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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 QtDeclarative 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.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmlstate.h"
#include "qmlstategroup.h"
#include "qmlstate_p.h"
#include "qmlbindablevalue.h"
#include "qmlstateoperations.h"
#include "qmlanimation.h"
#include "qmlanimation_p.h"
#include <QParallelAnimationGroup>
QT_BEGIN_NAMESPACE
/*!
\qmlclass Transition QmlTransition
\brief The Transition element defines animated transitions that occur on state changes.
\sa {states-transitions}{States and Transitions}
*/
/*!
\internal
\class QmlTransition
\brief The QmlTransition class allows you to define animated transitions that occur on state changes.
\ingroup group_states
*/
//ParallelAnimationWrapperallows us to do a "callback" when the animation finishes, rather than connecting
//and disconnecting signals and slots frequently
class ParallelAnimationWrapper : public QParallelAnimationGroup
{
Q_OBJECT
public:
ParallelAnimationWrapper(QObject *parent) : QParallelAnimationGroup(parent) {}
QmlTransitionPrivate *trans;
protected:
virtual void updateState(QAbstractAnimation::State oldState, QAbstractAnimation::State newState);
};
class QmlTransitionPrivate : public QObjectPrivate
{
Q_DECLARE_PUBLIC(QmlTransition)
public:
QmlTransitionPrivate() : fromState(QLatin1String("*")), toState(QLatin1String("*"))
, reversed(false), reversible(false), group(0), endState(0)
{
operations.parent = this;
}
QString fromState;
QString toState;
bool reversed;
bool reversible;
ParallelAnimationWrapper *group;
QmlState *endState;
void init()
{
Q_Q(QmlTransition);
group = new ParallelAnimationWrapper(q);
group->trans = this;
}
void complete()
{
endState->d_func()->complete();
}
class AnimationList : public QmlConcreteList<QmlAbstractAnimation *>
{
public:
AnimationList() : parent(0) {}
virtual void append(QmlAbstractAnimation *a);
virtual void clear() { QmlConcreteList<QmlAbstractAnimation *>::clear(); } //XXX
QmlTransitionPrivate *parent;
};
AnimationList operations;
};
void QmlTransitionPrivate::AnimationList::append(QmlAbstractAnimation *a)
{
QmlConcreteList<QmlAbstractAnimation *>::append(a);
parent->group->addAnimation(a->qtAnimation());
}
void ParallelAnimationWrapper::updateState(QAbstractAnimation::State oldState, QAbstractAnimation::State newState)
{
QParallelAnimationGroup::updateState(oldState, newState);
//XXX not 100% guaranteed to be at end (if there are many zero duration animations at the end)?
if (newState == Stopped && currentTime() == duration())
{
trans->complete();
}
}
QML_DEFINE_TYPE(QmlTransition,Transition);
QmlTransition::QmlTransition(QObject *parent)
: QObject(*(new QmlTransitionPrivate), parent)
{
Q_D(QmlTransition);
d->init();
}
QmlTransition::~QmlTransition()
{
}
void QmlTransition::stop()
{
Q_D(QmlTransition);
d->group->stop();
}
void QmlTransition::setReversed(bool r)
{
Q_D(QmlTransition);
d->reversed = r;
}
void QmlTransition::prepare(QmlStateOperation::ActionList &actions,
QList<QmlMetaProperty> &after,
QmlState *endState)
{
Q_D(QmlTransition);
if (d->reversed) {
for (int ii = d->operations.count() - 1; ii >= 0; --ii) {
d->operations.at(ii)->transition(actions, after, QmlAbstractAnimation::Backward);
}
} else {
for (int ii = 0; ii < d->operations.count(); ++ii) {
d->operations.at(ii)->transition(actions, after, QmlAbstractAnimation::Forward);
}
}
d->endState = endState;
d->group->start();
}
/*!
\qmlproperty string Transition::fromState
\qmlproperty string Transition::toState
These properties are selectors indicating which state changes should trigger the transition.
fromState is used in conjunction with toState to determine when a transition should
be applied. By default fromState and toState are both "*" (any state). In the following example,
the transition is applied when changing from state1 to state2.
\code
<Transition fromState="state1" toState="state2">
...
</Transition>
\endcode
*/
/*!
\property QmlTransition::fromState
\brief a selector indicating which states, when left, should trigger the transition.
fromState is used in conjunction with toState to determine when a transition should
be applied. The default value is "*" (any state).
*/
QString QmlTransition::fromState() const
{
Q_D(const QmlTransition);
return d->fromState;
}
void QmlTransition::setFromState(const QString &f)
{
Q_D(QmlTransition);
d->fromState = f;
}
/*!
\qmlproperty bool Transition::reversible
This property holds whether the transition should be automatically reversed when the conditions that triggered this transition are reversed.
The default value is false.
*/
/*!
\property QmlTransition::reversible
\brief whether the transition should be automatically reversed when the conditions that triggered this transition are reversed.
The default value is false.
*/
bool QmlTransition::reversible() const
{
Q_D(const QmlTransition);
return d->reversible;
}
void QmlTransition::setReversible(bool r)
{
Q_D(QmlTransition);
d->reversible = r;
}
/*!
\property QmlTransition::toState
\brief a selector indicating which states, when entered, should trigger the transition.
toState is used in conjunction with fromState to determine when a transition should
be applied. The default value is "*" (any state).
*/
QString QmlTransition::toState() const
{
Q_D(const QmlTransition);
return d->toState;
}
void QmlTransition::setToState(const QString &t)
{
Q_D(QmlTransition);
d->toState = t;
}
/*!
\qmlproperty list<Animation> Transition::operations
This property holds a list of the animations to be run for this transition.
The top-level animations in operations are run in parallel.
To run them sequentially, you can create a single <SequentialAnimation>
which contains all the animations, and assign that to operations.
\default
*/
/*!
\property QmlTransition::operations
\brief a list of the transition animations to be run.
*/
QmlList<QmlAbstractAnimation *>* QmlTransition::operations()
{
Q_D(QmlTransition);
return &d->operations;
}
QT_END_NAMESPACE
#include "qmltransition.moc"
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