Get selected Item from wxtreeCtrl

Question

How should you get the item selected in wxTreeCtrl? I bind the method to the activated item like this:

 self.tree.Bind (wx.EVT_TREE_ITEM_ACTIVATED, self.OnAdd, id=10)

And in the method OnAdd I try to get the item:

    def OnAdd(self, event):
        item =  event.GetItem()

But it gives error that event has no GetItem() method. Any idea?

UPDATE:

I had assigned a button event to process selected item. So that's why the event had not item attached to it..

Answer 1

You are binding the callback incorrectly. You currently do:

self.Bind (wx.EVT_TREE_ITEM_ACTIVATED, self.OnAdd, id=10)

But the 3rd parameter is the source; id is the 4th parameter. So, change it to this:

self.tree = wx.TreeCtrl(self, size=(200,100)) # Or however you defined it
self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.OnAdd, self.tree, id=10)

This way, the event argument you will get in your OnAdd function will be the tree instance, which will have the GetItem method available.

Full example:

import wx

class TreeExample(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, title='Tree Example', size=(200, 130))
        self.tree = wx.TreeCtrl(self, size=(200, 100))

        root = self.tree.AddRoot('root')
        for item in ['item1', 'item2', 'item3']:
            self.tree.AppendItem(root, item)
        self.Bind(wx.EVT_TREE_ITEM_ACTIVATED, self.OnActivated, self.tree)
        self.tree.Expand(root)

    def OnActivated(self, evt):
        print 'Double clicked on', self.tree.GetItemText(evt.GetItem())

app = wx.PySimpleApp(None)
TreeExample().Show()
app.MainLoop()