diff options
Diffstat (limited to 'src/declarative/qml/qdeclarativebinding_p.h')
| -rw-r--r-- | src/declarative/qml/qdeclarativebinding_p.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativebinding_p.h b/src/declarative/qml/qdeclarativebinding_p.h new file mode 100644 index 00000000..042b45d0 --- /dev/null +++ b/src/declarative/qml/qdeclarativebinding_p.h @@ -0,0 +1,193 @@ +/**************************************************************************** +** +** Copyright (C) 2012 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 <QtCore/QObject> +#include <QtCore/QMetaProperty> + +QT_BEGIN_NAMESPACE + +class Q_DECLARATIVE_PRIVATE_EXPORT QDeclarativeAbstractBinding +{ +public: + typedef QWeakPointer<QDeclarativeAbstractBinding> Pointer; + + QDeclarativeAbstractBinding(); + + virtual void destroy(); + + virtual QString expression() const; + + enum Type { PropertyBinding, ValueTypeProxy }; + virtual Type bindingType() const { return PropertyBinding; } + + QObject *object() const; + int propertyIndex() const; + + void setEnabled(bool e) { setEnabled(e, QDeclarativePropertyPrivate::DontRemoveBinding); } + virtual void setEnabled(bool, QDeclarativePropertyPrivate::WriteFlags) = 0; + + void update() { update(QDeclarativePropertyPrivate::DontRemoveBinding); } + virtual void update(QDeclarativePropertyPrivate::WriteFlags) = 0; + + void addToObject(QObject *, int); + 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 QDeclarativeComponentPrivate; + friend class QDeclarativeValueTypeProxyBinding; + friend class QDeclarativePropertyPrivate; + friend class QDeclarativeVME; + friend class QtSharedPointer::ExternalRefCount<QDeclarativeAbstractBinding>; + + QObject *m_object; + int m_propertyIndex; + QDeclarativeAbstractBinding **m_mePtr; + QDeclarativeAbstractBinding **m_prevBinding; + QDeclarativeAbstractBinding *m_nextBinding; + QSharedPointer<QDeclarativeAbstractBinding> 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 void update(QDeclarativePropertyPrivate::WriteFlags); + + QDeclarativeAbstractBinding *binding(int propertyIndex); + + void removeBindings(quint32 mask); + +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_PRIVATE_EXPORT QDeclarativeBinding : public QDeclarativeExpression, public QDeclarativeAbstractBinding +{ +Q_OBJECT +public: + enum EvaluateFlag { RequiresThisObject = 0x01 }; + Q_DECLARE_FLAGS(EvaluateFlags, EvaluateFlag) + + 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); + QDeclarativeBinding(const QScriptValue &, QObject *, QDeclarativeContextData *, QObject *parent=0); + + void setTarget(const QDeclarativeProperty &); + QDeclarativeProperty property() const; + + void setEvaluateFlags(EvaluateFlags flags); + EvaluateFlags evaluateFlags() const; + + bool enabled() const; + + // Inherited from QDeclarativeAbstractBinding + virtual void setEnabled(bool, QDeclarativePropertyPrivate::WriteFlags flags); + virtual void update(QDeclarativePropertyPrivate::WriteFlags flags); + virtual QString expression() const; + + typedef int Identifier; + static Identifier Invalid; + static QDeclarativeBinding *createBinding(Identifier, QObject *, QDeclarativeContext *, const QString &, int, QObject *parent=0); + +public Q_SLOTS: + void update() { update(QDeclarativePropertyPrivate::DontRemoveBinding); } + +protected: + ~QDeclarativeBinding(); + void emitValueChanged(); + +private: + Q_DECLARE_PRIVATE(QDeclarativeBinding) +}; + +Q_DECLARE_OPERATORS_FOR_FLAGS(QDeclarativeBinding::EvaluateFlags) + +QT_END_NAMESPACE + +Q_DECLARE_METATYPE(QDeclarativeBinding*) + +#endif // QDECLARATIVEBINDING_P_H |