[issue40856] IDLE line numbering should be light gray

[Terry J. Reedy]

Terry J. Reedy  added the comment:

When the question of changing default-x.def has come up before (and there are 
things I would like to change) the answer has generally been that we should 
not, a) because it would be too disruptive, including affecting exiting 
customizations, and b) because users already have the option of customizing.  
Most of the behaviors we change are not customizable, so we have to change the 
current behavior to give most people a better behavior, even if some people 
(including Raymond) object.

However, I will reconsider here since a) Tal, who I believe choose the current 
default, not only agrees with changing it by also the direction, b) 
line-numbers are only a year old, and, importantly, c) themes are saved as a 
whole, rather than as individual pairs, so that existing customizations will 
not be affected.  Even so, I expect that there will be people using IDLE 
Classic that prefer the current default.

If we are to change, we need specific foreground and background RGB numbers to 
replace the Current ones.  Raymond, Tal, and Cheryl if you want, please play 
with the line number (and future Shell sidebar) colors and propose something 
specific for general use.  (Raymond, I can imagine that you might prefer for 
projection with a particular system something different than you think is best 
for default screen use.)  I intend to post to idledev and maybe elsewhere to 
get other opinions (including for IDLE Dark).  Since I will not use whatever is 
chosen, my main concern is that we not choose something so light as to be 
unreadable by people like me with less than 'perfect' vision.

Related issue: the IDLE New theme was added years ago as a copy of IDLE 
Classic.  I presume the intent was to provide an alternative (light) default, 
but it was never modified, making it currently useless.  We should either 
delete it, while recognizing the name, or actually change it.  I have some 
ideas for the latter, but I presume Raymond intends this issue to be about 
changing IDLE Classic.

--
nosy: +cheryl.sabella
resolution: not a bug -> 
stage: resolved -> 
status: closed -> open

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[issue40856] IDLE line numbering should be light gray

[Tal Einat]

Tal Einat  added the comment:

I agree that the line numbers should be less prominent.

Terry, why not change the the default? ISTM we should strive to have good 
default colors, they are what most users use and see.

I also think we should improve the dark theme, but that's a separate issue.

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[issue40856] IDLE line numbering should be light gray

[Terry J. Reedy]

Terry J. Reedy  added the comment:

The line number sidebar colors are already user configurable.  We expected 
preferences for this to be as diverse as for anything else.  I changed them on 
my custom dark theme to dark blue on light blue, but I don't expect anyone else 
to like that.

Notepad++ black on white uses a slightly lighter gray on a very light gray (RBG 
about 233 versus 255 for white).  I think a background different from the text 
is a good idea.  In retrospect,  I might have suggested a default something 
more like N++,  but I am not currently willing to change the existing default.

--
nosy: +taleinat
resolution:  -> not a bug
stage:  -> resolved
status: open -> closed

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[issue40856] IDLE line numbering should be light gray

[Raymond Hettinger]

New submission from Raymond Hettinger :

In live code demos, the visual weight of the line numbers is heavier than the 
code next to it.  Instead, is should be light gray, just dark enough to easily 
locate a line of interest, and light enough to tune out while reading the line 
and surrounding code.   The current weight impairs readability.

--
assignee: terry.reedy
components: IDLE
messages: 370681
nosy: rhettinger, terry.reedy
priority: normal
severity: normal
status: open
title: IDLE line numbering should be light gray
type: behavior
versions: Python 3.10, Python 3.9

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