PyQt5 – Checking if the opacity effect is disabled or not

In this article we will see how we can check if the opacity effect of the label is disabled or not, by default there is no opacity effect to the label although we can add opacity effect any time. In order to make opacity effect enable or disable we use setEnable method.

In order to check the opacity effect is disable and enable we use isEnable method.

Syntax : opacity_effect.isEnabled()

Argument : It takes no argument

Return : It returns bool

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 opacity effect
        self.opacity_effect = QGraphicsOpacityEffect()

        # setting opacity level
        self.opacity_effect.setOpacity(0.3)

        # adding opacity effect to the label
        label.setGraphicsEffect(self.opacity_effect)

        # result label
        result = QLabel(self)

        # setting geometry of the result label
        result.setGeometry(200, 200, 300, 30)

        # checking opacity is enabled or not
        check = self.opacity_effect.isEnabled()

        # setting text to the result label
        result.setText("Enabled ? : " + str(check))



# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :