PyQt5 QLabel 根据用户指令禁用颜色效果
在这篇文章中,我们将看到如何根据用户的指令禁用标签的颜色效果,这样当用户选中单选按钮时,颜色效果就会消失,当用户取消单选按钮时,颜色效果又会出现。
为了做到这一点,我们必须做以下工作:
1.创建一个标签
2.创建一个颜色效果对象,并将其设置到标签上
3.创建一个单选按钮
4.给单选按钮添加动作
5.在动作中检查单选按钮是否被选中,如果被选中则使颜色效果失效
6.否则,使颜色效果生效
为了使颜色效果禁用和启用,我们使用setEnable方法。
语法: color_effect.setEnabled(False)
参数: 它以bool为参数
返回: 它返回无。
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__()
# 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
self.color_effect = QGraphicsColorizeEffect()
# setting color to color effect
self.color_effect.setColor(Qt.darkBlue)
# adding color effect to the label
label.setGraphicsEffect(self.color_effect)
# creating a radio button
self.button = QRadioButton("Disable color filter", self)
# setting geometry
self.button.setGeometry(200, 200, 300, 30)
# adding action to the button
self.button.clicked.connect(self.do_something)
# action called by the radio button
def do_something(self):
# radio is checked ?
if self.button.isChecked() == True:
# making color effect disable
self.color_effect.setEnabled(False)
else:
# making color effect enable
self.color_effect.setEnabled(True)
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app
sys.exit(App.exec())