puzzle.py 文件源码

def startDrag(self, supportedActions):
        item = self.currentItem()

        itemData = QByteArray()
        dataStream = QDataStream(itemData, QIODevice.WriteOnly)
        pixmap = QPixmap(item.data(Qt.UserRole))
        location = item.data(Qt.UserRole+1)

        dataStream << pixmap << location

        mimeData = QMimeData()
        mimeData.setData('image/x-puzzle-piece', itemData)

        drag = QDrag(self)
        drag.setMimeData(mimeData)
        drag.setHotSpot(QPoint(pixmap.width()/2, pixmap.height()/2))
        drag.setPixmap(pixmap)

        if drag.exec_(Qt.MoveAction) == Qt.MoveAction:
            if self.currentItem() is not None:
                self.takeItem(self.row(item))