This document covers the following topics:
| Format/length: | P3 |
| Content modifiable: | Yes (however, a negative value must not be assigned) |
This system variable contains the number of the column in which the cursor is currently positioned.
The cursor position is defined within the currently active window, regardless of its physical placement on the screen, starting with position 1/1 from the upper left corner of a logical page.
If the value of *CURS-COL is negative,
this indicates that the cursor is outside the active window. If
*CURS-COL is negative,
*CURS-LINE will
also contain a negative value. In this case, the absolute values of both system
variables indicate the position of the cursor on the physical screen.
Note:
The message line, function-key lines and infoline/statistics
line are not counted as data lines on the screen.
See also Dialog Design, Column-Sensitive Processing in the Programming Guide.
| Format/length: | I4 |
| Content modifiable: | No |
This system variable returns an identification of the field in which the cursor is currently positioned. The value returned is an internal representation of the field address.
*CURS-FIELD cannot be used by itself,
but only in conjunction with the POS function. You may use them to
check if the cursor is currently positioned in a specific field and have
processing performed depending on that condition. See the
POS function for
details.
If the cursor is not in a field or if no
REINPUT is possible,
*CURS-FIELD contains 0.
In Natural for Ajax applications,
*CURS-FIELD identifies the operand that represents
the value of the control that has the input focus. You may use
*CURS-FIELD in conjunction with the
POS function to check for the control that has the input focus and
perform processing depending on that condition.
Note:*CURS-FIELD cannot distinguish
between two different variables that start at the same storage position
(REDEFINE variables)
since the internal field address returned by
*CURS-FIELD is the same for both.
The value of *CURS-FIELD serves only as
internal identification of the field and cannot be used for arithmetic
operations. If *CURS-FIELD identifies an
occurrence of an X-array (an
array for which at least one bound in at least one dimension is specified as
extensible), the value of *CURS-FIELD may change
after the number of occurrences for a dimension of the array has been changed
using the EXPAND,
RESIZE or
REDUCE statements.
See also Dialog Design, Field-Sensitive Processing in the Programming Guide.
| Format/length: | P3 |
| Content modifiable: | Yes (however, a negative value or 0 must not be assigned) |
This system variable contains the number of the line in which the cursor is currently positioned.
The cursor position is defined within the current active window, regardless of its physical placement on the screen, starting with position 1/1 from the upper left corner of a logical page.
Note:
The message line, function-key lines and infoline/statistics
line are not counted as data lines on the screen.
*CURS-LINE may also contain one of the
following values:
| Value | Cursor Position |
|---|---|
| 0 | On the top or bottom horizontal frame line of a window. |
| -1 | On the Natural message line. |
| -2 | On the Natural infoline/statistics line. |
| -3 | On the upper function-key (number) line. |
| -4 | On the lower function-key (name) line. |
If the value of *CURS-COL is
negative, which indicates that the cursor is outside the active window,
*CURS-LINE will also contain a negative value. In
this case, the absolute values of both system variables indicate the
position of the cursor on the physical screen.
See also Dialog Design, Line-Sensitive Processing in the Programming Guide.
| Format/length: | N6 |
| Content modifiable: | No |
This system variable contains the position of the cursor on the input screen at the time the ENTER key or a function key is pressed.
Note:
Instead of *CURSOR, it is
recommended that the system variables *CURS-LINE and
*CURS-COL
be used. *CURSOR only continues to be available
for compatibility with previous Natural versions.
| Format/length: | P5 |
| Content modifiable: | No |
This system variable contains the line number of the current line within the current page.
This variable is used by Natural to determine the line number for the next line of the report.
The value of *LINE-COUNT is incremented
by 1 for each line to be output. The value is updated during the
execution of a WRITE,
SKIP,
DISPLAY,
PRINT or
INPUT statement and
contains the number of the last line on the page that has been output.
An EJECT or
NEWPAGE statement
causes *LINE-COUNT to be reset to 1
(except in the case of NEWPAGE WITH TITLE, where the value of
*LINE-COUNT depends on the number of lines output
as title).
The maximum line number permitted is 250.
If multiple reports are being produced by the program,
(rep)
notation after *LINE-COUNT is used to specify the
report identification for which the current line number is being requested.
| Format/length: | N7 |
| Content modifiable: | No |
This system variable contains the physical line size of the I/O device from which Natural was invoked (if the TP system is able to provide such).
| Format/length: | N3 |
| Content modifiable: | No |
This system variable contains the line size of the logical page that is output with the primary report.
*LOG-LS is only applicable to the
primary report, not to any additional report.
| Format/length: | N3 |
| Content modifiable: | No |
This system variable contains the page size of the logical page that is output with the primary report.
*LOG-PS is only applicable to the
primary report, not to any additional report.
| Format/length: | P5 |
| Content modifiable: | Yes |
This system variable contains the current value for page number of an output report.
If multiple reports are being produced by the program,
(rep)
notation after *PAGE-NUMBER is used to specify the
report identification for which the current page number is being requested.
This variable is defined by Natural at the time formatting for the
report is started. Therefore, the parameter has no meaning until the first
FORMAT,
WRITE, or
DISPLAY statement for
any given report has been issued. This variable may be modified by a Natural
program.
This variable is used by Natural to determine the page number for
the next page of the report. The value is always incremented by 1 for the next
page initiated by WRITE,
DISPLAY,
SKIP or
NEWPAGE statements.
EJECT does not cause
*PAGE-NUMBER to be incremented.
| Format/length: | N7 |
| Content modifiable: | No |
This system variable contains the physical page size of the I/O device from which Natural was invoked (if the TP subsystem is able to provide such).
| Format/length: | A4 |
| Content modifiable: | No |
This system variable contains the identification of the key which was pressed last.
*PF-KEY can contain one of the
following values:
| Value | Description |
|---|---|
| PA1 to PA3 | Program Attention keys 1 to 3. |
| PF1 to PF48 | Program Function keys 1 to 48. |
| ENTR | ENTER key. |
| CLR | CLEAR key. |
| PEN | Light pen. |
| PGDN | PAGE DOWN key. |
| PGUP | PAGE UP key. |
*PF-KEY only contains the
identification of a key if that key is currently sensitive; otherwise
*PF-KEY will contain ENTR.
Notes:
*PF-KEY
changes to ENTR. This applies to all environments (terminal or
non-terminal).
*PF-KEY with a range of values, remember that
*PF-KEY contains an alphanumeric value.
See also
SET
KEY statement (for effects on the contents of
*PF-KEY).
Processing Based on Function-Keys in the Programming Guide.
| Format/length: | A10 |
| Content modifiable: | No |
This system variable contains the name of the function key that was
pressed last, that is, the name as assigned to the key with the
NAMED clause of the SET
KEY statement.
This allows you to perform processing depending on a specific
function name, not a specific key. For example, if you wish to allow users to
invoke help by pressing either PF1 or PF13, you assign
the name HELP to the keys PF1 and PF13 and
make the invoking of help dependent on
*PF-NAME='HELP': the help will then be invoked no
matter whether the user presses PF1 or PF13 to invoke
it.
See also Dialog Design, Processing Based on Function-Key Names in the Programming Guide.
| Format/length: | N3 |
| Content modifiable: | No |
This system variable contains the line size of the logical window
(without frame). See also the DEFINE
WINDOW statement.
| Format/length: | N6 |
| Content modifiable: | No |
This system variable contains the position which corresponds to the
upper left corner of the window. See also the
DEFINE WINDOW
statement.
The position is counted in characters across multiple lines,
beginning with 0 (upper left corner).
| Format/length: | N3 |
| Content modifiable: | No |
This system variable contains the page size of the logical window
(without frame). See also the DEFINE
WINDOW statement.