/**************************************************************************** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying ** this package. ** ** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ** If you have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** ** ** ** ** ** ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #ifndef QDECLARATIVEBINDING_P_H #define QDECLARATIVEBINDING_P_H // // W A R N I N G // ------------- // // This file is not part of the Qt API. It exists purely as an // implementation detail. This header file may change from version to // version without notice, or even be removed. // // We mean it. // #include "qdeclarative.h" #include "qdeclarativepropertyvaluesource.h" #include "qdeclarativeexpression.h" #include "qdeclarativeproperty.h" #include "private/qdeclarativeproperty_p.h" #include #include QT_BEGIN_NAMESPACE class Q_DECLARATIVE_EXPORT QDeclarativeAbstractBinding { public: typedef QWeakPointer Pointer; QDeclarativeAbstractBinding(); virtual void destroy(); virtual QString expression() const; enum Type { PropertyBinding, ValueTypeProxy }; virtual Type bindingType() const { return PropertyBinding; } void setEnabled(bool e) { setEnabled(e, QDeclarativePropertyPrivate::DontRemoveBinding); } virtual void setEnabled(bool, QDeclarativePropertyPrivate::WriteFlags) = 0; virtual int propertyIndex() = 0; void update() { update(QDeclarativePropertyPrivate::DontRemoveBinding); } virtual void update(QDeclarativePropertyPrivate::WriteFlags) = 0; void addToObject(QObject *); void removeFromObject(); static Pointer getPointer(QDeclarativeAbstractBinding *p) { return p ? p->weakPointer() : Pointer(); } protected: virtual ~QDeclarativeAbstractBinding(); void clear(); private: Pointer weakPointer(); friend class QDeclarativeData; friend class QDeclarativeValueTypeProxyBinding; friend class QDeclarativePropertyPrivate; friend class QDeclarativeVME; friend class QtSharedPointer::ExternalRefCount; QObject *m_object; QDeclarativeAbstractBinding **m_mePtr; QDeclarativeAbstractBinding **m_prevBinding; QDeclarativeAbstractBinding *m_nextBinding; QSharedPointer m_selfPointer; }; class QDeclarativeValueTypeProxyBinding : public QDeclarativeAbstractBinding { public: QDeclarativeValueTypeProxyBinding(QObject *o, int coreIndex); virtual Type bindingType() const { return ValueTypeProxy; } virtual void setEnabled(bool, QDeclarativePropertyPrivate::WriteFlags); virtual int propertyIndex(); virtual void update(QDeclarativePropertyPrivate::WriteFlags); QDeclarativeAbstractBinding *binding(int propertyIndex); protected: ~QDeclarativeValueTypeProxyBinding(); private: void recursiveEnable(QDeclarativeAbstractBinding *, QDeclarativePropertyPrivate::WriteFlags); void recursiveDisable(QDeclarativeAbstractBinding *); friend class QDeclarativeAbstractBinding; QObject *m_object; int m_index; QDeclarativeAbstractBinding *m_bindings; }; class QDeclarativeContext; class QDeclarativeBindingPrivate; class Q_DECLARATIVE_EXPORT QDeclarativeBinding : public QDeclarativeExpression, public QDeclarativeAbstractBinding { Q_OBJECT public: QDeclarativeBinding(const QString &, QObject *, QDeclarativeContext *, QObject *parent=0); QDeclarativeBinding(const QString &, QObject *, QDeclarativeContextData *, QObject *parent=0); QDeclarativeBinding(void *, QDeclarativeRefCount *, QObject *, QDeclarativeContextData *, const QString &, int, QObject *parent); void setTarget(const QDeclarativeProperty &); QDeclarativeProperty property() const; bool enabled() const; // Inherited from QDeclarativeAbstractBinding virtual void setEnabled(bool, QDeclarativePropertyPrivate::WriteFlags flags); virtual int propertyIndex(); virtual void update(QDeclarativePropertyPrivate::WriteFlags flags); virtual QString expression() const; public Q_SLOTS: void update() { update(QDeclarativePropertyPrivate::DontRemoveBinding); } protected: ~QDeclarativeBinding(); void emitValueChanged(); private: Q_DECLARE_PRIVATE(QDeclarativeBinding) }; QT_END_NAMESPACE Q_DECLARE_METATYPE(QDeclarativeBinding*) #endif // QDECLARATIVEBINDING_P_H