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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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qmousebus_qws.h"
#ifndef QT_NO_QWS_MOUSE_BUS
#include "qwindowsystem_qws.h"
#include "qsocketnotifier.h"
#include "qapplication.h"
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <termios.h>
QT_BEGIN_NAMESPACE
/*
* bus mouse driver (a.k.a. Logitech busmouse)
*/
class QWSBusMouseHandlerPrivate : public QObject
{
Q_OBJECT
public:
QWSBusMouseHandlerPrivate(QWSBusMouseHandler *h, const QString &driver, const QString &device);
~QWSBusMouseHandlerPrivate();
void suspend();
void resume();
private slots:
void readMouseData();
protected:
enum { mouseBufSize = 128 };
QWSBusMouseHandler *handler;
QSocketNotifier *mouseNotifier;
int mouseFD;
int mouseIdx;
int obstate;
uchar mouseBuf[mouseBufSize];
};
QWSBusMouseHandler::QWSBusMouseHandler(const QString &driver, const QString &device)
: QWSMouseHandler(driver, device)
{
d = new QWSBusMouseHandlerPrivate(this, driver, device);
}
QWSBusMouseHandler::~QWSBusMouseHandler()
{
delete d;
}
void QWSBusMouseHandler::suspend()
{
d->suspend();
}
void QWSBusMouseHandler::resume()
{
d->resume();
}
QWSBusMouseHandlerPrivate::QWSBusMouseHandlerPrivate(QWSBusMouseHandler *h,
const QString &, const QString &device)
: handler(h)
{
QString mouseDev = device;
if (mouseDev.isEmpty())
mouseDev = QLatin1String("/dev/mouse");
obstate = -1;
mouseFD = -1;
mouseFD = open(mouseDev.toLocal8Bit(), O_RDWR | O_NDELAY);
if (mouseFD < 0)
mouseFD = open(mouseDev.toLocal8Bit(), O_RDONLY | O_NDELAY);
if (mouseFD < 0)
qDebug("Cannot open %s (%s)", qPrintable(mouseDev), strerror(errno));
// Clear pending input
tcflush(mouseFD,TCIFLUSH);
usleep(50000);
char buf[100]; // busmouse driver will not read if bufsize < 3, YYD
while (read(mouseFD, buf, 100) > 0) { } // eat unwanted replies
mouseIdx = 0;
mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);
connect(mouseNotifier, SIGNAL(activated(int)),this, SLOT(readMouseData()));
}
QWSBusMouseHandlerPrivate::~QWSBusMouseHandlerPrivate()
{
if (mouseFD >= 0) {
tcflush(mouseFD,TCIFLUSH); // yyd.
close(mouseFD);
}
}
void QWSBusMouseHandlerPrivate::suspend()
{
mouseNotifier->setEnabled(false);
}
void QWSBusMouseHandlerPrivate::resume()
{
mouseIdx = 0;
obstate = -1;
mouseNotifier->setEnabled(true);
}
void QWSBusMouseHandlerPrivate::readMouseData()
{
int n;
// It'll only read 3 bytes a time and return all other buffer zeroed, thus cause protocol errors
for (;;) {
if (mouseBufSize - mouseIdx < 3)
break;
n = read(mouseFD, mouseBuf+mouseIdx, 3);
if (n != 3)
break;
mouseIdx += 3;
}
static const int accel_limit = 5;
static const int accel = 2;
int idx = 0;
int bstate = 0;
int dx = 0, dy = 0;
bool sendEvent = false;
int tdx = 0, tdy = 0;
while (mouseIdx-idx >= 3) {
#if 0 // debug
qDebug("Got mouse data");
#endif
uchar *mb = mouseBuf+idx;
bstate = 0;
dx = 0;
dy = 0;
sendEvent = false;
if (((mb[0] & 0x04)))
bstate |= Qt::LeftButton;
if (((mb[0] & 0x01)))
bstate |= Qt::RightButton;
dx=(signed char)mb[1];
dy=(signed char)mb[2];
sendEvent=true;
if (sendEvent) {
if (qAbs(dx) > accel_limit || qAbs(dy) > accel_limit) {
dx *= accel;
dy *= accel;
}
tdx += dx;
tdy += dy;
if (bstate != obstate) {
QPoint pos = handler->pos() + QPoint(tdx,-tdy);
handler->limitToScreen(pos);
handler->mouseChanged(pos,bstate);
sendEvent = false;
tdx = 0;
tdy = 0;
obstate = bstate;
}
}
idx += 3;
}
if (sendEvent) {
QPoint pos = handler->pos() + QPoint(tdx,-tdy);
handler->limitToScreen(pos);
handler->mouseChanged(pos,bstate);
}
int surplus = mouseIdx - idx;
for (int i = 0; i < surplus; i++)
mouseBuf[i] = mouseBuf[idx+i];
mouseIdx = surplus;
}
QT_END_NAMESPACE
#include "qmousebus_qws.moc"
#endif // QT_NO_QWS_MOUSE_BUS
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