PyQt5 - QScrollBar
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。它提供了用户在文档中的当前位置和可见文档数量的视觉指示。滚动条通常配备其他控件,可以实现更准确的导航。 Qt 以适合每个平台的方式显示滚动条。
下面是滚动条的样子
例子
我们将创建一个窗口,我们将在其中创建一个 QScrollBar 和 QLabel 小部件,每次滚动条的值发生变化时,它都会显示在标签中
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;")
# 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)
# adding action to the scroll bar
scroll.valueChanged.connect(lambda: do_action())
# creating a action method
def do_action():
# getting current value of scroll bar
value = scroll.value()
# setting text to the label
label.setText("Current Value : " + 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 :