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 ())
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Output :