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Diffstat (limited to 'src/declarative/util/qmltransition.cpp')
-rw-r--r-- | src/declarative/util/qmltransition.cpp | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/src/declarative/util/qmltransition.cpp b/src/declarative/util/qmltransition.cpp new file mode 100644 index 0000000..fb09e32 --- /dev/null +++ b/src/declarative/util/qmltransition.cpp @@ -0,0 +1,283 @@ +/**************************************************************************** +** +** 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 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" |