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22checkbox.py
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22checkbox.py
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#! /usr/bin/python
# -*- coding: utf-8 -*-
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QCheckBox
from PyQt5.QtCore import Qt
class Myform(QWidget):
def __init__(self):
super(Myform, self).__init__()
self.initUI()
def initUI(self):
cb = QCheckBox('show title', self)
cb.move(20, 20)
cb.toggle() # 切换默认状态为选中
# 当进行如下设置时,state会有三个值(0,1,2)
# cb.setCheckState(1)
cb.stateChanged.connect(self.changeTitle)
self.setGeometry(300, 300, 300, 200)
self.setWindowTitle('checkbox')
self.show()
# stateChanged信号会传入一个状态参数(默认0和2)
def changeTitle(self, state):
# print state
if state == Qt.Checked:
self.setWindowTitle('checkbox')
else:
self.setWindowTitle('')
if __name__ == '__main__':
app = QApplication(sys.argv)
w = Myform()
sys.exit(app.exec_())