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

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    ** This file is part of the documentation of the Qt Toolkit.
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    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
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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();
        }
    }