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/****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** 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 have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qguieventdispatcher_glib_p.h"
#include "qapplication.h"
#include "qx11info_x11.h"
#include "qt_x11_p.h"
#include <glib.h>
QT_BEGIN_NAMESPACE
struct GX11EventSource
{
GSource source;
GPollFD pollfd;
QEventLoop::ProcessEventsFlags flags;
QGuiEventDispatcherGlib *q;
QGuiEventDispatcherGlibPrivate *d;
};
class QGuiEventDispatcherGlibPrivate : public QEventDispatcherGlibPrivate
{
Q_DECLARE_PUBLIC(QGuiEventDispatcherGlib)
public:
QGuiEventDispatcherGlibPrivate();
GX11EventSource *x11EventSource;
QList<XEvent> queuedUserInputEvents;
};
static gboolean x11EventSourcePrepare(GSource *s, gint *timeout)
{
if (timeout)
*timeout = -1;
GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s);
return (XEventsQueued(X11->display, QueuedAfterFlush)
|| (!(source->flags & QEventLoop::ExcludeUserInputEvents)
&& !source->d->queuedUserInputEvents.isEmpty()));
}
static gboolean x11EventSourceCheck(GSource *s)
{
GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s);
return (XEventsQueued(X11->display, QueuedAfterFlush)
|| (!(source->flags & QEventLoop::ExcludeUserInputEvents)
&& !source->d->queuedUserInputEvents.isEmpty()));
}
static gboolean x11EventSourceDispatch(GSource *s, GSourceFunc callback, gpointer user_data)
{
GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s);
ulong marker = XNextRequest(X11->display);
do {
XEvent event;
if (!(source->flags & QEventLoop::ExcludeUserInputEvents)
&& !source->d->queuedUserInputEvents.isEmpty()) {
// process a pending user input event
event = source->d->queuedUserInputEvents.takeFirst();
} else if (XEventsQueued(X11->display, QueuedAlready)) {
// process events from the X server
XNextEvent(X11->display, &event);
if (source->flags & QEventLoop::ExcludeUserInputEvents) {
// queue user input events
switch (event.type) {
case ButtonPress:
case ButtonRelease:
case MotionNotify:
case XKeyPress:
case XKeyRelease:
case EnterNotify:
case LeaveNotify:
source->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;
}
}
source->d->queuedUserInputEvents.append(event);
continue;
default:
break;
}
}
} else {
// no event to process
break;
}
// send through event filter
if (source->q->filterEvent(&event))
continue;
if (qApp->x11ProcessEvent(&event) == 1)
return true;
if (event.xany.serial >= marker)
goto out;
} while (XEventsQueued(X11->display, QueuedAfterFlush));
out:
source->d->runTimersOnceWithNormalPriority();
if (callback)
callback(user_data);
return true;
}
static GSourceFuncs x11EventSourceFuncs = {
x11EventSourcePrepare,
x11EventSourceCheck,
x11EventSourceDispatch,
NULL,
NULL,
NULL
};
QGuiEventDispatcherGlibPrivate::QGuiEventDispatcherGlibPrivate()
{
x11EventSource = reinterpret_cast<GX11EventSource *>(g_source_new(&x11EventSourceFuncs,
sizeof(GX11EventSource)));
g_source_set_can_recurse(&x11EventSource->source, true);
memset(&x11EventSource->pollfd, 0, sizeof(GPollFD));
x11EventSource->flags = QEventLoop::AllEvents;
x11EventSource->q = 0;
x11EventSource->d = 0;
g_source_attach(&x11EventSource->source, mainContext);
}
QGuiEventDispatcherGlib::QGuiEventDispatcherGlib(QObject *parent)
: QEventDispatcherGlib(*new QGuiEventDispatcherGlibPrivate, parent)
{
}
QGuiEventDispatcherGlib::~QGuiEventDispatcherGlib()
{
Q_D(QGuiEventDispatcherGlib);
g_source_remove_poll(&d->x11EventSource->source, &d->x11EventSource->pollfd);
g_source_destroy(&d->x11EventSource->source);
d->x11EventSource = 0;
}
bool QGuiEventDispatcherGlib::processEvents(QEventLoop::ProcessEventsFlags flags)
{
Q_D(QGuiEventDispatcherGlib);
QEventLoop::ProcessEventsFlags saved_flags = d->x11EventSource->flags;
d->x11EventSource->flags = flags;
bool returnValue = QEventDispatcherGlib::processEvents(flags);
d->x11EventSource->flags = saved_flags;
return returnValue;
}
void QGuiEventDispatcherGlib::startingUp()
{
Q_D(QGuiEventDispatcherGlib);
d->x11EventSource->pollfd.fd = XConnectionNumber(X11->display);
d->x11EventSource->pollfd.events = G_IO_IN | G_IO_HUP | G_IO_ERR;
d->x11EventSource->q = this;
d->x11EventSource->d = d;
g_source_add_poll(&d->x11EventSource->source, &d->x11EventSource->pollfd);
}
QT_END_NAMESPACE
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