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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 examples 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 <QtGui>
+
+#include "droparea.h"
+
+//! [DropArea constructor]
+DropArea::DropArea(QWidget *parent)
+ : QLabel(parent)
+{
+ setMinimumSize(200, 200);
+ setFrameStyle(QFrame::Sunken | QFrame::StyledPanel);
+ setAlignment(Qt::AlignCenter);
+ setAcceptDrops(true);
+ setAutoFillBackground(true);
+ clear();
+}
+//! [DropArea constructor]
+
+//! [dragEnterEvent() function]
+void DropArea::dragEnterEvent(QDragEnterEvent *event)
+{
+ setText(tr("<drop content>"));
+ setBackgroundRole(QPalette::Highlight);
+
+ event->acceptProposedAction();
+ emit changed(event->mimeData());
+}
+//! [dragEnterEvent() function]
+
+//! [dragMoveEvent() function]
+void DropArea::dragMoveEvent(QDragMoveEvent *event)
+{
+ event->acceptProposedAction();
+}
+//! [dragMoveEvent() function]
+
+//! [dropEvent() function part1]
+void DropArea::dropEvent(QDropEvent *event)
+{
+ const QMimeData *mimeData = event->mimeData();
+//! [dropEvent() function part1]
+
+//! [dropEvent() function part2]
+ 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 if (mimeData->hasUrls()) {
+ QList<QUrl> urlList = mimeData->urls();
+ QString text;
+ for (int i = 0; i < urlList.size() && i < 32; ++i) {
+ QString url = urlList.at(i).path();
+ text += url + QString("\n");
+ }
+ setText(text);
+ } else {
+ setText(tr("Cannot display data"));
+ }
+//! [dropEvent() function part2]
+
+//! [dropEvent() function part3]
+ setBackgroundRole(QPalette::Dark);
+ event->acceptProposedAction();
+}
+//! [dropEvent() function part3]
+
+//! [dragLeaveEvent() function]
+void DropArea::dragLeaveEvent(QDragLeaveEvent *event)
+{
+ clear();
+ event->accept();
+}
+//! [dragLeaveEvent() function]
+
+//! [clear() function]
+void DropArea::clear()
+{
+ setText(tr("<drop content>"));
+ setBackgroundRole(QPalette::Dark);
+
+ emit changed();
+}
+//! [clear() function]