PyQt5--CustomizeSignal

# -*- coding:utf-8 -*-
'''
Created on Sep 14, 2018

@author: SaShuangYiBing

Comment: This example is show how to triggered the customize signal.
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
'''
import sys
from PyQt5.QtCore import pyqtSignal,QObject
from PyQt5.QtWidgets import QApplication,QMainWindow

class Communicate(QObject):
    closeApp = pyqtSignal() # 信号closeApp是Communicate的类属性，它由pyqtSignal()创建。

class New_test(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()
        
    def initUI(self):
        self.c = Communicate()
        self.c.closeApp.connect(self.close) # 自定义closeApp信号连接到QMainWindow的close槽
        
        self.setGeometry(300,300,250,150)
        self.setWindowTitle('Emit Signal')
        self.show()
        
    def mousePressEvent(self,event):
        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
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = New_test()
    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