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<pre> /****************************************************************************
 **
 ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
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 ** This file is part of the example classes of the Qt Toolkit.
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 #include &lt;QtGui&gt;

 #include &quot;droparea.h&quot;

 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(&quot;&lt;drop content&gt;&quot;));
     setBackgroundRole(QPalette::Highlight);

     event-&gt;acceptProposedAction();
     emit changed(event-&gt;mimeData());
 }

 void DropArea::dragMoveEvent(QDragMoveEvent *event)
 {
     event-&gt;acceptProposedAction();
 }

 void DropArea::dropEvent(QDropEvent *event)
 {
     const QMimeData *mimeData = event-&gt;mimeData();

     if (mimeData-&gt;hasImage()) {
         setPixmap(qvariant_cast&lt;QPixmap&gt;(mimeData-&gt;imageData()));
     } else if (mimeData-&gt;hasHtml()) {
         setText(mimeData-&gt;html());
         setTextFormat(Qt::RichText);
     } else if (mimeData-&gt;hasText()) {
         setText(mimeData-&gt;text());
         setTextFormat(Qt::PlainText);
     } else {
         setText(tr(&quot;Cannot display data&quot;));
     }

     setBackgroundRole(QPalette::Dark);
     event-&gt;acceptProposedAction();
 }

 void DropArea::dragLeaveEvent(QDragLeaveEvent *event)
 {
     clear();
     event-&gt;accept();
 }

 void DropArea::clear()
 {
     setText(tr(&quot;&lt;drop content&gt;&quot;));
     setBackgroundRole(QPalette::Dark);

     emit changed();
 }

 QPixmap DropArea::extractPixmap(const QByteArray &amp;data, const QString &amp;format)
 {
     QList&lt;QByteArray&gt; imageFormats = QImageReader::supportedImageFormats();
     QPixmap pixmap;

     foreach (QByteArray imageFormat, imageFormats) {
         if (format.mid(6) == QString(imageFormat)) {
             pixmap.loadFromData(data, imageFormat);
             break;
         }
     }
     return pixmap;
 }</pre>
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