PyQt5 QScrollBar – 设置 Slider Down 属性
在本文中,我们将看到如何设置 QScrollBar 的滑块向下属性。 QScrollBar 是一个控件,它使用户能够访问大于用于显示它的小部件的文档部分。 Slider 是栏内的可滚动对象。该属性保存滑块是否被按下。该属性由子类设置,以便让抽象滑块知道跟踪是否有任何效果。更改滑块向下属性会发出滑块按下和滑块释放信号。
In order to do this we will use setSliderDown method with the scroll bar object.
Syntax : scroll.setSliderDown(True)
Argument : It takes bool as argument
Return : It returns None
下面是实现
Python3
# 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 slider down
scroll.setSliderDown(True)
# creating a label
label = QLabel("GeesforGeeks", self)
# setting geometry to the label
label.setGeometry(200, 100, 300, 80)
# making label multi line
label.setWordWrap(True)
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :