Long live Qt!

1 files changed, 217 insertions, 0 deletions

diff --git a/src/gui/kernel/qguieventdispatcher_glib.cpp b/src/gui/kernel/qguieventdispatcher_glib.cpp
new file mode 100644
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+++ b/src/gui/kernel/qguieventdispatcher_glib.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, 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 are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@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:
+
+    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