[Cuis] StringMorph and lf

[Juan Vuletich]

Hi Dan,

On 1/29/2015 5:32 PM, Dan wrote:
> ...
> This is better - I especially appreciate #disableKeyboard. The cursor can not be inserted and
> although selection appears, copy and paste do nothing.

Change #2170 makes #disableKeyboard to _completely_  disable keyboard. 
But copy and paste work if invoked from the menu, right mouse click.

> The horizontal scroll bar does not
> appear and neither does the vertical, at least at first. But when the vertical is actually needed,
> it does not appear unless the window border is clicked. At times it loses track of the size of
> what needs to be scrolled.

The attach fixes this bug.

> The scroll wheel no longer works.

Yes, this is because the VM sends scroll wheel events as keyboard arrow 
keystrokes.

Maybe a better solution would be to just disable keystrokes that modify 
the text, but not others (arrow / scroll wheel, selection and clipboard 
commands, etc).

I won't be able to work on this for the next few days, so please open an 
issue at https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev/issues

Cheers,
Juan Vuletich
> Thanks,
>   - Dan

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