dhe@engr.uark.edu (David Ewing) (04/09/91)
HP48sx Program : TEXTVIEW
---------------------------------------------------------------------
Ever wished for a better way to view a large text string containing
new lines as if it was a 'text document'? Well, this program may be
what you've been looking for.
TEXTVIEW: A String viewing utility.
TEXTVIEW requires string that you wish to view on the stack -
an error message will be displayed otherwise. The string may contain
any number of new line characters (which of course indicate the end of
a line) and any number of characters per line (within memory limits),
but only 32 characters can be displayed per line.
Once TEXTVIEW is started it will analyze the string for lines,
the results of which are briefly displayed on the top line along with
the string size. After all the program initialization is complete,
which will depend on the string size, the screen will display the first
ten lines using the smallest text font; the smallest font is used to
display the most on the screen at once, however the only drawback is
that all the characters are displayed only in upper case. Six keys on
the keyboard now become active at this point:
Arrow up : Up one page (if not at the beginning)
Arrow down : Down one page (if not at the end)
Arrow left : Top of string/document
Arrow right : Bottom of string/document
Enter : Exit TEXTVIEW program
Blue/Right-Shift On : Turns off Calculator -Pressing ON resumes.
(Pressing any other key simply refreshes the screen just
to let you know that the HP really felt you press a
mostly-dead key :-)
As always in RPL programs, ON is active - but not really recommended as
an exit since it will leave one or two objects of its own on the stack.
TEXTVIEW will also not erase anything that was previously on the stack
besides the object that you wished to view.
VERY QUICK OPERATION SUMMARY:
--------------------------------------
On Stack Level 1: A string (e.g. "This is a string
with a line-feed in it")
Press the TEXTVIEW menu key or type 'TEXTVIEW'.
Arrow keys acts as page up and down, and ENTER quits
TO INSTALL:
---------------------
Simply strip off all this documentation until only the program
remains, then set the HP48 for a ASC transfer with translate code
3 set, and finally send it to the calculator. I recommend putting
it in the HOME directory so that it is available anywhere in the
directory structure.
COMING SOON (probably after this post!)
----------------------------------------------
TCAT: A text string catalog program; Nice User interface for
navigating directories and selecting a string variable
to view using this TEXTVIEW program.
#include <disclaimer.h>
"...this program shouldn't in anyway damage data, and if it does
I can't be held responsible - blame some other program...." :-)
-David
==============================================================================
dhe@engr.uark.edu David Ewing, University of Arkansas
dewing@uafhp.uark.edu Computer Science Engineering
Ensign, if you encounter any holes...steer clear.
-- Riker to Wesley, "Where Silence Has Lease",
stardate 42193.6
==============================================================================
--------------------->Cut Here and Download to HP<-------------------
%%HP: T(3)A(D)F(.);
\<< 0 1 1 1 1 0 \-> S a
b c l m
\<< CLLCD ERASE DUP
TYPE
IF 2 \=/
THEN DROP
"Invalid Object Type"
DOERR
END 'S' STO S
"
" + 'S' STO S
SIZE 'l' STO
"Size:" l \->STR + 1
DISP
WHILE S "
" POS
DUP 'b' STO 0 >
REPEAT S c b 1
- SUB S b 1 + l SUB
'S' STO 'm' 1 STO+
END "Lines:" m
\->STR + 2 DISP m
\->LIST 'S' STO 0 'l'
STO
DO 1 l + m l -
10 MIN l +
FOR a S a GET
1 \->GROB PICT SWAP a
1 + 'b' STO # 0d a
l - 1 - 6 * R\->B 2
\->LIST SWAP REPL
NEXT { # 0d
# 0d } PVIEW 0 WAIT
DUP { 25.1 35.1
34.1 91.3 36.1 51.1
} SWAP POS DUP
IF 0 \=/
THEN ERASE {
\<<
IF l 0 >
THEN 'l'
10 STO-
END
\>>
\<<
IF l m 1
- 10 / IP 10 * <
THEN 'l'
10 STO+
END
\>>
\<< 0 'l' STO
\>>
\<< OFF
\>>
\<<
WHILE l m
1 - 10 / IP 10 * <
REPEAT 1
'l' STO+
END
\>>
\<<
\>> } SWAP
GET EVAL
ELSE DROP
END
UNTIL 51.1 ==
END
\>>
\>>