Does not work at all

[petermott]

Hesitated before contributing this as it must be completely unsolvable - an oddity somewhere in my system. Still it can serve as a marker if others get the same result.

The script below shows what happens (i.e. nothing). There are no errors or warnings. This happens in RStudio with or without a separate graphics window and also using the RGui that is distributed with R. I tried omitting my .Rprofile and updating all packages but to no effect.

library(marquee)
library(grid)

# Make a plot
plot(mtcars$disp)

readme <- "Hello world?" 
a_grob <- marquee_grob(readme)

# Draw the grob but nothing happens
grid.draw(a_grob)

# A  rectangle drawn as expected
grid.rect(width=0.25, height=0.25, gp=gpar(fill="blue"))

My R is:

platform       x86_64-w64-mingw32               
arch           x86_64                           
os             mingw32                          
crt            ucrt                             
system         x86_64, mingw32                  
status                                          
major          4                                
minor          3.3                              
year           2024                             
month          02                               
day            29                               
svn rev        86002                            
language       R                                
version.string R version 4.3.3 (2024-02-29 ucrt)
nickname       Angel Food Cake 

The version of RStudio is:

RStudio 2024.09.1+394 "Cranberry Hibiscus" 
Release (a1fe401fc08c232d470278d1bc362d05d79753d9, 2024-11-03) for windows
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) 
RStudio/2024.09.1+394 Chrome/124.0.6367.243 Electron/30.4.0 Safari/537.36, Quarto 1.5.57

[teunbrand]

I can reproduce this on windows using the windows png device.
When I set the device in 'Tools > General > Graphics > Backend' to anything other than 'Windows', (e.g. Cairo PNG or AGG) the graphics renders with the text displayed in the upper left corner.

[petermott]

That fixes it.