Qt 4.0: draglabel.cpp Example File (draganddrop/draggabletext/draglabel.cpp)

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# draglabel.cpp Example File
draganddrop/draggabletext/draglabel.cpp

        /****************************************************************************
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        ** Copyright (C) 2005-2005 Trolltech AS. All rights reserved.
        **
        ** 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
    ** this file.  Please review the following information to ensure GNU
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        #include <QtGui>

        #include "draglabel.h"

        DragLabel::DragLabel(const QString &text, QWidget *parent)
            : QLabel(text, parent)
        {
            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();
            }
        }