PyQt5 QScrollBar – 获取窗口不透明度属性
在这篇文章中,我们将看到如何获得QScrollBar的窗口不透明度属性。QScrollBar是一个控件,它使用户能够访问文档中的部分内容,这些内容比用来显示它的小部件要大。Slider是条内的可滚动对象。这个属性持有窗口的不透明度水平。不透明度的有效范围是1.0(完全不透明)到0.0(完全透明)。它可以在setWindowOpacity方法的帮助下设置。
为了做到这一点,我们将使用滚动条对象的windowOpacity方法。
语法: roll.windowOpacity()
参数: 它不需要参数
返回: 它返回浮动值
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 window opacity property
scroll.setWindowOpacity(1.0)
# 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 window opacity property
value = scroll.windowOpacity()
# setting text to the label
label.setText("Window Opacity Property : " + 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 :