[Oberon] frames, displays and screens;

[Andreas Pirklbauer]

That's in effect what virtual screens are. Question of course is how to initiate the jumping between virtual screens (other than via the command System.SetDisplay). I didn't want the scroll bar to extend above or below the visible part of the current virtual display or to clutter the display by introducing additional visual items (such as a small arrow somewhere at the top and the bottom of the current display that allows one to jump to the previous or next virtual display). One could though.. it would be a trivial addition.
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peter at easthope.ca peter at easthope.ca 
Mon Jul 4 17:14:37 CEST 2016   
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From:	Andreas Pirklbauer <andreas_pirklbauer at yahoo.com>
Date:	Sat, 2 Jul 2016 14:17:51 +0200
> In essence one can create sev=
> eral (separate!) logical display areas that all look like the standard Obero=
> n display (works like virtual screens in macOS, i.e. one can just switch fro=
> m one to another).

OK, thanks.  Rather than scroll a big display up-down and left-right 
on a smaller screen, the user will jump from one logical screen to another.  

Both scrolling and jumping could be in one system.  Eg. arrange your 
virtual screens vertically (or horizontally) and allow scrolling and jumping 
up/down (or left/right).

> It's just a small experiment to prepare Oberon for a tablet version. 

Seems you are on the right track.  Thanks!

              ... Lyall E.
              
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