NAME

       CPCHHL - Called by Conpack routines as high/low labels are being drawn.  The default
       version does nothing.  A user-written version may be supplied to provide control as the
       labels are drawn.

SYNOPSIS

       CALL CPCHHL (IFLG)

DESCRIPTION

       IFLG        (INTEGER, input) is positive if an action is about to be taken, negative if an
                   action has just been completed.  The action in question is defined by the
                   absolute value of IFLG, as follows:

                   •   The value 1 implies the determination of the size of the label for a high
                       (by means of a call to PLCHHQ, in the package Plotchar, with ANGD = 360.).

                   •   The value 2 implies the filling of the box around the label for a high,
                       which is done before the drawing of the label itself.

                   •   The value 3 implies the drawing of the label for a high (by means of a
                       call to PLCHHQ, in the package Plotchar).

                   •   The value 4 implies the drawing of the box around the label for a high,
                       which is done after the drawing of the label itself.

                   •   The value 5 implies the determination of the size of the label for a low
                       (by means of a call to PLCHHQ, in the package Plotchar, with ANGD = 360.).

                   •   The value 6 implies the filling of the box around the label for a low,
                       which is done before the drawing of the label itself.

                   •   The value 7 implies the drawing of the label for a low (by means of a call
                       to PLCHHQ, in the package Plotchar).

                   •   The value 8 implies the drawing of the box around the label for a low,
                       which is done after the drawing of the label itself.

USAGE

       The routine CPCHHL is not to be called by the user. It is called several times by CPLBAM
       and/or CPLBDR while each high or low label is positioned and drawn. The default version of
       CPCHHL does nothing. A user-supplied replacement may change attributes such as color and
       line width (by calling the SPPS routine SETUSV or the appropriate GKS routines). The text
       of the label may be retrieved by means of a "CALL CPGETC ('CTM',CVAL)". The text of the
       label may be changed by means of a "CALL CPSETC ('CTM',CVAL)"; this should only be done
       during a call with IFLG = 1, 3, 5, or 7; if it is done for one of the two values 5 and 7,
       it should also be done for the other.  When CPCHHL is called, the parameter 'ZDV' will
       have been set to the value of the high or low being labelled; its value may be retrieved
       and used by CPCHHL.

ACCESS

       To use CPCHHL, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably
       in that order.

SEE ALSO

       Online: conpack, cpback, cpchcf, cpchcl, cpchil, cpchll, cpcica, cpclam, cpcldm, cpcldr,
       cpcltr, cpcnrc, cpdrpl, cpezct, cpgetc, cpgeti, cpgetr, cplbam, cplbdr, cpmpxy, cpmviw,
       cpmvrw, cppkcl, cppklb, cprect, cprset, cpscae, cpsetc, cpseti, cpsetr, cpsps1, cpsps2,
       ncarg_cbind

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research

       The use of this Software is governed by a License Agreement.