In this article we will see how we can get the window opacity property of the QScrollBar. QScrollBar is a control that enables the user to access parts of a document that is larger than the widget used to display it. Slider is the scroll-able object inside the bar. This property holds the level of opacity for the window. The valid range of opacity is from 1.0 (completely opaque) to 0.0 (completely transparent). It can be set with the help of setWindowOpacity method.
In order to do this we will use windowOpacity method with the scroll bar object.
Syntax : scroll.windowOpacity()
Argument : It takes no argument
Return : It returns float 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 , 500 , 400 )
# calling method
self .UiComponents()
# showing all the widgets
self .show()
# method for components
def UiComponents( self ):
scroll = QScrollBar( self )
# setting geometry of the scroll bar
scroll.setGeometry( 100 , 50 , 30 , 200 )
# making its background color to green
scroll.setStyleSheet("background : lightgrey;")
# setting window opacity property
scroll.setWindowOpacity( 1.0 )
# creating a label
label = QLabel("GeeksforGeeks", self )
# setting geometry to the label
label.setGeometry( 200 , 100 , 300 , 80 )
# making label multi line
label.setWordWrap( True )
# getting value changed signal
scroll.valueChanged.connect( lambda : do_action())
# method called when signal is emitted
def do_action():
# setting text to the label
label.setText("Current Value : " + str (scroll.value()))
# getting window opacity property
value = scroll.windowOpacity()
# setting text to the label
label.setText("Window Opacity Property : " + str (value))
# 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 :