Limit on pixles in a group [ was: Re: Max number of columns in a datagrid?]

Alex Tweedly alex at tweedly.net
Tue Nov 27 19:24:23 EST 2018



On 27/11/2018 18:34, Richard Gaskin via use-livecode wrote:
>
> The existing field object does a fine job buffering for smooth 
> scrolling of just about any text of practical length.  Logically, the 
> limit of field contents is about 4GB (UINT4), but in practical terms 
> other memory needs may not allow quite that much.  FWIW I've loaded 
> the Bible into a field and it scroll quite nicely, much more smoothly 
> than Microsoft Word's paging scroll.
>
Yes, a scrolling field is fine. But if you wanted to have a field (no 
scroll bar) and other controls overlaid (or beside) the field and have 
the whole thing scroll (as a group), then you could run into the pixel 
limitation.
Wouldn't you ?   Or maybe I'm missing something.
>
> > And if we were to consider non-European languages, maybe that would
> > apply horizontally as well ??
>
> What non-European languages have no line wrapping?  How do such 
> languages display anything on any electronic or printed surface?
>
I didn't say "no line wrapping". There are (I think) languages which can 
be written vertically (e.g. Japanese, Korean), and in this case you get 
a series of vertical lines - and a series of those vertical lines placed 
adjacent to each other, requiring horizontal scroll to get through the 
document (i.e. a complete transposition of English). So the pixel limit 
night then be relevant for horizontal, just as it is for vertical.

But as you say - so long as you stick to scrolling the field, not 
putting an unscrolled field into a scrolled group, you won't hit the 
group pixel limit anyway.

And - since I can barely spell Unicode, far less understand all the 
implications - I'll go back to being quiet now :-)

Alex.




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