Mac-4.7.4/src/corelib/animation/qpropertyanimation.cpp - platform/external/qt - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** GNU Lesser General Public License Usage
 ** 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 1.1, 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.
 **
 ** Other Usage
 ** Alternatively, this file may be used in accordance with the terms and
 ** conditions contained in a signed written agreement between you and Nokia.
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 /*!
     \class QPropertyAnimation
     \brief The QPropertyAnimation class animates Qt properties
     \since 4.6

     \ingroup animation

     QPropertyAnimation interpolates over \l{Qt's Property System}{Qt
     properties}. As property values are stored in \l{QVariant}s, the
     class inherits QVariantAnimation, and supports animation of the
     same \l{QVariant::Type}{variant types} as its super class.

     A class declaring properties must be a QObject. To make it
     possible to animate a property, it must provide a setter (so that
     QPropertyAnimation can set the property's value). Note that this
     makes it possible to animate many of Qt's widgets. Let's look at
     an example:

     \code
         QPropertyAnimation *animation = new QPropertyAnimation(myWidget, "geometry");
         animation->setDuration(10000);
         animation->setStartValue(QRect(0, 0, 100, 30));
         animation->setEndValue(QRect(250, 250, 100, 30));

         animation->start();
     \endcode

     The property name and the QObject instance of which property
     should be animated are passed to the constructor. You can then
     specify the start and end value of the property. The procedure is
     equal for properties in classes you have implemented
     yourself--just check with QVariantAnimation that your QVariant
     type is supported.

     The QVariantAnimation class description explains how to set up the
     animation in detail. Note, however, that if a start value is not
     set, the property will start at the value it had when the
     QPropertyAnimation instance was created.

     QPropertyAnimation works like a charm on its own. For complex
     animations that, for instance, contain several objects,
     QAnimationGroup is provided. An animation group is an animation
     that can contain other animations, and that can manage when its
     animations are played. Look at QParallelAnimationGroup for an
     example.

     \sa QVariantAnimation, QAnimationGroup, {The Animation Framework}
 */

 #include "qpropertyanimation.h"
 #include "qanimationgroup.h"
 #include "qpropertyanimation_p.h"

 #include <private/qmutexpool_p.h>

 #ifndef QT_NO_ANIMATION

 QT_BEGIN_NAMESPACE

 void QPropertyAnimationPrivate::updateMetaProperty()
 {
     if (!target || propertyName.isEmpty()) {
         propertyType = QVariant::Invalid;
         propertyIndex = -1;
         return;
     }

     //propertyType will be set to a valid type only if there is a Q_PROPERTY
     //otherwise it will be set to QVariant::Invalid at the end of this function
     propertyType = targetValue->property(propertyName).userType();
     propertyIndex = targetValue->metaObject()->indexOfProperty(propertyName);

     if (propertyType != QVariant::Invalid)
         convertValues(propertyType);
     if (propertyIndex == -1) {
         //there is no Q_PROPERTY on the object
         propertyType = QVariant::Invalid;
         if (!targetValue->dynamicPropertyNames().contains(propertyName))
             qWarning("QPropertyAnimation: you're trying to animate a non-existing property %s of your QObject", propertyName.constData());
     } else if (!targetValue->metaObject()->property(propertyIndex).isWritable()) {
         qWarning("QPropertyAnimation: you're trying to animate the non-writable property %s of your QObject", propertyName.constData());
 	}
 }

 void QPropertyAnimationPrivate::updateProperty(const QVariant &newValue)
 {
     if (state == QAbstractAnimation::Stopped)
         return;

     if (!target) {
         q_func()->stop(); //the target was destroyed we need to stop the animation
         return;
     }

     if (newValue.userType() == propertyType) {
         //no conversion is needed, we directly call the QMetaObject::metacall
         void *data = const_cast<void*>(newValue.constData());
         QMetaObject::metacall(targetValue, QMetaObject::WriteProperty, propertyIndex, &data);
     } else {
         targetValue->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
 {
     return d_func()->target.data();
 }

 void QPropertyAnimation::setTargetObject(QObject *target)
 {
     Q_D(QPropertyAnimation);
     if (d->targetValue == target)
         return;

     if (d->state != QAbstractAnimation::Stopped) {
         qWarning("QPropertyAnimation::setTargetObject: you can't change the target of a running animation");
         return;
     }

     d->target = d->targetValue = target;
     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);
     if (d->state != QAbstractAnimation::Stopped) {
         qWarning("QPropertyAnimation::setPropertyName: you can't change the property name of a running animation");
         return;
     }

     d->propertyName = propertyName;
     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

     If the startValue is not defined when the state of the animation changes from Stopped to Running,
     the current property value is used as the initial value for the animation.
 */
 void QPropertyAnimation::updateState(QAbstractAnimation::State newState,
                                      QAbstractAnimation::State oldState)
 {
     Q_D(QPropertyAnimation);

     if (!d->target && oldState == Stopped) {
         qWarning("QPropertyAnimation::updateState (%s): Changing state of an animation without target",
                  d->propertyName.constData());
         return;
     }

     QVariantAnimation::updateState(newState, oldState);

     QPropertyAnimation *animToStop = 0;
     {
 #ifndef QT_NO_THREAD
         QMutexLocker locker(QMutexPool::globalInstanceGet(&staticMetaObject));
 #endif
         typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
         typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
         static QPropertyAnimationHash hash;
         //here we need to use value because we need to know to which pointer
         //the animation was referring in case stopped because the target was destroyed
         QPropertyAnimationPair key(d->targetValue, d->propertyName);
         if (newState == Running) {
             d->updateMetaProperty();
             animToStop = hash.value(key, 0);
             hash.insert(key, this);
             // update the default start value
             if (oldState == Stopped) {
                 d->setDefaultStartEndValue(d->targetValue->property(d->propertyName.constData()));
                 //let's check if we have a start value and an end value
                 if (!startValue().isValid() && (d->direction == Backward || !d->defaultStartEndValue.isValid())) {
                     qWarning("QPropertyAnimation::updateState (%s, %s, %s): starting an animation without start value",
                              d->propertyName.constData(), d->target.data()->metaObject()->className(),
                              qPrintable(d->target.data()->objectName()));
                 }
                 if (!endValue().isValid() && (d->direction == Forward || !d->defaultStartEndValue.isValid())) {
                     qWarning("QPropertyAnimation::updateState (%s, %s, %s): starting an animation without end value",
                              d->propertyName.constData(), d->target.data()->metaObject()->className(),
                              qPrintable(d->target.data()->objectName()));
                 }
             }
         } else if (hash.value(key) == this) {
             hash.remove(key);
         }
     }

     //we need to do that after the mutex was unlocked
     if (animToStop) {
         // try to stop the top level group
         QAbstractAnimation *current = animToStop;
         while (current->group() && current->state() != Stopped)
             current = current->group();
         current->stop();
     }
 }

 #include "moc_qpropertyanimation.cpp"

 QT_END_NAMESPACE

 #endif //QT_NO_ANIMATION
	/****************************************************************************
	**
	** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
	** All rights reserved.
	** Contact: Nokia Corporation (qt-info@nokia.com)
	**
	** This file is part of the QtCore module of the Qt Toolkit.
	**
	** $QT_BEGIN_LICENSE:LGPL$
	** GNU Lesser General Public License Usage
	** 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 1.1, 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.
	**
	** Other Usage
	** Alternatively, this file may be used in accordance with the terms and
	** conditions contained in a signed written agreement between you and Nokia.
	**
	**
	**
	**
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	/*!
	\class QPropertyAnimation
	\brief The QPropertyAnimation class animates Qt properties
	\since 4.6

	\ingroup animation

	QPropertyAnimation interpolates over \l{Qt's Property System}{Qt
	properties}. As property values are stored in \l{QVariant}s, the
	class inherits QVariantAnimation, and supports animation of the
	same \l{QVariant::Type}{variant types} as its super class.

	A class declaring properties must be a QObject. To make it
	possible to animate a property, it must provide a setter (so that
	QPropertyAnimation can set the property's value). Note that this
	makes it possible to animate many of Qt's widgets. Let's look at
	an example:

	\code
	QPropertyAnimation *animation = new QPropertyAnimation(myWidget, "geometry");
	animation->setDuration(10000);
	animation->setStartValue(QRect(0, 0, 100, 30));
	animation->setEndValue(QRect(250, 250, 100, 30));

	animation->start();
	\endcode

	The property name and the QObject instance of which property
	should be animated are passed to the constructor. You can then
	specify the start and end value of the property. The procedure is
	equal for properties in classes you have implemented
	yourself--just check with QVariantAnimation that your QVariant
	type is supported.

	The QVariantAnimation class description explains how to set up the
	animation in detail. Note, however, that if a start value is not
	set, the property will start at the value it had when the
	QPropertyAnimation instance was created.

	QPropertyAnimation works like a charm on its own. For complex
	animations that, for instance, contain several objects,
	QAnimationGroup is provided. An animation group is an animation
	that can contain other animations, and that can manage when its
	animations are played. Look at QParallelAnimationGroup for an
	example.

	\sa QVariantAnimation, QAnimationGroup, {The Animation Framework}
	*/

	#include "qpropertyanimation.h"
	#include "qanimationgroup.h"
	#include "qpropertyanimation_p.h"

	#include <private/qmutexpool_p.h>

	#ifndef QT_NO_ANIMATION

	QT_BEGIN_NAMESPACE

	void QPropertyAnimationPrivate::updateMetaProperty()
	{
	if (!target \|\| propertyName.isEmpty()) {
	propertyType = QVariant::Invalid;
	propertyIndex = -1;
	return;
	}

	//propertyType will be set to a valid type only if there is a Q_PROPERTY
	//otherwise it will be set to QVariant::Invalid at the end of this function
	propertyType = targetValue->property(propertyName).userType();
	propertyIndex = targetValue->metaObject()->indexOfProperty(propertyName);

	if (propertyType != QVariant::Invalid)
	convertValues(propertyType);
	if (propertyIndex == -1) {
	//there is no Q_PROPERTY on the object
	propertyType = QVariant::Invalid;
	if (!targetValue->dynamicPropertyNames().contains(propertyName))
	qWarning("QPropertyAnimation: you're trying to animate a non-existing property %s of your QObject", propertyName.constData());
	} else if (!targetValue->metaObject()->property(propertyIndex).isWritable()) {
	qWarning("QPropertyAnimation: you're trying to animate the non-writable property %s of your QObject", propertyName.constData());
	}
	}

	void QPropertyAnimationPrivate::updateProperty(const QVariant &newValue)
	{
	if (state == QAbstractAnimation::Stopped)
	return;

	if (!target) {
	q_func()->stop(); //the target was destroyed we need to stop the animation
	return;
	}

	if (newValue.userType() == propertyType) {
	//no conversion is needed, we directly call the QMetaObject::metacall
	void data = const_cast<void>(newValue.constData());
	QMetaObject::metacall(targetValue, QMetaObject::WriteProperty, propertyIndex, &data);
	} else {
	targetValue->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
	{
	return d_func()->target.data();
	}

	void QPropertyAnimation::setTargetObject(QObject *target)
	{
	Q_D(QPropertyAnimation);
	if (d->targetValue == target)
	return;

	if (d->state != QAbstractAnimation::Stopped) {
	qWarning("QPropertyAnimation::setTargetObject: you can't change the target of a running animation");
	return;
	}

	d->target = d->targetValue = target;
	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);
	if (d->state != QAbstractAnimation::Stopped) {
	qWarning("QPropertyAnimation::setPropertyName: you can't change the property name of a running animation");
	return;
	}

	d->propertyName = propertyName;
	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

	If the startValue is not defined when the state of the animation changes from Stopped to Running,
	the current property value is used as the initial value for the animation.
	*/
	void QPropertyAnimation::updateState(QAbstractAnimation::State newState,
	QAbstractAnimation::State oldState)
	{
	Q_D(QPropertyAnimation);

	if (!d->target && oldState == Stopped) {
	qWarning("QPropertyAnimation::updateState (%s): Changing state of an animation without target",
	d->propertyName.constData());
	return;
	}

	QVariantAnimation::updateState(newState, oldState);

	QPropertyAnimation *animToStop = 0;
	{
	#ifndef QT_NO_THREAD
	QMutexLocker locker(QMutexPool::globalInstanceGet(&staticMetaObject));
	#endif
	typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
	typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
	static QPropertyAnimationHash hash;
	//here we need to use value because we need to know to which pointer
	//the animation was referring in case stopped because the target was destroyed
	QPropertyAnimationPair key(d->targetValue, d->propertyName);
	if (newState == Running) {
	d->updateMetaProperty();
	animToStop = hash.value(key, 0);
	hash.insert(key, this);
	// update the default start value
	if (oldState == Stopped) {
	d->setDefaultStartEndValue(d->targetValue->property(d->propertyName.constData()));
	//let's check if we have a start value and an end value
	if (!startValue().isValid() && (d->direction == Backward \|\| !d->defaultStartEndValue.isValid())) {
	qWarning("QPropertyAnimation::updateState (%s, %s, %s): starting an animation without start value",
	d->propertyName.constData(), d->target.data()->metaObject()->className(),
	qPrintable(d->target.data()->objectName()));
	}
	if (!endValue().isValid() && (d->direction == Forward \|\| !d->defaultStartEndValue.isValid())) {
	qWarning("QPropertyAnimation::updateState (%s, %s, %s): starting an animation without end value",
	d->propertyName.constData(), d->target.data()->metaObject()->className(),
	qPrintable(d->target.data()->objectName()));
	}
	}
	} else if (hash.value(key) == this) {
	hash.remove(key);
	}
	}

	//we need to do that after the mutex was unlocked
	if (animToStop) {
	// try to stop the top level group
	QAbstractAnimation *current = animToStop;
	while (current->group() && current->state() != Stopped)
	current = current->group();
	current->stop();
	}
	}

	#include "moc_qpropertyanimation.cpp"

	QT_END_NAMESPACE

	#endif //QT_NO_ANIMATION