Display Control
From
the
keyboard, you
enable
and
disable
the
insert
character
editing
function
using
the
• key.
When
enabled,
the
characters
uIns Char"
are
displayed
in
the
status
line
at
the
bottom of
the
screen.
From
a
program
executing
in
a host computer, you enable
and
disable
the
insert
character
editing
function
using
the
following escape sequence:
ENABLE:
Ec
Q
DISABLE:
Ec
R
Insert Character with Wraparound
This
edit
function works
the
same
as
the
insert
character
function except
that
characters
forced beyond
the
right
margin
are
not
lost. When
the
rightmost
non-blank
character
reaches
the
right
margin
any
characters
that
are
forced over
the
right
margin
move
into
(are
inserted
in)
the
next
lower line
at
the
left
margin.
If
the
next
lower line becomes filled, a
blank
line is
then
inserted
above
it
and
the
character
overflow from
the
line
being
edited spills into
the
new line. As
with
the
insert
character
function
the
cursor moves one column to
the
right
(along
with
the
existing
data)
each
time
a
character
is
inserted
and
it
progresses from
the
right
margin
of one
line
to
the
left
margin
of
the
next
lower line.
This
edit
function
is
meant
to be used
within
that
portion of
the
workspace bounded by
the
left
and
right
margins.
If
you position
the
cursor to
the
left of
the
left
margin,
the
insert
character
with
wraparound
function works
as
described above.
If
you position
the
cursor
beyond
the
right
margin,
however,
the
insert
character
function is
performed
without
wraparound
until
the
cursor reaches
the
right
boundary
and
moves to
the
left
margin
of
the
next
lower
text
line.
At
that
point
the
insert
character
function proceeds
with
wraparound
within
the
defined
margins.
The
movement of
existing
characters
during
an
ttinsert
character
with
wraparound"
editing
operation is
illustrated
in
figure 4-4.
When
Format
mode
is
off,
any
unprotected, transmit-only,
alternate
character
set, and/or
video
enhancement
fields to
the
right
of
the
cursor move to
right
with
the
displayable
characters.
If
part
of
such
a field is forced over
the
right
margin
and
into
the
next
lower line,
the
character
positions left
within
the
field on
the
current
cursor line
maintain
their
charac-
teristics while those
that
are
wrapped lose
their
field characteristics,
but
maintain
their
alternate
character
set
and
video
enhancement
characteristics.
If
all of
such
a field is forced over
the
right
margin
and
into
the
next
lower line,
the
character
positions
within
the
entire
field
maintain
their
characteristics.
If
the
cursor is positioned
within
any
such field,
the
insert
character
with
wraparound
function extends
the
range
of
the
field by one position for each
character
inserted,
unless
the
end of
the
field is wrapped to
the
next
line;
in
which case,
the
field will
stay
the
same
length.
4-14
To Next Page
Loading...
