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 ())
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Output :