Long live Qt 4.5!

1 files changed, 136 insertions, 0 deletions

diff --git a/src/corelib/kernel/qwineventnotifier_p.cpp b/src/corelib/kernel/qwineventnotifier_p.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 QtCore 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 "qwineventnotifier_p.h"
+
+#include "qeventdispatcher_win_p.h"
+#include "qcoreapplication.h"
+
+#include <private/qthread_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*
+    \class QWinEventNotifier
+    \brief The QWinEventNotifier class provides support for the Windows Wait functions.
+
+    \ingroup io
+
+    The QWinEventNotifier class makes it possible to use the wait
+    functions on windows in a asynchronous manner. With this class
+    you can register a HANDLE to an event and get notification when
+    that event becomes signalled. The state of the event is not modified
+    in the process so if it is a manual reset event you will need to
+    reset it after the notification.
+*/
+
+
+QWinEventNotifier::QWinEventNotifier(QObject *parent)
+  : QObject(parent), handleToEvent(0), enabled(false)
+{}
+
+QWinEventNotifier::QWinEventNotifier(HANDLE hEvent, QObject *parent)
+ : QObject(parent), handleToEvent(hEvent), enabled(false)
+{
+    Q_D(QObject);
+    QEventDispatcherWin32 *eventDispatcher = qobject_cast<QEventDispatcherWin32 *>(d->threadData->eventDispatcher);
+    Q_ASSERT_X(eventDispatcher, "QWinEventNotifier::QWinEventNotifier()",
+               "Cannot create a win event notifier without a QEventDispatcherWin32");
+    eventDispatcher->registerEventNotifier(this);
+    enabled = true;
+}
+
+QWinEventNotifier::~QWinEventNotifier()
+{
+    setEnabled(false);
+}
+
+void QWinEventNotifier::setHandle(HANDLE hEvent)
+{
+    setEnabled(false);
+    handleToEvent = hEvent;
+}
+
+HANDLE  QWinEventNotifier::handle() const
+{
+    return handleToEvent;
+}
+
+bool QWinEventNotifier::isEnabled() const
+{
+    return enabled;
+}
+
+void QWinEventNotifier::setEnabled(bool enable)
+{
+    if (enabled == enable)                        // no change
+        return;
+    enabled = enable;
+
+    Q_D(QObject);
+    QEventDispatcherWin32 *eventDispatcher = qobject_cast<QEventDispatcherWin32 *>(d->threadData->eventDispatcher);
+    if (!eventDispatcher) // perhaps application is shutting down
+        return;
+
+    if (enabled)
+        eventDispatcher->registerEventNotifier(this);
+    else
+        eventDispatcher->unregisterEventNotifier(this);
+}
+
+bool QWinEventNotifier::event(QEvent * e)
+{
+    if (e->type() == QEvent::ThreadChange) {
+        if (enabled) {
+            QMetaObject::invokeMethod(this, "setEnabled", Qt::QueuedConnection,
+                                      Q_ARG(bool, enabled));
+            setEnabled(false);
+        }
+    }
+    QObject::event(e);                        // will activate filters
+    if (e->type() == QEvent::WinEventAct) {
+        emit activated(handleToEvent);
+        return true;
+    }
+    return false;
+}
+
+QT_END_NAMESPACE