Re: Exploring Python for next desktop GUI Project

From	Terry Reedy <tjreedy@udel.edu>
Subject	Re: Exploring Python for next desktop GUI Project
Date	2014-07-24 19:25 -0400
References	<93c42547-557b-4839-baba-9ed54120595e@googlegroups.com> <CAPTjJmqHprvGkr-OH5botgAgm+9amrTunPnw74NrCjmWPy3AcQ@mail.gmail.com> <lqrhpn$1e3$1@ger.gmane.org> <CAPTjJmqyYv5t23ZDDn7b5kr0XtxERGEE=wGZH_h5YSuU3BNBzA@mail.gmail.com> <53D15A5F.6030907@g.nevcal.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.12305.1406244379.18130.python-list@python.org> (permalink)

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On 7/24/2014 3:11 PM, Glenn Linderman wrote:

> Not knowing any of these GUI platforms (although I've read some about
> Tk), I have some questions.
>
> * Which of them use UTF-8 as their native Unicode interface?

tk uses UCS-2 internally for the BMP subset. It does not display astral 
chars. tkinter iterfaces via with Python strings.

> * Which makes it easiest to discover and adjust font metrics such as
> kerning?

I believe tk can use whatever fonts are on the system. Idle gives me a 
choice of more than I want to look at.

Tk does kerning with proportional fonts, but I believe info and control 
is not user acccessible. The main available metrics are max ascender and 
descender sizes, for interline spacing.

> * Which makes it easiest to obtain bounding rectangles of a piece of text?

The Text.bbox(index) returns the bounding rectangle for a character. 
Those can be combined as desired.

> * Which makes it easiest to use a set of fonts such as Times (for Latin)
> and others for Cyrillic, Chinese, and Korean? Or which supplies a font
> configuration that can "just be used" for any language?

'any language' requires a nearly complete unicode font. One can tag 
character sequences, and configure properties, including color and font, 
that override the widget defaults. This is how Idle colorizes Python 
code by syntax category. One could just as easily tag by language or by 
alphabet.

-- 
Terry Jan Reedy

Thread

Exploring Python for next desktop GUI Project Noble Bell <noblebell@gmail.com> - 2014-07-24 08:57 -0700
  Re: Exploring Python for next desktop GUI Project INADA Naoki <songofacandy@gmail.com> - 2014-07-25 01:20 +0900
  Re: Exploring Python for next desktop GUI Project Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-07-24 11:22 -0500
    Re: Exploring Python for next desktop GUI Project Grant Edwards <invalid@invalid.invalid> - 2014-07-24 16:37 +0000
      Re: Exploring Python for next desktop GUI Project Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-07-24 13:17 -0500
  Re: Exploring Python for next desktop GUI Project Chris Angelico <rosuav@gmail.com> - 2014-07-25 02:18 +1000
  Re: Exploring Python for next desktop GUI Project Noble Bell <noblebell@gmail.com> - 2014-07-24 09:29 -0700
    Re: Exploring Python for next desktop GUI Project Chris Angelico <rosuav@gmail.com> - 2014-07-25 02:46 +1000
    Re: Exploring Python for next desktop GUI Project Michael Torrie <torriem@gmail.com> - 2014-07-24 15:38 -0600
  Re: Exploring Python for next desktop GUI Project Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2014-07-24 19:04 +0200
  Re: Exploring Python for next desktop GUI Project Chris Angelico <rosuav@gmail.com> - 2014-07-25 03:09 +1000
  Re: Exploring Python for next desktop GUI Project Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-07-24 19:04 +0100
  Re: Exploring Python for next desktop GUI Project Chris Angelico <rosuav@gmail.com> - 2014-07-25 04:15 +1000
  Re: Exploring Python for next desktop GUI Project Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-07-24 13:33 -0500
    Re: Exploring Python for next desktop GUI Project Grant Edwards <invalid@invalid.invalid> - 2014-07-24 21:17 +0000
  Re: Exploring Python for next desktop GUI Project Chris Angelico <rosuav@gmail.com> - 2014-07-25 04:51 +1000
    Re: Exploring Python for next desktop GUI Project Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-07-25 10:28 +1200
  Re: Exploring Python for next desktop GUI Project Chris “Kwpolska” Warrick <kwpolska@gmail.com> - 2014-07-24 21:02 +0200
    Re: Exploring Python for next desktop GUI Project Grant Edwards <invalid@invalid.invalid> - 2014-07-24 21:24 +0000
  Re: Exploring Python for next desktop GUI Project Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-07-24 14:10 -0500
  Re: Exploring Python for next desktop GUI Project Glenn Linderman <v+python@g.nevcal.com> - 2014-07-24 12:11 -0700
  Re: Exploring Python for next desktop GUI Project Ian Kelly <ian.g.kelly@gmail.com> - 2014-07-24 13:32 -0600
    Re: Exploring Python for next desktop GUI Project Noble Bell <noblebell@gmail.com> - 2014-07-24 13:10 -0700
      Re: Exploring Python for next desktop GUI Project Rob Gaddi <rgaddi@technologyhighland.invalid> - 2014-07-24 13:46 -0700
  Re: Exploring Python for next desktop GUI Project Zachary Ware <zachary.ware+pylist@gmail.com> - 2014-07-24 15:13 -0500
  Re: Exploring Python for next desktop GUI Project Michael Torrie <torriem@gmail.com> - 2014-07-24 15:24 -0600
  Re: Exploring Python for next desktop GUI Project Michael Torrie <torriem@gmail.com> - 2014-07-24 15:29 -0600
  Re: Exploring Python for next desktop GUI Project Michael Torrie <torriem@gmail.com> - 2014-07-24 15:32 -0600
  Re: Exploring Python for next desktop GUI Project ismeal shanshi <stuffstorehouse2014@gmail.com> - 2014-07-24 14:44 -0700
  Re: Exploring Python for next desktop GUI Project Terry Reedy <tjreedy@udel.edu> - 2014-07-24 19:25 -0400
    Re: Exploring Python for next desktop GUI Project wxjmfauth@gmail.com - 2014-07-26 00:48 -0700
  Re: Exploring Python for next desktop GUI Project Terry Reedy <tjreedy@udel.edu> - 2014-07-24 19:35 -0400
    Re: Exploring Python for next desktop GUI Project Noble Bell <noblebell@gmail.com> - 2014-07-25 06:37 -0700
  Re: Exploring Python for next desktop GUI Project Sturla Molden <sturla.molden@gmail.com> - 2014-07-25 20:04 +0000
  Re: Exploring Python for next desktop GUI Project CM <cmpython@gmail.com> - 2014-07-27 10:53 -0700
    Re: Exploring Python for next desktop GUI Project pecore@pascolo.net - 2014-07-29 00:00 +0200
      Re: Exploring Python for next desktop GUI Project Roy Smith <roy@panix.com> - 2014-07-28 18:01 -0400
        Re: Exploring Python for next desktop GUI Project pecore@pascolo.net - 2014-07-29 21:47 +0200

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