qtablewidget鼠标拖拽

您可以通过实现`QTableWidget`的`dragEnterEvent`、`dragMoveEvent`和`dropEvent`事件来实现鼠标拖拽。具体步骤如下：

1. 在`QTableWidget`的构造函数中设置可拖拽属性：

self.setDragEnabled(True)

2. 实现`dragEnterEvent`和`dragMoveEvent`方法，将拖拽的数据类型设置为`QTableWidgetItem`：

def dragEnterEvent(self, event):
    if event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist'):
        event.accept()
    else:
        event.ignore()

def dragMoveEvent(self, event):
    if event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist'):
        event.accept()
    else:
        event.ignore()

3. 实现`dropEvent`方法，获取拖拽的数据并插入到表格中：

def dropEvent(self, event):
    if event.mimeData().hasFormat('application/x-qabstractitemmodeldatalist'):
        data = event.mimeData().data('application/x-qabstractitemmodeldatalist')
        stream = QDataStream(data, QIODevice.ReadOnly)
        row, column, _ = stream.readInt32(), stream.readInt32(), stream.readInt32()
        items = []
        while not stream.atEnd():
            text = stream.readQString()
            item = QTableWidgetItem(text)
            items.append(item)
        for i, item in enumerate(items):
            self.setItem(row + i, column, item)
        event.accept()
    else:
        event.ignore()

这样就可以实现`QTableWidget`的鼠标拖拽功能了。