PyQt5 标签 - 访问颜色效果的强度

在本文中，我们将看到如何访问标签颜色效果的强度默认情况下标签没有颜色效果，尽管我们可以为标签创建颜色效果。颜色效果不像背景颜色，它更像是我们在图片上使用的彩色滤镜。强度是颜色效果的强度。

为了做到这一点，我们使用强度方法。

Syntax : color_effect.strength()
Here color_effect is the QGraphicsColorizeEffect object

Argument : It takes no argument

Return : It returns float value

注：强度值范围从 0 到 1.0

下面是实现

# 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__()
  
        # making background color light yellow
        self.setStyleSheet("background : lightyellow;")
  
        # 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))
  
        # creating a color effect
        color_effect = QGraphicsColorizeEffect()
  
        # setting color to color effect
        color_effect.setColor(Qt.darkRed)
  
        # setting strength
        color_effect.setStrength(0.5)
  
        # adding color effect to the label
        label.setGraphicsEffect(color_effect)
  
        # creating result label
        result = QLabel(self)
  
        # setting geometry to the result
        result.setGeometry(200, 200, 300, 30)
  
        # getting the strength
        strength = color_effect.strength()
  
        # setting text to result label
        result.setText("Color : " + str(strength))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：