PyQt5标签 – 添加不透明效果

在这篇文章中，我们将看到如何为标签添加不透明效果，在默认情况下，标签没有不透明效果，尽管我们可以为标签创建不透明效果。不透明度是衡量对电磁或其他种类的辐射，特别是可见光的不透明性。在辐射传输中，它描述了辐射在介质中的吸收和散射情况，如等离子体、电介质、屏蔽材料、玻璃等。以下是具有不透明效应的标签的表现形式

为了做到这一点，我们必须做到以下几点

1.创建一个标签

2.为标签设置几何图形

3.创建一个QGraphicsOpacityEffect对象

4.在setGraphicsEffect方法的帮助下，将该对象添加到标签中。

语法:

# creating a opacity effect
opacity_effect = QGraphicsOpacityEffect()

# adding opacity effect to the label
label.setGraphicsEffect(opacity_effect)

以下是实施情况

# 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, 600, 400)
  
        # calling method
        self.UiComponents()
  
        # showing all the widgets
        self.show()
  
    # method for widgets
    def UiComponents(self):
  
        # creating label
        label = QLabel("Label", self)
  
        # setting geometry to the label
        label.setGeometry(200, 100, 150, 60)
  
        # setting alignment to the label
        label.setAlignment(Qt.AlignCenter)
  
        # setting font
        label.setFont(QFont('Arial', 15))
  
        # setting style sheet of the label
        label.setStyleSheet("QLabel"
                            "{"
                            "border : 2px solid green;"
                            "background : lightgreen;"
                            "}")
  
        # creating a opacity effect
        self.opacity_effect = QGraphicsOpacityEffect()
  
        # setting opacity level
        self.opacity_effect.setOpacity(0.3)
  
        # adding opacity effect to the label
        label.setGraphicsEffect(self.opacity_effect)
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 :