PyQt5--CustomizeSignal

 1 # -*- coding:utf-8 -*-
 2 '''
 3 Created on Sep 14, 2018
 4 
 5 @author: SaShuangYiBing
 6 
 7 Comment: This example is show how to triggered the customize signal.
 8 创建了一个名为closeApp的信号。这个信号会在按下鼠标时触发，它连接着QMainWindow的close()插槽
 9 '''
10 import sys
11 from PyQt5.QtCore import pyqtSignal,QObject
12 from PyQt5.QtWidgets import QApplication,QMainWindow
13 
14 class Communicate(QObject):
15     closeApp = pyqtSignal() # 信号closeApp是Communicate的类属性，它由pyqtSignal()创建。
16 
17 class New_test(QMainWindow):
18     def __init__(self):
19         super().__init__()
20         self.initUI()
21         
22     def initUI(self):
23         self.c = Communicate()
24         self.c.closeApp.connect(self.close) # 自定义closeApp信号连接到QMainWindow的close槽
25         
26         self.setGeometry(300,300,250,150)
27         self.setWindowTitle('Emit Signal')
28         self.show()
29         
30     def mousePressEvent(self,event):
31         self.c.closeApp.emit() # 当在窗体上点击鼠标时会触发closeApp信号，使程序退出
32         
33 if __name__ == '__main__':
34     app = QApplication(sys.argv)
35     ex = New_test()
36     sys.exit(app.exec_())
当程序运行后，在窗口中点击鼠标键时该窗口就会自动退出