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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui 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 "qapplication.h"

#include <private/qobject_p.h>
#include "qkeymapper_p.h"
#include <qwidget.h>

QT_BEGIN_NAMESPACE

/*!
    \class QKeyMapper
    \since 4.2
    \internal

    \sa QObject
*/

/*!
    Constructs a new key mapper.
*/
QKeyMapper::QKeyMapper()
    : QObject(*new QKeyMapperPrivate, 0)
{
}

/*!
    Destroys the key mapper.
*/
QKeyMapper::~QKeyMapper()
{
}

QList<int> QKeyMapper::possibleKeys(QKeyEvent *e)
{
    QList<int> result;

    if (!e->nativeScanCode()) {
        if (e->key() && (e->key() != Qt::Key_unknown))
            result << int(e->key() + e->modifiers());
        else if (!e->text().isEmpty())
            result << int(e->text().at(0).unicode() + e->modifiers());
        return result;
    }

    return instance()->d_func()->possibleKeys(e);
}

extern bool qt_sendSpontaneousEvent(QObject *receiver, QEvent *event); // in qapplication_*.cpp
void QKeyMapper::changeKeyboard()
{
    instance()->d_func()->clearMappings();

    // inform all toplevel widgets of the change
    QEvent e(QEvent::KeyboardLayoutChange);
    QWidgetList list = QApplication::topLevelWidgets();
    for (int i = 0; i < list.size(); ++i) {
        QWidget *w = list.at(i);
        qt_sendSpontaneousEvent(w, &e);
    }
}

Q_GLOBAL_STATIC(QKeyMapper, keymapper)
/*!
    Returns the pointer to the single instance of QKeyMapper in the application.
    If none yet exists, the function ensures that one is created.
*/
QKeyMapper *QKeyMapper::instance()
{
    return keymapper();
}

QKeyMapperPrivate *qt_keymapper_private()
{
    return QKeyMapper::instance()->d_func();
}

QT_END_NAMESPACE