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DailyNotes/2005/11/14/ClipboardAndCustomDataInWxPython

I've not been able to create a custom wx.DataObject that I can put and get off the wx.Clipboard.

Here's my sample code: 

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# scripts to test out whether I can put a custom data type on the clipboard and read it back in wx.Python

import wx

class MyDataObjectFormat(wx.DataFormat):
    def __init__(self):
        wx.DataFormat.__init__(self,0)
        wx.DataFormat.SetId(self,'MyDOFormat')

class MyDataObject(wx.PyDataObjectSimple):
    """
    taken from http://www.wxpython.org/docs/api/wx.PyDataObjectSimple-class.html
    """
    def __init__(self):
        wx.PyDataObjectSimple.__init__(
            self, wx.CustomDataFormat('MyDOFormat'))
        self.data = ''

    def GetDataSize(self):
        return len(self.data)
    def GetDataHere(self):
        return self.data  # returns a string  
    def SetData(self, data):
        self.data = data
        return True

myobj = MyDataObject()
myobj.SetData(u'hello')
print myobj.GetDataHere()

# put it on the clipboard and try to read it back

cb = wx.TheClipboard
if cb.Open():
    cb.SetData(myobj)
    cb.Close()

# now try to open and retrieve the clipboard object

if cb.Open():
    myobj2 = MyDataObject()
    if cb.IsSupported(MyDataObjectFormat()):
        print 'clipboard does support MyDataObject Format'
        if cb.GetData(myobj2):
            print 'reading from clipboard: ', myobj2.GetDataHere()
        else:
            print 'read from clipboard failed'
    cb.Close()

The output from the program is on my machine (wxPython 2.6.1.0 on WinXP): 

>>> hello
clipboard does support MyDataObject Format
read from clipboard failed

I'm puzzled by what else I need to do to enable the clipboard to interact properly with MyDataObject.