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

NAME

       XChangePointerControl, XGetPointerControl - control pointer

SYNTAX

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

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

X Version 11							    Release 6.6 				       XChangePointerControl(3X11)