Name

preq_val − Prompts for input using the valuator-class logical input device specified. 

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

Syntax

void preq_val (
  Pint          wsid,       /∗ (I) Workstation identifier ∗/
  Pint          dev_num,    /∗ (I) Valuator device number ∗/
  Pin_status   ∗status,     /∗ (O) Input status ∗/
  Pfloat       ∗value       /∗ (O) Valuator value ∗/
)

Data Structures

typedef enum {
    PIN_STATUS_NONE,    /∗ user performed a break action ∗/
    PIN_STATUS_OK,      /∗ user entered a value ∗/
    PIN_STATUS_NO_IN    /∗ not used by this function ∗/
} Pin_status;

Description

preq_val prompts for input using the valuator-class logical input device specified by the device number and the workstation identifier.  If the input status is PIN_STATUS_OK, this function returns the value (a real number). 

See Also

pget_val
pinit_val
psample_val
pset_val_mode