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Diffstat (limited to 'src/kernel/qsignalmapper.cpp')
| -rw-r--r-- | src/kernel/qsignalmapper.cpp | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/kernel/qsignalmapper.cpp b/src/kernel/qsignalmapper.cpp new file mode 100644 index 0000000..848976c --- /dev/null +++ b/src/kernel/qsignalmapper.cpp @@ -0,0 +1,183 @@ +/**************************************************************************** +** +** Implementation of QSignalMapper class +** +** Created : 980503 +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the kernel module of the Qt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free Qt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.QPL +** included in the packaging of this file. Licensees holding valid Qt +** Commercial licenses may use this file in accordance with the Qt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "qsignalmapper.h" +#ifndef QT_NO_SIGNALMAPPER +#include "qptrdict.h" + +struct QSignalMapperRec { + QSignalMapperRec() + { + has_int = 0; + str_id = QString::null; + } + + uint has_int:1; + + int int_id; + QString str_id; + // extendable to other types of identification +}; + +class QSignalMapperData { +public: + QSignalMapperData() + { + dict.setAutoDelete( TRUE ); + } + + QPtrDict<QSignalMapperRec> dict; +}; + +/*! + \class QSignalMapper qsignalmapper.h + \brief The QSignalMapper class bundles signals from identifiable senders. + + \ingroup io + + This class collects a set of parameterless signals, and re-emits + them with integer or string parameters corresponding to the object + that sent the signal. +*/ + +/*! + Constructs a QSignalMapper called \a name, with parent \a parent. + Like all QObjects, it will be deleted when the parent is deleted. +*/ +QSignalMapper::QSignalMapper( QObject* parent, const char* name ) : + QObject( parent, name ) +{ + d = new QSignalMapperData; +} + +/*! + Destroys the QSignalMapper. +*/ +QSignalMapper::~QSignalMapper() +{ + delete d; +} + +/*! + Adds a mapping so that when map() is signaled from the given \a + sender, the signal mapped(\a identifier) is emitted. + + There may be at most one integer identifier for each object. +*/ +void QSignalMapper::setMapping( const QObject* sender, int identifier ) +{ + QSignalMapperRec* rec = getRec(sender); + rec->int_id = identifier; + rec->has_int = 1; +} + +/*! + \overload + + Adds a mapping so that when map() is signaled from the given \a + sender, the signal mapper(\a identifier) is emitted. + + There may be at most one string identifier for each object, and it + may not be empty. +*/ +void QSignalMapper::setMapping( const QObject* sender, const QString &identifier ) +{ + QSignalMapperRec* rec = getRec(sender); + rec->str_id = identifier; +} + +/*! + Removes all mappings for \a sender. This is done automatically + when mapped objects are destroyed. +*/ +void QSignalMapper::removeMappings( const QObject* sender ) +{ + d->dict.remove((void*)sender); +} + +void QSignalMapper::removeMapping() +{ + removeMappings(sender()); +} + +/*! + This slot emits signals based on which object sends signals to it. +*/ +void QSignalMapper::map() +{ + const QObject* s = sender(); + QSignalMapperRec* rec = d->dict.find( (void*)s ); + if ( rec ) { + if ( rec->has_int ) + emit mapped( rec->int_id ); + if ( !rec->str_id.isEmpty() ) + emit mapped( rec->str_id ); + } +} + +QSignalMapperRec* QSignalMapper::getRec( const QObject* sender ) +{ + QSignalMapperRec* rec = d->dict.find( (void*)sender ); + if (!rec) { + rec = new QSignalMapperRec; + d->dict.insert( (void*)sender, rec ); + connect( sender, SIGNAL(destroyed()), this, SLOT(removeMapping()) ); + } + return rec; +} + +/*! + \fn void QSignalMapper::mapped(int) + + This signal is emitted when map() is signaled from an object that + has an integer mapping set. + + \sa setMapping() +*/ + +/*! + \overload void QSignalMapper::mapped(const QString&) + + This signal is emitted when map() is signaled from an object that + has a string mapping set. + + \sa setMapping() +*/ +#endif //QT_NO_SIGNALMAPPER |