Name

PQPLF − Returns line width and type information. 

Operating States: PHOP, ∗, ∗, ∗
PHIGS standard function
 

Syntax

PQPLF (WTYPE, N, ERRIND, NLT, LT, NLW, NOMLW, RLWMIN, RLWMAX, NPPLI)

Argument          Data Type      Access    Description
---------------------------------------------------------------------------
WTYPE             Integer        Read      Workstation type
N                 Integer        Read      Sequence number of the list
                                           element requested
ERRIND            Integer        Write     Error indicator
NLT               Integer        Write     Number of available line types
LT                Integer        Write     Nth element of the list of
                                           available line types
NLW               Integer        Write     Number of available line widths
NOMLW             Real           Write     Nominal line width, in device
                                           coordinates
RLWMIN, RLWMAX    Real           Write     Range of line widths, in device
                                           coordinates
NPPLI             Integer        Write     Number of predefined polyline
                                           indexes
---------------------------------------------------------------------------

Constants

Defined Argument     Constant     Description
---------------------------------------------------------------------------
LT                   PLSOLI         Solid edge
                     PLDASH         Dashed edge
                     PLDOT          Dotted edge
                     PLDASD         Dashed-dotted edge
                     PLDS2D         Dash-2-dots edge
                     PLDS3D         Dash-3-dots edge
                     PLLDS          Long dashed edge
                     PLLSDS         Long-short dashed edge
                     PLSPDS         Spaced dashed edge
                     PLSPD          Spaced dotted edge
                     PL2D           Double-dotted edge
                     PL3D           Triple-dotted edge
---------------------------------------------------------------------------

Description

PQPLF queries the workstation description table and returns values for the following:

•Number of available line types

•Nth element of the list of available line types

•Number of available line widths

•Nominal line width, in device coordinates

•Minimum and maximum line widths, in device coordinates

•Number of predefined polyline indexes

The value of the number of available line types has the following interpretations:

Value       Result
Positive    The list of available line types contains all registered
            and implementation-dependent line types.
Negative    Two conditions apply:
            - Digital PHIGS derives the implementation-dependent line
              types directly from the value and the line type aspect.
            - The list of available line types contains the registered
              line types supported, the number of which is the absolute
              value of the number of available line types.

If Digital PHIGS returns 0 as the number of available line widths, the workstation supports a continuous range of line widths. 

See Also

PQPPLR
PQPPLP
PSPLR
PSPLP