XChangePointerControl

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 param-
       eters are unchanged.  Negative values (other than -1) generate a Bad-
       Value 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 acceler-
       ation multiplier and acceleration threshold.

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

SEE ALSO
       Xlib - C Language X Interface



						  XChangePointerControl(3X11)