[Vm-dev] [OpenSmalltalk/opensmalltalk-vm] Linux Squeak VM X11 keyboard changes breaks 32b VM (#396)
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Wed Jun 12 16:19:20 UTC 2019
Side comment 2 from http://forum.world.st/Windows-cog-vm-Keyboard-events-related-about-keycode-mapping-td4330359.html
> @jvuletich: There is a completely separated issue, and it happens both in Windows
and Mac. Here, [ctrl] + [an alphabetic key] substracts 64 from the code.
So, [ctrl]+[c] generates code 3. This is consistent with the traditional
meaning of the ctrl key (in dumb terminals and DOS), but it makes
impossible for the image to tell (for example) between [ctrl]+[Enter]
and [ctrl]+[m]. The image might want to use these keystrokes for
different things, so it would be much better not to substract 64 in the
VM and let the image handle it. I know it could be done by handling key
down and key up events, but this would also require code that is not
only platform dependent but also needs to know the mapping between key
codes and characters in each platform.
In general, I think that [control], [command] and [alt/option] should
not affect the character code of a keystroke, they should only set the
appropriate flag so the image can decide what to do with them. This is
completely different for [shift], as [shift] does indeed modify the
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