_MOUSEX - mkilgore/QB64pe GitHub Wiki

The _MOUSEX function returns the current horizontal (column) mouse cursor position when read after _MOUSEINPUT.

pixelColumn% = _MOUSEX

• SCREEN 0 returns the INTEGER horizontal text column position (from build 20170817/62 onward); older versions return a SINGLE horizontal text column position. Use INTEGER variables to avoid floating decimal returns.
• Graphic screen modes 1, 2 and 7 to 13 and _NEWIMAGE 32 bit return the INTEGER pixel columns.
• To calculate text columns in graphic modes, divide the return by 8 or the _FONTWIDTH of _FONT characters.
• _MOUSEINPUT must be used to detect any changes in the mouse position and is required for any coordinate returns.

• In SCREEN 0, QBasic's ABSOLUTE returned graphic coordinates. QB64 mouse functions return the text coordinates.

Example: A simple mouse drawing board using _MOUSEX and _MOUSEY coordinate values.

 '' ''
SCREEN (statement) 12
LINE (99, 9)-(601, 401), 7, BF
LINE (101, 11)-(599, 399), 8, BF
tm$ = " Column = ###  Row = ###  Button1 = ##  Button2 = ##  Button3 = ##"
LOCATE 29, 20: PRINT "LeftButton = draw - RightButton = Erase";
DO: K$ = INKEY$
  DO WHILE _MOUSEINPUT
    X = _MOUSEX: Y = _MOUSEY
    IF X > 100 AND (boolean) X < 600 AND (boolean) PX > 100 AND (boolean) PX < 600 THEN
      IF Y > 10 AND (boolean) Y < 400 AND (boolean) PY > 10 AND (boolean) PY < 400 THEN
        IF _MOUSEBUTTON(1) THEN LINE (PX, PY)-(X, Y), 15
        IF _MOUSEBUTTON(2) THEN LINE (101, 11)-(599, 399), 8, BF
      END IF
    END IF
    PX = X: PY = Y
    LOCATE 28, 10: PRINT USING tm$; X; Y; _MOUSEBUTTON(1); _MOUSEBUTTON(2); _MOUSEBUTTON(3)
  LOOP
LOOP UNTIL K$ = CHR$(27)
SYSTEM '' ''

• _MOUSEY
• _MOUSEBUTTON, _MOUSEWHEEL
• _MOUSEINPUT, _MOUSEMOVE
• _MOUSESHOW, _MOUSEHIDE
• _MOUSEMOVEMENTX, _MOUSEMOVEMENTY (relative pointer moves)
• Controller Devices