Thread View: vmsnet.tpu
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Started by williams
Tue, 22 Dec 1992 13:13
Rectangular Highlighting
Author: williams
Date: Tue, 22 Dec 1992 13:13
Date: Tue, 22 Dec 1992 13:13
38 lines
2737 bytes
2737 bytes
> From: "kacovert@miavx1.acs.muohio.edu" 22-DEC-1992 01:19:04.64
>
> The selection should be in bold rather than inverse video. The
> selection also looks like it's selecting lines, but trust me, it'll
> work (BTW, why doesn't box selects highlight boxes rather than lines -
> this doesn't make sense to me.) Then issue the cut command.
>
> Kent Covert, Software Coordinator
> Miami Computing and Information Services
EVE's highlighting in character mode rather than block mode
is probably due to a couple of things:
1. The TPU engine underneath EVE does not currently
support blocks. The block mode work is done pretty
much by EVE, which does not have any display control.
2. The difficulty of highlighting a block is pretty
significant, especially if you do it in EVE.
Imagine a block selection that's 100 lines high and 10
characters wide. Your cursor is in the lower righ-hand
corner. Now, move the cursor one character to the right.
The EVE code would have to update all the ranges in a 100
range array. Now, imagine you've decided to hold the
cursor down for 3 seconds, engaging auto-repeat for 2.5 of
them....
There's also the problem of what to do (in the display) if
some lines are not as wide as the selected range.
Freely hypothesizing,
-Tom Williams
Computer Center Manager
Alderson-Broaddus College
WILLIAMS@AB.WVNET.EDU
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