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draglabel.cpp Example File
^{draganddrop/draggabletext/draglabel.cpp}

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 ** This file is part of the example classes of the Qt Toolkit.
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 #include <QtGui>

 #include "draglabel.h"

 DragLabel::DragLabel(const QString &text, QWidget *parent)
     : QLabel(text, parent)
 {
     setAutoFillBackground(true);
     setFrameShape(QFrame::Panel);
     setFrameShadow(QFrame::Raised);
 }

 void DragLabel::mousePressEvent(QMouseEvent *event)
 {
     QString plainText = text(); // for quoting purposes

     QMimeData *mimeData = new QMimeData;
     mimeData->setText(plainText);

     QDrag *drag = new QDrag(this);
     drag->setMimeData(mimeData);
     drag->setHotSpot(event->pos() - rect().topLeft());

     Qt::DropAction dropAction = drag->start(Qt::CopyAction | Qt::MoveAction);

     if (dropAction == Qt::MoveAction) {
         close();
         update();
     }
 }