CAPÍTULO I ANTECEDENTES Y PLANTEAMIENTO DEL PROBLEMA DE INVESTIGACIÓN
1.3. La formación práctica en los programas de formación docente en Chile
1.3.3. Iniciativas implementadas para enfrentar las dificultades detectadas en
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WIndows in < > can be used to FIND vendors
FLEX-KEY OPERATION...
DataFlex uses "Flex-keys" to accomplish various actions on a screen
display. These are in lieu of a menu which would
list
the optionsavailable to a system operator at any given point in an application.
The Flex-key concept works well because the same keys are used for the same function throughout all DataFlex applications on a given system Foe examp1ep the same key is used on all screens to FIND a record in the data basep or to CLEAR displayed infomation from the screen image. As noted above, Flex-keys are specified in the DataFlex
SETSCREEn Program. Specific detailed infomation on the use of the
Flex-keys is in this manual in the chapter on Operator Procedures.
"FINDING" A RECORD IN THE DATA BASE...
Your cursor will wait in the VENDOR NUMBER "window" on the screen.
Enter a number one
(IK
and press the FIND Flex-key on your keyboard (as defined in the Flex-keylist
printed with SETSCREEn). The screen should display information for Data Access Corporation. You have just executed yourfirst
DataFlex CommandlCLEARING INFORMATION FROM THE DISPLAY SCREEN...
To remove this information from the screem press the CLEAR ALL Com- mand Key. The screen should be restored to the same status as when
it
was originally displayed from the menu.
DataFlex 2.0 User's Manual OPERATING TUTORIAL A-37
——
"FINDING" A RECORD BY AN ALTERNATE "KEY"
This screen is configured to allow VENDORs to be found by either the VENDOR NUMBER or the VENDOR NAME. Above. you found a record by VENDOR NUMBER. Now, we can find the same record by VENDOR NAME. While the
cursor is positioned in the VENDOR NUMBER W1ndOWg press <RETURN>» and
it
should move to the VENDOR NAME window. (Thezero which appears in the VENDOR NUMBER wIndow signifies null input, and may be ignored whenever
it
appears.) With the cursor in the VENDOR NAME WindOwy typethe word "DATA" (in capital letters), and press the FIND Flex-key.
Again, the information for Data Access Corporation should be
displayed.
MOVING THE CURSOR AROUND THE SCREEN...
Pressing the <RETURN> command key will move the
cursor sequentially through the entry wIndows of the screen image. To move backwards on
the screen (for example from the VENDOR NAME window back to VENDOR NUMBERL press the BACK WINDOW Flex-key. Each strike of <RETURN> or BACK WINDOW will move the cursor forward or backward one window. One
caution: a BACK WINDOW from the
first
window, or a <RETURN> from thelast window will cause all the windows to c1earg and possibly a
"record" to be saved which you didn't intend to. The safe way to clear all the windows is to strike the CLEAR ALL F1ex-Key» and to
leave the screen altogether, is to strike the ESCape Flex-key. "SCANNING" THE DATA BASE...
DataFlex provides a means for you to scan the records in the data base by any pre-deflned key index. You can enter the index at any point
and move forward or in reverse through the records in the data base
file.
With a clear screen image (as described above) and the cursorin the VENDOR NUMBER window, press the NEXT RECORD Flex-key. Vendor number
"l"
should be displayed. NOWg press NEXT RECORD again... vendor number "2" should be displayed. This same process can be used on any Indexed window on a DataFlex screen image.It will
notfunction on a window that has un-indexed data.
A scan of data base information can begin at any place in an index.
For example
if
you wanted to scan all records with a VENDOR NAME thatstarted with the letter "G", you would move the cursor to the VENDOR NAME window and enter a "G". Then press the NEXT RECORD Flex-key and
the
first
record in the data base which has a VENDOR NAME alpha- betlcally following the letter "G" wIll be displayed, possibly "GARNER SYSTEMS" or "GENERAL ELECTRIC". To scan to the record following the one disp1ayedD press NEXT RECORD agaim and agaim etc. To move inreverse, use the PREVIOUS RECORD Flex-key.
==",~== ——————
A-38 OPERATING TUTORIAL DataF]ex 2.0 User's Manual
ENTERING A NEW RECORD INTO THE DATA BASE...
So far everything that we have done has used data already stored in
the data base.
It's
time for some of your own information! Clear thescreen using the CLEAR ALL Flex-key. Next. press the <RETURN> Key and a zero (O) will be displayed on the screen temporarily; when your new
data is saved a VENDOR NUMBER will automatically be assigned to your new entry.
The cursor should now be in the VENDOR NAME window. Type the name "MICRO MANUFACTURING" and press <RETURN>. Then
fill
in afictitious
address, city. state, ZIP, area code and phone number, terms and
credit
limit.
When the creditlimit
has been entered, your data for MICRO MANUFACTURING will be saved In the data base automatica11y. Theremaining windows on the screen contain calculated data that is up- dated by other parts of the system. No operator entry can be made to
those windows.
The new record is now stored in the data base. To FIND itg place the
cursor in the VENDOR NAME window, type MICRO MANUFACTURING and press
the FIND Flex-key. MICRO MANUFACTURING'S record should be displayed on the screen. You can CLEAR the screen image, or use NEXT or PREVIOUS RECORD Flex-keys to scan other records in the data base. MANGING INFORMATION IN THE DATA BASE...
One of the most important functions of any information system is to
provide for the on-going updates to stored data. This would include such examples as address changes in a mailing
list.
price changes in an inventory system, etc. The process of making these changes in DataFlex is easy... you FIND the record to be changed or updatechenter the necessary changes on the displayed screen imageg and then SAVE the record back to the data base. Let's try
it...
FIND the data base record for MICRO MANUFACTURING. Move the cursor down to the phone number windows and change the existing data to something else (e.g. (414)354-6868 to (939)456-9876). Now press the SAVE Flex-key, and the record will be stored back in the data base
with the changed phone number. FIND MICRO MANUFACTURING again to
verify that your change has been recorded.
The SAVE Command can be executed at any time that a record is dis- played on the screen image. The displayed information wIll be SAVEd
regardless of the position of the cursor in the image. This allows you to save keystrokes by moving the cursor as far Into an image as necessary to change information, and then execute the SAVE without moving to the end of the screen.
HOW TO EXIT THE SCREEN & RETURN TO THE MENU...
To leave any DataF1ex screen image and return control to the Menu,,
—————————————————————————————————
DataFlex 2.0 User's Manual OPERATING TUTORIAL A-39 ___—————_———=———
simply press the ESCAPE Flex-key. The screen image
will
clear and in a moment the DataFlex Menuwill
re-display ready for anotherselection.
CHECKPOINT...
SO FAM we have explored: