propgrid.FileProperty with wildcards

Hello guys, I'm kinda new to Python and got my hands on wxPython. I'm still 
impressed with it and it was a refreshing change after so much Visual C# 
hehe.

While making my litle test app I got stuck in a minor problem that bothers 
me. I created a small propgrid with some object properties. Two of them 
must be FileProperty type, but each of them needs a diferent wildcard. 

So I followed the docs and inherited a class from 
propgrid.PGEditorDialogAdapter with a DoShowDialog method and SetValue() on 
it ( 
https://wxpython.org/Phoenix/docs/html/wx.propgrid.PGEditorDialogAdapter.html#wx.propgrid.PGEditorDialogAdapter.SetValue 
), but the only way I could thing to implement it was to create it from 
another class inherited from propgrid.FileProperty, wich I already had 
because I needed to enable some outsider buttons on value change.

The only method I found to do the work was the GetEditorDialog() method and 
indeed it launched my custom dialog, but when you choose a file and press 
the button, or even canceling it, It hangs out for some time, then crashes 
without exceptions (this program has become irresponsive),

Is there a better way to avoid all of this and get a shortcut ? Lol ! I 
only want to accept .txt in one property and .mp3 on the other. Here's my 
code:

...
        self.txtFile = self.pgrid.Append(CFileProperty("TxtFile   ", 
"txtFile", self.data.txtFile, subpanel=self ))
...

class CFileProperty(propgrid.FileProperty):
    def __init__(self, *args, subpanel=None, **kwargs):
        propgrid.FileProperty.__init__(self, *args, **kwargs)
        
        self.SetDefaultValue(self.GetValue())
        
        #self.EditorDialog = CLyricFileDialog()
        
        #dialogAdapter = CLyricFileDialog(parent=self)
        
        #self.SetEditor(dialogAdapter)
        
        if subpanel:
            self.subpanel = subpanel
    
    def OnSetValue(self, *args, **kwargs):
        #six.print_("Se Edito: %s - %s" % (self.GetLabel(), 
self.GetValue()))
        
        if self.subpanel:
            self.subpanel.OnEnableButtons(self)
        
        return propgrid.FileProperty.OnSetValue(self, *args, **kwargs)
    
    def GetEditorDialog(self, *args, **kwargs):
        return CLyricFileDialog(parent=self)


class CLyricFileDialog(propgrid.PGEditorDialogAdapter):
    def __init__(self, *args, parent=None, **kwargs):
        propgrid.PGEditorDialogAdapter.__init__(self, *args, **kwargs)
        
        self.parent = parent
        
        self.DoShowDialog()
        
    def DoShowDialog(self):
        
        dlg = wx.FileDialog(None, "Open lyric file", "", "", "Lyric Files 
(*.rap)|*.rap|Plain Text (*.txt)|*.txt", wx.FD_OPEN | wx.FD_FILE_MUST_EXIST)
        
        try:
            if dlg.ShowModal() == wx.ID_OK:
                value = dlg.GetFilename()
                self.SetValue(value)
                return True
                
            self.SetValue(value)
            return False
        except :
            print("Exception")
            return False

Im sure the problem is something silly Im missing... but I can't find it.
Sorry about my english! Thank you for your time.

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