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110 lines
4.5 KiB
Plaintext
110 lines
4.5 KiB
Plaintext
{{DISPLAYTITLE:_DEVICEINPUT}}
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The '''_DEVICEINPUT''' function returns the device number when a controller device button, wheel or axis event occurs.
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{{PageSyntax}}
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: {{Parameter|device%}} = [[_DEVICEINPUT]]
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: {{Parameter|device_active%}} = [[_DEVICEINPUT]]({{Parameter|device_number%}})
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{{Parameters}}
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* Use the _DEVICEINPUT {{Parameter|device%}} [[INTEGER]] returned to find the number of the controller device being used.
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* A literal specific {{Parameter|device_number%}} parameter can be used to return -1 if active or 0 if inactive. {{text|EX: '''WHILE _DEVICEINPUT(2)'''|green}}
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{{PageDescription}}
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* Use [[_DEVICES]] to find the number of controller devices available BEFORE using this function.
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* [[_DEVICE$]] can be used to list the device names and control types using valid [[_DEVICES]] numbers.
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* When a device button is pressed or a scroll wheel or axis is moved, the device number will be returned.
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* Devices are numbered as 1 for keyboard and 2 for mouse. Other controller devices will be numbered 3 or higher if installed.
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* [[_LASTBUTTON]], [[_LASTAXIS]], or [[_LASTWHEEL]] will indicate the number of functions available with the specified ''device'' number.
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* User input events can be monitored reading valid numbered [[_AXIS]], [[_BUTTON]], [[_BUTTONCHANGE]] or [[_WHEEL]] functions.
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* ''Note:'' [[ON...GOSUB|ON _DEVICEINPUT GOSUB]] keyboard, mouse, gamecontrol can be used to control the devices 1,2 and 3, etc.
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{{PageExamples}}
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''Example 1:'' Checking device controller interfaces and finding out what devices are being used.
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{{CodeStart}} '' ''
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{{Cl|FOR...NEXT|FOR}} i = 1 {{Cl|TO}} {{Cl|_DEVICES}}
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{{Cl|PRINT}} {{Cl|STR$}}(i) + ") " + {{Cl|_DEVICE$}}(i)
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{{Cl|PRINT}} "Button:"; {{Cl|_LASTBUTTON}}(i); ",Axis:"; {{Cl|_LASTAXIS}}(i); ",Wheel:"; {{Cl|_LASTWHEEL}}(i)
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{{Cl|NEXT}}
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{{Cl|PRINT}}
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DO
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x = {{Cl|_DEVICEINPUT}}
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{{Cl|IF...THEN|IF}} x {{Cl|THEN}} {{Cl|PRINT}} "Device ="; x;
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}(27) 'escape key exit
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{{Cl|END}} '' ''
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{{CodeEnd}}
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{{OutputStart}}[KEYBOARD][BUTTON]
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Buttons: 512 Axis: 0 Wheels: 0
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[MOUSE][BUTTON][AXIS][WHEEL]
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Buttons: 3 Axis: 2 Wheels: 3
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[CONTROLLER][[NAME][Microsoft Sidewinder Precision Pro (USB)]][BUTTON][AXIS]
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Buttons: 9 Axis: 6 Wheels: 0
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Device = 2 Device = 2
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{{OutputEnd}}
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: ''Note:'' Mouse events must be within the program screen area. Keyboard presses are registered only when program is in focus.
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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.
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{{CodeStart}} '' ''
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ignore = {{Cl|_MOUSEMOVEMENTX}} 'dummy call to put mouse into relative movement mode
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{{Cl|PRINT}} "Move your mouse and/or your mouse wheel (ESC to exit)"
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d = {{Cl|_DEVICES}} ' always read number of devices to enable device input
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DO: {{Cl|_LIMIT}} 30 'main loop
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{{Cl|DO...LOOP|DO}} {{Cl|WHILE}} {{Cl|_DEVICEINPUT}}(2) 'loop only runs during a device 2 mouse event
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{{Cl|PRINT}} {{Cl|_WHEEL}}(1), {{Cl|_WHEEL}}(2), {{Cl|_WHEEL}}(3)
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{{Cl|LOOP}}
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}(27) '' ''
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{{CodeEnd}}
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: ''Explanation:'' Referencing the [[_MOUSEMOVEMENTX]] function hides the mouse and sets the mouse to a relative movement mode which can be read by [[_WHEEL]]. [[_DEVICEINPUT]](2) returns -1 (true) only when the mouse is moved, scrolled or clicked.
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''Example 3:'' Using [[ON...GOSUB]] with the [[_DEVICEINPUT]] number to add keyboard, mouse and game controller event procedures.
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{{CodeStart}} '' ''
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n = {{Cl|_DEVICES}} 'required when reading devices
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{{Cl|PRINT}} "Number of devices found ="; n
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{{Cl|FOR...NEXT|FOR}} i = 1 TO n
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PRINT i; _DEVICE$(i) ' 1 = keyboard, 2 = mouse, 3 = other controller, etc.
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{{Cl|NEXT}}
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{{Cl|PRINT}}
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{{Cl|DO...LOOP|DO}}: device = {{Cl|_DEVICEINPUT}}
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{{Cl|ON...GOSUB|ON device GOSUB}} keyboard, mouse, controller 'must be inside program loop
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{{Cl|LOOP}} {{Cl|UNTIL}} {{Cl|INKEY$}} = {{Cl|CHR$}}(27)
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{{Cl|END}}
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keyboard:
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{{Cl|PRINT}} device; "Keyboard";
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{{Cl|RETURN}}
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mouse:
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{{Cl|PRINT}} device; "Mouse ";
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{{Cl|RETURN}}
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controller:
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{{Cl|PRINT}} device; "Game control ";
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{{Cl|RETURN}} '' ''
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{{CodeEnd}}
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{{small|Code by Ted Weissgerber}}
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: ''Note:'' [[ON...GOSUB]] and [[ON...GOTO]] events require numerical values to match the order of line labels listed in the event used inside loops.
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{{PageSeeAlso}}
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* [[_DEVICES]], [[_DEVICE$]]
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* [[_LASTBUTTON]], [[_LASTAXIS]], [[_LASTWHEEL]]
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* [[_BUTTON]], [[_AXIS]], [[_WHEEL]]
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* [[STRIG]], [[STICK]]
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* [[ON...GOSUB]] {{text|(numerical events)}}
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* [[Controller Devices]]
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{{PageNavigation}}
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