/****************************************************************************

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the Qt Designer of the Qt Toolkit.

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** $QT_BEGIN_LICENSE:LGPL$

** 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 Technology Preview License Agreement accompanying

** this package.

**

** 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.

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** If you have questions regarding the use of this file, please contact

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** $QT_END_LICENSE$

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****************************************************************************/

#include "previewframe.h"

#include "previewwidget.h"

#include <QtCore/QCoreApplication>

#include <QtCore/QDebug>

#include <QtGui/QPainter>

#include <QtGui/QMdiArea>

#include <QtGui/QMdiSubWindow>

#include <QtGui/QPaintEvent>

QT_BEGIN_NAMESPACE

namespace qdesigner_internal {

    class PreviewMdiArea: public QMdiArea {

    public:

        PreviewMdiArea(QWidget *parent = 0) : QMdiArea(parent) {}

    protected:

        bool viewportEvent ( QEvent * event );

    };

    bool PreviewMdiArea::viewportEvent (QEvent * event) {

        if (event->type() != QEvent::Paint)

            return QMdiArea::viewportEvent (event);

        QWidget *paintWidget = viewport();

        QPainter p(paintWidget);

        p.fillRect(rect(), paintWidget->palette().color(backgroundRole()).dark());

        p.setPen(QPen(Qt::white));

        //: Palette editor background

        p.drawText(0, height() / 2,  width(), height(), Qt::AlignHCenter,

                   QCoreApplication::translate("qdesigner_internal::PreviewMdiArea", "The moose in the noose\nate the goose who was loose."));

        return true;

    }

PreviewFrame::PreviewFrame(QWidget *parent) :

    QFrame(parent),

    m_mdiArea(new PreviewMdiArea(this))

{

    m_mdiArea->setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);

    m_mdiArea->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);

    setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);

    setLineWidth(1);

    QVBoxLayout *vbox = new QVBoxLayout(this);

    vbox->setMargin(0);

    vbox->addWidget(m_mdiArea);

    setMinimumSize(ensureMdiSubWindow()->minimumSizeHint());

}

void PreviewFrame::setPreviewPalette(const QPalette &pal)

{

    ensureMdiSubWindow()->widget()->setPalette(pal);

}

void PreviewFrame::setSubWindowActive(bool active)

{

    m_mdiArea->setActiveSubWindow (active ? ensureMdiSubWindow() : static_cast<QMdiSubWindow *>(0));

}

QMdiSubWindow *PreviewFrame::ensureMdiSubWindow()

{

    if (!m_mdiSubWindow) {

        PreviewWidget *previewWidget = new PreviewWidget(m_mdiArea);

        m_mdiSubWindow = m_mdiArea->addSubWindow(previewWidget, Qt::WindowTitleHint | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint);

        m_mdiSubWindow->move(10,10);

        m_mdiSubWindow->showMaximized();

    }

    const Qt::WindowStates state = m_mdiSubWindow->windowState();

    if (state & Qt::WindowMinimized)

        m_mdiSubWindow->setWindowState(state & ~Qt::WindowMinimized);

    return m_mdiSubWindow;

}

}

QT_END_NAMESPACE