On Sep 21, 12:47 pm, Peter Otten <__pete...@web.de> wrote: > Mike wrote: > > I'm trying to arrange for an Entry widget to check whether its data > > is all digits and whether the number represented is small enough. > > The validate function seem to be called once at startup and not > > afterwards:
> > The print statement run 3 times at startup. > > Editing an Entry does not cause any printing. > > Any ideas? > > Quotinghttp://www.tcl.tk/man/tcl8.5/TkCmd/entry.htm#M12: > > """ > In general, the textVariable and validateCommand can be dangerous to mix. > Any problems have been overcome so that using the validateCommand will not > interfere with the traditional behavior of the entry widget. Using the > textVariable for read-only purposes will never cause problems. The danger > comes when you try set the textVariable to something that the > validateCommand would not accept, which causes validate to become none (the > invalidCommand will not be triggered). The same happens when an error occurs > evaluating the validateCommand. > """ > > You can verify that this is indeed your problem by changing the Levels.vc() > method to always return True for the moment. Returning True does seems to cause vc to be called more often. I'm still not getting the data I want though. The variable always gives me the pre-change string. I gather I need to do something with "%P". google gave me hints that I should use something called "register", but I'm not at all clear on what I should do with them. I don't know how to translate from Tcl to python. -- http://mail.python.org/mailman/listinfo/python-list
