PyQt5 – 复选框的 isLeftToRight() 方法

当我们默认创建一个复选框时，指示器位于左侧，我们称之为从左到右的方向，尽管我们可以使用setLayoutDirection方法更改其方向。 isLeftToRight方法用于检查布局方向是否为从左到右，默认布局方向返回 True。它与isRightToLeft方法相反。

Syntax : checkbox.isLeftToRight()

Argument : It takes no argument.

Return : It returns bool, True if layout direction is left to right else False.

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__()
  
        # 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 the check-box
        checkbox = QCheckBox('Geek ?', self)
  
        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 30)
  
        # checking direction
        check = checkbox.isLeftToRight()
  
        # printing the check
        print("Before changing direction  : " + str(check))
  
        # changing position of indicator
        checkbox.setLayoutDirection(Qt.RightToLeft)
  
        # checking direction
        check = checkbox.isLeftToRight()
  
        # printing the check
        print("After changing direction  : " + str(check))
  
  
# create pyqt5 app
App = QApplication(sys.argv)
  
# create the instance of our Window
window = Window()
  
# start the app
sys.exit(App.exec())

输出 ：

Before changing direction  : True
After changing direction  : False