On Fri, Aug 8, 2014 at 6:57 PM, Paul Rudin <paul.nos...@rudin.co.uk> wrote: > Chris Angelico <ros...@gmail.com> writes: > >> On Fri, Aug 8, 2014 at 3:57 PM, Jaydeep Patil <patil.jay2...@gmail.com> >> wrote: >>> I mean to say, One GUI should be always on top from start to end of code >>> running. >>> So that user cant do any other operation. >>> I am using wxpython >> >> Ah, that would be called "System Modal", and should be reserved for >> absolutely critical system-wide alerts. It's also a feature that's >> simply not available to most user-space programs, and not available in >> most GUI toolkits. >> >> Short answer: Don't. > > There are commercial software packages that do this sort of > thing. Examsoft is one - the idea being that people can take exams > without access to other software at the same time (so that, for example, > they could look at previously prepared notes).
Yeah; like I said, "Don't" is the short answer. There will be exceptions, some extremely rare situations when system modality is correct; but fundamentally, it's impossible to use GUI software to control what a person does with a computer (for instance, on all my Linux systems, I can hit Ctrl-Alt-F1 to switch away from the GUI altogether). So I'm dubious about its value for anything that isn't an absolutely critical alert. With the OS/2 Presentation Manager, I had SystemModal available as a window flag, and I used it for two purposes: an out-of-memory alert (or similarly critical resource shortage), and a pseudo-login screen (it just asked for a name, no password or anything, and it didn't change what you had access to - it was for the purposes of logging and messaging identification, nothing more); and the latter didn't really need to be system modal, it was just for convenience. If there's no way to make a wxpython window system modal, I would say it's no great loss. The chances of the feature being misused are extremely high; the cases where it's actually needed are extremely rare. Hence my short answer of "Don't"; honestly, there are more times when you need to optimize Python code for performance than there are times to create system modal windows. ChrisA -- https://mail.python.org/mailman/listinfo/python-list