_MOUSEMOVEMENTX - mkilgore/QB64pe GitHub Wiki

The _MOUSEMOVEMENTX function returns the relative horizontal position of the mouse cursor as positive or negative values.

horizontalMove = _MOUSEMOVEMENTX

• Returns the relative horizontal cursor pixel position compared to the previous cursor position. Negative values are moves to the left.
• Note: A _MOUSESHOW statement will disable _MOUSEMOVEMENTX or _MOUSEMOVEMENTY relative mouse movement reads.
• Can also be used to check for any mouse movements to enable a program or close Screen Saver Programs.
• Sets the mouse to a relative movement mode which can be read by _WHEEL instead of _AXIS as mouse device 2.

Example 1: Since values returned are relative to the last position, the returns can be positive or negative.

 '' ''
SCREEN 12
PX = 320: PY = 240 'center position
DO...LOOP: _LIMIT 200
  DO...LOOP WHILE _MOUSEINPUT
    PX = PX + _MOUSEMOVEMENTX
    PY = PY + _MOUSEMOVEMENTY
  LOOP
  CLS
  CIRCLE (PX, PY), 10, 10
  LOCATE 1, 1: PRINT PX, PY
LOOP UNTIL INKEY$ = CHR$(27) 'escape key exit '' ''

Example 2: MOD is used to keep horizontal movement of the circle and cursor inside of the SCREEN 13 window(320).

 '' ''
SCREEN 13, , 1, 0
DO...LOOP: _LIMIT 200
  DO...LOOP WHILE _MOUSEINPUT
    x = x + _MOUSEMOVEMENTX
    y = y + _MOUSEMOVEMENTY
  LOOP
  x = (x + 320) MOD 320 'keeps object on screen
  y = (y + 200) MOD 200 'remove if off screen moves are desired
  CLS
  CIRCLE (x, y), 20
  PCOPY 1, 0
LOOP UNTIL INKEY$ <> "" 'press any key to exit '' ''

NOTE: When using the function this way, give the user a keypress exit option. Make sure the user has some way to exit that is not dependent on clicking the X button.

• _MOUSEMOVEMENTY
• _MOUSEINPUT, _MOUSEX
• _DEVICES, _DEVICEINPUT
• _WHEEL, _LASTWHEEL
• _AXIS, _LASTAXIS
• _MOUSESHOW, _MOUSEHIDE
• Screen Saver Programs