home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Datafile PD-CD 3
/
PDCD_3.iso
/
pocketbk
/
utilsf
/
jbdata
/
JBDATA1.TXT
< prev
next >
Wrap
Text File
|
1995-08-10
|
31KB
|
730 lines
JBData Page 1
----------------------------------------------------------------------
JBData
Version 1.4
(c)JBSoft 1994/5
³
ÃÄ¿
ÀÂÁÄÙ
ÀÄ¿
ÄÄÙ
Description 2
Installation 2
Operation 2
Marked Records List 15
Edit Window 18
Link/Paste 19
Help 20
Thanks 21
Get-out 21
Limitations 22
Known Problems 22
Contact 22
Index 23
JBData Page 2
----------------------------------------------------------------------
Description
-----------
JBData is a free application for the enhanced display of database
files (either those created by Data or those made by an OPL program).
If the data file has fields made up of types other than strings then,
after editing, a simple check will be made to check that the field is
still acceptable in its original form (the editor only works on text
so conversions take place before and after edits).
The program allows for extra display modes, sorting of the file,
better search utilities, a simple password system and other
improvements (but see the section called 'Known Problems').
Installation
------------
1. Copy JBDATA.APP to any \APP\ directory.
2. From the System screen navigate to the place you wish to
install the application on the System screen and press
Psion-I.
3. Select the drive on which JBDATA.APP resides using the left
and right cursor keys.
4. Select JBDATA.APP in the file list using the up and down
cursor keys.
5. Press Enter.
The application will install on the screen at the chosen place. A file
list of Data files that are in the \DAT\ directories on all drives
will be displayed under the JBData icon in the same way as they are
under Data.
There is no need to remove Data for JBData to work but, because of the
vague similarity of icons, some care should be exercised that the
required application is selected before running it.
Operation
---------
To start the application highlight a file under the JBData icon and
press Enter.
Alternatively, on any file under the JBData icon, press Tab and
navigate to the file you wish to open using the cursor keys and Enter.
Once the cursor is on that file, press Enter twice (the first press
will show a dialog with the name of the file inserted - the second
press will open that file).
N.B. There is a possibility that, if there is insufficient memory
available to run the application, you may be presented with a
blank screen. If this happens just press Psion-Esc. This will
take you back to the System screen where you can close down some
applications to free some memory. I have intercepted this problem
as much as possible but have been unable to eliminate it
completely.
JBData Page 3
----------------------------------------------------------------------
N.B. From version 1.3.1 the method of storing the setup has changed -
this should speed up the opening of the data files but, the first
time a file is opened that was previously configured with an
earlier version of JBData, the opening will be slower as a
conversion takes place. Subsequent openings will then be faster
than before (about twice as fast).
When the application is running use the following keys to operate it.
Movement
--------
Down - moves to the next record. In Page mode, if at the
last record, will move to the first record.
Up - moves to the previous record. In Page mode, if at
the first record, will move to the last record.
PgUp - In Line mode shows the previous page of records.
PgDn - In Line Mode shows the next page of records.
Ctrl-PgUp - Show the first record in the file.
Ctrl-PgDn - Show the last record in the file.
Left - In Line mode moves the display one field to the
left.
Right - In Line mode moves the display one field to the
right.
Home - In Line mode moves the display to the first field.
End - In Line mode moves the display to the last field
with data.
Enter - Either move to next record or toggle the Page/Line
mode display (depending how set with Shift-Psion-R).
Shift-Enter - Move to previous record (dependant on state of
Shift-Psion-R).
Esc - One press clears the quick find.
Two presses in quick succession will clear the line
display back to the frozen fields (if any are
defined) and the next field. This is a quick method
of resetting the visible fields to a consecutive
sequence starting with field one.
Tab - In Page mode this will allow the use of the cursor
keys for missing lines to be scrolled onto the page
using the cursor keys.
- In Line mode this key finds the next match for
QuickSearch (this option is available in Page mode
using Psion-Tab).
Open File Psion-O
---------
This option opens a previously existing file. If the file has been
previously opened in JBData, configured, and that configuration saved,
then this configuration will be used to setup the display. Any
Datafile created by Data, JBData, or an OPL program can be opened. At
the moment I know of no datafile that cannot be opened by this
application. If you come across one please let me know.
If a password has been set then this will be prompted for before the
file will open.
Merge File Psion-M
----------
To merge two files into one.
JBData Page 4
----------------------------------------------------------------------
Normally this would be used to combine two data files. A selection box
is shown in order that you can choose the file to merge with the
existing database. It is necessary that the two files to be merged
have identical fields types in the same order unless merging in text
when there is a field check before the record can be saved. After the
filename has been given another dialog appears that provides the
options of merging the two files, over-writing the current file with
the new file and merging or over-writing the file and remapping the
new data so that incoming fields can be directed to different fields
in the destination file. The setup will be transferred at the same
time if over-write is selected.
If it appears that a file has got corrupted and is miss-behaving, it
is worth creating a new file with the same format and try a Merge from
the corrupted file. In many instances this will cure the problem.
It is also possible to merge a text file with a data file. The data
file must consist only of fields with strings for this to work unless
the text has been formatted to suit the field types. In thi