Xerox Printer User Manual
HOST FORMS DESCRIPTION LANGUAGE
Examples
Long form:
BEGIN SECTION NUSEC; LOGO NEW0 AT 0,0 USING INK 2;
TEXT AT 1,1 USING FONT 3 AND INK 1 ’Acme Weather Balloons’
END SECTION;
TEXT AT 1,1 USING FONT 3 AND INK 1 ’Acme Weather Balloons’
END SECTION;
There is no short form.
SECTION definitions
The BEGIN SECTION command informs the compiler that what
follows includes the END SECTION command and lines up to
form a logical collection of commands that may be invoked as
needed to build a complete form.
follows includes the END SECTION command and lines up to
form a logical collection of commands that may be invoked as
needed to build a complete form.
Most HFDL commands may be found within a SECTION and
these commands are documented in the SECTION command
description. The key point to remember is that coordinates
within the SECTION definition are relative to 0, 0. Also, if the
GRID command is specified, then the GRID is only valid within
the bounds of the defining SECTION. The GRID command is a
local variable and it's scope is that of the defining SECTION.
Other statements within the section will then use the local GRID
command to determine the placement of lines, boxes, text, etc.
Remember that these placement values are still relative to 0, 0.
these commands are documented in the SECTION command
description. The key point to remember is that coordinates
within the SECTION definition are relative to 0, 0. Also, if the
GRID command is specified, then the GRID is only valid within
the bounds of the defining SECTION. The GRID command is a
local variable and it's scope is that of the defining SECTION.
Other statements within the section will then use the local GRID
command to determine the placement of lines, boxes, text, etc.
Remember that these placement values are still relative to 0, 0.
The final placement of the elements is defined by the DO
SECTION command.
SECTION command.
SECTION invocation
A SECTION is invoked by using the DO SECTION command.
This command names the desired SECTION as well as the origin
of the SECTION. The AT parameter takes on the role of the
ORIGIN command for the SECTION and is used to determine
the final placement of lines, boxes, text, etc. The final placement
is computed as follows:
This command names the desired SECTION as well as the origin
of the SECTION. The AT parameter takes on the role of the
ORIGIN command for the SECTION and is used to determine
the final placement of lines, boxes, text, etc. The final placement
is computed as follows:
xFinal=xOrigin + xValue * xGrid
and
yFinal=yOrigin + yValue * yGrid
xValue and yValue are taken from the selected command.
xGrid and yGrid are taken from the active GRID command.
xOrigin and yOrigin are taken from the DO SECTION command
that invokes the section.
xGrid and yGrid are taken from the active GRID command.
xOrigin and yOrigin are taken from the DO SECTION command
that invokes the section.
If a GRID command has not been defined within the SECTION,
the GRID that is in effect for the FORM is used.
the GRID that is in effect for the FORM is used.
DO SECTION command
Use the DO SECTION command to invoke a defined section.
You must first define a section before you can invoke it. You can
repeat sections at absolute or incremental coordinates. You can
also repeat a section in the same location. This command is
useful for sections containing relative coordinates.
You must first define a section before you can invoke it. You can
repeat sections at absolute or incremental coordinates. You can
also repeat a section in the same location. This command is
useful for sections containing relative coordinates.
Figure 3–20 shows the DO SECTION command syntax flow.
3–28
HOST FORMS DESCRIPTION LANGUAGE 3.2 FOR IBM MVS CREATING FORMS