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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\class QParallelAnimationGroup
\brief The QParallelAnimationGroup class provides a parallel group of animations.
\since 4.5
\ingroup group_animation
\preliminary
The animations are all started at the same time, and run in parallel. The animation group
finishes when the longest lasting animation has finished.
*/
#ifndef QT_NO_ANIMATION
#include "qparallelanimationgroup.h"
#include "qparallelanimationgroup_p.h"
//#define QANIMATION_DEBUG
QT_BEGIN_NAMESPACE
/*!
Constructs a QParallelAnimationGroup.
\a parent is passed to QObject's constructor.
*/
QParallelAnimationGroup::QParallelAnimationGroup(QObject *parent)
: QAnimationGroup(*new QParallelAnimationGroupPrivate, parent)
{
}
/*!
\internal
*/
QParallelAnimationGroup::QParallelAnimationGroup(QParallelAnimationGroupPrivate &dd,
QObject *parent)
: QAnimationGroup(dd, parent)
{
}
/*!
Destroys the animation group. It will also destroy all its animations.
*/
QParallelAnimationGroup::~QParallelAnimationGroup()
{
}
/*!
\reimp
*/
int QParallelAnimationGroup::duration() const
{
Q_D(const QParallelAnimationGroup);
int ret = 0;
for (int i = 0; i < d->animations.size(); ++i) {
QAbstractAnimation *animation = d->animations.at(i);
const int currentDuration = animation->totalDuration();
if (currentDuration == -1)
return -1; // Undetermined length
ret = qMax(ret, currentDuration);
}
return ret;
}
/*!
\reimp
*/
void QParallelAnimationGroup::updateCurrentTime(int)
{
Q_D(QParallelAnimationGroup);
if (d->animations.isEmpty())
return;
if (d->currentLoop > d->lastLoop) {
// simulate completion of the loop
int dura = duration();
if (dura > 0) {
foreach (QAbstractAnimation *animation, d->animations) {
animation->setCurrentTime(dura); // will stop
}
}
} else if (d->currentLoop < d->lastLoop) {
// simulate completion of the loop seeking backwards
foreach (QAbstractAnimation *animation, d->animations) {
animation->setCurrentTime(0);
animation->stop();
}
}
bool timeFwd = ((d->currentLoop == d->lastLoop && d->currentTime >= d->lastCurrentTime)
|| d->currentLoop > d->lastLoop);
#ifdef QANIMATION_DEBUG
qDebug("QParallellAnimationGroup %5d: setCurrentTime(%d), loop:%d, last:%d, timeFwd:%d, lastcurrent:%d, %d",
__LINE__, d->currentTime, d->currentLoop, d->lastLoop, timeFwd, d->lastCurrentTime, state());
#endif
// finally move into the actual time of the current loop
foreach (QAbstractAnimation *animation, d->animations) {
const int dura = animation->totalDuration();
if (dura == -1 && d->isUncontrolledAnimationFinished(animation))
continue;
if (dura == -1 || (d->currentTime <= dura && dura != 0)
|| (dura == 0 && d->currentLoop != d->lastLoop)) {
switch (state()) {
case Running:
animation->start();
break;
case Paused:
animation->pause();
break;
case Stopped:
default:
break;
}
}
if (dura <= 0) {
if (dura == -1)
animation->setCurrentTime(d->currentTime);
continue;
}
if ((timeFwd && d->lastCurrentTime <= dura)
|| (!timeFwd && d->currentTime <= dura))
animation->setCurrentTime(d->currentTime);
if (d->currentTime > dura)
animation->stop();
}
d->lastLoop = d->currentLoop;
d->lastCurrentTime = d->currentTime;
}
/*!
\reimp
*/
void QParallelAnimationGroup::updateState(QAbstractAnimation::State oldState,
QAbstractAnimation::State newState)
{
Q_D(QParallelAnimationGroup);
QAnimationGroup::updateState(oldState, newState);
switch (newState) {
case Stopped:
foreach (QAbstractAnimation *animation, d->animations)
animation->stop();
d->disconnectUncontrolledAnimations();
break;
case Paused:
foreach (QAbstractAnimation *animation, d->animations)
animation->pause();
break;
case Running:
d->connectUncontrolledAnimations();
foreach (QAbstractAnimation *animation, d->animations) {
animation->stop();
animation->setDirection(d->direction);
animation->start();
}
break;
}
}
void QParallelAnimationGroupPrivate::_q_uncontrolledAnimationFinished()
{
Q_Q(QParallelAnimationGroup);
QAbstractAnimation *animation = qobject_cast<QAbstractAnimation *>(q->sender());
Q_ASSERT(animation);
int uncontrolledRunningCount = 0;
if (animation->duration() == -1 || animation->loopCount() < 0) {
QHash<QAbstractAnimation *, int>::iterator it = uncontrolledFinishTime.begin();
while (it != uncontrolledFinishTime.end()) {
if (it.key() == animation) {
*it = animation->currentTime();
}
if (it.value() == -1)
++uncontrolledRunningCount;
++it;
}
}
if (uncontrolledRunningCount > 0)
return;
int maxDuration = 0;
foreach (QAbstractAnimation *a, animations)
maxDuration = qMax(maxDuration, a->totalDuration());
if (currentTime >= maxDuration)
q->stop();
}
void QParallelAnimationGroupPrivate::disconnectUncontrolledAnimations()
{
Q_Q(QParallelAnimationGroup);
QHash<QAbstractAnimation *, int>::iterator it = uncontrolledFinishTime.begin();
while (it != uncontrolledFinishTime.end()) {
QObject::disconnect(it.key(), SIGNAL(finished()), q, SLOT(_q_uncontrolledAnimationFinished()));
++it;
}
uncontrolledFinishTime.clear();
}
void QParallelAnimationGroupPrivate::connectUncontrolledAnimations()
{
Q_Q(QParallelAnimationGroup);
foreach (QAbstractAnimation *animation, animations) {
if (animation->duration() == -1 || animation->loopCount() < 0) {
uncontrolledFinishTime[animation] = -1;
QObject::connect(animation, SIGNAL(finished()), q, SLOT(_q_uncontrolledAnimationFinished()));
}
}
}
bool QParallelAnimationGroupPrivate::isUncontrolledAnimationFinished(QAbstractAnimation *anim) const
{
return uncontrolledFinishTime.value(anim, -1) >= 0;
}
/*!
\reimp
*/
void QParallelAnimationGroup::updateDirection(QAbstractAnimation::Direction direction)
{
Q_D(QParallelAnimationGroup);
//we need to update the direction of the current animation
if (state() != Stopped) {
foreach(QAbstractAnimation *anim, d->animations) {
anim->setDirection(direction);
}
} else {
if (direction == Forward) {
d->lastLoop = 0;
d->lastCurrentTime = 0;
} else {
// Looping backwards with loopCount == -1 does not really work well...
d->lastLoop = (d->loopCount == -1 ? 0 : d->loopCount - 1);
d->lastCurrentTime = duration();
}
}
}
/*!
\reimp
*/
bool QParallelAnimationGroup::event(QEvent *event)
{
return QAnimationGroup::event(event);
}
QT_END_NAMESPACE
#include "moc_qparallelanimationgroup.cpp"
#endif //QT_NO_ANIMATION
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