PyQt5 - 获取主窗口的不透明度 | windowOpacity() 方法
windowOpacity()方法允许我们查看主窗口的不透明度级别。不透明度是对电磁或其他种类的辐射，尤其是可见光的不可穿透性的量度。在辐射传输中，它描述了辐射在介质中的吸收和散射，例如等离子体、电介质、屏蔽材料、玻璃等。
不透明度级别范围从 0.0 到 1.0，其中 0.0 表示完全透明，1.0 表示完全不透明，默认为 1.0 即完全不透明。
Syntax : self.windowOpacity()
Argument : It takes no argument.
Return : Returns a float value ranging from 0.0 to 1.0
示例 1：
# importing the required libraries
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
class Window(QMainWindow):
def __init__(self):
super().__init__()
# set the title
self.setWindowTitle("Python")
# setting the geometry of window
self.setGeometry(60, 60, 600, 400)
# getting opacity level
level = str(self.windowOpacity())
# creating a label widget
self.label_1 = QLabel(level, self)
# moving position
self.label_1.move(100, 100)
# setting up the border
self.label_1.setStyleSheet("border :3px solid blue;")
# show all the widgets
self.show()
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 ： _method_0.png)
示例 2：
# importing the required libraries
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
class Window(QMainWindow):
def __init__(self):
super().__init__()
# set the title
self.setWindowTitle("Python")
# setting the geometry of window
self.setGeometry(60, 60, 600, 400)
# setting opacity level
self.setWindowOpacity(0.7)
# getting opacity level
level = str(self.windowOpacity())
# creating a label widget
self.label_1 = QLabel(level, self)
# moving position
self.label_1.move(100, 100)
# setting up the border
self.label_1.setStyleSheet("border :3px solid blue;")
# show all the widgets
self.show()
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 ： _method_1.png)