/****************************************************************************
** $Id: qt/src/kernel/qsignalmapper.cpp   2.3.7   edited 2001-01-26 $
**
** Implementation of QSignalMapper class
**
** Created : 980503
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the kernel module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** 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
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
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**********************************************************************/

#include "qsignalmapper.h"
#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;
};

// NOT REVISED
/*!
  \class QSignalMapper qsignalmapper.h
  \brief The QSignalMapper class bundles signals from identifiable senders.

  Collects a set of parameterless signals, re-emitting them with an
  integer or string parameters corresponding to the object which sent the
  signal.
*/

/*!
  Constructs a QSignalMapper.  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;
}

/*!
  Destructs the QSignalMapper.
*/
QSignalMapper::~QSignalMapper()
{
    delete d;
}

/*!
  Adds a mapping such that when map() is signalled from the given
  sender, the signal mapped(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;
}

/*!
  Adds a mapping such that when map() is signalled from the given
  sender, the signal mapper(identifier) is emitted.

  There may be at most one string identifier for each object, and
  it may not be null.
*/
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 signalled from an object which
  has an integer mapping set.

  \sa setMapping(int)
*/

/*!
  \fn void QSignalMapper::mapped(const QString&)


  This signal is emitted when map() is signalled from an object which
  has a string mapping set.

  \sa setMapping(QString)
*/
