| /**************************************************************************** |
| ** |
| ** 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 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 QDECLARATIVENOTIFIER_P_H |
| #define QDECLARATIVENOTIFIER_P_H |
| |
| #include "private/qdeclarativeguard_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QDeclarativeNotifierEndpoint; |
| class QDeclarativeNotifier |
| { |
| public: |
| inline QDeclarativeNotifier(); |
| inline ~QDeclarativeNotifier(); |
| inline void notify(); |
| |
| private: |
| friend class QDeclarativeNotifierEndpoint; |
| |
| static void emitNotify(QDeclarativeNotifierEndpoint *); |
| QDeclarativeNotifierEndpoint *endpoints; |
| }; |
| |
| class QDeclarativeNotifierEndpoint |
| { |
| public: |
| inline QDeclarativeNotifierEndpoint(); |
| inline QDeclarativeNotifierEndpoint(QObject *t, int m); |
| inline ~QDeclarativeNotifierEndpoint(); |
| |
| QObject *target; |
| int targetMethod; |
| |
| inline bool isConnected(); |
| inline bool isConnected(QObject *source, int sourceSignal); |
| inline bool isConnected(QDeclarativeNotifier *); |
| |
| void connect(QObject *source, int sourceSignal); |
| inline void connect(QDeclarativeNotifier *); |
| inline void disconnect(); |
| |
| void copyAndClear(QDeclarativeNotifierEndpoint &other); |
| |
| private: |
| friend class QDeclarativeNotifier; |
| |
| struct Signal { |
| QDeclarativeGuard<QObject> source; |
| int sourceSignal; |
| }; |
| |
| struct Notifier { |
| QDeclarativeNotifier *notifier; |
| QDeclarativeNotifierEndpoint **disconnected; |
| |
| QDeclarativeNotifierEndpoint *next; |
| QDeclarativeNotifierEndpoint **prev; |
| }; |
| |
| enum { InvalidType, SignalType, NotifierType } type; |
| union { |
| char signalData[sizeof(Signal)]; |
| char notifierData[sizeof(Notifier)]; |
| }; |
| |
| inline Notifier *toNotifier(); |
| inline Notifier *asNotifier(); |
| inline Signal *toSignal(); |
| inline Signal *asSignal(); |
| }; |
| |
| QDeclarativeNotifier::QDeclarativeNotifier() |
| : endpoints(0) |
| { |
| } |
| |
| QDeclarativeNotifier::~QDeclarativeNotifier() |
| { |
| QDeclarativeNotifierEndpoint *endpoint = endpoints; |
| while (endpoint) { |
| QDeclarativeNotifierEndpoint::Notifier *n = endpoint->asNotifier(); |
| endpoint = n->next; |
| |
| n->next = 0; |
| n->prev = 0; |
| n->notifier = 0; |
| if (n->disconnected) *n->disconnected = 0; |
| n->disconnected = 0; |
| } |
| endpoints = 0; |
| } |
| |
| void QDeclarativeNotifier::notify() |
| { |
| if (endpoints) emitNotify(endpoints); |
| } |
| |
| QDeclarativeNotifierEndpoint::QDeclarativeNotifierEndpoint() |
| : target(0), targetMethod(0), type(InvalidType) |
| { |
| } |
| |
| QDeclarativeNotifierEndpoint::QDeclarativeNotifierEndpoint(QObject *t, int m) |
| : target(t), targetMethod(m), type(InvalidType) |
| { |
| } |
| |
| QDeclarativeNotifierEndpoint::~QDeclarativeNotifierEndpoint() |
| { |
| disconnect(); |
| if (SignalType == type) { |
| Signal *s = asSignal(); |
| s->~Signal(); |
| } |
| } |
| |
| bool QDeclarativeNotifierEndpoint::isConnected() |
| { |
| if (SignalType == type) { |
| return asSignal()->source; |
| } else if (NotifierType == type) { |
| return asNotifier()->notifier; |
| } else { |
| return false; |
| } |
| } |
| |
| bool QDeclarativeNotifierEndpoint::isConnected(QObject *source, int sourceSignal) |
| { |
| return SignalType == type && asSignal()->source == source && asSignal()->sourceSignal == sourceSignal; |
| } |
| |
| bool QDeclarativeNotifierEndpoint::isConnected(QDeclarativeNotifier *notifier) |
| { |
| return NotifierType == type && asNotifier()->notifier == notifier; |
| } |
| |
| void QDeclarativeNotifierEndpoint::connect(QDeclarativeNotifier *notifier) |
| { |
| Notifier *n = toNotifier(); |
| |
| if (n->notifier == notifier) |
| return; |
| |
| disconnect(); |
| |
| n->next = notifier->endpoints; |
| if (n->next) { n->next->asNotifier()->prev = &n->next; } |
| notifier->endpoints = this; |
| n->prev = ¬ifier->endpoints; |
| n->notifier = notifier; |
| } |
| |
| void QDeclarativeNotifierEndpoint::disconnect() |
| { |
| if (type == SignalType) { |
| Signal *s = (Signal *)&signalData; |
| if (s->source) { |
| QMetaObject::disconnectOne(s->source, s->sourceSignal, target, targetMethod); |
| s->source = 0; |
| } |
| } else if (type == NotifierType) { |
| Notifier *n = asNotifier(); |
| |
| if (n->next) n->next->asNotifier()->prev = n->prev; |
| if (n->prev) *n->prev = n->next; |
| if (n->disconnected) *n->disconnected = 0; |
| n->next = 0; |
| n->prev = 0; |
| n->disconnected = 0; |
| n->notifier = 0; |
| } |
| } |
| |
| QDeclarativeNotifierEndpoint::Notifier *QDeclarativeNotifierEndpoint::toNotifier() |
| { |
| if (NotifierType == type) |
| return asNotifier(); |
| |
| if (SignalType == type) { |
| disconnect(); |
| Signal *s = asSignal(); |
| s->~Signal(); |
| } |
| |
| Notifier *n = asNotifier(); |
| n->next = 0; |
| n->prev = 0; |
| n->disconnected = 0; |
| n->notifier = 0; |
| type = NotifierType; |
| return n; |
| } |
| |
| QDeclarativeNotifierEndpoint::Notifier *QDeclarativeNotifierEndpoint::asNotifier() |
| { |
| return (Notifier *)(¬ifierData); |
| } |
| |
| QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::toSignal() |
| { |
| if (SignalType == type) |
| return asSignal(); |
| |
| disconnect(); |
| Signal *s = asSignal(); |
| new (s) Signal; |
| type = SignalType; |
| |
| return s; |
| } |
| |
| QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::asSignal() |
| { |
| return (Signal *)(&signalData); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QDECLARATIVENOTIFIER_P_H |
| |