Here is how it looks on my machine:

https://vimeo.com/241738557

On Tue, 7 Nov 2017 17:57:27 +0000
Erich Rast <er...@snafu.de> wrote:

> I thought this was a known bug that just never gets fixed. This has
> given a black canvas when you click into the editor on my machine for
> ages:
> 
> #lang racket/gui
> (define testframe%
>   (class frame%
>    
>     (define (init-layout)
>       (letrec ((t (new text%)))
>       (void (new editor-canvas%
>                  [parent this]
>                  [editor t]
>                  [style '(transparent)]))))
>     (super-new)
>     (init-layout)))
> 
> (define frame (new testframe%
>                    [label "Editor Canvas Test"]
>                    [width 400]
>                    [height 400]))
> 
> (send frame show #t)
> 
> On Tue, 07 Nov 2017 17:44:07 +0000
> Stephen De Gabrielle <spdegabrie...@gmail.com> wrote:
> 
> > If you pop you code on pasterack or a gist I’ll test on OS X and
> > windows
> > 
> > S.
> > 
> > On Tue, 7 Nov 2017 at 15:49, Erich Rast <er...@snafu.de> wrote:
> >   
> > > Hi!
> > >
> > > This is something I've been wondering for a while already but
> > > never had time to ask.
> > >
> > > When an editor-canvas% is set to transparent in its style list,
> > > and I type in it, then the whole editor gets black and nothing
> > > can be seen.
> > >
> > > Shouldn't it be gray, as the window background so it looks as if
> > > you type directly on the window?
> > >
> > > For my purposes, I could set the background color directly
> > > in a non-transparent editor-canvas%, but I see no
> > > platform-independent, Racket-native way of obtaining the exact
> > > window background color. Do I need to implement changes in the
> > > on-paint method? Is the black canvas desired behavior?
> > >
> > > [tested on Linux Mint 18.2 Cinnamon 64 bit, Cinnamon Version
> > > 3.2.7, Radeon R9 280X graphics card]
> > >
> > > Best,
> > >
> > > Erich
> > >
> > > --
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> > >    
> 

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