SET CHOICE MODE(3P) — Kubota Pacfic Computer Inc. (29 February 1991)

NAME

SET CHOICE MODE − set choice device operating mode and echoing state

SYNOPSIS

C Syntax

void
pset_choice_mode ( ws, dev, mode, echo )
Pintws;workstation identifier
Pintdev;choice device number
Pop_modemode;operating mode
Pecho_switchecho;echo switch

Required PHIGS Operating States

(PHOP, WSOP, ∗, ∗)

DESCRIPTION

Purpose

SET CHOICE MODE sets the operating mode and echo switch for a specified choice device on a specified workstation.

C Input Parameters

wsThe workstation identifier of the workstation associated with the device.

devThe device number of the choice device to be set. See the Available Devices section in INITIALIZE CHOICE 3 for a description of the available devices.

modeSpecifies the operating mode for the specified choice device. Pop_mode is an enumeration defined in phigs.h as follows:

typedef enum {
POP_REQ,
POP_SAMPLE,
POP_EVENT
} Pop_mode;

echoThe echo switch value for the specified choice device. Pecho_switch is an enumeration defined in phigs.h as follows:

typedef enum {
PSWITCH_NO_ECHO,
PSWITCH_ECHO
} Pecho_switch;

Execution

SET CHOICE MODE sets the operating mode and echo flag of the specified device. The default operating mode is POP_REQ. The default echo switch is PSWITCH_ECHO.

The operating mode controls how the input from the device is obtained:

• If the operating mode is REQUEST, REQUEST CHOICE may be used to prompt for and receive input from a choice input device. REQUEST CHOICE will not return until the operator enters input to the device.

• If the operating mode is SAMPLE, SAMPLE CHOICE may be used to return the current input value of the device without waiting for operator input.

• If the operating mode is EVENT, the input values generated by the operator are added to the PHIGS input event queue. The functions AWAIT EVENT and GET CHOICE may then be used to retrieve these events from the input queue.

The echo switch may be usd by some devices to control whether or not values selected by the operator are echoed to the device.

ERRORS

003Ignoring function, function requires state (PHOP, WSOP, ∗, ∗)

054Ignoring function, the specified workstation is not open

061Ignoring function, specified workstation is neither of category INPUT nor of category OUTIN

250Ignoring function, the specified device is not available on the specified workstation

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