QCheckBox类

• isChecked()
• setTristate()
• setIcon()
• setText()
• setChecked()

QCheckBox发出的信号如下：

• clicked()
• stateChanged()

实例

1. 创建基于Dialog without Buttons模板的窗口
2. 拖出三个Label部件和三个Check Box部件，如图所示
3. 设定前两个Label部件的text属性为Regular Pizza $10 和Select your extra toppings
4. 设定第三个Label部件的objectName为labelAmount
5. 设定三个Check Box部件的text分别为Extra Cheese $1, Extra Olives $1, and Extra Sausages $2
6. 设定三个Check Box部件的objectName分别为checkBoxCheese, checkBoxOlives, checkBoxSausages
7. 保存为demoCheckBox1.ui文件
8. 使用pyuic5生成demoCheckBox1.py文件
9. 创建callCheckBox1.py文件，调用demoCheckBox1.py文件，代码如下

import sys
from PyQt5.QtWidgets import QDialog
from PyQt5.QtWidgets import QApplication,QWidget,QPushButton
from cookbook_200419.demoCheckBox1 import *

class MyForm(QDialog):
    def __init__(self):
        super().__init__()
        self.ui=Ui_Dialog()
        self.ui.setupUi(self)
        self.ui.checkBoxCheese.stateChanged.connect(self.dispAmount)
        self.ui.checkBoxOlives.stateChanged.connect(self.dispAmount)
        self.ui.checkBoxSausages.stateChanged.connect(self.dispAmount)
        self.show()
    def dispAmount(self):
        amount=10
        if self.ui.checkBoxCheese.isChecked()==True:
            amount=amount+1
        if self.ui.checkBoxOlives.isChecked()==True:
            amount=amount+1
        if self.ui.checkBoxSausages.isChecked()==True:
            amount=amount+2
        self.ui.labelAmount.setText("Total amount for pizza is "+str(amount))

if __name__=="__main__":
    app=QApplication(sys.argv)
    w=MyForm()
    w.show()
    sys.exit(app.exec())