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+---- Thread: DAY 038: _MOUSEWHEEL (/showthread.php?tid=1302)
DAY 038: _MOUSEWHEEL - Pete - 12-18-2022
Pretty simple...
SYNTAX scrollAmount% = _MOUSEWHEEL
Usage: Track the scrolling increments of the mouse wheel.
Example:
Code: (Select All)
DIM x AS INTEGER
DO
_LIMIT 30
WHILE _MOUSEINPUT
x = x + _MOUSEWHEEL ' Must be placed inside WHILE/WEND loop.
WEND
lb = _MOUSEBUTTON(1) ' Left mouse button. Better placed outside of WHILE/WEND loop.
IF lb THEN x = 0 ' reset mousewheel counter.
LOCATE 1, 1: PRINT x; " ";
LOOPOne thing to keep in mind is unlike most of the other _MOUSE... keywords, _MOUSEWHEEL has to be placed between WHILE _MOUSEINPUT and WEND statements to be read, not after it like the _MOUSEBUTTON statements.
Note: _MOUSEMOVEX and _MOUSEMOVEY is another example of _MOUSE keywords which need to b placed between, not after, the WHILE/WEND _MOUSEINPUT loop.
Now if you only want to know the direction of the mouse wheel, use SGN() as in...
Code: (Select All)
DIM AS INTEGER x, sgnx
DO
_LIMIT 30
WHILE _MOUSEINPUT
x = x + _MOUSEWHEEL
WEND
lb = _MOUSEBUTTON(1) ' Left mouse button.
IF lb THEN x = 0 ' reset mousewheel counter.
sgnx = SGN(x - oldx): oldx = x
LOCATE 1, 1: PRINT x; " ";: IF sgnx THEN PRINT sgnx; " ";: IF sgnx = -1 THEN PRINT "Up "; ELSE PRINT "Down"; " ";
LOOPPete