In this article we will see how to make background of progress bar transparent i.e only the bar of progress bar will be visible and background will be completely transparent. In order to do this we have change the alpha level i.e transparency level to zero which is minimum which makes the background completely invisible. Below is how normal progress bar vs transparent background progress bar looks like
QProgressBar { background-color : rgba(0, 0, 0, 0); border : 1px; }
This style sheet code is used with setStyleSheet method 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 background color to window
self .setStyleSheet("background - color : yellow")
# 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 progress bar
bar = QProgressBar( self )
# setting geometry to progress bar
bar.setGeometry( 200 , 100 , 200 , 30 )
# setting the value
bar.setValue( 30 )
# setting alignment to center
bar.setAlignment(Qt.AlignCenter)
# setting background to invisible
bar.setStyleSheet("QProgressBar"
"{"
"background - color : rgba( 0 , 0 , 0 , 0 );"
"border : 1px "
"}")
App = QApplication(sys.argv)
# create the instance of our Window window = Window()
# start the app sys.exit(App. exec ())
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Output :