In this article we will see how we can access the opacity level of the opacity effect of the label, the more the value of opacity the label will be clearly the visible and if opacity value is lesser more transparent it will become. By default opacity level is 0.7 and in order to set the opacity we use setOpacity method.
In order to do this we use opacity method.
Syntax : opacity_effect.opacity(n)
Argument : It takes no argument
Return : It returns float value
Note : Opacity level value ranges from 0 to 1
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) # getting opacity level level = self.opacity_effect.opacity() # setting text to the result label result.setText("Opacity level : " + str(level)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
