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Holding a modifier key often also changes the character Gloss reports.

Say that I want to perform a certain operation when the L key is pressed, and thus pattern match on EventKey (Char 'l') Down _ _. If I then desire a slight modification in behaviour when the Shift key is pressed, I find that this branch isn't hit at all, since the character is L rather than l.

This behaviour is easy enough to work around, but can be quite annoying, and is fundamentally non-compositional. It would be great if there were an option to always report the same character as when no modifiers are held.

Hello! I've recently started figuring out gloss and was working on a project in xmonad. A couple days ago I switched over to swaywm to check it out, however I got an error ( freeglut (gloss-stuff): failed to open display '' ) whenever I tried to do stack run. Going back to xmonad it runs just fine, same for xfce. Has anyone else encountered this? I'm willing to try another wayland-based de and see if this problem is swaywm-specific or wayland-broad.

Looks like gloss-examples has a dependency on repa which cannot be built with newer versions of base (following the project website's instructions and using cabal).

Here is the issue: haskell-repa/repa#26

There is a PR open for repa to address this: haskell-repa/repa#27

GLFW repeatedly sends GLFW.KeyState'Repeating when button is held down - https://www.glfw.org/docs/3.3/input_guide.html#input_key.

It gets mapped to Up here:

GLFW.KeyState'Repeating should be just ignored and mapping should be GLFW.KeyState'Pressed to Down and GLFW.KeyState'Released to UP

I want to use gloss with ghci (either stack repl or cabal repl. The gloss window opens nicely but when I close it, it also closes ghci. In an old but report I saw that the gloss window can be closed with ESC which returns control then to ghci. When I try this I get:

<interactive>: interrupted
<interactive>: warning: too many hs_exit()s

and ghci is closed.

I saw some discussion about running gloss with some flags (??), but could not find a comprehesible and likely up-to-date instruction. What is the correct procedure to run gloss graphics in ghci and how to interact with the windows (especially how to close them without closing ghci ?
Thank you!

I work with ghc 8.10.7 and gloss 1.13.2.1 (lts-18.28