import pyqtgraph as pg
from PyQt5.QtWidgets import QApplication, QMainWindow, QShortcut
from PyQt5.QtGui import QKeySequence

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

        # 创建一个 PlotWidget
        self.plot_widget = pg.PlotWidget()
        self.plot_widget.plot([1, 2, 3, 4, 5], [1, 2, 3, 4, 5])

        # 将 PlotWidget 设置为主窗口的中央部件
        self.setCentralWidget(self.plot_widget)

        # 创建 Ctrl + Q 的快捷键
        shortcut = QShortcut(QKeySequence("Ctrl+Q"), self)
        shortcut.activated.connect(self.exitApplication)

    def exitApplication(self):
        # 在按下 Ctrl + Q 时退出应用程序
        QApplication.quit()

def exitApplication():
    # 在按下 Ctrl + Q 时退出应用程序
    QApplication.quit()

if __name__ == '__main__':
    app = QApplication([])

    # 创建主窗口
    pw = QMainWindow()
    # pw = pg.GraphicsView()
    pw.show()
    shortcut = QShortcut(QKeySequence("Ctrl+Q"), pw)
    shortcut.activated.connect(exitApplication)
    # 显示主窗口
    # main_window.show()
    # 启动 PyQtGraph 事件循环
    app.exec()