src/gui/kernel/qeventdispatcher_qws.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 19 Feb 2010 23:40:16 +0200
branchRCL_3
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Revision: 201003 Kit: 201007
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/****************************************************************************
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**
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** Copyright (C) 2010 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 QtGui module 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 "qplatformdefs.h"
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#include "qapplication.h"
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#include "private/qwscommand_qws_p.h"
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#include "qwsdisplay_qws.h"
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#include "qwsevent_qws.h"
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#include "qwindowsystem_qws.h"
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#include "qeventdispatcher_qws_p.h"
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#include "private/qeventdispatcher_unix_p.h"
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#ifndef QT_NO_THREAD
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#  include "qmutex.h"
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#endif
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#include <errno.h>
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QT_BEGIN_NAMESPACE
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QT_USE_NAMESPACE
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class QEventDispatcherQWSPrivate : public QEventDispatcherUNIXPrivate
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{
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    Q_DECLARE_PUBLIC(QEventDispatcherQWS)
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public:
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    inline QEventDispatcherQWSPrivate()
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    { }
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    QList<QWSEvent*> queuedUserInputEvents;
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};
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QEventDispatcherQWS::QEventDispatcherQWS(QObject *parent)
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    : QEventDispatcherUNIX(*new QEventDispatcherQWSPrivate, parent)
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{ }
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QEventDispatcherQWS::~QEventDispatcherQWS()
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{ }
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// from qapplication_qws.cpp
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extern QWSDisplay* qt_fbdpy; // QWS `display'
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//#define ZERO_FOR_THE_MOMENT
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bool QEventDispatcherQWS::processEvents(QEventLoop::ProcessEventsFlags flags)
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{
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    Q_D(QEventDispatcherQWS);
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    // process events from the QWS server
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    int           nevents = 0;
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    // handle gui and posted events
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    d->interrupt = false;
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    QApplication::sendPostedEvents();
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    while (!d->interrupt) {        // also flushes output buffer ###can be optimized
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        QWSEvent *event;
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        if (!(flags & QEventLoop::ExcludeUserInputEvents)
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            && !d->queuedUserInputEvents.isEmpty()) {
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            // process a pending user input event
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            event = d->queuedUserInputEvents.takeFirst();
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        } else if  (qt_fbdpy->eventPending()) {
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            event = qt_fbdpy->getEvent();        // get next event
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             if (flags & QEventLoop::ExcludeUserInputEvents) {
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                 // queue user input events
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                 if (event->type == QWSEvent::Mouse || event->type == QWSEvent::Key) {
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                      d->queuedUserInputEvents.append(event);
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                        continue;
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                 }
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             }
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        } else {
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            break;
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        }
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        if (filterEvent(event)) {
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            delete event;
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            continue;
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        }
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        nevents++;
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        bool ret = qApp->qwsProcessEvent(event) == 1;
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        delete event;
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        if (ret) {
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            return true;
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        }
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    }
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    if (!d->interrupt) {
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        extern QList<QWSCommand*> *qt_get_server_queue();
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        if (!qt_get_server_queue()->isEmpty()) {
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            QWSServer::processEventQueue();
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        }
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        if (QEventDispatcherUNIX::processEvents(flags))
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            return true;
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    }
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    return (nevents > 0);
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}
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bool QEventDispatcherQWS::hasPendingEvents()
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{
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    extern uint qGlobalPostedEventsCount(); // from qapplication.cpp
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    return qGlobalPostedEventsCount() || qt_fbdpy->eventPending();
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}
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void QEventDispatcherQWS::startingUp()
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{
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}
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void QEventDispatcherQWS::closingDown()
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{
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}
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void QEventDispatcherQWS::flush()
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{
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    if(qApp)
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        qApp->sendPostedEvents();
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    (void)qt_fbdpy->eventPending(); // flush
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}
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int QEventDispatcherQWS::select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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                                timeval *timeout)
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{
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    return QEventDispatcherUNIX::select(nfds, readfds, writefds, exceptfds, timeout);
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}
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QT_END_NAMESPACE