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/***************************************************************************
**
** Copyright (C) 2011 - 2012 Research In Motion
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qqnxglobal.h"
#include "qqnxscreeneventthread.h"
#include "qqnxscreeneventhandler.h"
#include <QtCore/QDebug>
#include <errno.h>
#include <unistd.h>
#include <cctype>
#if defined(QQNXSCREENEVENTTHREAD_DEBUG)
#define qScreenEventThreadDebug qDebug
#else
#define qScreenEventThreadDebug QT_NO_QDEBUG_MACRO
#endif
QQnxScreenEventThread::QQnxScreenEventThread(screen_context_t context, QQnxScreenEventHandler *screenEventHandler)
: QThread(),
m_screenContext(context),
m_screenEventHandler(screenEventHandler),
m_quit(false)
{
screenEventHandler->setScreenEventThread(this);
connect(this, SIGNAL(eventPending()), screenEventHandler, SLOT(processEventsFromScreenThread()), Qt::QueuedConnection);
connect(this, SIGNAL(finished()), screenEventHandler, SLOT(processEventsFromScreenThread()), Qt::QueuedConnection);
}
QQnxScreenEventThread::~QQnxScreenEventThread()
{
// block until thread terminates
shutdown();
}
void QQnxScreenEventThread::injectKeyboardEvent(int flags, int sym, int mod, int scan, int cap)
{
QQnxScreenEventHandler::injectKeyboardEvent(flags, sym, mod, scan, cap);
}
QQnxScreenEventArray *QQnxScreenEventThread::lock()
{
m_mutex.lock();
return &m_events;
}
void QQnxScreenEventThread::unlock()
{
m_mutex.unlock();
}
void QQnxScreenEventThread::run()
{
qScreenEventThreadDebug("screen event thread started");
int errorCounter = 0;
// loop indefinitely
while (!m_quit) {
screen_event_t event;
// create screen event
Q_SCREEN_CHECKERROR(screen_create_event(&event), "Failed to create screen event");
// block until screen event is available
const int error = screen_get_event(m_screenContext, event, -1);
Q_SCREEN_CRITICALERROR(error, "Failed to get screen event");
// Only allow 50 consecutive errors before we exit the thread
if (error) {
errorCounter++;
if (errorCounter > 50)
m_quit = true;
screen_destroy_event(event);
continue;
} else {
errorCounter = 0;
}
// process received event
// get the event type
int qnxType;
Q_SCREEN_CHECKERROR(screen_get_event_property_iv(event, SCREEN_PROPERTY_TYPE, &qnxType),
"Failed to query screen event type");
if (qnxType == SCREEN_EVENT_USER) {
// treat all user events as shutdown requests
qScreenEventThreadDebug("QNX user screen event");
m_quit = true;
} else {
m_mutex.lock();
m_events << event;
m_mutex.unlock();
emit eventPending();
}
}
qScreenEventThreadDebug("screen event thread stopped");
// cleanup
m_mutex.lock();
Q_FOREACH (screen_event_t event, m_events) {
screen_destroy_event(event);
}
m_events.clear();
m_mutex.unlock();
}
void QQnxScreenEventThread::shutdown()
{
screen_event_t event;
// create screen event
Q_SCREEN_CHECKERROR(screen_create_event(&event),
"Failed to create screen event");
// set the event type as user
int type = SCREEN_EVENT_USER;
Q_SCREEN_CHECKERROR(screen_set_event_property_iv(event, SCREEN_PROPERTY_TYPE, &type),
"Failed to set screen type");
// NOTE: ignore SCREEN_PROPERTY_USER_DATA; treat all user events as shutdown events
// post event to event loop so it will wake up and die
Q_SCREEN_CHECKERROR(screen_send_event(m_screenContext, event, getpid()),
"Failed to set screen event type");
// cleanup
screen_destroy_event(event);
qScreenEventThreadDebug("screen event thread shutdown begin");
// block until thread terminates
wait();
qScreenEventThreadDebug("screen event thread shutdown end");
}
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