimation::Stopped:
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default:
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break;
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}
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}
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bool QParallelAnimationGroupPrivate::isUncontrolledAnimationFinished(QAbstractAnimation *anim) const
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{
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return uncontrolledFinishTime.value(anim, -1) >= 0;
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}
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/*!
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\reimp
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*/
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void QParallelAnimationGroup::updateDirection(QAbstractAnimation::Direction direction)
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{
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Q_D(QParallelAnimationGroup);
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//we need to update the direction of the current animation
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if (state() != Stopped) {
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for (int i = 0; i < d->animations.size(); ++i) {
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QAbstractAnimation *animation = d->animations.at(i);
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animation->setDirection(direction);
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}
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} else {
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if (direction == Forward) {
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d->lastLoop = 0;
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d->lastCurrentTime = 0;
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} else {
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// Looping backwards with loopCount == -1 does not really work well...
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d->lastLoop = (d->loopCount == -1 ? 0 : d->loopCount - 1);
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d->lastCurrentTime = duration();
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}
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}
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}
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/*!
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\reimp
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*/
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bool QParallelAnimationGroup::event(QEvent *event)
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{
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return QAnimationGroup::event(event);
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}
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QT_END_NAMESPACE
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#include "moc_qparallelanimationgroup.cpp"
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#endif //QT_NO_ANIMATION
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