swh-source/src/kr/co/swh/lecture/python/pyqt5/dial.py

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

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('SWH Academy Window.')
        self.setGeometry(200, 200, 400, 100)

        self.spinBox = QSpinBox(self)
        self.spinBox.move(20, 20)
        self.spinBox.resize(80, 20)
        self.spinBox.valueChanged.connect(self.spinBoxChanged)

        self.statusBar = QStatusBar(self)
        self.setStatusBar(self.statusBar)
        
        self.slider = QSlider(Qt.Horizontal, self)
        self.slider.move(150, 20)
        self.slider.setRange(0, 100)
        self.slider.valueChanged.connect(self.sliderChanged)
        
        self.dial = QDial(self)
        self.dial.move(300, 20)
        self.dial.setRange(0, 100)
        self.dial.resize(50, 50)
        self.dial.valueChanged.connect(self.slider.setValue)

    def spinBoxChanged(self):
        value = self.spinBox.value()
        self.slider.setValue(value)
        self.statusBar.showMessage('%d' % value)
    
    def sliderChanged(self):
        value = self.slider.value()
        self.spinBox.setValue(value)
        self.statusBar.showMessage('%d' % value)
        
if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.show()
    sys.exit(app.exec_())