tools/qvfb/qvfbprotocol.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 00:43:10 +0200
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child 4 3b1da2848fc7
permissions -rw-r--r--
Revision: 201003 Kit: 201005
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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the tools applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qvfbprotocol.h"
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#include "qvfbhdr.h"
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#include <QDebug>
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#include <QTimer>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <math.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef Q_OS_UNIX
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#include <unistd.h>
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#endif
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#include "qvfbshmem.h"
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QT_BEGIN_NAMESPACE
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QVFbViewProtocol::QVFbViewProtocol(int display_id, QObject *parent) :
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    QObject(parent), mDisplayId(display_id) { }
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QVFbViewProtocol::~QVFbViewProtocol() {}
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void QVFbViewProtocol::flushChanges() {}
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void QVFbViewProtocol::sendKeyboardData(QString unicode, int keycode,
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                                        int modifiers, bool press, bool repeat)
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{
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    if (keyHandler())
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        keyHandler()->sendKeyboardData(unicode, keycode, modifiers, press, repeat);
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}
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void QVFbViewProtocol::sendMouseData(const QPoint &pos, int buttons, int wheel)
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{
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    if (mouseHandler())
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        mouseHandler()->sendMouseData(pos, buttons, wheel);
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}
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static int openPipe(const char *fileName)
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{
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    unlink(fileName);
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    mkfifo(fileName, 0666);
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    int fd = ::open(fileName, O_RDWR | O_NDELAY);
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    return fd;
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}
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QVFbKeyPipeProtocol::QVFbKeyPipeProtocol(int display_id)
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    : QVFbKeyProtocol(display_id)
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{
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    fileName = QT_VFB_KEYBOARD_PIPE(display_id);
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    fd = openPipe(fileName.toLocal8Bit().constData());
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    if (fd == -1)
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	qFatal("Cannot open keyboard pipe %s", fileName.toLocal8Bit().data());
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}
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QVFbKeyPipeProtocol::~QVFbKeyPipeProtocol()
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{
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    sendKeyboardData(0, 0, 0, true, false); // magic die key
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    ::close(fd);
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    unlink(fileName.toLocal8Bit().constData());
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}
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void QVFbKeyPipeProtocol::sendKeyboardData(QString unicode, int keycode,
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                                           int modifiers, bool press, bool repeat)
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{
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    QVFbKeyData kd;
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    kd.unicode = unicode[0].unicode();
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    kd.keycode = keycode;
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    kd.modifiers = static_cast<Qt::KeyboardModifier>(modifiers);
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    kd.press = press;
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    kd.repeat = repeat;
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    write(fd, &kd, sizeof(QVFbKeyData));
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}
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QVFbMousePipe::QVFbMousePipe(int display_id)
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    : QVFbMouseProtocol(display_id)
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{
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    fileName = QT_VFB_MOUSE_PIPE(display_id);
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    fd = openPipe(fileName.toLocal8Bit().constData());
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    if (fd == -1)
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	qFatal("Cannot open mouse pipe %s", fileName.toLocal8Bit().data());
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}
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QVFbMousePipe::~QVFbMousePipe()
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{
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    ::close(fd);
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    unlink(fileName.toLocal8Bit().constData());
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}
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void QVFbMousePipe::sendMouseData(const QPoint &pos, int buttons, int wheel)
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{
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    write(fd, &pos, sizeof(QPoint));
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    write(fd, &buttons, sizeof(int));
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    write(fd, &wheel, sizeof(int));
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}
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QVFbMouseLinuxTP::QVFbMouseLinuxTP(int display_id)
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    : QObject(), QVFbMousePipe(display_id), lastPos(-1,-1)
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{
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    /* the timer is needed because a real touch screen send data as long as
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       there is pressure.  And the linux tp driver will filter, requiring
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       a minimum of 5 samples before it even registers a press.
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    */
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    repeater = new QTimer(this);
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    connect(repeater, SIGNAL(timeout()), this, SLOT(repeatLastPress()));
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}
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QVFbMouseLinuxTP::~QVFbMouseLinuxTP()
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{
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}
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void QVFbMouseLinuxTP::sendMouseData(const QPoint &pos, int buttons, int)
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{
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    if (buttons & Qt::LeftButton) {
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        // press
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        repeater->start(5);
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        writeToPipe(pos, 1);
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        lastPos = pos;
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    } else {
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        // release
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        if (lastPos == QPoint(-1,-1))
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            return; /* only send one release */
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        repeater->stop();
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        writeToPipe(pos, 0);
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        lastPos = QPoint(-1,-1);
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    }
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}
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void QVFbMouseLinuxTP::writeToPipe(const QPoint &pos, ushort pressure)
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{
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    ushort v;
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    write(fd, &pressure, sizeof(ushort));
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    v = pos.x();
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    write(fd, &v, sizeof(ushort));
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    v = pos.y();
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    write(fd, &v, sizeof(ushort));
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    v = 1; // pad
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    write(fd, &v, sizeof(ushort));
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}
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void QVFbMouseLinuxTP::repeatLastPress()
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{
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    writeToPipe(lastPos, 1);
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}
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QT_END_NAMESPACE