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

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

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

**

** This file is part of the documentation 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 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.

**

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

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include <QtGui>

#include "droparea.h"

DropArea::DropArea(QWidget *parent)

    : QLabel(parent)

{

    setMinimumSize(200, 200);

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

    setAlignment(Qt::AlignCenter);

    setAcceptDrops(true);

    setAutoFillBackground(true);

    clear();

}

void DropArea::dragEnterEvent(QDragEnterEvent *event)

{

    setText(tr("<drop content>"));

    setBackgroundRole(QPalette::Highlight);

    event->acceptProposedAction();

    emit changed(event->mimeData());

}

void DropArea::dragMoveEvent(QDragMoveEvent *event)

{

    event->acceptProposedAction();

}

void DropArea::dropEvent(QDropEvent *event)

{

    const QMimeData *mimeData = event->mimeData();

    if (mimeData->hasImage()) {

        setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));

    } else if (mimeData->hasHtml()) {

        setText(mimeData->html());

        setTextFormat(Qt::RichText);

    } else if (mimeData->hasText()) {

        setText(mimeData->text());

        setTextFormat(Qt::PlainText);

    } else {

        setText(tr("Cannot display data"));

    }

    setBackgroundRole(QPalette::Dark);

    event->acceptProposedAction();

}

//![0]

void DropArea::paste()

{

    const QClipboard *clipboard = QApplication::clipboard();

    const QMimeData *mimeData = clipboard->mimeData();

    if (mimeData->hasImage()) {

        setPixmap(qvariant_cast<QPixmap>(mimeData->imageData()));

    } else if (mimeData->hasHtml()) {

        setText(mimeData->html());

        setTextFormat(Qt::RichText);

    } else if (mimeData->hasText()) {

        setText(mimeData->text());

        setTextFormat(Qt::PlainText);

    } else {

        setText(tr("Cannot display data"));

    }

//![0]

    emit changed(mimeData);

    setBackgroundRole(QPalette::Dark);

    //event->acceptProposedAction();

}

void DropArea::dragLeaveEvent(QDragLeaveEvent *event)

{

    clear();

    event->accept();

}

void DropArea::clear()

{

    setText(tr("<drop content>"));

    setBackgroundRole(QPalette::Dark);

    emit changed();

}

QPixmap DropArea::extractPixmap(const QByteArray &data, const QString &format)

{

    QList<QByteArray> imageFormats = QImageReader::supportedImageFormats();

    QPixmap pixmap;

    foreach (QByteArray imageFormat, imageFormats) {

        if (format.mid(6) == QString(imageFormat)) {

            pixmap.loadFromData(data, imageFormat);

            break;

        }

    }

    return pixmap;

}