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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.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QVALUEANIMATION_H
#define QVALUEANIMATION_H
#include <QtCore/qvariantanimation.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QGraphicsItem;
class QValueAnimationPrivate;
QT_MODULE(Gui)
struct AbstractProperty {
virtual void write(const QVariant &value) = 0;
virtual QVariant read() const = 0;
};
# define CALL_MEMBER_FN(object,ptrToMember) ((object)->*(ptrToMember))
template <typename Target, typename T>
class MemberFunctionProperty : public AbstractProperty {
public:
typedef void (Target::*RefWrite)(const T &);
typedef T (Target::*ValRead)(void) const;
MemberFunctionProperty(Target *target, ValRead readFunc, RefWrite writeFunc)
: m_target(target), m_readFn(readFunc), m_writeFn(writeFunc) {}
virtual void write(const QVariant &value) {
CALL_MEMBER_FN(m_target, m_writeFn)(qVariantValue<T>(value));
}
virtual QVariant read() const {
if (m_readFn)
return qVariantFromValue<T>(CALL_MEMBER_FN(m_target, m_readFn)());
return QVariant();
}
private:
Target *m_target;
ValRead m_readFn;
RefWrite m_writeFn;
};
class QValueAnimation : public QVariantAnimation
{
Q_OBJECT
public:
QValueAnimation(QObject *parent = 0);
~QValueAnimation();
template <typename Target, typename T>
void setMemberFunction(Target *target,
T (Target::*readFunc)(void) const, // ### useValRead typedef
void (Target::*writeFunc)(const T &) // ### use RefWrite typedef
) {
// ### ownership of MemberFunctionProperty
AbstractProperty *animProp = new MemberFunctionProperty<Target, T>(target, readFunc, writeFunc);
setProperty(animProp);
}
void updateCurrentValue(const QVariant &value);
void updateState(QAbstractAnimation::State oldState, QAbstractAnimation::State newState);
void setProperty(AbstractProperty *animProp);
private:
Q_DISABLE_COPY(QValueAnimation);
Q_DECLARE_PRIVATE(QValueAnimation);
};
#endif // QVALUEANIMATION_H
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