In this article we will see how to make the bar translucent i.e in between opaque and transparent. The progress bar have two components one is the background which is visible when bar is not at 100% other is the bar which tells the progress, when we make bar translucent the background will be visible.
In order to do this we have to change the alpha level i.e transparency level of bar, below is normal progress bar vs translucent progress bar, background color is set to red and bar color is set to green.
In order to change the alpha level we have to change the CSS style sheet, below is the style sheet code for bar.
QProgressBar::chunk
{
background : rgba(0, 255, 0, 100);
}
This sheet is used which 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(80) # setting alignment to center bar.setAlignment(Qt.AlignCenter) # setting background to color # and bar color with alpha factor bar.setStyleSheet("QProgressBar" "{" "background-color : rgba(255, 0, 0, 255);" "border : 1px" "}" "QProgressBar::chunk" "{" "background : rgba(0, 255, 0, 100);" "}" ) App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
