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Groups > comp.lang.python > #48103

Re: Future standard GUI library

From "Frank Millman" <frank@chagford.com>
Subject Re: Future standard GUI library
Date 2013-06-14 11:36 +0200
References <mailman.1803.1368885785.3114.python-list@python.org><20130522154233.fe5263cb231c375fc60c7c9b@gmx.net><mailman.1967.1369232658.3114.python-list@python.org><20130523174145.22a6c46f586b0a1f656d2412@gmx.net><mailman.2020.1369324735.3114.python-list@python.org><20130526194310.9cdb1be80b42c7fdf0ba502f@gmx.net><mailman.2193.1369597318.3114.python-list@python.org><20130527172250.a8b0ce44f29398d63a4ec650@gmx.net><mailman.2258.1369674988.3114.python-list@python.org><20130530184045.6d15530be70e18d96e5654ad@gmx.net><mailman.2430.1369932803.3114.python-list@python.org><20130601201817.55d3361dda93dac387a9eab6@gmx.net><mailman.2529.1370119566.3114.python-list@python.org><20130612222819.2a044e86ab4b6defe1939a04@gmx.net><kpc3jv$438$1@ger.gmane.org><CAPTjJmo+fWsCD3Lb6s+zmWspKzzk_JB=pbcvfLBZjGCFxvM9HA@mail.gmail.com><kpea9o$u0m$1@ger.gmane.org> <CAPTjJmq_m4y0UXXt3JqYThJj9CKbsvp+Z2PGF5v_31xLrgfr4Q@mail.gmail.com>
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"Chris Angelico" <rosuav@gmail.com> wrote in message 
news:CAPTjJmq_m4y0UXXt3JqYThJj9CKbsvp+Z2PGF5v_31xLrgfr4Q@mail.gmail.com...
> On Fri, Jun 14, 2013 at 3:39 PM, Frank Millman <frank@chagford.com> wrote:
>>
>> In my case, it is either-or. I do not just do field-by-field validation, 
>> I
>> do field-by-field submission. The server builds up a record of the data
>> entered while it is being entered. When the user selects 'Save', it does 
>> not
>> resend the entire form, it simply sends a message to the server telling 
>> it
>> to process the data it has already stored.
>
> Ah, I see what you mean. What I was actually saying was that it's
> mandatory to check on the server, at time of form submission, and
> optional to pre-check (either on the client itself, for simple
> syntactic issues, or via AJAX or equivalent) for faster response.
>
> As a general rule, I would be inclined to go with a more classic
> approach for reasons of atomicity. What happens if the user never gets
> around to selecting Save? Does the server have a whole pile of data
> that it can't do anything with? Do you garbage-collect that
> eventually? The classic model allows you to hold off inserting
> anything into the database until it's fully confirmed, and then do the
> whole job in a single transaction.
>

The data is just stored in memory in a 'Session' object. I have a 
'keep-alive' feature that checks if the client is alive, and removes the 
session with all its data if it detects that the client has gone away. 
Timeout is configurable, but I have it set to 30 seconds at the moment.

The session is removed immediately if the user logs off. He is warned if 
there is unsaved data.

Frank

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Thread

Future standard GUI library Beinan Li <li.beinan@gmail.com> - 2013-05-18 10:03 -0400
  Re: Future standard GUI library Kevin Walzer <kw@codebykevin.com> - 2013-05-18 11:32 -0400
  Re: Future standard GUI library Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-05-18 21:25 +0000
  Re: Future standard GUI library llanitedave <llanitedave@veawb.coop> - 2013-05-18 20:01 -0700
    Re: Future standard GUI library Kevin Walzer <kw@codebykevin.com> - 2013-05-19 08:57 -0400
  Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-22 15:42 +0200
    Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-23 00:24 +1000
      Re: Future standard GUI library llanitedave <llanitedave@veawb.coop> - 2013-05-22 19:31 -0700
        Re: Future standard GUI library Fábio Santos <fabiosantosart@gmail.com> - 2013-05-23 07:43 +0100
        Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-23 16:48 +1000
        RE: Future standard GUI library Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-23 09:58 +0300
        Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-23 17:03 +1000
        RE: Future standard GUI library Fábio Santos <fabiosantosart@gmail.com> - 2013-05-23 08:08 +0100
      Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-23 17:41 +0200
        Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-24 01:51 +1000
          Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-26 19:43 +0200
            Re: Future standard GUI library Roy Smith <roy@panix.com> - 2013-05-26 14:16 -0400
              Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-27 17:31 +0200
                Re: Future standard GUI library Michael Torrie <torriem@gmail.com> - 2013-05-27 11:13 -0600
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-28 08:21 +1000
                Re: Future standard GUI library Roy Smith <roy@panix.com> - 2013-05-27 19:10 -0400
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-28 17:11 +1000
                Re: Future standard GUI library 88888 Dihedral <dihedral88888@gmail.com> - 2013-05-28 02:40 -0700
                Re: Future standard GUI library Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-28 01:01 +0000
            RE: Future standard GUI library Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-26 21:32 +0300
              Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-28 19:26 +0200
                Re: Future standard GUI library Michael Torrie <torriem@gmail.com> - 2013-05-28 12:16 -0600
                RE: Future standard GUI library Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-29 00:17 +0300
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-29 17:20 +1000
            Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-27 04:56 +1000
            Re: Future standard GUI library Michael Torrie <torriem@gmail.com> - 2013-05-26 13:41 -0600
              Re: Future standard GUI library Roy Smith <roy@panix.com> - 2013-05-26 15:45 -0400
                Re: Future standard GUI library Michael Torrie <torriem@gmail.com> - 2013-05-26 15:13 -0600
                Re: Future standard GUI library Grant Edwards <invalid@invalid.invalid> - 2013-05-28 15:40 +0000
              Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-27 17:22 +0200
                Re: Future standard GUI library Michael Torrie <torriem@gmail.com> - 2013-05-27 11:16 -0600
                Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-30 18:40 +0200
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-31 02:53 +1000
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-06-02 06:46 +1000
                Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-06-12 22:28 +0200
                Re: Future standard GUI library "Frank Millman" <frank@chagford.com> - 2013-06-13 11:32 +0200
                Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-06-14 17:18 +0200
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-06-15 03:00 +1000
                Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-06-15 14:25 +0200
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-06-15 23:26 +1000
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-06-14 00:04 +1000
                Re: Future standard GUI library "Frank Millman" <frank@chagford.com> - 2013-06-14 07:39 +0200
                Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-06-14 19:10 +1000
                Re: Future standard GUI library "Frank Millman" <frank@chagford.com> - 2013-06-14 11:36 +0200
                Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-06-01 20:18 +0200
                Re: Future standard GUI library Terry Jan Reedy <tjreedy@udel.edu> - 2013-06-01 17:52 -0400
            Re: Future standard GUI library Ian Foote <ian@feete.org> - 2013-05-26 22:02 +0100
            Re: Future standard GUI library Chris Angelico <rosuav@gmail.com> - 2013-05-27 08:09 +1000
        Re: Future standard GUI library Grant Edwards <invalid@invalid.invalid> - 2013-05-23 20:37 +0000
          Re: Future standard GUI library Wolfgang Keller <feliphil@gmx.net> - 2013-05-28 19:28 +0200
            Re: Future standard GUI library Grant Edwards <invalid@invalid.invalid> - 2013-05-28 18:25 +0000
              Re: Future standard GUI library 88888 Dihedral <dihedral88888@gmail.com> - 2013-05-28 16:19 -0700

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