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PyQt5 QLabel – Accessing blur radius of the blur effect
  • Last Updated : 10 May, 2020

In this article we will see how we can access the blur radius of the label blur effect. The blur radius (required), if set to 0 the shadow will be sharp, the higher the number, the more blurred it will be. By default the blur radius value is 5.0 we can change it any time.

In order to do this we use blurRadius method.

Syntax : blur_effect.blurRadius()
Here blur_effect is the QGraphicsBlurEffect object

Argument : It takes no argument

Return : It returns foat value



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, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
  
        # creating label
        label = QLabel("Label", self)
  
        # setting geometry to the label
        label.setGeometry(200, 100, 150, 60)
  
        # setting alignment to the label
        label.setAlignment(Qt.AlignCenter)
  
        # setting font
        label.setFont(QFont('Arial', 15))
  
        # setting style sheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 2px solid green;"
                            "background : lightgreen;"
                            "}")
  
        # creating a blur effect
        self.blur_effect = QGraphicsBlurEffect()
  
        # setting blur radius
        self.blur_effect.setBlurRadius(15)
  
        # adding blur effect to the label
        label.setGraphicsEffect(self.blur_effect)
  
        # creating a result label
        result = QLabel(self)
  
        # setting geometry to the result
        result.setGeometry(200, 200, 300, 30)
  
        # getting blur radius
        b_radius = self.blur_effect.blurRadius()
  
        # setting text to the result
        result.setText("Blur radius = " + str(b_radius))
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

Output :

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