draglabel.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** 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
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#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();
    }
}