/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#include "qsignalmapper.h"#ifndef QT_NO_SIGNALMAPPER#include "qhash.h"#include "qobject_p.h"class QSignalMapperPrivate : public QObjectPrivate{    Q_DECLARE_PUBLIC(QSignalMapper)public:    void _q_senderDestroyed() {        Q_Q(QSignalMapper);        q->removeMappings(q->sender());    }    QHash<QObject *, int> intHash;    QHash<QObject *, QString> stringHash;    QHash<QObject *, QWidget*> widgetHash;    QHash<QObject *, QObject*> objectHash;};/*!    \class QSignalMapper    \brief The QSignalMapper class bundles signals from identifiable senders.    \ingroup io    \mainclass    This class collects a set of parameterless signals, and re-emits    them with integer, string or widget parameters corresponding to    the object that sent the signal.    The class supports the mapping of particular strings or integers    with particular objects using setMapping(). The objects' signals    can then be connected to the map() slot which will emit the    mapped() signal with the string or integer associated with the    original signalling object. Mappings can be removed later using    removeMappings().    Example: Suppose we want to create a custom widget that contains    a group of buttons (like a tool palette). One approach is to    connect each button's \c clicked() signal to its own custom slot;    but in this example we want to connect all the buttons to a    single slot and parameterize the slot by the button that was    clicked.    Here's the definition of a simple custom widget that has a single    signal, \c clicked(), which is emitted with the text of the button    that was clicked:    \quotefromfile snippets/qsignalmapper/buttonwidget.h    \skipto QWidget    \printuntil QSignalMapper    \printuntil };    The only function that we need to implement is the constructor:    \quotefromfile snippets/qsignalmapper/buttonwidget.cpp    \skipto ButtonWidget    \printuntil connect    \printuntil connect    \printuntil }    A list of texts is passed to the constructor. A signal mapper is    constructed and for each text in the list a QPushButton is    created. We connect each button's \c clicked() signal to the    signal mapper's map() slot, and create a mapping in the signal    mapper from each button to the button's text. Finally we connect    the signal mapper's mapped() signal to the custom widget's \c    clicked() signal. When the user clicks a button, the custom    widget will emit a single \c clicked() signal whose argument is    the text of the button the user clicked.    \sa QObject, QButtonGroup, QActionGroup*//*!    Constructs a QSignalMapper with parent \a parent.*/QSignalMapper::QSignalMapper(QObject* parent)    : QObject(*new QSignalMapperPrivate, parent){}#ifdef QT3_SUPPORT/*!    \overload    \obsolete */QSignalMapper::QSignalMapper(QObject *parent, const char *name)    : QObject(*new QSignalMapperPrivate, parent){    setObjectName(QString::fromAscii(name));}#endif/*!    Destroys the QSignalMapper.*/QSignalMapper::~QSignalMapper(){}/*!    Adds a mapping so that when map() is signalled from the given \a    sender, the signal mapped(\a id) is emitted.    There may be at most one integer ID for each sender.    \sa mapping()*/void QSignalMapper::setMapping(QObject *sender, int id){    Q_D(QSignalMapper);    d->intHash.insert(sender, id);    connect(sender, SIGNAL(destroyed()), this, SLOT(_q_senderDestroyed()));}/*!    \overload    Adds a mapping so that when map() is signalled from the given \a    sender, the signal mapped(\a text ) is emitted.    There may be at most one text for each sender.*/void QSignalMapper::setMapping(QObject *sender, const QString &text){    Q_D(QSignalMapper);    d->stringHash.insert(sender, text);    connect(sender, SIGNAL(destroyed()), this, SLOT(_q_senderDestroyed()));}/*!    \overload    Adds a mapping so that when map() is signalled from the given \a    sender, the signal mapped(\a widget ) is emitted.    There may be at most one widget for each sender.*/void QSignalMapper::setMapping(QObject *sender, QWidget *widget){    Q_D(QSignalMapper);    d->widgetHash.insert(sender, widget);    connect(sender, SIGNAL(destroyed()), this, SLOT(_q_senderDestroyed()));}/*!    \overload    Adds a mapping so that when map() is signalled from the given \a    sender, the signal mapped(\a object ) is emitted.    There may be at most one object for each sender.*/void QSignalMapper::setMapping(QObject *sender, QObject *object){    Q_D(QSignalMapper);    d->objectHash.insert(sender, object);    connect(sender, SIGNAL(destroyed()), this, SLOT(_q_senderDestroyed()));}/*!    Returns the sender QObject that is associated with the given \a    id.    \sa setMapping()*/QObject *QSignalMapper::mapping(int id) const{    Q_D(const QSignalMapper);    return d->intHash.key(id);}/*!    \overload*/QObject *QSignalMapper::mapping(const QString &id) const{    Q_D(const QSignalMapper);    return d->stringHash.key(id);}/*!    \overload    Returns the sender QObject that is associated with the given \a    widget.*/QObject *QSignalMapper::mapping(QWidget *widget) const{    Q_D(const QSignalMapper);    return d->widgetHash.key(widget);}/*!    \overload    Returns the sender QObject that is associated with the given \a    object.*/QObject *QSignalMapper::mapping(QObject *object) const{    Q_D(const QSignalMapper);    return d->objectHash.key(object);}/*!    Removes all mappings for \a sender.    This is done automatically when mapped objects are destroyed.*/void QSignalMapper::removeMappings(QObject *sender){    Q_D(QSignalMapper);    d->intHash.remove(sender);    d->stringHash.remove(sender);    d->widgetHash.remove(sender);    d->objectHash.remove(sender);}/*!    This slot emits signals based on which object sends signals to it.*/void QSignalMapper::map() { map(sender()); }/*!    This slot emits signals based on the \a sender object.*/void QSignalMapper::map(QObject *sender){    Q_D(QSignalMapper);    if (d->intHash.contains(sender))        emit mapped(d->intHash.value(sender));    if (d->stringHash.contains(sender))        emit mapped(d->stringHash.value(sender));    if (d->widgetHash.contains(sender))        emit mapped(d->widgetHash.value(sender));    if (d->objectHash.contains(sender))        emit mapped(d->objectHash.value(sender));}/*!    \fn void QSignalMapper::mapped(int i)    This signal is emitted when map() is signalled from an object that    has an integer mapping set. The object's mapped integer is passed    in \a i.    \sa setMapping()*//*!    \fn void QSignalMapper::mapped(const QString &text)    \overload    This signal is emitted when map() is signalled from an object that    has a string mapping set. The object's mapped string is passed in    \a text.    \sa setMapping()*//*!    \fn void QSignalMapper::mapped(QWidget *widget)    \overload    This signal is emitted when map() is signalled from an object that    has a widget mapping set. The object's mapped widget is passed in    \a widget.    \sa setMapping()*//*!    \fn void QSignalMapper::mapped(QObject *object)    \overload    This signal is emitted when map() is signalled from an object that    has an object mapping set. The object provided by the map is passed in    \a object.    \sa setMapping()*/#include "moc_qsignalmapper.cpp"#endif // QT_NO_SIGNALMAPPER