BUTTONCHANGE: Difference between revisions
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(Created page with "{{DISPLAYTITLE:_BUTTONCHANGE}} The _BUTTONCHANGE function returns -1 or 1 when a specified button number on a controller device has been pressed or released. {{PageSyntax}} : {{Parameter|press%}} = _BUTTONCHANGE({{Parameter|button_number%}}) {{PageDescription}} * Values returned are -1 for a press and 1 when a button is released. No press or release event returns zero. * The {{Parameter|button_number%}} must be a number which does not exceed the number of but...") |
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{{PageExamples}} | {{PageExamples}} | ||
''Example:'' Reading multiple controller device buttons, axis and wheels. | ''Example:'' Reading multiple controller device buttons, axis and wheels. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl | {{Cl|FOR}} i = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_DEVICES}} | ||
{{Cl|PRINT}} {{Cl|STR$}}(i) + {{Text|<nowiki>") "</nowiki>|#FFB100}} + {{Cl|_DEVICE$}}(i) + {{Text|<nowiki>" Buttons:"</nowiki>|#FFB100}}; {{Cl|_LASTBUTTON}}(i); {{Text|<nowiki>",Axis:"</nowiki>|#FFB100}}; {{Cl|_LASTAXIS}}(i); {{Text|<nowiki>",Wheel:"</nowiki>|#FFB100}}; {{Cl|_LASTWHEEL}}(i) | |||
{{Cl|NEXT}} | {{Cl|NEXT}} | ||
{{Cl | {{Cl|DO}} | ||
d& = {{Cl|_DEVICEINPUT}} | |||
{{Cl|IF}} d& {{Cl|THEN}} {{Text|<nowiki>' the device number cannot be zero!</nowiki>|#919191}} | |||
{{Cl|PRINT}} {{Text|<nowiki>"Found"</nowiki>|#FFB100}}; d&; | |||
{{Cl|FOR}} b = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_LASTBUTTON}}(d&) | |||
{{Cl|PRINT}} {{Cl|_BUTTONCHANGE}}(b); {{Cl|_BUTTON}}(b); | |||
{{Cl|NEXT}} | |||
{{Cl|FOR}} a = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_LASTAXIS}}(d&) | |||
{{Cl|PRINT}} {{Cl|_AXIS}}(a); | |||
{{Cl|NEXT}} | |||
{{Cl|FOR}} w = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_LASTWHEEL}}(d&) | |||
{{Cl|PRINT}} {{Cl|_WHEEL}}(w); | |||
{{Cl|NEXT}} | |||
{{Cl|PRINT}} | |||
{{Cl|END IF}} | |||
{{Cl|LOOP | {{Cl|DO...LOOP|LOOP UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}({{Text|27|#F580B1}}) {{Text|<nowiki>'escape key exit</nowiki>|#919191}} | ||
{{Cl|END}} | {{Cl|END}} | ||
{{CodeEnd}} | {{CodeEnd}} | ||
: ''Note:'' When there is no device control to read, a [[FOR...NEXT|FOR]] n = 1 TO 0 loop will not run thus avoiding a control function read error. | : ''Note:'' When there is no device control to read, a [[FOR...NEXT|FOR]] n = 1 TO 0 loop will not run thus avoiding a control function read error. | ||
Latest revision as of 11:21, 20 March 2023
The _BUTTONCHANGE function returns -1 or 1 when a specified button number on a controller device has been pressed or released.
Syntax
- press% = _BUTTONCHANGE(button_number%)
Description
- Values returned are -1 for a press and 1 when a button is released. No press or release event returns zero.
- The button_number% must be a number which does not exceed the number of buttons found by the _LASTBUTTON function.
- The number of _DEVICES must be read before using _DEVICE$, _DEVICEINPUT or _LASTBUTTON.
- Note: The center mouse button is button number 2. Center can also be read using _MOUSEBUTTON(3).
Examples
Example: Reading multiple controller device buttons, axis and wheels.
FOR i = 1 TO _DEVICES PRINT STR$(i) + ") " + _DEVICE$(i) + " Buttons:"; _LASTBUTTON(i); ",Axis:"; _LASTAXIS(i); ",Wheel:"; _LASTWHEEL(i) NEXT DO d& = _DEVICEINPUT IF d& THEN ' the device number cannot be zero! PRINT "Found"; d&; FOR b = 1 TO _LASTBUTTON(d&) PRINT _BUTTONCHANGE(b); _BUTTON(b); NEXT FOR a = 1 TO _LASTAXIS(d&) PRINT _AXIS(a); NEXT FOR w = 1 TO _LASTWHEEL(d&) PRINT _WHEEL(w); NEXT PRINT END IF LOOP UNTIL INKEY$ = CHR$(27) 'escape key exit END |
- Note: When there is no device control to read, a FOR n = 1 TO 0 loop will not run thus avoiding a control function read error.
See also
- _LASTWHEEL, _LASTBUTTON, _LASTAXIS
- _AXIS, _WHEEL, _BUTTON
- _DEVICE$, _DEVICES
- _MOUSEBUTTON
- Controller Devices