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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qeventdispatcher_x11_p.h"
#include "qapplication.h"
#include "qx11info_x11.h"
#include "qt_x11_p.h"
#include <private/qeventdispatcher_unix_p.h>
QT_BEGIN_NAMESPACE
class QEventDispatcherX11Private : public QEventDispatcherUNIXPrivate
{
Q_DECLARE_PUBLIC(QEventDispatcherX11)
public:
inline QEventDispatcherX11Private()
: xfd(-1)
{ }
int xfd;
QList<XEvent> queuedUserInputEvents;
};
QEventDispatcherX11::QEventDispatcherX11(QObject *parent)
: QEventDispatcherUNIX(*new QEventDispatcherX11Private, parent)
{ }
QEventDispatcherX11::~QEventDispatcherX11()
{ }
bool QEventDispatcherX11::processEvents(QEventLoop::ProcessEventsFlags flags)
{
Q_D(QEventDispatcherX11);
d->interrupt = false;
QApplication::sendPostedEvents();
ulong marker = XNextRequest(X11->display);
int nevents = 0;
do {
while (!d->interrupt) {
XEvent event;
if (!(flags & QEventLoop::ExcludeUserInputEvents)
&& !d->queuedUserInputEvents.isEmpty()) {
// process a pending user input event
event = d->queuedUserInputEvents.takeFirst();
} else if (XEventsQueued(X11->display, QueuedAlready)) {
// process events from the X server
XNextEvent(X11->display, &event);
if (flags & QEventLoop::ExcludeUserInputEvents) {
// queue user input events
switch (event.type) {
case ButtonPress:
case ButtonRelease:
case MotionNotify:
case XKeyPress:
case XKeyRelease:
case EnterNotify:
case LeaveNotify:
d->queuedUserInputEvents.append(event);
continue;
case ClientMessage:
// only keep the wm_take_focus and
// _qt_scrolldone protocols, queue all other
// client messages
if (event.xclient.format == 32) {
if (event.xclient.message_type == ATOM(WM_PROTOCOLS) &&
(Atom) event.xclient.data.l[0] == ATOM(WM_TAKE_FOCUS)) {
break;
} else if (event.xclient.message_type == ATOM(_QT_SCROLL_DONE)) {
break;
}
}
d->queuedUserInputEvents.append(event);
continue;
default:
break;
}
}
} else {
// no event to process
break;
}
// send through event filter
if (filterEvent(&event))
continue;
nevents++;
if (qApp->x11ProcessEvent(&event) == 1)
return true;
if (event.xany.serial >= marker) {
if (XEventsQueued(X11->display, QueuedAfterFlush))
flags &= ~QEventLoop::WaitForMoreEvents;
goto out;
}
}
} while (!d->interrupt && XEventsQueued(X11->display, QueuedAfterFlush));
out:
if (!d->interrupt) {
const uint exclude_all =
QEventLoop::ExcludeSocketNotifiers | QEventLoop::X11ExcludeTimers | QEventLoop::WaitForMoreEvents;
if (nevents > 0 && ((uint)flags & exclude_all) == exclude_all) {
QApplication::sendPostedEvents();
return nevents > 0;
}
// return true if we handled events, false otherwise
return QEventDispatcherUNIX::processEvents(flags) || (nevents > 0);
}
return nevents > 0;
}
bool QEventDispatcherX11::hasPendingEvents()
{
extern uint qGlobalPostedEventsCount(); // from qapplication.cpp
return (qGlobalPostedEventsCount() || XPending(X11->display));
}
void QEventDispatcherX11::flush()
{
XFlush(X11->display);
}
void QEventDispatcherX11::startingUp()
{
Q_D(QEventDispatcherX11);
d->xfd = XConnectionNumber(X11->display);
}
void QEventDispatcherX11::closingDown()
{
Q_D(QEventDispatcherX11);
d->xfd = -1;
}
int QEventDispatcherX11::select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
timeval *timeout)
{
Q_D(QEventDispatcherX11);
if (d->xfd > 0) {
nfds = qMax(nfds - 1, d->xfd) + 1;
FD_SET(d->xfd, readfds);
}
return QEventDispatcherUNIX::select(nfds, readfds, writefds, exceptfds, timeout);
}
QT_END_NAMESPACE
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