In this article we will see how we can set single step property of 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 single step. The smaller of two natural steps that an abstract sliders provides and typically corresponds to the user pressing an arrow key. If the property is modified during an auto repeating key event, behavior is undefined. Default value of single step is 1 for the scroll bar.
In order to do this we will use setSingleStep method with the scroll bar object. Syntax : scroll.setSingleStep(n) Argument : It takes integer as argument Return : It returns None
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 single step
scroll.setSingleStep( 25 )
# 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()))
# 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 :