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Diffstat (limited to 'src/gui/embedded/qmouseqnx_qws.cpp')
| -rw-r--r-- | src/gui/embedded/qmouseqnx_qws.cpp | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/gui/embedded/qmouseqnx_qws.cpp b/src/gui/embedded/qmouseqnx_qws.cpp new file mode 100644 index 0000000000..cea3673d70 --- /dev/null +++ b/src/gui/embedded/qmouseqnx_qws.cpp @@ -0,0 +1,190 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qplatformdefs.h" +#include "qmouseqnx_qws.h" + +#include "qsocketnotifier.h" +#include "qdebug.h" + +#include <sys/dcmd_input.h> + +#include <errno.h> + +QT_BEGIN_NAMESPACE + +/*! + \class QQnxMouseHandler + \preliminary + \ingroup qws + \internal + \since 4.6 + + \brief The QQnxMouseHandler class implements a mouse driver + for the QNX \c{devi-hid} input manager. + + To be able to compile this mouse handler, \l{Qt for Embedded Linux} + must be configured with the \c -qt-mouse-qnx option, see the + \l{Qt for Embedded Linux Pointer Handling}{Pointer Handling} documentation for details. + + In order to use this mouse handler, the \c{devi-hid} input manager + must be set up and run with the resource manager interface (option \c{-r}). + Also, Photon must not be running. + + Example invocation from command line: \c{/usr/photon/bin/devi-hid -Pr kbd mouse} + Note that after running \c{devi-hid}, you will not be able to use the local + shell anymore. It is suggested to run the command in a shell scrip, that launches + a Qt application after invocation of \c{devi-hid}. + + To make \l{Qt for Embedded Linux} explicitly choose the qnx mouse + handler, set the QWS_MOUSE_PROTO environment variable to \c{qnx}. By default, + the first mouse device (\c{/dev/devi/mouse0}) is used. To override, pass a device + name as the first and only parameter, for example + \c{QWS_MOUSE_PROTO=qnx:/dev/devi/mouse1; export QWS_MOUSE_PROTO}. + + \sa {Qt for Embedded Linux Pointer Handling}{Pointer Handling}, {Qt for Embedded Linux} +*/ + +/*! + Constructs a mouse handler for the specified \a device, defaulting to \c{/dev/devi/mouse0}. + The \a driver parameter must be \c{"qnx"}. + + Note that you should never instanciate this class, instead let QMouseDriverFactory + handle the mouse handlers. + + \sa QMouseDriverFactory + */ +QQnxMouseHandler::QQnxMouseHandler(const QString & /*driver*/, const QString &device) +{ + // open the mouse device with O_NONBLOCK so reading won't block when there's no data + mouseFD = QT_OPEN(device.isEmpty() ? "/dev/devi/mouse0" : device.toLatin1().constData(), + QT_OPEN_RDONLY | O_NONBLOCK); + if (mouseFD == -1) { + qErrnoWarning(errno, "QQnxMouseHandler: Unable to open mouse device"); + return; + } + + // register a socket notifier on the file descriptor so we'll wake up whenever + // there's a mouse move waiting for us. + mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this); + connect(mouseNotifier, SIGNAL(activated(int)), SLOT(socketActivated())); + + qDebug() << "QQnxMouseHandler: connected."; +} + +/*! + Destroys this mouse handler and closes the connection to the mouse device. + */ +QQnxMouseHandler::~QQnxMouseHandler() +{ + QT_CLOSE(mouseFD); +} + +/*! \reimp */ +void QQnxMouseHandler::resume() +{ + if (mouseNotifier) + mouseNotifier->setEnabled(true); +} + +/*! \reimp */ +void QQnxMouseHandler::suspend() +{ + if (mouseNotifier) + mouseNotifier->setEnabled(false); +} + +/*! \internal + + This function is called whenever there is activity on the mouse device. + By default, it reads up to 10 mouse move packets and calls mouseChanged() + for each of them. +*/ +void QQnxMouseHandler::socketActivated() +{ + // _mouse_packet is a QNX structure. devi-hid is nice enough to translate + // the raw byte data from mouse devices into generic format for us. + _mouse_packet packet; + + int iteration = 0; + + // read mouse events in batches of 10. Since we're getting quite a lot + // of mouse events, it's better to do them in batches than to return to the + // event loop every time. + do { + int bytesRead = QT_READ(mouseFD, &packet, sizeof(packet)); + if (bytesRead == -1) { + // EAGAIN means that there are no more mouse events to read + if (errno != EAGAIN) + qErrnoWarning(errno, "QQnxMouseHandler: Unable to read from socket"); + return; + } + + // bytes read should always be equal to the size of a packet. + Q_ASSERT(bytesRead == sizeof(packet)); + + // translate the coordinates from the QNX data structure to Qt coordinates + // note the swapped y axis + QPoint pos = mousePos; + pos += QPoint(packet.dx, -packet.dy); + + // QNX only tells us relative mouse movements, not absolute ones, so limit the + // cursor position manually to the screen + limitToScreen(pos); + + // translate the QNX mouse button bitmask to Qt buttons + int buttons = Qt::NoButton; + + if (packet.hdr.buttons & _POINTER_BUTTON_LEFT) + buttons |= Qt::LeftButton; + if (packet.hdr.buttons & _POINTER_BUTTON_MIDDLE) + buttons |= Qt::MidButton; + if (packet.hdr.buttons & _POINTER_BUTTON_RIGHT) + buttons |= Qt::RightButton; + + // call mouseChanged() - this does all the magic to actually move the on-screen + // mouse cursor. + mouseChanged(pos, buttons, 0); + } while (++iteration < 11); +} + +QT_END_NAMESPACE + |