xfree86 man page for xgetpointercontrol

XChangePointerControl(3X11)					  XLIB FUNCTIONS				       XChangePointerControl(3X11)

NAME
       XChangePointerControl, XGetPointerControl - control pointer

SYNTAX
       int XChangePointerControl(Display *display, Bool do_accel, Bool do_threshold, int accel_numerator, int accel_denominator, int threshold);

       int XGetPointerControl(Display *display, int *accel_numerator_return, int *accel_denominator_return, int *threshold_return);

ARGUMENTS
       accel_denominator
		 Specifies the denominator for the acceleration multiplier.

       accel_denominator_return
		 Returns the denominator for the acceleration multiplier.

       accel_numerator
		 Specifies the numerator for the acceleration multiplier.

       accel_numerator_return
		 Returns the numerator for the acceleration multiplier.

       display	 Specifies the connection to the X server.

       do_accel  Specifies a Boolean value that controls whether the values for the accel_numerator or accel_denominator are used.

       do_threshold
		 Specifies a Boolean value that controls whether the value for the threshold is used.

       threshold Specifies the acceleration threshold.

       threshold_return
		 Returns the acceleration threshold.

DESCRIPTION
       The XChangePointerControl function defines how the pointing device moves.  The acceleration, expressed as a fraction, is a multiplier for
       movement.  For example, specifying 3/1 means the pointer moves three times as fast as normal.  The fraction may be rounded arbitrarily by
       the X server.  Acceleration only takes effect if the pointer moves more than threshold pixels at once and only applies to the amount beyond
       the value in the threshold argument.  Setting a value to -1 restores the default.  The values of the do_accel and do_threshold arguments
       must be True for the pointer values to be set, or the parameters are unchanged.	Negative values (other than -1) generate a BadValue error,
       as does a zero value for the accel_denominator argument.

       XChangePointerControl can generate a BadValue error.

       The XGetPointerControl function returns the pointer's current acceleration multiplier and acceleration threshold.

DIAGNOSTICS
       BadValue  Some numeric value falls outside the range of values accepted by the request.	Unless a specific range is specified for an argu-
		 ment, the full range defined by the argument's type is accepted.  Any argument defined as a set of alternatives can generate this
		 error.

SEE ALSO
       Xlib - C Language X Interface

XFree86 							   Version 4.7.0				       XChangePointerControl(3X11)