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Diffstat (limited to 'src/declarative/util/qdeclarativeconnection.cpp')
| -rw-r--r-- | src/declarative/util/qdeclarativeconnection.cpp | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/src/declarative/util/qdeclarativeconnection.cpp b/src/declarative/util/qdeclarativeconnection.cpp deleted file mode 100644 index e9ae74b..0000000 --- a/src/declarative/util/qdeclarativeconnection.cpp +++ /dev/null @@ -1,287 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qdeclarativeconnection_p.h" - -#include <qdeclarativeexpression.h> -#include <qdeclarativeboundsignal_p.h> -#include <qdeclarativecontext.h> - -#include <QtCore/qdebug.h> -#include <QtCore/qstringlist.h> - -#include <private/qobject_p.h> - -QT_BEGIN_NAMESPACE - -class QDeclarativeConnectionPrivate : public QObjectPrivate -{ -public: - QDeclarativeConnectionPrivate() : boundsignal(0), signalSender(0), scriptset(false), componentcomplete(false) {} - - QDeclarativeBoundSignal *boundsignal; - QObject *signalSender; - QDeclarativeScriptString script; - bool scriptset; - QString signal; - bool componentcomplete; -}; - -/*! - \qmlclass Connection QDeclarativeConnection - \since 4.7 - \brief A Connection object describes generalized connections to signals. - - When connecting to signals in QML, the usual way is to create an - "on<Signal>" handler that reacts when a signal is received, like this: - - \qml - MouseArea { - onClicked: { foo(x+123,y+456) } - } - \endqml - - However, in some cases, it is not possible to connect to a signal in this - way. For example, JavaScript-in-HTML style signal properties do not allow: - - \list - \i connecting to signals with the same name but different parameters - \i conformance checking that parameters are correctly named - \i multiple connections to the same signal - \i connections outside the scope of the signal sender - \i signals in classes with coincidentally-named on<Signal> properties - \endlist - - When any of these are needed, the Connection object can be used instead. - - For example, the above code can be changed to use a Connection object, - like this: - - \qml - MouseArea { - Connection { - signal: "clicked(x,y)" - script: { foo(x+123,y+456) } - } - } - \endqml - - More generally, the Connection object can be a child of some other object than - the sender of the signal: - - \qml - MouseArea { - id: mr - } - ... - Connection { - sender: mr - signal: "clicked(x,y)" - script: { foo(x+123,y+456) } - } - \endqml -*/ - -/*! - \internal - \class QDeclarativeConnection - \brief The QDeclarativeConnection class describes generalized connections to signals. - -*/ -QDeclarativeConnection::QDeclarativeConnection(QObject *parent) : - QObject(*(new QDeclarativeConnectionPrivate), parent) -{ -} - -QDeclarativeConnection::~QDeclarativeConnection() -{ - Q_D(QDeclarativeConnection); - delete d->boundsignal; -} - -/*! - \qmlproperty Object Connection::sender - This property holds the object that sends the signal. - - By default, the sender is assumed to be the parent of the Connection. -*/ -QObject *QDeclarativeConnection::signalSender() const -{ - Q_D(const QDeclarativeConnection); - return d->signalSender ? d->signalSender : parent(); -} - -void QDeclarativeConnection::setSignalSender(QObject *obj) -{ - Q_D(QDeclarativeConnection); - if (d->signalSender == obj) - return; - disconnectIfValid(); - d->signalSender = obj; - connectIfValid(); -} - -void QDeclarativeConnection::connectIfValid() -{ - Q_D(QDeclarativeConnection); - if (!d->componentcomplete) - return; - // boundsignal must not exist - if ((d->signalSender || parent()) && !d->signal.isEmpty() && d->scriptset) { - // create - // XXX scope? - int sigIdx = -1; - int lparen = d->signal.indexOf(QLatin1Char('(')); - QList<QByteArray> sigparams; - if (lparen >= 0 && d->signal.length() > lparen+2) { - QStringList l = d->signal.mid(lparen+1,d->signal.length()-lparen-2).split(QLatin1Char(',')); - foreach (const QString &s, l) { - sigparams.append(s.trimmed().toUtf8()); - } - } - QString signalname = d->signal.left(lparen); - QObject *sender = d->signalSender ? d->signalSender : parent(); - const QMetaObject *mo = sender->metaObject(); - int methods = mo->methodCount(); - for (int ii = 0; ii < methods; ++ii) { - QMetaMethod method = mo->method(ii); - QString methodName = QString::fromUtf8(method.signature()); - int idx = methodName.indexOf(QLatin1Char('(')); - methodName = methodName.left(idx); - if (methodName == signalname && (lparen<0 || method.parameterNames() == sigparams)) { - sigIdx = ii; - break; - } - } - if (sigIdx < 0) { - // Cannot usefully warn, since could be in middle of - // changing sender and signal. - // XXX need state change transactions to do better - return; - } - - d->boundsignal = new QDeclarativeBoundSignal(qmlContext(this), d->script.script(), sender, mo->method(sigIdx), this); - } -} - -void QDeclarativeConnection::disconnectIfValid() -{ - Q_D(QDeclarativeConnection); - if (!d->componentcomplete) - return; - if ((d->signalSender || parent()) && !d->signal.isEmpty() && d->scriptset) { - // boundsignal must exist - // destroy - delete d->boundsignal; - d->boundsignal = 0; - } -} - -void QDeclarativeConnection::componentComplete() -{ - Q_D(QDeclarativeConnection); - d->componentcomplete=true; - connectIfValid(); -} - - -/*! - \qmlproperty script Connection::script - This property holds the JavaScript executed whenever the signal is sent. -*/ -QDeclarativeScriptString QDeclarativeConnection::script() const -{ - Q_D(const QDeclarativeConnection); - return d->script; -} - -void QDeclarativeConnection::setScript(const QDeclarativeScriptString& script) -{ - Q_D(QDeclarativeConnection); - if ((d->signalSender || parent()) && !d->signal.isEmpty()) { - if (!d->scriptset) { - // mustn't exist - create - d->scriptset = true; - d->script = script; - connectIfValid(); - } else { - // must exist - update - d->script = script; - d->boundsignal->expression()->setExpression(script.script()); - } - } else { - d->scriptset = true; - d->script = script; - } -} - -/*! - \qmlproperty string Connection::signal - This property holds the signal from the sender to which the script is attached. - - The signal's formal parameter names must be given in parentheses: - - \qml -Connection { - signal: "clicked(x,y)" - script: { ... } -} - \endqml -*/ -QString QDeclarativeConnection::signal() const -{ - Q_D(const QDeclarativeConnection); - return d->signal; -} - -void QDeclarativeConnection::setSignal(const QString& sig) -{ - Q_D(QDeclarativeConnection); - if (d->signal == sig) - return; - disconnectIfValid(); - d->signal = sig; - connectIfValid(); -} - - - -QT_END_NAMESPACE |