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  #include "qsignalmapper.h"
  #ifndef QT_NO_SIGNALMAPPER
  #include "qhash.h"
  #include "qobject_p.h"
  
  QT_BEGIN_NAMESPACE
  
  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 objectmodel
  
  
      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:
  
      \snippet doc/src/snippets/qsignalmapper/buttonwidget.h 0
      \snippet doc/src/snippets/qsignalmapper/buttonwidget.h 1
  
      The only function that we need to implement is the constructor:
  
      \snippet doc/src/snippets/qsignalmapper/buttonwidget.cpp 0
      \snippet doc/src/snippets/qsignalmapper/buttonwidget.cpp 1
      \snippet doc/src/snippets/qsignalmapper/buttonwidget.cpp 2
  
      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 QSignalMapper()
      \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()));
  }
  
  /*!
      Adds a mapping so that when map() is signalled from the \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()));
  }
  
  /*!
      Adds a mapping so that when map() is signalled from the \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()));
  }
  
  /*!
      Adds a mapping so that when map() is signalled from the \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 \a id.
  
      \sa setMapping()
  */
  QObject *QSignalMapper::mapping(int id) const
  {
      Q_D(const QSignalMapper);
      return d->intHash.key(id);
  }
  
  /*!
      \overload mapping()
  */
  QObject *QSignalMapper::mapping(const QString &id) const
  {
      Q_D(const QSignalMapper);
      return d->stringHash.key(id);
  }
  
  /*!
      \overload mapping()
  
      Returns the sender QObject that is associated with the \a widget.
  */
  QObject *QSignalMapper::mapping(QWidget *widget) const
  {
      Q_D(const QSignalMapper);
      return d->widgetHash.key(widget);
  }
  
  /*!
      \overload mapping()
  
      Returns the sender QObject that is associated with the \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)
  
      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)
  
      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)
  
      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()
  */
  
  QT_END_NAMESPACE
  
  #include "moc_qsignalmapper.cpp"
  
  #endif // QT_NO_SIGNALMAPPER
  
  