ON STRIG(n): Difference between revisions
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(Created page with "The ON STRIG(n) statement is an event procedure that directs program flow upon the press of a specified joystick button. {{PageSyntax}} : '''ON STRIG'''({{Parameter|buttonFunction}}) GOSUB {{{Parameter|lineNumber}}|{{Parameter|lineLabel}}} : '''ON STRIG'''({{Parameter|buttonFunction}}[, {{Parameter|joystickNumber}}]) {GOSUB {{{Parameter|lineNumber}}|{{Parameter|lineLabel}}} | SUBprocedure} * In '''QB64''' the value can be any button function number w...") |
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{{PageExamples}} | {{PageExamples}} | ||
''Example 1:'' Reading a STRIG event to do something in a [[GOSUB]] procedure. | ''Example 1:'' Reading a STRIG event to do something in a [[GOSUB]] procedure. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|ON STRIG(n)|ON STRIG}}(0) {{Cl|GOSUB}} 10 | {{Cl|ON STRIG(n)|ON STRIG}}(0) {{Cl|GOSUB}} 10 | ||
{{Cl|STRIG(n)|STRIG}}(0)ON | {{Cl|STRIG(n)|STRIG}}(0)ON | ||
| Line 35: | Line 35: | ||
{{Cl|_DELAY}} 0.02 | {{Cl|_DELAY}} 0.02 | ||
{{Cl|NEXT}} | {{Cl|NEXT}} | ||
{{Cl|RETURN}} | {{Cl|RETURN}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
| Line 56: | Line 56: | ||
{{Cl|SUB}} JoyButton (js {{Cl|AS}} {{Cl|LONG}}) | {{Cl|SUB}} JoyButton (js {{Cl|AS}} {{Cl|LONG}}) | ||
{{Cl|PRINT}} "Joystick #"; js \ 256 + 1; "button #"; (js {{Cl|AND (boolean)|AND}} 255) + 1; "pressed!" | {{Cl|PRINT}} "Joystick #"; js \ 256 + 1; "button #"; (js {{Cl|AND (boolean)|AND}} 255) + 1; "pressed!" | ||
{{Cl|END SUB}} | {{Cl|END SUB}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
:''Explanation:'' Up to 256 controllers can be used in QB64 with many buttons to read. | :''Explanation:'' Up to 256 controllers can be used in QB64 with many buttons to read. | ||
Revision as of 02:13, 23 January 2023
The ON STRIG(n) statement is an event procedure that directs program flow upon the press of a specified joystick button.
Syntax
- ON STRIG(buttonFunction) GOSUB {lineNumber|lineLabel}
- ON STRIG(buttonFunction[, joystickNumber]) {GOSUB {lineNumber|lineLabel} | SUBprocedure}
- In QB64 the value can be any button function number with any number of joysticks. See STRIG and STICK for parameters.
- There are two buttonFunction for each button. The even numbered function is always the event of any press since last read.
- The statement sends the procedure to a line number, line label or SUB procedure when a button event occurs.
QBasic/QuickBASIC
- In QBasic, value of n could only be a number from 0 to 3 only as it could only monitor 2 joystick buttons and 2 joysticks.
Examples
Example 1: Reading a STRIG event to do something in a GOSUB procedure.
ON STRIG(0) GOSUB 10 STRIG(0)ON DO PRINT "."; _LIMIT 30 LOOP UNTIL INKEY$ <> "" END 10 a$ = "[STRIG 0 EVENT]" FOR x = 1 TO LEN(a$) PRINT MID$(a$, x, 1); _DELAY 0.02 NEXT RETURN |
Example 2: Displays any number of game pad or joystick device button presses.
FOR j = 1 TO 256 FOR b = 1 TO 256 ON STRIG((b - 1) * 4, j) JoyButton (j - 1) * 256 + b - 1 NEXT NEXT STRIG ON DO PRINT "."; _LIMIT 30 LOOP UNTIL INKEY$ <> "" END SUB JoyButton (js AS LONG) PRINT "Joystick #"; js \ 256 + 1; "button #"; (js AND 255) + 1; "pressed!" END SUB |
- Explanation: Up to 256 controllers can be used in QB64 with many buttons to read.
See also
External links