如何在不冻结界面的情况下，在QTextEdit中进行计算时实时更新文本？

from PyQt5.QtCore import QThread, pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QTextEdit, QPushButton

class CalculationThread(QThread):
    resultUpdated = pyqtSignal(str)
    
    def run(self):
        # 执行计算任务
        result = self.calculate()
        # 发送计算结果信号
        self.resultUpdated.emit(result)
    
    def calculate(self):
        # 实时计算逻辑
        result = ""
        # ...
        return result

class MainWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        
        self.textEdit = QTextEdit(self)
        self.textEdit.setReadOnly(True)
        self.textEdit.setGeometry(10, 10, 280, 180)
        
        self.button = QPushButton("开始计算", self)
        self.button.setGeometry(10, 200, 280, 30)
        self.button.clicked.connect(self.startCalculation)
        
    def startCalculation(self):
        self.button.setEnabled(False)
        
        # 创建并启动计算线程
        calculationThread = CalculationThread()
        calculationThread.resultUpdated.connect(self.updateResult)
        calculationThread.finished.connect(self.calculationFinished)
        calculationThread.start()
    
    def updateResult(self, result):
        # 更新计算结果到QTextEdit控件
        self.textEdit.setPlainText(result)
    
    def calculationFinished(self):
        self.button.setEnabled(True)

if __name__ == "__main__":
    app = QApplication([])
    mainWindow = MainWindow()
    mainWindow.show()
    app.exec_()