PyQt5（13）多种按钮控件QAbstractButton的子类

'''

单选按钮控件（QRadioButton）

'''

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

class QRadioButtonDemo(QWidget):
    def __init__(self):
        super(QRadioButtonDemo,self).__init__()
        self.initUI()
    def initUI(self):
        self.setWindowTitle('QRadioButton')
        layout = QHBoxLayout()
        self.button1 = QRadioButton('单选按钮1')
        self.button1.setChecked(True)

        self.button1.toggled.connect(self.buttonState)
        layout.addWidget(self.button1)

        self.button2 = QRadioButton('单选按钮2')
        self.button2.toggled.connect(self.buttonState)
        layout.addWidget(self.button2)
        self.setLayout(layout)


    def buttonState(self):
        radioButton = self.sender()

        if radioButton.isChecked() == True:
            print('<' + radioButton.text() + '> 被选中')
        else:

'''

复选框控件（QCheckBox）

3种状态

未选中：0

半选中：1

选中：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('复选框控件演示')

        layout = QHBoxLayout()

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

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

        self.checkBox3 = QCheckBox('半选中')
        self.checkBox3.stateChanged.connect(lambda:self.checkboxState(self.checkBox3))
        self.checkBox3.setTristate(True)
        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_())

 

            print('<' + radioButton.text() + '> 被取消选中状态')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = QRadioButtonDemo()
    main.show()
    sys.exit(app.exec_())

 

'''

按钮控件（QPushButton）

QAbstractButton的子类：

QPushButton
AToolButton
QRadioButton单选按钮
QCheckBox多选按钮，复选框


'''


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

class QPushButtonDemo(QDialog) :
    def __init__(self):
        super(QPushButtonDemo,self).__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('QPushButton Demo')

        layout = QVBoxLayout()

        self.button1 = QPushButton('第1个按钮')
        self.button1.setText('First Button1')
        self.button1.setCheckable(True)
        self.button1.toggle()       #设置开关
        self.button1.clicked.connect(self.buttonState)
        self.button1.clicked.connect(lambda :self.whichButton(self.button1))

        layout.addWidget(self.button1)

        # 在文本前面显示图像

        self.button2 = QPushButton('图像按钮')
        self.button2.setIcon(QIcon(QPixmap('./images/python.png')))
        self.button2.clicked.connect(lambda:self.whichButton(self.button2))
        layout.addWidget(self.button2)

        self.button3 = QPushButton('不可用的按钮')
        self.button3.setEnabled(False)
        layout.addWidget(self.button3)

        self.button4 = QPushButton('&MyButton')
        self.button4.setDefault(True)
        self.button4.clicked.connect(lambda:self.whichButton(self.button4))
        layout.addWidget(self.button4)

        self.setLayout(layout)
        self.resize(400,300)

    def buttonState(self):
        if self.button1.isChecked():
            print('按钮1已经被选中')
        else:
            print('按钮1未被选中')

    def whichButton(self,btn):
        print('被单击的按钮是<' + btn.text() + '>')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = QPushButtonDemo()
    main.show()
    sys.exit(app.exec_())