[Tkinter-discuss] Kind of the old intercept the Entry() tab key question

[Bob Greschke]

I know this must have been handled before (but I can find no evidence of it), but what I want to do is have an entry field for filespecs (path+filename) that is on the same 'form' with other entry fields and I want the user to be able to use the Tab key to get to the field (so takefocus needs to be 1).

When the field has the focus if what is in the field (i.e. the StringVar) does not match any filename (or path) when the Tab key is pressed I just want the program to beep and the cursor to stay in the field.

If what is in there can be completed to match a filename (or path) then the contents gets completed when the Tab is pressed and the cursor stays in the field.

If what is in the field already matches a filename (or path) then the Tab key press goes on to the next field as it usually would for other Entry fields.

Is this possible?  At this point I'm still not having much luck just getting the cursor to stay put after a Tab press, and using return "break" in the <Tab> handler doesn't seem to be doing anything (I've only ever gotten the "break" thing to work once a long time ago, but then didn't use it, and I can't remember how I got it to work).

Thanks!

Bob