PyQt5 QSpinBox – 检查它是否是给定子的祖先
在这篇文章中,我们将看到如何检查旋转盒是否是给定子的祖先。如果旋转框是给定的子代的父代(或祖代,以此类推),并且旋转框和子代都在同一个窗口中,那么它就是祖代,否则它就不是。
为了做到这一点,我们使用旋转盒对象的 isAncestorOf 方法。
语法: spin_box.isAncestorOf(child)
参数: 它接受QWidget对象的参数。
返回: 它返回bool
下面是实现方法
# 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 spin box
self.spin = QSpinBox(self)
# setting geometry to spin box
self.spin.setGeometry(100, 100, 250, 40)
# setting range to the spin box
self.spin.setRange(1, 999999)
# setting prefix to spin
self.spin.setPrefix("PREFIX ")
# setting suffix to spin
self.spin.setSuffix(" SUFFIX")
# getting child of spin box
child = self.spin.children()[0]
# creating a label
label = QLabel(self)
# making the label multi line
label.setWordWrap(True)
# setting geometry to the label
label.setGeometry(100, 200, 200, 60)
# checking if spin box is ancestor
check = self.spin.isAncestorOf(child)
# setting text to the label
label.setText("Ancestor ? : " + 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: