PyQt5 QScrollBar – 获得倒置的外观属性
在这篇文章中,我们将看到如何获得QScrollBar的倒置外观属性。QScrollBar是一个控件,它使用户能够访问文档中比用来显示它的小部件更大的部分。滑块是条内的可滚动对象。这个属性持有滑块是否倒置显示其数值。如果该属性为false(默认),最小和最大将显示在其滚动条的经典位置。如果该值为真,则最小值和最大值出现在其相反的位置。它可以在setInvertedAppearance方法的帮助下设置。
为了做到这一点,我们将对滚动条对象使用invertedAppearance方法。
语法: roll.invertedAppearance()
参数: 它不需要参数
返回: 它返回bool
下面是实现方法
# 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 inverted appearance
scroll.setInvertedAppearance(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)
# 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()))
# getting inverted appearance property
value = scroll.invertedAppearance()
# setting text to the label
label.setText("Inverted Appearance : " + str(value))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :