ncl_cpchhl (3) - Linux Manuals
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.COPYRIGHT
Copyright (C) 1987-2009University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.