PyQt5基礎學習-QCheckBox()復選框 1.QCheckBox().stateChanged(狀態變化時調用函數) 2.self.checkBox3.setTristate(設置半選中狀態)

復選框的狀態主要有3種， 1.選中，2.未選中，3.半選中，使用QcheckBox().checkState()進行狀態的查看
QCheckBoxDemo.py 

"""
復選框控件(QCheckBox)

3種狀態

未遠中:0

半選中: 1

選中: 2
"""

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import Qt

class QCheckBoxDemo(QWidget):
    def __init__(self):
        super(QCheckBoxDemo, self).__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle("復選框控件演示")

        layout = QHBoxLayout()

        self.checkBox1 = QCheckBox('復選框控件1')
        self.checkBox1.setChecked(True)
        self.checkBox1.stateChanged.connect(lambda: self.checkboxState(self.checkBox1))
        layout.addWidget(self.checkBox1)


        self.checkBox2 = QCheckBox('復選框控件2')
        self.checkBox2.stateChanged.connect(lambda: self.checkboxState(self.checkBox2))
        layout.addWidget(self.checkBox2)


        self.checkBox3 = QCheckBox('半選中')
        self.checkBox3.stateChanged.connect(lambda: self.checkboxState(self.checkBox3))
        #構造半選中狀態
        self.checkBox3.setTristate(True)
        #設置初始化狀態
        self.checkBox3.setCheckState(Qt.PartiallyChecked)
        layout.addWidget(self.checkBox3)

        self.setLayout(layout)


    def checkboxState(self, cb):
        check1Status = self.checkBox1.text() + ", isChecked=" + str(self.checkBox1.isChecked()) + ', checkState=' + \
        str(self.checkBox1.checkState()) + "\n"
        check2Status = self.checkBox2.text() + ", isChecked=" + str(self.checkBox2.isChecked()) + ', checkState=' + \
        str(self.checkBox2.checkState()) + "\n"
        check3Status = self.checkBox3.text() + ", isChecked=" + str(self.checkBox3.isChecked()) + ', checkState=' + \
                       str(self.checkBox3.checkState()) + "\n"
        print(check1Status + check2Status + check3Status)

if __name__ == "__main__":
    app = QApplication(sys.argv)

    main = QCheckBoxDemo()
    main.show()

    sys.exit(app.exec_())