wxPython – AddRoot() method in wx.TreeCtrl

In this article we are going to learn about AddRoot() method associated with wx.TreeCtrl class of wxPython. AddRoot() is a basic method used in order to add the root node to the tree, returning the new item.

The image and selImage parameters are an index within the normal image list specifying the image to use for unselected and selected items, respectively. If image > -1 and selImage is -1, the same image is used for both selected and unselected items.

Syntax: wx.TreeCtrl.AddRoot(self, text, image=-1, selImage=-1, data=None)

Parameters

Parameter	Input Type	Description
text	string	text on node
image	int	image parameter is an index within the normal image list specifying the image to unselected items, respectively.
selImage	int	selImage parameter is an index within the normal image list specifying the image to selected items, respectively.
data	TreeItemData	data for root item.

Code Example:

import wx

class MainFrame(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, parent = None, title ='TreeCtrl Demo')
        # tree control
        self.tree = wx.TreeCtrl(self, wx.ID_ANY, wx.DefaultPosition, wx.DefaultSize)

        # add a root node to tree
        self.root = self.tree.AddRoot('Root ')

        # expand tree
        self.tree.Expand(self.root)

        # show frame
        self.Show()


if __name__ == '__main__':
    app = wx.App(redirect = False)
    frame = MainFrame()
    app.MainLoop()

Output Window: