Re: [racket-users] Strange gray lines in DrRacket editor

2017-09-21 Thread Neil Van Dyke
One possibility is that Racket was working with GTK3 before, but GTK3 
broke that (or broke your GTK3 theme) in a newer version.  I've heard 
developer complaints about this, and about engineering culture changes 
and politics.


Firefox might be a good example to look at.  Some URLs that don't 
involve cursing or intrigue:

https://wiki.archlinux.org/index.php/firefox#Firefox_looks_bad_with_GTK.2B_.3E.3D3.20
https://bugzilla.mozilla.org/show_bug.cgi?id=1268234

I no longer have a good long-term recommendation for open source desktop 
GUI toolkits; maybe next year.  For now, I go to some trouble to use 
GTK2 apps whenever possible.


The good news: for most of us developers using Racket on GNU/Linux, one 
nice side-effect of the Racket cross-platform desktop GUI stuff is that 
we don't have to decide whether to code for GTK2/GTK3/Qt/etc. -- we can 
shift all that pain onto Matthew, et al. :)


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[racket-users] Strange gray lines in DrRacket editor

2017-09-21 Thread Luis Sanjuán
Hi again, Jaroslaw and everyone concerned.

I have investigated a bit further on this issue. This is a quick report of my 
findings thus far. If I can provide more useful information, I'll do it in a 
new post.

To summarize what I have found.

1. Artifacts are still there, though mitigated, even after applying the last 
proposed workarounds.
2. At least on Unix systems, the issue seems to be completely fixed by falling 
back to GTK2.

More details.

* Basic Machine description

Platform: Dell XPS 13 9360. Graphics: Iris Plus Graphics 640 driven by the i915 
module (default chipset settings)

OS: Ubuntu 16.04.3 (Linux kernel: 4.10.0-33-generic)

* Description of the issue

Ghosting lines and/or little squares screen artifacts appears on the drracket 
canvas while scrolling. Much more prominent when text is scaled and/or when 
graphical objects like comment boxes are included in the code.

* Fix

On Unix systems, falling back to GTK2 when running drracket seems to completely 
fix the issue:

PLT_GTK2=1 drracket

Jaroslaw, I don't know about Windows but if you can do something like this when 
running drracket, you may fix the problem by now.

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[racket-users] Strange gray lines in DrRacket editor

2017-09-09 Thread jaroslaw . modry

Recently I installed racket 6.10 (Windows version) on my new laptop (OS is 
Windows 10 Creators Update) and I noticed strange gray boxes when writing 
programs in the DrRacket editor (see picture attached).
I assume it's related to my  DPI settings which is set to 125% in the 
Display settings dialog, and the resolution is set to 1920 x 1080 which is 
equal to real resolution on my 14' laptop screen.

Since other apps on the same machine don't exhibit any display problems, i 
suppose this is a bug in DrRacket so I report it here in the hope that it 
will be resolved in the new version of DrRacket.

Best regards,
Jaroslaw Modry


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