/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qwsembedwidget.h"+
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+
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#ifndef QT_NO_QWSEMBEDWIDGET+
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+
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#include <qwsdisplay_qws.h>+
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#include <private/qwidget_p.h>+
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#include <private/qwsdisplay_qws_p.h>+
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#include <private/qwscommand_qws_p.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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// TODO:+
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// Must remove window decorations from the embedded window+
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// Focus In/Out, Keyboard/Mouse...+
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//+
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// BUG: what if my parent change parent?+
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+
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class QWSEmbedWidgetPrivate : public QWidgetPrivate+
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{+
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    Q_DECLARE_PUBLIC(QWSEmbedWidget);+
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+
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public:+
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    QWSEmbedWidgetPrivate(int winId);+
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    void updateWindow();+
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    void resize(const QSize &size);+
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+
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    QWidget *window;+
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    WId windowId;+
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    WId embeddedId;+
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};+
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+
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QWSEmbedWidgetPrivate::QWSEmbedWidgetPrivate(int winId)+
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    : window(0), windowId(0), embeddedId(winId)+
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{+
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}+
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+
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void QWSEmbedWidgetPrivate::updateWindow()+
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{+
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    Q_Q(QWSEmbedWidget);+
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+
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    QWidget *win = q->window();+
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    if (win == window)+
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        return;+
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+
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    if (window) {+
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        window->removeEventFilter(q);+
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        QWSEmbedCommand command;+
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        command.setData(windowId, embeddedId, QWSEmbedEvent::StopEmbed);+
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        QWSDisplay::instance()->d->sendCommand(command);+
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    }+
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+
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    window = win;+
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    if (!window)+
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        return;+
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    windowId = window->winId();+
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+
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    QWSEmbedCommand command;+
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    command.setData(windowId, embeddedId, QWSEmbedEvent::StartEmbed);+
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    QWSDisplay::instance()->d->sendCommand(command);+
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    window->installEventFilter(q);+
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    q->installEventFilter(q);+
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}+
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+
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void QWSEmbedWidgetPrivate::resize(const QSize &size)+
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{+
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    if (!window)+
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        return;+
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+
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    Q_Q(QWSEmbedWidget);+
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+
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    QWSEmbedCommand command;+
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    command.setData(windowId, embeddedId, QWSEmbedEvent::Region,+
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                    QRect(q->mapToGlobal(QPoint(0, 0)), size));+
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    QWSDisplay::instance()->d->sendCommand(command);+
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}+
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+
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/*!+
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    \class QWSEmbedWidget+
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    \since 4.2+
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    \ingroup qws+
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    \ingroup advanced+
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+
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    \brief The QWSEmbedWidget class enables embedded top-level widgets+
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    in Qt for Embedded Linux.+
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+
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    Note that this class is only available in \l{Qt for Embedded Linux}.+
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+
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    QWSEmbedWidget inherits QWidget and acts as any other widget, but+
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    in addition it is capable of embedding another top-level widget.+
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+
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    An example of use is when painting directly onto the screen using+
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    the QDirectPainter class. Then the reserved region can be embedded+
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    into an instance of the QWSEmbedWidget class, providing for+
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    example event handling and size policies for the reserved region.+
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+
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    All that is required to embed a top-level widget is its window ID.+
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+
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    \sa {Qt for Embedded Linux Architecture}+
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*/+
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+
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/*!+
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    Constructs a widget with the given \a parent, embedding the widget+
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    identified by the given window \a id.+
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*/+
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QWSEmbedWidget::QWSEmbedWidget(WId id, QWidget *parent)+
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    : QWidget(*new QWSEmbedWidgetPrivate(id), parent, 0)+
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{+
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    Q_D(QWSEmbedWidget);+
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    d->updateWindow();+
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}+
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+
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/*!+
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    Destroys this widget.+
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*/+
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QWSEmbedWidget::~QWSEmbedWidget()+
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{+
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    Q_D(QWSEmbedWidget);+
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    if (!d->window)+
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        return;+
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+
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    QWSEmbedCommand command;+
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    command.setData(d->windowId, d->embeddedId, QWSEmbedEvent::StopEmbed);+
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    QWSDisplay::instance()->d->sendCommand(command);+
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}+
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+
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/*!+
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    \reimp+
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*/+
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bool QWSEmbedWidget::eventFilter(QObject *object, QEvent *event)+
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{+
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    Q_D(QWSEmbedWidget);+
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    if (object == d->window && event->type() == QEvent::Move)+
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        resizeEvent(0);+
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    else if (object == this && event->type() == QEvent::Hide)+
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        d->resize(QSize());+
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    return QWidget::eventFilter(object, event);+
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}+
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+
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/*!+
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    \reimp+
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*/+
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void QWSEmbedWidget::changeEvent(QEvent *event)+
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{+
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    Q_D(QWSEmbedWidget);+
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    if (event->type() == QEvent::ParentChange)+
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        d->updateWindow();+
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}+
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+
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/*!+
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    \reimp+
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*/+
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void QWSEmbedWidget::resizeEvent(QResizeEvent*)+
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{+
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    Q_D(QWSEmbedWidget);+
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    d->resize(rect().size());+
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}+
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+
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/*!+
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    \reimp+
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*/+
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void QWSEmbedWidget::moveEvent(QMoveEvent*)+
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{+
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    resizeEvent(0);+
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}+
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+
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/*!+
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    \reimp+
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*/+
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void QWSEmbedWidget::hideEvent(QHideEvent*)+
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{+
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    Q_D(QWSEmbedWidget);+
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    d->resize(QSize());+
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}+
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+
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/*!+
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    \reimp+
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*/+
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void QWSEmbedWidget::showEvent(QShowEvent*)+
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{+
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    Q_D(QWSEmbedWidget);+
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    d->resize(rect().size());+
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}+
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+
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QT_END_NAMESPACE+
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+
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#endif // QT_NO_QWSEMBEDWIDGET+
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