PyQT5 （八十六）PyQt5信号和槽 --Override(覆盖)槽函数

PyQt5信号和槽 --Override(覆盖)槽函数

import sys
from functools import partial

from PyQt5.QtCore import QObject, pyqtSignal, Qt
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QHBoxLayout, QPushButton, QMessageBox, QApplication, QVBoxLayout, QWidget, 
    QLabel, QMainWindow

'''
PyQt5信号和槽 --Override(覆盖)槽函数
'''


class OverrideSlotDemo(QWidget):

    def __init__(self):
        super().__init__()
        self.setWindowTitle("PyQt5信号和槽 -Override(覆盖)槽函数")

        button1 = QPushButton("Esc 关闭窗口覆盖keyPressEvent槽（）")
        button2 = QPushButton("按下Alt更改标题")
        layout = QHBoxLayout()
        layout.addWidget(button1)
        layout.addWidget(button2)
        self.setLayout(layout)

    def keyPressEvent(self, e):
        if e.key() == Qt.Key_Escape:
            self.close()
        if e.key() == Qt.Key_Alt:
            self.setWindowTitle("按下了ALT键")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = OverrideSlotDemo()
    win.setGeometry(400,200,500,200)
    win.show()
    sys.exit(app.exec_())