In this article, we are going to learn about ExpandAllChildren() method associated with wx.TreeCtrl class of wxPython. ExpandAllChildren() method is used in order to expand all the nodes that comes under a particular item that is passed as a parameter in the method. Basically, this method expands the given item and all its children recursively.
This function takes the tree node item as a parameter to whom we want to expand recursively.
Syntax: wx.TreeCtrl.ExpandAllChildren(self,i tem)
Parameters:
Parameter | Type | Description |
item | wx.TreeItemId | Item that we want to associate editlabel with. |
Code Example:
Python
import wx class MyTree(wx.TreeCtrl): def __init__( self , parent, id , pos, size, style): wx.TreeCtrl.__init__( self , parent, id , pos, size, style) class TreePanel(wx.Panel): def __init__( self , parent): wx.Panel.__init__( self , parent) # create tree control in window self .tree = MyTree( self , wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize, wx.TR_HAS_BUTTONS) # CREATE TREE ROOT self .root = self .tree.AddRoot( 'root' ) self .tree.SetPyData( self .root, ( 'key' , 'value' )) # add item to root item = self .tree.AppendItem( self .root, "Item" ) item2 = self .tree.AppendItem( self .root, "Item" ) item3 = self .tree.AppendItem(item, "SubItem" ) item4 = self .tree.AppendItem(item, "SubItem" ) item5 = self .tree.AppendItem(item2, "SubItem" ) item6 = self .tree.AppendItem(item, "SubItem" ) # expand root node self .tree.Expand( self .root) # expand all nodes of the tree self .tree.ExpandAllChildren(item) sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add( self .tree, 0 , wx.EXPAND) self .SetSizer(sizer) class MainFrame(wx.Frame): def __init__( self ): wx.Frame.__init__( self , parent = None , title = 'TreeCtrl Demo' ) panel = TreePanel( self ) self .Show() if __name__ = = '__main__' : app = wx.App(redirect = False ) frame = MainFrame() app.MainLoop() |
Output:
Attention geek! Strengthen your foundations with the Python Programming Foundation Course and learn the basics.
To begin with, your interview preparations Enhance your Data Structures concepts with the Python DS Course.