如何在关闭表单时QtableView单元格失去焦点时保存正在编辑的数据

# 导入必要的模块
from PyQt5.QtWidgets import QApplication, QMainWindow, QTableView, QVBoxLayout, QWidget, QPushButton
from PyQt5.QtCore import Qt, QAbstractTableModel, QModelIndex

class MyTableModel(QAbstractTableModel):
    def __init__(self, data):
        super().__init__()
        self.data = data

    def rowCount(self, parent=QModelIndex()):
        return len(self.data)

    def columnCount(self, parent=QModelIndex()):
        return len(self.data[0])

    def data(self, index, role=Qt.DisplayRole):
        if role == Qt.DisplayRole:
            return self.data[index.row()][index.column()]

    def setData(self, index, value, role=Qt.EditRole):
        if role == Qt.EditRole:
            self.data[index.row()][index.column()] = value
            return True
        return False

    def flags(self, index):
        return Qt.ItemIsEditable | Qt.ItemIsEnabled | Qt.ItemIsSelectable

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        # 创建数据
        self.data = [['A1', 'B1', 'C1'],
                     ['A2', 'B2', 'C2'],
                     ['A3', 'B3', 'C3']]

        # 创建表格视图和模型
        self.table_view = QTableView()
        self.model = MyTableModel(self.data)
        self.table_view.setModel(self.model)

        # 创建保存按钮
        self.save_button = QPushButton('保存')
        self.save_button.clicked.connect(self.saveData)

        # 创建布局并将表格视图和按钮添加到布局中
        layout = QVBoxLayout()
        layout.addWidget(self.table_view)
        layout.addWidget(self.save_button)

        # 创建主窗口部件并设置布局
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)

    def saveData(self):
        # 检查是否有单元格处于编辑状态
        if self.table_view.currentIndex().isValid() and self.table_view.isPersistentEditorOpen():
            # 关闭当前正在编辑的单元格编辑器
            self.table_view.closeEditor(self.table_view.currentIndex(), QAbstractItemView.NoEditTriggers)

        # 保存正在编辑的数据
        self.model.submitAll()

if __name__ == '__main__':
    app = QApplication([])
    window = MyWindow()
    window.show()
    app.exec_()