[Tutor] More Tkinter Help Please [Dialog windows]

[alan.gauld@bt.com]

> The Dialog box is now popping up like it should. The only 
> problem comes when I click on OK in the dialog box. 
> Instead of saving the text in t1 to the file it gives 
> ...
> AttributeError: Saving instance has no attribute 't1'
> 
> 
> I would of thought that t1 is still defined from PyShell when 
> called in the class Saving since it is being called in PyShell

Nope, the new instance has no knoiwledge of whats in Pyshell 
- that's object encapsulation at work.

You will have to pass either a reference to PyShell to Saving
(Which you do already via the f constructor parameter) and 
then access t1 via that refe5rence or pass the t1 string 
directly to Saving.

However as I said in my message yesterday the conventional way 
to do this is for SAving to pass back the filename/path to 
PyShell and let it save the data - PyShell owns the t1 text 
so it should be responsible for saving it. The dialog's 
responsibility is limited to getting the right file location 
from the user - thats why its called a "dialog"!

Alan G.