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Re: Design pattern: refresh-based or event-based?

From Paul Rubin <no.email@nospam.invalid>
Newsgroups comp.arch.embedded
Subject Re: Design pattern: refresh-based or event-based?
Date 2015-07-22 10:55 -0700
Organization A noiseless patient Spider
Message-ID <87wpxst6u0.fsf@jester.gateway.sonic.net> (permalink)
References <moku8e$6sf$1@dont-email.me> <d16su5FufvjU1@mid.dfncis.de> <mon7vk$8at$1@dont-email.me> <moongf.10c.1@stefan.msgid.phost.de>

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Stefan Reuther <stefan.news@arcor.de> writes:
> Long story short: I would not optimize for minimum redraw, but for
> simplicity. Probably not redraw the whole wallpaper each time, but
> every gauge.

I would go for simplicity too, which means let the GUI toolkit or window
system deal with the redrawing.  I think the question is not about
redrawing per se though, but about how to update the individual GUI
widgets.  And having written a bunch of such things, I've generally
found it simplest to just update them asynchronously when external
events are observed, rather than trying to synchronize all the updates.
That's how gauges and indicators work in the analog world too.  It's
usually been straightforward to code this way with the toolkits I've
used, though that's not a huge number.

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Thread

Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-21 10:02 +0200
  Re: Design pattern: refresh-based or event-based? upsidedown@downunder.com - 2015-07-21 11:37 +0300
    Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-21 11:00 +0200
      Re: Design pattern: refresh-based or event-based? Dimiter_Popoff <dp@tgi-sci.com> - 2015-07-22 01:34 +0300
        Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 06:57 +0200
          Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-21 23:02 -0700
            Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 09:17 +0200
              Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-22 00:23 -0700
        Re: Design pattern: refresh-based or event-based? upsidedown@downunder.com - 2015-07-22 10:02 +0300
          Re: Design pattern: refresh-based or event-based? Dimiter_Popoff <dp@tgi-sci.com> - 2015-07-22 19:48 +0300
            Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-23 09:04 +0200
              Re: Design pattern: refresh-based or event-based? Dimiter_Popoff <dp@tgi-sci.com> - 2015-07-23 10:29 +0300
                Re: Design pattern: refresh-based or event-based? raimond.dragomir@gmail.com - 2015-07-31 02:34 -0700
  Re: Design pattern: refresh-based or event-based? Don Y <this@is.not.me.com> - 2015-07-21 03:16 -0700
  Re: Design pattern: refresh-based or event-based? Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2015-07-21 14:40 +0200
    Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 07:01 +0200
      Re: Design pattern: refresh-based or event-based? Stefan Reuther <stefan.news@arcor.de> - 2015-07-22 18:30 +0200
        Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-22 10:55 -0700
  Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-21 08:26 -0700
    Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 07:04 +0200
      Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-21 23:13 -0700
        Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 09:24 +0200
          Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-22 08:26 -0700
            Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-23 09:00 +0200
  Re: Design pattern: refresh-based or event-based? hamilton <hamilton@nothere.com> - 2015-07-21 14:07 -0600
    Re: Design pattern: refresh-based or event-based? Don Y <this@is.not.me.com> - 2015-07-21 13:12 -0700
  Re: Design pattern: refresh-based or event-based? Andrew Smallshaw <andrews@sdf.lonestar.org> - 2015-07-22 00:19 +0000
    Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-21 18:09 -0700
      Re: Design pattern: refresh-based or event-based? Andrew Smallshaw <andrews@sdf.lonestar.org> - 2015-07-22 21:18 +0000
        Re: Design pattern: refresh-based or event-based? Paul Rubin <no.email@nospam.invalid> - 2015-07-22 23:17 -0700
    Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 07:20 +0200
    Re: Design pattern: refresh-based or event-based? upsidedown@downunder.com - 2015-07-22 10:53 +0300
  Re: Design pattern: refresh-based or event-based? pozz <pozzugno@gmail.com> - 2015-07-22 07:32 +0200

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