1 files changed, 139 insertions, 0 deletions
diff --git a/doc/src/snippets/droparea.cpp b/doc/src/snippets/droparea.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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::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;
+}