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The graPHIGS Programming Interface: ISO PHIGS Subroutine Reference

INQUIRE VALUATOR DEVICE STATE (PHOP,WSOP,*,*)

Purpose

Use Inquire Valuator Device State to inquire the current state of the specified valuator device on the specified workstation.

The graPHIGS API returns the values of the specified device. The format and content of these values returned by the graPHIGS API depends on the prompt/echo type defined in the subroutine that initializes the input device.

If the information is available, then the graPHIGS API sets the error indicator to zero and returns the values in the output parameters. If the information is unavailable, then the values returned in the output parameters are unpredictable and the graPHIGS API sets the error indicator to one of the following errors:

3
Function Requires State (PHOP,WSOP,*,*)
54
Specified Workstation Is Not Open
61
Specified Workstation Is Not Of Category Input Or Outin
250
Specified Device Not Available On Workstation

Language Bindings

C

pinq_val_st (ws_id, val_num, store, err_ind, op_mode, echo_switch, init_value, prompt_echo, echo_area, val_data)

Input Parameters

Pint ws_id
Workstation identifier.

Pint val_num
Valuator device number (>=1).

Pstore store
Handle to the store object. The graPHIGS API uses an object of type Store to facilitate the use of subroutines which return complex data. See Create Store ( CREATE STORE (PHOP,*,*,*)) subroutine for details on how the graPHIGS API uses this parameter on inquiries.

Output Parameters

Pint *err_ind
Error indicator.

Pop_mode *op_mode
Operating mode (0=POP_REQ, 1=POP_SAMPLE, 2=POP_EVENT).

Pecho_switch *echo_switch
Echo switch (0=PSWITCH_NO_ECHO, 1=PSWITCH_ECHO).

Pfloat *init_value
Initial value.

Pint *prompt_echo
Prompt and echo type.

Plimit *echo_area
Echo area in DC.

Pval_data **val_data
Data record. The memory referenced by *val_data is managed by the parameter store.

FORTRAN

PQVLS (wkid, vldnr, mldr, errind, mode, esw, ival, pet, earea, ldr, datrec)

Input Parameters

integer wkid
Workstation identifier.

integer vldnr
Valuator device number (>=1).

integer mldr
Dimension of the data record array (>=0).

Output Parameters

integer errind
Error indicator.

integer mode
Operating mode (0=PREQU, 1=PSAMPL, 2=PEVENT).

integer esw
Echo switch (0=PNECHO, 1=PECHO).

real ival
Initial value.

integer pet
Prompt and echo type.

real earea(4)
Echo area in DC (XMIN, XMAX, YMIN, YMAX).

integer ldr
Number of array elements in the data record.

character*80 datrec(mldr)
Data record.

Errors

None

Related Subroutines

  • Initialize Valuator

  • Initialize Valuator 3

  • Inquire Default Valuator Device Data

  • Inquire Default Valuator Device Data 3

  • Inquire Valuator Device State 3

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