wxPython - ExpandAll() method in wx.TreeCtrl

Last Updated : 28 Feb, 2023

In this article we are going to learn about ExpandAll() method associated with wx.TreeCtrl class of wxPython. ExpandAll() method is similar to Expand() but the only difference is that this method is used to expand all the items present in the Tree Control. All child nodes along with their parent nodes are visible using this method.

No parameters are required by this method.

Syntax: wx.TreeCtrl.ExpandAll(self)

Parameters:

No parameters are required by this method.

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")

        # expand all nodes of the tree
        self.tree.ExpandAll() 
        
        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()