Long live Qt 4.5!

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diff --git a/src/gui/embedded/qwsembedwidget.cpp b/src/gui/embedded/qwsembedwidget.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 "qwsembedwidget.h"
+
+#ifndef QT_NO_QWSEMBEDWIDGET
+
+#include <qwsdisplay_qws.h>
+#include <private/qwidget_p.h>
+#include <private/qwsdisplay_qws_p.h>
+#include <private/qwscommand_qws_p.h>
+
+QT_BEGIN_NAMESPACE
+
+// TODO:
+// Must remove window decorations from the embedded window
+// Focus In/Out, Keyboard/Mouse...
+//
+// BUG: what if my parent change parent?
+
+class QWSEmbedWidgetPrivate : public QWidgetPrivate
+{
+    Q_DECLARE_PUBLIC(QWSEmbedWidget);
+
+public:
+    QWSEmbedWidgetPrivate(int winId);
+    void updateWindow();
+    void resize(const QSize &size);
+
+    QWidget *window;
+    WId windowId;
+    WId embeddedId;
+};
+
+QWSEmbedWidgetPrivate::QWSEmbedWidgetPrivate(int winId)
+    : window(0), windowId(0), embeddedId(winId)
+{
+}
+
+void QWSEmbedWidgetPrivate::updateWindow()
+{
+    Q_Q(QWSEmbedWidget);
+
+    QWidget *win = q->window();
+    if (win == window)
+        return;
+
+    if (window) {
+        window->removeEventFilter(q);
+        QWSEmbedCommand command;
+        command.setData(windowId, embeddedId, QWSEmbedEvent::StopEmbed);
+        QWSDisplay::instance()->d->sendCommand(command);
+    }
+
+    window = win;
+    if (!window)
+        return;
+    windowId = window->winId();
+
+    QWSEmbedCommand command;
+    command.setData(windowId, embeddedId, QWSEmbedEvent::StartEmbed);
+    QWSDisplay::instance()->d->sendCommand(command);
+    window->installEventFilter(q);
+    q->installEventFilter(q);
+}
+
+void QWSEmbedWidgetPrivate::resize(const QSize &size)
+{
+    if (!window)
+        return;
+
+    Q_Q(QWSEmbedWidget);
+
+    QWSEmbedCommand command;
+    command.setData(windowId, embeddedId, QWSEmbedEvent::Region,
+                    QRect(q->mapToGlobal(QPoint(0, 0)), size));
+    QWSDisplay::instance()->d->sendCommand(command);
+}
+
+/*!
+    \class QWSEmbedWidget
+    \since 4.2
+    \ingroup qws
+    \ingroup advanced
+
+    \brief The QWSEmbedWidget class enables embedded top-level widgets
+    in Qt for Embedded Linux.
+
+    Note that this class is only available in \l{Qt for Embedded Linux}.
+
+    QWSEmbedWidget inherits QWidget and acts as any other widget, but
+    in addition it is capable of embedding another top-level widget.
+
+    An example of use is when painting directly onto the screen using
+    the QDirectPainter class. Then the reserved region can be embedded
+    into an instance of the QWSEmbedWidget class, providing for
+    example event handling and size policies for the reserved region.
+
+    All that is required to embed a top-level widget is its window ID.
+
+    \sa {Qt for Embedded Linux Architecture}
+*/
+
+/*!
+    Constructs a widget with the given \a parent, embedding the widget
+    identified by the given window \a id.
+*/
+QWSEmbedWidget::QWSEmbedWidget(WId id, QWidget *parent)
+    : QWidget(*new QWSEmbedWidgetPrivate(id), parent, 0)
+{
+    Q_D(QWSEmbedWidget);
+    d->updateWindow();
+}
+
+/*!
+    Destroys this widget.
+*/
+QWSEmbedWidget::~QWSEmbedWidget()
+{
+    Q_D(QWSEmbedWidget);
+    if (!d->window)
+        return;
+
+    QWSEmbedCommand command;
+    command.setData(d->windowId, d->embeddedId, QWSEmbedEvent::StopEmbed);
+    QWSDisplay::instance()->d->sendCommand(command);
+}
+
+/*!
+    \reimp
+*/
+bool QWSEmbedWidget::eventFilter(QObject *object, QEvent *event)
+{
+    Q_D(QWSEmbedWidget);
+    if (object == d->window && event->type() == QEvent::Move)
+        resizeEvent(0);
+    else if (object == this && event->type() == QEvent::Hide)
+        d->resize(QSize());
+    return QWidget::eventFilter(object, event);
+}
+
+/*!
+    \reimp
+*/
+void QWSEmbedWidget::changeEvent(QEvent *event)
+{
+    Q_D(QWSEmbedWidget);
+    if (event->type() == QEvent::ParentChange)
+        d->updateWindow();
+}
+
+/*!
+    \reimp
+*/
+void QWSEmbedWidget::resizeEvent(QResizeEvent*)
+{
+    Q_D(QWSEmbedWidget);
+    d->resize(rect().size());
+}
+
+/*!
+    \reimp
+*/
+void QWSEmbedWidget::moveEvent(QMoveEvent*)
+{
+    resizeEvent(0);
+}
+
+/*!
+    \reimp
+*/
+void QWSEmbedWidget::hideEvent(QHideEvent*)
+{
+    Q_D(QWSEmbedWidget);
+    d->resize(QSize());
+}
+
+/*!
+    \reimp
+*/
+void QWSEmbedWidget::showEvent(QShowEvent*)
+{
+    Q_D(QWSEmbedWidget);
+    d->resize(rect().size());
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_QWSEMBEDWIDGET