/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** 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.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef QT_NO_QWS_MOUSE_QVFB

#include <stdlib.h>

#include <sys/types.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <stdio.h>

#include <qvfbhdr.h>

#include <qmousevfb_qws.h>

#include <qwindowsystem_qws.h>

#include <qsocketnotifier.h>

#include <qapplication.h>

#include <qtimer.h>

#include <private/qcore_unix_p.h> // overrides QT_OPEN

QT_BEGIN_NAMESPACE

QVFbMouseHandler::QVFbMouseHandler(const QString &driver, const QString &device)

    : QObject(), QWSMouseHandler(driver, device)

{

    QString mouseDev = device;

    if (device.isEmpty())

        mouseDev = QLatin1String("/dev/vmouse");

    mouseFD = QT_OPEN(mouseDev.toLatin1().constData(), O_RDWR | O_NDELAY);

    if (mouseFD == -1) {

        perror("QVFbMouseHandler::QVFbMouseHandler");

        qWarning("QVFbMouseHander: Unable to open device %s",

                 qPrintable(mouseDev));

        return;

    }

    // Clear pending input

    char buf[2];

    while (QT_READ(mouseFD, buf, 1) > 0) { }

    mouseIdx = 0;

    mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);

    connect(mouseNotifier, SIGNAL(activated(int)),this, SLOT(readMouseData()));

}

QVFbMouseHandler::~QVFbMouseHandler()

{

    if (mouseFD >= 0)

        QT_CLOSE(mouseFD);

}

void QVFbMouseHandler::resume()

{

    mouseNotifier->setEnabled(true);

}

void QVFbMouseHandler::suspend()

{

    mouseNotifier->setEnabled(false);

}

void QVFbMouseHandler::readMouseData()

{

    int n;

    do {

        n = QT_READ(mouseFD, mouseBuf+mouseIdx, mouseBufSize-mouseIdx);

        if (n > 0)

            mouseIdx += n;

    } while (n > 0);

    int idx = 0;

    static const int packetsize = sizeof(QPoint) + 2*sizeof(int);

    while (mouseIdx-idx >= packetsize) {

        uchar *mb = mouseBuf+idx;

        QPoint mousePos = *reinterpret_cast<QPoint *>(mb);

        mb += sizeof(QPoint);

        int bstate = *reinterpret_cast<int *>(mb);

        mb += sizeof(int);

        int wheel = *reinterpret_cast<int *>(mb);

//        limitToScreen(mousePos);

        mouseChanged(mousePos, bstate, wheel);

        idx += packetsize;

    }

    int surplus = mouseIdx - idx;

    for (int i = 0; i < surplus; i++)

        mouseBuf[i] = mouseBuf[idx+i];

    mouseIdx = surplus;

}

QT_END_NAMESPACE

#endif // QT_NO_QWS_MOUSE_QVFB