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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 QPropertyAnimation
\brief The QPropertyAnimation class animates properties for QObject(and QWidget)
\ingroup animation
\preliminary
This class is part of {The Animation Framework}. You can use QPropertyAnimation
by itself as a simple animation class, or as part of more complex
animations through QAnimationGroup.
The most common way to use QPropertyAnimation is to construct an instance
of it by passing a pointer to a QObject or a QWidget, and the name of the
property you would like to animate to QPropertyAnimation's constructor.
The start value of the animation is optional. If you do not set any start
value, the animation will operate on the target's current property value
at the point when the animation was started. You can call setStartValue()
to set the start value, and setEndValue() to set the target value for
the animated property.
Animations can operate on QObjects and QWidgets. You can choose to assign a
target object by either calling setTargetObject() or by passing a QObject
pointer to QPropertyAnimation's constructor.
\sa QVariantAnimation, QAnimationGroup, {The Animation Framework}
*/
#ifndef QT_NO_ANIMATION
#include "qpropertyanimation.h"
#include "qanimationgroup.h"
#include <QtCore/qdebug.h>
#include "qpropertyanimation_p.h"
#include <QtCore/qmath.h>
#include <QtCore/qmutex.h>
QT_BEGIN_NAMESPACE
typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
Q_GLOBAL_STATIC(QPropertyAnimationHash, _q_runningAnimations);
Q_GLOBAL_STATIC_WITH_ARGS(QMutex, guardHashLock, (QMutex::Recursive) )
void QPropertyAnimationPrivate::updateMetaProperty()
{
if (!target || propertyName.isEmpty())
return;
if (hasMetaProperty == 0 && !property.isValid()) {
const QMetaObject *mo = target->metaObject();
propertyIndex = mo->indexOfProperty(propertyName);
if (propertyIndex != -1) {
hasMetaProperty = 1;
property = mo->property(propertyIndex);
propertyType = property.userType();
} else {
hasMetaProperty = 2;
}
}
if (property.isValid())
convertValues(propertyType);
}
void QPropertyAnimationPrivate::updateProperty(const QVariant &newValue)
{
if (!target || state == QAbstractAnimation::Stopped)
return;
if (hasMetaProperty == 1) {
if (newValue.userType() == propertyType) {
//no conversion is needed, we directly call the QObject::qt_metacall
void *data = const_cast<void*>(newValue.constData());
target->qt_metacall(QMetaObject::WriteProperty, propertyIndex, &data);
} else {
property.write(target, newValue);
}
} else {
target->setProperty(propertyName.constData(), newValue);
}
}
/*!
Construct a QPropertyAnimation object. \a parent is passed to QObject's
constructor.
*/
QPropertyAnimation::QPropertyAnimation(QObject *parent)
: QVariantAnimation(*new QPropertyAnimationPrivate, parent)
{
}
/*!
Construct a QPropertyAnimation object. \a parent is passed to QObject's
constructor. The animation changes the property \a propertyName on \a
target. The default duration is 250ms.
\sa targetObject, propertyName
*/
QPropertyAnimation::QPropertyAnimation(QObject *target, const QByteArray &propertyName, QObject *parent)
: QVariantAnimation(*new QPropertyAnimationPrivate, parent)
{
setTargetObject(target);
setPropertyName(propertyName);
}
/*!
Destroys the QPropertyAnimation instance.
*/
QPropertyAnimation::~QPropertyAnimation()
{
stop();
}
/*!
\property QPropertyAnimation::targetObject
\brief the target QObject for this animation.
This property defines the target QObject for this animation.
*/
QObject *QPropertyAnimation::targetObject() const
{
Q_D(const QPropertyAnimation);
return d->target;
}
void QPropertyAnimation::setTargetObject(QObject *target)
{
Q_D(QPropertyAnimation);
if (d->target == target)
return;
d->target = target;
d->hasMetaProperty = 0;
d->updateMetaProperty();
}
/*!
\property QPropertyAnimation::propertyName
\brief the target property name for this animation
This property defines the target property name for this animation. The
property name is required for the animation to operate.
*/
QByteArray QPropertyAnimation::propertyName() const
{
Q_D(const QPropertyAnimation);
return d->propertyName;
}
void QPropertyAnimation::setPropertyName(const QByteArray &propertyName)
{
Q_D(QPropertyAnimation);
d->propertyName = propertyName;
d->hasMetaProperty = 0;
d->updateMetaProperty();
}
/*!
\reimp
*/
bool QPropertyAnimation::event(QEvent *event)
{
return QVariantAnimation::event(event);
}
/*!
This virtual function is called by QVariantAnimation whenever the current value
changes. \a value is the new, updated value. It updates the current value
of the property on the target object.
\sa currentValue, currentTime
*/
void QPropertyAnimation::updateCurrentValue(const QVariant &value)
{
Q_D(QPropertyAnimation);
d->updateProperty(value);
}
/*!
\reimp
*/
void QPropertyAnimation::updateState(QAbstractAnimation::State oldState,
QAbstractAnimation::State newState)
{
Q_D(QPropertyAnimation);
QVariantAnimation::updateState(oldState, newState);
QMutexLocker locker(guardHashLock());
QPropertyAnimationHash * hash = _q_runningAnimations();
QPropertyAnimationPair key(d->target, d->propertyName);
if (newState == Running) {
d->updateMetaProperty();
QPropertyAnimation *oldAnim = hash->value(key, 0);
if (oldAnim) {
//we try to stop the top level group
QAbstractAnimation *current = oldAnim;
while(current->group() && current->state() != Stopped) current = current->group();
current->stop();
}
hash->insert(key, this);
// Initialize start value
if (d->target && !d->defaultStartValue.isValid() && (d->atBeginning() || d->atEnd())) {
d->setDefaultStartValue(d->target->property(d->propertyName.constData()));
}
} else if (hash->value(key) == this) {
hash->remove(key);
}
}
#include "moc_qpropertyanimation.cpp"
QT_END_NAMESPACE
#endif //QT_NO_ANIMATION
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