PyQt5 QDial – Setting Slider’s Value

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In this article we will see how we can set slider’s value of the QDial. User can change the value with the help of mouse although we can change it programmatically as well. The slider forces the value to be within the legal range i.e value should be greater than or equal to the minimum value and it should be less than or equal to the maximum limit. Changing the value also changes the slider position.

In order to do this we use setValue method with the QDial object

Syntax : dial.setValue(n)

Argument : It takes integer as argument

Return : It returns None

Below is the implementation

# importing libraries 
from PyQt5.QtWidgets import * 
from PyQt5 import QtCore, QtGui 
from PyQt5.QtGui import * 
from PyQt5.QtCore import * 
import sys 
  
  
class Window(QMainWindow): 
  
    def __init__(self): 
        super().__init__() 
  
        # setting title 
        self.setWindowTitle("Python ") 
  
        # setting geometry 
        self.setGeometry(100, 100, 500, 400) 
  
        # calling method 
        self.UiComponents() 
  
        # showing all the widgets 
        self.show() 
  
    # method for components 
    def UiComponents(self): 
  
        # creating QDial object 
        dial = QDial(self) 
  
        # setting geometry to the dial 
        dial.setGeometry(100, 100, 100, 100) 
  
        # making notch visible 
        dial.setNotchesVisible(True) 
  
        # value 
        value = 50
  
        # setting value to the dial slider 
        dial.setValue(value) 
  
  
  
  
# create pyqt5 app 
App = QApplication(sys.argv) 
  
# create the instance of our Window 
window = Window() 
  
# start the app 
sys.exit(App.exec()) 