API object parent-child relationship

parent () Gets the parent object
setParent () to set the parent object

chirldren () Gets the child object (containing multiple)
findChild () to find child objects, if multiple sub-objects that meet the search criteria, the first child to find objects that meet criteria on return, that is, even if multiple child objects that meet, but only to return a child object
findChildren () to find child objects, if multiple sub-objects that meet the search criteria, all child objects in line with the conditions of return, look for the direct and indirect sub-sub-objects objects

 

Examples of Use

# -*- coding: utf-8 -*-
from PyQt5.Qt import *


obj0 = QObject()
obj1 = QObject()
obj2 = QObject()
obj3 = QObject()
obj4 = QObject()
obj5 = QObject()
print("obj0:" , obj0)
print("obj1:" , obj1)
print("obj2:" , obj2)
print("obj3:" , obj3)
print("obj4:" , obj4)
print("obj5:" , obj5)

obj1.setParent(obj0)
obj2.setParent(obj0)
obj3.setParent(obj1)
obj4.setParent(obj2)
obj5.setParent(obj2)

Print (obj4.parent ()) # Returns the parent object obj2 obj4 does not return obj0 
Print (obj0.children ()) # returns the sub-object obj2 and obj1 obj0, do not return to their respective child objects

obj1.setParent(obj2)
Print (obj1.parent ()) # returns the new parent object obj1 obj2, obj0 is not the parent object 
obj1.setParent (obj0) # The parent object obj1 reset to obj0


Print (obj0.findChild (QObject)) # Returns the type of sub-object QObject obj0 returns only one direct child objects found in 
Print (obj0.findChild (QObject, ' . 5 ' )) # Returns QObject type and objectName is obj0 5 the sub-object, the child object may also be an indirect sub-object of obj0 
Print (obj0.findChild (QObject, ' 5 ' , Qt.FindDirectChildrenOnly)) # returns QObject type obj0 objectName is a child and 5, the child object only direct children obj0 of 
Print (obj0.findChildren (QObject)) # return QObject types of sub-objects obj0 returns all direct child objects found in