Re: [Pythoncard-users] Beginner Help

[Jussi S. <jus...@pp...>]

Jaggo kirjoitti:
> Hello !
>
> I'm trying to implement a GUI to a Python application I'm writing 
> using Python Card.
>
> [If anyone is interested, the application:
> http://www.sourceforge.net/Gutenberg2pod/
> ]
>
> I've ran across a number of issues I failed to answer myself, the 
> biggest of which was:
>
> Regarding the component "list", I failed in attempting to create a 
> button which removed items from a list. I simply couldn't "guess" the 
> function which returned the index of items selected in a list. Had 
> this been Py-win I would have simply ran dir() on it, except that I 
> figure out what exactly was I dir-ing.
>
With a button having a command doItMan, the confusion can be removed 
like this:

def on_doItMan_command(self, event):
        lst = self.components.List1
        # First execution:
        print dir(lst)
        # My-my, what a load of interesting method names!
        # Second execution after finding a couple of
        # promising names:
        print dir(lst.GetSelection)
        print lst.GetSelection.__doc__
        print dir(lst.Delete)
        print lst.Delete.__doc__
        # Sure enough, these are what we need. Let's play a
        # little i.e. click the button without selecting anything
        # in the list:
        x = lst.GetSelection()
        print x, type(x)
        # Aha! The __doc__ is in error: it claims that when
        # no item is selected wx.NOT_FOUND is returned but
        # insted it returns -1. No big deal though!
        # Let's try the operation we are after:
        x = lst.GetSelection()
        if x != -1:
            lst.Delete(x)
        # IT WORKS!!!


HTH,
Jussi
> Thank you for your responce,
> Omer T.
>
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-- 
Jussi Salmela
http://personal.inet.fi/cool/operator/