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PQt5 – Transparent Background Progress Bar

  • Last Updated : 22 Apr, 2020

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

To change the alpha level we have to change the CSS style sheet of Progress Bar, below is the style sheet.

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):
        # 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
        # showing all the widgets
    # 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
        # setting alignment to center
        # setting background to invisible
                          "background-color : rgba(0, 0, 0, 0);"
                          "border : 1px"
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output :

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