On 02/09/2010 04:05 a.m., Ross Boylan wrote:
> On Wed, 2010-09-01 at 22:32 -0700, Andreas Raab wrote:
>> Hi Ross -
>>
>> Squeak 4.1 includes the Cuis editors and they are enabled by default. In
>> Squeak 4.1 you can actually switch the editor to use (mostly just so
>> that we have a fallback if something goes horribly wrong):
>>
>> 	"The old ParagraphEditor hierarchy"
>> 	TextMorph defaultEditorClass: TextMorphEditor.
>>
>> 	"The Cuis editor hierarchy"
>> 	TextMorph defaultEditorClass: SmalltalkEditor.
>>
>> In other words, choosing the Cuis editors as the basis is exactly the
>> right thing to do and should work in Squeak 4.1, 4.2 and Cuis.
>>
>> Cheers,
>>     - Andreas
> I believe the Cuis editors in squeak were based on a version of Cuis
> after the inheritance of classes from MVC was eliminated, but before the
> machinery was changed over to rely exclusively on Morphic.  So the
> actual operation remains substantially MVC.

Well, it doesn't rely on MVC, the Cuis version with that code had no 
traces of MVC left. But it does rely heavily on Sensor, as you say. That 
was cleaned in later versions of Cuis.

> For  example, the released squeak 4.1 image has the "cuis" editor
> SmalltalkEditor a subclass of Editor.  The initialize method of that
> class says
> 	sensor := InputSensor default
> and the code uses that sensor extensively.  So the class no longer
> inherits from MVC, but it still relies on MVC for many of the internals
> of operation.  And it makes relatively little use of the Morphic
> protocols for handling and managing events when it gets to managing the
> actual editing.
>
> In contrast the latest Cuis image (2.6) has none of that, using morphic
> protocols instead to manage and get keystrokes and other events.
>
> Ross

Right.

Cheers,
Juan Vuletich