> Morphic is a GUI. Its input handler should not have to deal with host-specific modifiers and just map keycodes to selectors (commands).

The representation of such user-input events is not necessarily specific to Morphic, only that #keyStroke: interface is. In the long term, it would be nice to move "UserInputEvent" etc. out of Morphic into its own base package. This is a matter of finding a consistent, object-oriented representation for user-input events. :-) 

I think the acual question is whether CTRL is a modifier key or not. As it appears here, CTRL does not only modify a key (character) but actually *modifies* a key (character). :-D Then, again, SHIFT does this, too. Hmmm...

Best,
Marcel
Am 16.12.2019 15:47:57 schrieb K K Subbu <kksubbu.ml at gmail.com>:
On 16/12/19 3:54 PM, Marcel Taeumel wrote:
> MyMorph >> #handlesKeyboard: evt
>    ^ true
> MyMorph >> #keyStroke: evt
>   (evt controlKeyPressed and: [evt keyCharacter = $c])
>       ifTrue: [self terminateApplication].
>
> Why? Because there might be the requirement to "terminate on ctrl+c" for
> some application and it would be nice if one could just implement it
> that way. :-)

Morphic is a GUI. Its input handler should not have to deal with
host-specific modifiers and just map keycodes to selectors (commands).

VM input plugin will parse CTRL+Q into keycode 16r11 to Squeak. Morphic
input handler will map this keycode to, say, #quitKey. so you should
just be able to write:

MyMorph>>quitKey
self terminateApplication

Later if we want to allow ALT+Q also to quit, then we just need to add a
single entry to the Morphic keycode map.

> But maybe I am confusing "characters" and "keys" again. Happens way too
> quickly.
It happens to me too, especially when working late into the night ;-).

I think of a keycode as a SmallInt (or sequence of SmallInts) that
encodes a Character or Symbol (selector), just like a machine word
encoding integer or oop.

Regards .. Subbu
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