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 ())
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Output :