draglabel.cpp

奇趣公司比较新的qt/emd版本

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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)
{
    QPoint hotSpot = event->pos();

    QMimeData *mimeData = new QMimeData;
    mimeData->setText(text());
    mimeData->setData("application/x-hotspot",
                      QByteArray::number(hotSpot.x())
                      + " " + QByteArray::number(hotSpot.y()));

    QPixmap pixmap(size());
    render(&pixmap);

    QDrag *drag = new QDrag(this);
    drag->setMimeData(mimeData);
    drag->setPixmap(pixmap);
    drag->setHotSpot(hotSpot);

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

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