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 #include &lt;QtGui&gt;
 #include &lt;QtSvg&gt;
 #include &quot;mimedata.h&quot;
 #include &quot;sourcewidget.h&quot;

 SourceWidget::SourceWidget(QWidget *parent)
     : QWidget(parent)
 {
     QFile imageFile(&quot;:/images/example.svg&quot;);
     imageFile.open(QIODevice::ReadOnly);
     imageData = imageFile.readAll();
     imageFile.close();

     QScrollArea *imageArea = new QScrollArea;
     imageLabel = new QSvgWidget;
     imageLabel-&gt;renderer()-&gt;load(imageData);
     imageArea-&gt;setWidget(imageLabel);
     <span class="comment">//imageLabel-&gt;setMinimumSize(imageLabel-&gt;renderer()-&gt;viewBox().size());</span>

     QLabel *instructTopLabel = new QLabel(tr(&quot;This is an SVG drawing:&quot;));
     QLabel *instructBottomLabel = new QLabel(
         tr(&quot;Drag the icon to copy the drawing as a PNG file:&quot;));
     QPushButton *dragIcon = new QPushButton(tr(&quot;Export&quot;));
     dragIcon-&gt;setIcon(QIcon(&quot;:/images/drag.png&quot;));

     connect(dragIcon, SIGNAL(pressed()), this, SLOT(startDrag()));

     QGridLayout *layout = new QGridLayout;
     layout-&gt;addWidget(instructTopLabel, 0, 0, 1, 2);
     layout-&gt;addWidget(imageArea, 1, 0, 2, 2);
     layout-&gt;addWidget(instructBottomLabel, 3, 0);
     layout-&gt;addWidget(dragIcon, 3, 1);
     setLayout(layout);
     setWindowTitle(tr(&quot;Delayed Encoding&quot;));
 }

 void SourceWidget::createData(const QString &amp;mimeType)
 {
     if (mimeType != &quot;image/png&quot;)
         return;

     QImage image(imageLabel-&gt;size(), QImage::Format_RGB32);
     QPainter painter;
     painter.begin(&amp;image);
     imageLabel-&gt;renderer()-&gt;render(&amp;painter);
     painter.end();

     QByteArray data;
     QBuffer buffer(&amp;data);
     buffer.open(QIODevice::WriteOnly);
     image.save(&amp;buffer, &quot;PNG&quot;);
     buffer.close();

     mimeData-&gt;setData(&quot;image/png&quot;, data);
 }

 void SourceWidget::startDrag()
 {
     mimeData = new MimeData;

     connect(mimeData, SIGNAL(dataRequested(QString)),
             this, SLOT(createData(QString)), Qt::DirectConnection);

     QDrag *drag = new QDrag(this);
     drag-&gt;setMimeData(mimeData);
     drag-&gt;setPixmap(QPixmap(&quot;:/images/drag.png&quot;));

     drag-&gt;exec(Qt::CopyAction);
 }</pre>
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