DEVICEINPUT: Difference between revisions

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; Example 1: Checking device controller interfaces and finding out what devices are being used.
; Example 1: Checking device controller interfaces and finding out what devices are being used.
{{CodeStart}}
{{CodeStart}}
{{Cl|FOR}} i = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_DEVICES}}
{{Cl|FOR}} i% = {{Text|1|#F580B1}} {{Cl|TO}} {{Cl|_DEVICES}}
     {{Cl|PRINT}} {{Cl|STR$}}(i) + {{Text|<nowiki>") "</nowiki>|#FFB100}} + {{Cl|_DEVICE$}}(i)
     {{Cl|PRINT}} {{Cl|STR$}}(i%) + {{Text|<nowiki>") "</nowiki>|#FFB100}} + {{Cl|_DEVICE$}}(i%)
     {{Cl|PRINT}} {{Text|<nowiki>"Button:"</nowiki>|#FFB100}}; {{Cl|_LASTBUTTON}}(i); {{Text|<nowiki>",Axis:"</nowiki>|#FFB100}}; {{Cl|_LASTAXIS}}(i); {{Text|<nowiki>",Wheel:"</nowiki>|#FFB100}}; {{Cl|_LASTWHEEL}}(i)
     {{Cl|PRINT}} {{Text|<nowiki>"Button:"</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}} i%


{{Cl|PRINT}}
{{Cl|PRINT}}
{{Cl|DO}}
{{Cl|DO}}
     x = {{Cl|_DEVICEINPUT}}
     x% = {{Cl|_DEVICEINPUT}}
     {{Cl|IF}} x {{Cl|THEN}} {{Cl|PRINT}} {{Text|<nowiki>"Device ="</nowiki>|#FFB100}}; x;
     {{Cl|IF}} x% {{Cl|THEN}} {{Cl|PRINT}} {{Text|<nowiki>"Device ="</nowiki>|#FFB100}}; x%;
{{Cl|DO...LOOP|LOOP UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}({{Text|27|#F580B1}}) {{Text|<nowiki>'escape key exit</nowiki>|#919191}}
{{Cl|DO...LOOP|LOOP UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}({{Text|27|#F580B1}}) {{Text|<nowiki>'escape key exit</nowiki>|#919191}}


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; Example 2: Why does a mouse have 3 wheels? Relative x and y movements can be read using the first 2 [[_WHEEL]] reads.
; Example 2: Why does a mouse have 3 wheels? Relative x and y movements can be read using the first 2 [[_WHEEL]] reads.
{{CodeStart}}
{{CodeStart}}
ignore = {{Cl|_MOUSEMOVEMENTX}} {{Text|<nowiki>'dummy call to put mouse into relative movement mode</nowiki>|#919191}}
ignore% = {{Cl|_MOUSEMOVEMENTX}} {{Text|<nowiki>'dummy call to put mouse into relative movement mode</nowiki>|#919191}}


{{Cl|PRINT}} {{Text|<nowiki>"Move your mouse and/or your mouse wheel (ESC to exit)"</nowiki>|#FFB100}}
{{Cl|PRINT}} {{Text|<nowiki>"Move your mouse and/or your mouse wheel (ESC to exit)"</nowiki>|#FFB100}}


d = {{Cl|_DEVICES}} {{Text|<nowiki>'  always read number of devices to enable device input</nowiki>|#919191}}
d% = {{Cl|_DEVICES}} {{Text|<nowiki>'  always read number of devices to enable device input</nowiki>|#919191}}
{{Cl|DO}}: {{Cl|_LIMIT}} {{Text|30|#F580B1}} {{Text|<nowiki>'main loop</nowiki>|#919191}}
{{Cl|DO}}: {{Cl|_LIMIT}} {{Text|30|#F580B1}} {{Text|<nowiki>'main loop</nowiki>|#919191}}
     {{Cl|DO...LOOP|DO WHILE}} {{Cl|_DEVICEINPUT}}({{Text|2|#F580B1}}) {{Text|<nowiki>'loop only runs during a device 2 mouse event</nowiki>|#919191}}
     {{Cl|DO...LOOP|DO WHILE}} {{Cl|_DEVICEINPUT}}({{Text|2|#F580B1}}) {{Text|<nowiki>'loop only runs during a device 2 mouse event</nowiki>|#919191}}

Revision as of 20:41, 11 May 2023

The _DEVICEINPUT function returns the device number when a controller device button, wheel or axis event occurs.


Syntax

device% = _DEVICEINPUT
device_active% = _DEVICEINPUT(device_number%)


Parameters

  • Use the device% INTEGER returned to find the number of the controller device being used.
  • A literal specific device_number% parameter can be used to return -1 if active or 0 if inactive, e.g. WHILE _DEVICEINPUT(2).


Description

  • Use _DEVICES to find the number of controller devices available BEFORE using this function.
  • _DEVICE$ can be used to list the device names and control types using valid _DEVICES numbers.
  • When a device button is pressed or a scroll wheel or axis is moved, the device number will be returned.
  • Devices are numbered as 1 for keyboard and 2 for mouse. Other controller devices will be numbered 3 or higher if installed.
  • _LASTBUTTON, _LASTAXIS, or _LASTWHEEL will indicate the number of functions available with the specified device% number.
  • User input events can be monitored reading valid numbered _AXIS, _BUTTON, _BUTTONCHANGE or _WHEEL functions.
  • ON _DEVICEINPUT GOSUB keyboard, mouse, gamecontrol could be used to easily branch to device specific handler routines (see Example 3 below).


Examples

Example 1
Checking device controller interfaces and finding out what devices are being used.
FOR i% = 1 TO _DEVICES
    PRINT STR$(i%) + ") " + _DEVICE$(i%)
    PRINT "Button:"; _LASTBUTTON(i%); ",Axis:"; _LASTAXIS(i%); ",Wheel:"; _LASTWHEEL(i%)
NEXT i%

PRINT
DO
    x% = _DEVICEINPUT
    IF x% THEN PRINT "Device ="; x%;
LOOP UNTIL INKEY$ = CHR$(27) 'escape key exit

END

[KEYBOARD][BUTTON]
Buttons: 512 Axis: 0 Wheels: 0
[MOUSE][BUTTON][AXIS][WHEEL]
Buttons: 3 Axis: 2 Wheels: 3
[CONTROLLER][[NAME][Microsoft Sidewinder Precision Pro (USB)]][BUTTON][AXIS]
Buttons: 9 Axis: 6 Wheels: 0

Device = 2 Device = 2

Note:
Mouse events must be within the program screen area. Keyboard presses
are registered only when program is in focus.
Example 2
Why does a mouse have 3 wheels? Relative x and y movements can be read using the first 2 _WHEEL reads.
ignore% = _MOUSEMOVEMENTX 'dummy call to put mouse into relative movement mode

PRINT "Move your mouse and/or your mouse wheel (ESC to exit)"

d% = _DEVICES '  always read number of devices to enable device input
DO: _LIMIT 30 'main loop
    DO WHILE _DEVICEINPUT(2) 'loop only runs during a device 2 mouse event
        PRINT _WHEEL(1), _WHEEL(2), _WHEEL(3)
    LOOP
LOOP UNTIL INKEY$ = CHR$(27)

Explanation:
Referencing the _MOUSEMOVEMENTX function hides the mouse and sets
the mouse to a relative movement mode which can be read by _WHEEL.
_DEVICEINPUT(2) returns -1 (true) only when the mouse is moved,
scrolled or clicked.
Example 3
Using ON...GOSUB with the _DEVICEINPUT number to add keyboard, mouse and game controller event procedures.
n = _DEVICES 'required when reading devices
PRINT "Number of devices found ="; n
FOR i = 1 TO n
    PRINT i; _DEVICE$(i) ' 1 = keyboard, 2 = mouse, 3 = other controller, etc.
NEXT
PRINT

DO: device = _DEVICEINPUT
    ON device GOSUB keyboard, mouse, controller 'must be inside program loop
LOOP UNTIL INKEY$ = CHR$(27)
END

keyboard:
PRINT device; "Keyboard";
RETURN

mouse:
PRINT device; "Mouse ";
RETURN

controller:
PRINT device; "Game control ";
RETURN
Code by Ted Weissgerber
Note:
ON...GOSUB and ON...GOTO events require numerical values to match
the order of line labels listed in the event used inside loops.


See also


Navigation:
Main Page with Articles and Tutorials
Keyword Reference - Alphabetical
Keyword Reference - By usage
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