PyQt5标签 – 访问不透明度效果的不透明度级别
在这篇文章中,我们将看到如何访问标签的不透明度效果的不透明度级别,不透明度的值越大,标签就越明显可见,如果不透明度的值越小,它就越透明。默认的不透明度级别是0.7,为了设置不透明度,我们使用setOpacity方法。
为了做到这一点,我们使用不透明度方法。
语法: opacity_effect.opacity(n)
参数: 它不需要参数
返回: 它返回浮动值
注意: 不透明度水平值的范围是0到1。
以下是实现方法
# 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, 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)
# result label
result = QLabel(self)
# setting geometry of the result label
result.setGeometry(200, 200, 300, 30)
# getting opacity level
level = self.opacity_effect.opacity()
# setting text to the result label
result.setText("Opacity level : " + str(level))
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())
输出 :