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CU Amiga Magazine's Super CD-ROM 04 (1996)(EMAP Images)(GB)(Track 1 of 3)[!][issue 1996-11].iso
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jbtree.txt
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1998-01-18
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JBTree
Version 4.2.6
(c)JBSoft 1992-6
This is a program which displays the directories and files on any disk
(internal or external). It shows the current directory and other
directories at the same level, plus any directories immediately
subordinate to the directory on which the cursor is on. It also
displays the files in the current directory - the date will take the
same format as that set in the Time application. The program is free
for your use but I retain all copyright on the code (where applicable
- some of the Pack information was provided by Wolfgang Schirmer and
Matthew Millar - thanks).
N.B. If you can't be bothered to plough through this document please
note that Copy, Move etc. only work after you have Marked the
file using the Space Bar or the Enter key. Also, for
installation, please read that section or you'll be sorry <g>!
Background
----------
This utility was first started in the days of the Series 3 but I only
got it to a reasonable state on the appearance of the Series 3a. It
has been translated, and therefore will only run in its present state,
on an S3a although I suspect it could be adapted to compile and run on
an S3 with some compromises. There are some limitations which I
suspect you will discover as you use it.
Manual and Usage
----------------
This started as work in progress (I suppose, as I kept changing it for
the first few years) and so it comes without a proper manual as I
didn't start writing this until the program was too large to start
documenting it from scratch (I don't really have the time or
inclination to write a proper one). This document is getting close to
turning into a manual as I expand on it. Help is available on the HELP
key at most times and, as with most OPL programs, you can escape using
Psion-Esc or Psion-X at almost any time.
The history information is in a file called JBTHISTR.TXT.
Installation
------------
The files listed below should be part of the JBTree ZIP file:-
JBTREE.OPA - The main part of the program
JBTL.DBF - Install if Launch is to be installed
JBTREE.DBF - Data file required for View/Run options
JBT.DBF - My example file of JBTREE.DBF (included as part
of the explanation - should not be installed
JBTREE.TXT - This file/manual
JBTHISTR.TXT - History text of changes
Copy JBTREE.OPA to any directory (normally \APP\ but this is not
mandatory) and install it in the usual way using Psion-I. If you
require to view files using their native application then the file
JBTREE.DBF should also be placed in the \APP\ directory. When JBTree
is first run the file is moved to a sub-directory off the directory
JBTree is installed in called \JBTREE\ (e.g. \APP\JBTREE\).
This sub-directory drive for the configuration files can be chosen
and, if the JBTREE directory does not exist, then a dialog to choose
the drive will be given. The directory should be created automatically
- if not, it is permissible to generate it manually. Please note that
if the parent directory (normally \APP\) does not exist then this
automatic installation may fail.
If you are updating your version then you will have to manually move
the configuration files to the appropriate directory although it is
not normally necessary to copy any of the other files unless the
history file indicates the format of the files have altered. The
program looks for these additional files in a directory off the
directory that JBTREE.OPA is in (i.e. if JBTree is in \JBT\ then the
configuration files MUST be in the directory path \JBT\JBTREE. This
path can, however, be on a different drive to that of the OPA file.
If you require the Launch menu then JBTL.DBF should also be placed in
the \APP\ directory. This will be moved to the appropriate directory
by the main program when it is first started.
N.B. Care should be taken when upgrading the program - no datafiles
will be overwritten if they already exist in the \JBTREE\
directory when the program is started. If you wish to upgrade (or
replace) the datafiles then the original datafiles in the
\JBTREE\ directory must be deleted first or the files concerned
manually transferred to this directory.
JBTL.OPO which was required for version 4 and 4.1 is not now
needed and will be automatically deleted when JBTree is first
run.
Starting the program
--------------------
To start the program place the cursor on the JBTree word and press
Enter to start the program.
After starting the program you are prompted for a Drive - if the 3-
Link is active then, before the drive menu is accessed, a choice of
Local or Remote is given. Remote means drives on the remote computer.
If the drive you wish to access is not shown on the menu then press
Esc and you can then select almost any drive (including the ROM) with
the dialog displayed at this point.
N.B. If the letter keys (e.g.'F') do not appear to work or do not work
as expected, check that you do not have CAPS LOCK on. The S3a is
case sensitive on the keys checking. Unfortunately, unlike the
good old Organiser II, it does not appear possible to alter the
state of the CAPS LOCK from within the program using OPL so
please be sure that this is switched off whilst using the
program.
Keys Used
=========
General
-------
: Up
: Down
PgUp: Page Up
PgDn: Page Down
Ctrl-Psion-Up/Home: 1st Dir
Ctrl-Psion-Down/End: Last Dir
Tab: Files/Dir switch
Diamond: Files/Dir switch
Psion-J: Info (About)
Psion-S: Sort
#(character key): Goto dir/file
Psion-Shift-C: JBTree Config
Psion-Shift-F: View Config
Psion-U: Update Directories/Files
Psion-F: Pack Info
Shift-Psion-I: Directory Info
Shift-Psion-L: Launch sub-menu
Psion-X: Exit
In Directory Tree
-----------------
Psion-D: Change Drive
: Sub-Dir
: Up-Dir
Psion-+: Add Dir
Psion--: Del Dir
Psion-C: Copy Dirs
Psion-M: Move Dirs
Psion-R: Rename Dir
Psion-Shift-D: Delete Dirs
Psion-L: Look for File
Psion-A: Look again
Ctrl-A/B/M: Quick drive change
In Files List
-------------
Psion-I: Toggle Files Info
Psion-T: Mark All Files
Psion-Shift-T: Unmark All Files
Space: Mark file toggle
<CR>: Mark toggle + Move down
Psion-D: Delete
Psion-C: Copy
Psion-(Shift)M: Move (& Rename)
Psion-R: Rename
Psion-Shift-R: Copy & Rename
Psion-A: File Attributes
Psion-N: Info
Psion-(Shift)V/Psion-H: View file(in Word)/Hex
Moving Around
-------------
Use the cursor keys in the normal way. To go to a sub-directory use the
right arrow key, to go to the parent directory above the present one use
the left arrow key. To flip between the Directory list and the Files list
use Tab or the Diamond key. If in the Files list then Escape will also take
you to the Directory list. To change the drive use Psion-D whilst in the
directory list. An alternative, if just the local drives are required, is
to use Ctrl-A -B or -M. This bypasses the dialogs and so speeds up the
selection a little.
It is possible to jump to a directory or file within the current list by
using 'c' where 'c' is the first character of the name to find.
Create/Delete/Rename Directories
--------------------------------
It is possible to create new directories by positioning on the directory to
which the directory to be created will be subservient and then using Psion-
+ (the Psion key along with the '+' key). Deletion of a directory (which
must be empty of files) is achieved by using Psion-- (the Psion key
together with the '-' key). It is also possible to delete a whole sub-
directory tree (including any files) using Psion-Shift-D. To rename a
directory, place the cursor on the directory to be renamed and press Psion-
R. A dialog will display showing the old name and prompting for the new one
(the default display shows the same name as the old). After entering the
new directory name, press return and (eventually) the screen will display
showing the new directory name.
Copying/Moving/Deleting
-----------------------
When in the File list the required files must be selected by using either
the Space bar or Enter before any action can be taken. After marking the
selection is denoted by a star beside the filename. The keys used for
marking can also be used to deselect a file in the same way (they act as a
toggle). All files in the current directory can be marked using Psion-T and
deselected using Psion-Shift-T.
Once the files have been marked then use of Psion + C/M/D will either
copy/move or delete the selected files. If copy or move are selected then
the display will re-display the directory tree and you should move to the
appropriate destination drive and directory in the usual way before
pressing Enter. You can create new directories whilst in this selection
mode. Enter will activate the copy or move. If you require to Copy or Move
together with Renaming the file - use Psion-Shift-R for Copy & Rename and
Psion-Shift-M for Move and Rename.
It is possible to bring up a dialog to enable the input manually of the
destination directory. Use Ctrl-Psion + C/M to do this. If the destination
as typed does not exist then the option to make it is shown. Escape at any
point will take you back to the normal choice method of choosing the
destination directory.
The program will do bulk copying/moving/deleting of directories using
Psion+C/M/Shift-D. When copying or moving an option is given to use the
existing directory or not. What this means is that the data in the top
directory chosen to copy or move will either go into the destination
directory chosen or will create a directory below the destination directory
and use that. (e.g. Source directory = A:\JBTREE : Destination directory =
A:\DOS. If Existing is chosen then the files in the JBTREE directory will
end up in the DOS directory and any sub-directories will be created below
the DOS directory; If Existing is not chosen then a directory called JBTREE
will be created as a sub-directory of DOS and the files moved accordingly.)
The number of files marked and the combined size of them is displayed using
Shift-Psion-I.
Other options
-------------
Files can be renamed by highlighting them using the cursor and pressing
Psion-R. A dialog is displayed allowing the name and/or the extension to be
changed.
File attributes can be reset using Psion-A once the files to be changed
have been marked. If no file is marked then the attributes for the current
file under the cursor is shown. If Escape is pressed (rather than return)
when in the Set dialog then the viewing is abandoned. Changes are made
using the Enter key once the dialog has been set as required. The
attributes set will alter all the programs marked without further querying.
This is primarily to facilitate bulk changing of attributes - alter the
files on an individual basis if different attributes are to be set for each
file.
Finding a file
--------------
It is possible to find a file on a particular drive. By pressing Psion-L a
dialog shows prompting for the file to find. This need not be the full name
but just sufficient to identify the file. If the file is found the display
will stop on that directory. If the search is be resumed use Psion-A to
continue the existing search. Because of the potential for continuing the
search I have had to get all the directory names before starting the search
and the screen will reflect this delay before the search is commenced.
Only the current drive is searched - to search other drives you must first
move to the required drive before implementing the search. Wildcards are
implemented.
Viewing a file
--------------
One thing that may not be clear from the help page is that it is possible
to View or Launch files with the aid of a configuration database file
called JBTREE.DBF. This can be configured from within JBTree using Psion-
Shift-F. It will Launch anything (including things like Notepad and Macro)
given the correct configuration. There are four fields in the configuration
file:
1. Extension - this is the extension the launch utility will use
to determine which database record in JBTREE.DBF
to use. When launching a file the database is
searched for an extension which matches that of
the file to launch.
2. Run filename - this is the program to run in conjunction with the
file selected (e.g. WRD extension should use
ROM::WORD.APP). Any OPO or OPA file should use
ROM::SYS$PRGO.IMG.
3. Extra filename - This field is for use with OPA files that use file
lists (e.g. Notepad). If this field is used then
it is probable that the Run filename will be
ROM::SYS$PRGO.IMG.
4. Alias Info - currently the only program that would use this
field is WORD unless there is a 3rd party
application of which I am unaware. The two .ALS
files (PROGRAM and SCRIPT) in the ROM should not
be called explicitly - they are loaded as required
according to the alias data. Briefly:
The first letter specifies Program or Script
(either O or S) - the second letter specifies if
RUN is allowed and the next three letters give
both the top directory any compiled programs are
placed in and also the files extension.
A text editor can be started by using the alias
character of $.
For examples see the enclosed JBT.DBF file for examples of using the
fields. This is actually my configuration file but gives you a clue as
to what to do. The working configuration file should be called
JBTREE.DBF and exist in a directory called JBTREE. This, in turn,
should exist as a sub-directory off the directory in which JBTREE.OPA
exists. It must also be on the same drive.
If you are upgrading the program from a previous version then the new
directory will be automatically made and the file moved. If this is a
first installation then you could copy both the .APP and .DBF files to
the same directory and the rest of the creation and moving will be
automatic when the program is first run, or you could manually create
the directory and move the file into it.
Because I use the Data application to access this file for alteration,
if my file is not used as a starter, then the Field titles will have
to be typed in manually. I have included a JBTREE.DBF file which is a
Data file with just the built-in applications and the field names
included.
To use the launch utility place the cursor on the file you require to
view/run and press Psion-V. If the Extension does not exist in the
database then an option to use Word will be given. It is also possible
to force the use of Word at all times by using Psion-Shift-V instead
of Psion-V.
Once the file has been opened it must be closed in the normal way for
that program (usually Psion-X) otherwise, once you return to the
System screen, the file will still show as open, but not necessarily
under its normal icon.
N.B. There is a problem with any Icon or Title that is normally
displayed on a status screen when launching programs in this way.
This is very difficult to solve for every case as, to do so,
would rely on the program in question having been installed on
the System screen - those that are should have their icons
displayed correctly but others will not.
There does not appear to be a way round this problem (unless
someone knows of a fix of which I am unaware).
Hex View/Edit
-------------
To view or edit in a Hex or 'Dump' format then use Psion-H. To exit
from the procedure use Psion-X.
Move around the display using the cursor keys and switch between the
Hex and ASCII columns using the Tab key.
To toggle between Edit and View use Psion-E. It is possible to edit in
the ASCII display as well as the Hex display.
To jump to a new location use Psion-J - the location should be
inputted in Hex digits.
To search within the file use Psion-F. If you are in the Hex part of
the display then input Hex characters (0-9,A-F) - the A-F characters
can be typed in lower case - the program will automatically convert.
If in the ASCII section then ASCII characters can be searched for.
Case is important in this instance. To search again for the same data
use Psion-G.
A menu similar to the others in this program has now been implemented
which works in the usual Psion way and should be self-explanatory.
N.B. For those of you who think in Hexadecimal - the hex figure given
for the end of the file may appear to be one less than that
reported on the files list and info. This is because, on the
HexEdit screen, the first byte is classed as zero rather than
one.
Display
-------
There are two forms of display - one with file information shown and
one without. The font size is altered accordingly and a larger font is
used if the file information is not shown. To switch between the two
formats use Psion-I. If the information is not displayed then
individual file information can be shown by placing the cursor on the
file and pressing Psion-N.
The directories and files can either be shown sorted or unsorted. This
toggle is operated by using Psion-S.
Both of the above options can be made to be permanent so that the
program always starts up in the same manner by using Shift-Psion-C.
This displays a dialog with the two options. The result of this dialog
is saved in a JBTREE.CFG file in the JBTREE sub-directory.
To refresh to display (of use after an alteration which does not
rewrite the screen) use Psion-U.
SSD Pack information can be displayed using Psion-F. Please note that,
although information on the Internal drive can be displayed, this may
not be totally accurate in terms of size and amount left as the
internal Ram is dynamically sized according to program requirements
(i.e. the more programs you have running, the smaller the drive will
be). The dialog may take a little time to appear as it has to
calculate reclaimable space.
The number of files and the space they occupy can be displayed using
Shift-Psion-I - in the file display this will also show the number of
marked files and their combined size.
Launch Sub-Menu
---------------
There is an optional sub-menu available for Launching applications
(APP/OPA/OPO). This option appears on the Sundry Menu and will only be
shown if the file JBTL.OPO is present in the correct directory
(normally JBTREE off the directory in which JBTree resides).
On selecting this option (using Shift-Psion-L) a menu is displayed
with up to 40 programs on it. They will be displayed in the order they
appear in the JBTL.DBF database. The final two options on the menu
cards are to return to JBTree or to configure the programs.
The configure options are to Add or Edit. Edit will just run the
machine's Data program with JBTL.DBF as the file to launch with. Add
presents a dialog which allows selection of the Application (the
default drive is actually ROM:: although the Drive is shown as
Internal); the datafile (if required); and a key which will appear as
the short-cut key on the menu. To provide a Psion+key short-cut use a
lower case character - Upper case will give the Shift+Psion+key
option. If a short-cut key is chosen that is already in use you will
be thrown back to the dialog, otherwise, on pressing Enter, the new
data is saved to the database and the Menu will be shown again.
If the cursor is in the file list then you can use the highlighted
file as the launched file with the selected item. To do this the file
field in JBTL.DBF needs to be just a '*' character.
Speed
-----
The program is not the fastest in the world (primarily because it is
written in OPL rather than 'C'). The fastest setup would be with Sort
and File information Off (although Sort does not effect the speed
greatly). To achieve this fastest option - once in the directory tree
press Psion-I and then Psion-S (or use the configuration option so
that the program remembers the setup [^C]). The configuration file
(JBTREE.CFG) created when using ^C will exist in the same directory
as the JBTREE.DBF file. The directory and file are created if they
don't already exist. The .CFG file is not required for the running of
the program and, if you never press Psion-Shift-C, it will not be
created.
Exiting the program
-------------------
You can exit instantly with Psion-Esc or Psion-X wherever you are in
the program.
Limitations
-----------
At present the program is limited to:
640 Directories
640 Sub-Directories
640 Files per Directory
If these specifications are insufficient, please let me know - it is
possible to increase them subject to RAM availability (and Operating
System limitations) on your machine.
The program uses about 60kb of RAM when running but this is somewhat
dependant on the size of the SSD and the number of directories and
files that are on it as variables are dynamically sized. Because of
this, it is impossible to give accurate estimations of memory usage.
The maximum I have come across is approximately 70kb but, if you have
a larger sum, let me know and I'll update this section.
There may be other limitations of which I have not thought - if you
wish to augment this section please contact me by e-mail via the
methods listed at the end of this document.
Thanks
------
Thanks are especially due to Wolfgang Schirmer and also to Tom
Dolbilin, Matthew Millar and Steve Litchfield for their continued help
with my projects and assistance with debugging. Without people like
these my programs would be unusable!
Disclaimers
-----------
I presume there are still some bugs as it is a very complex program
with many Procedures. I think I've cleared up most of the nasty ones
though. If you have any questions regarding the operation of the
program I will try to help you and I'm always open to suggestions for
improvements (I reserve the right not to implement them though).
Please report any bugs found as soon as possible so that I might try
to clear them up.
As is usual with programs of this sort, I shall not be held
responsible for any loss of data (or damage to the hardware?), however
caused, as a result of using this program. The user must take
responsibility for his actions and uses the program at his own risk. I
reserve all rights of copyright to the program although payment is not
required to use it.
Because I now translate the program outside of the S3a environment I
am able to entertain ideas for improvements from users. Previously, I
was very tight for programming space but this has largely been cured.
If you have any suggestions for improvements please contact me via the
e-mail options at the end of this file.
Enjoy!
Contact
-------
John Boyce
CompuServe: 100014,1240
CIX: jboyce@cix.compulink.co.uk