QBasic 1.1: STRIG Statement

Explanation

STRIG, ON STRIG Statements

STRIG enables, disables, or suspends joystick event trapping. If event trapping is enabled, ON STRIG branches to a subroutine whenever a specified joystick trigger is pressed.

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Syntax

STRIG(n%) ON

STRIG(n%) OFF

STRIG(n%) STOP

ON STRIG(n%) GOSUB line

Description / Parameter(s)

A value that specifies a joystick trigger:

n%	Trigger
0	Lower trigger, joystick A
2	Lower trigger, joystick B
4	Upper trigger, joystick A
6	Upper trigger, joystick B

STRIG(n%) ON

Enables joystick event trapping.

STRIG(n%) OFF

Disables joystick event trapping.

STRIG(n%) STOP

Suspends joystick event trapping. Events are processed once event trapping is enabled by STRIG ON.

line

The label or number of the first line of the event-trapping subroutine.

Example


    'This example requires a joystick.
    ON STRIG(0) GOSUB Handler
    STRIG(0) ON
    PRINT "Press Esc to exit."
    DO UNTIL INKEY$ = CHR$(27): LOOP
    END
 
Handler:
    PRINT "Joystick trigger is depressed."
    RETURN