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 XChangePointerControl 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
 NAME
XChangePointerControl, XGetPointerControl - control pointer 
 SYNTAX
 $Header: XChPointCon.f,v 1.1 88/02/26 09:58:33 mento Exp $
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\^;

 $Header: XGetPntrCnt.f,v 1.1 88/02/26 10:00:55 mento Exp $
XGetPointerControl\^(\^display, accel_numerator_return\^, accel_denominator_return\^, 

 threshold_return\^)

 Display *display\^;

 int *accel_numerator_return\^, *accel_denominator_return\^;

 int *threshold_return\^;
 ARGUMENTS
 $Header: acceldenom.a,v 1.1 88/02/26 10:04:37 mento Exp $
 accel_denominator 1i
Specifies the denominator for the acceleration multiplier.
 $Header: acceldenomrt.a,v 1.1 88/02/26 10:04:37 mento Exp $
 accel_denominator_return 1i
Returns the denominator for the acceleration multiplier.
 $Header: accelnum.a,v 1.1 88/02/26 10:04:44 mento Exp $
 accel_numerator 1i
Specifies the numerator for the acceleration multiplier.
 $Header: accelnumret.a,v 1.1 88/02/26 10:04:45 mento Exp $
 accel_numerator_return 1i
Returns the numerator for the acceleration multiplier.
 $Header: display.a,v 1.1 88/02/26 10:26:29 mento Exp $
 display 1i
Specifies the connection to the X server.
 $Header: doaccel.a,v 1.4 88/05/14 09:22:57 mento Exp $
 do_accel 1i
Specifies a Boolean value that controls whether the values for 
the accel_numerator or accel_denominator are used.
 $Header: dothreshold.a,v 1.5 88/05/14 09:24:07 mento Exp $
 do_threshold 1i
Specifies a Boolean value that controls whether the value for the 
threshold is used.
 $Header: threshold.a,v 1.1 88/02/26 10:31:38 mento Exp $
 threshold 1i
Specifies the acceleration threshold.
 $Header: thresholdret.a,v 1.1 88/02/26 10:31:39 mento Exp $
 threshold_return 1i
Returns the acceleration threshold.
 DESCRIPTION
 $Header: XChPointCon.d,v 1.2 88/06/11 07:49:03 mento Exp $
The
.ZN 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 
.ZN True 
for the pointer values to be set,
or the parameters are unchanged.
Negative values (other than -1) generate a
.ZN BadValue
error, as does a zero value
for the accel_denominator argument.

.ZN XChangePointerControl
can generate a
.ZN BadValue 
error.

 $Header: XGetPntrCnt.d,v 1.1 88/02/26 10:48:32 mento Exp $
The
.ZN XGetPointerControl
function returns the pointer's current acceleration multiplier
and acceleration threshold.
 DIAGNOSTICS
 $Header: badvalue.e,v 1.1 87/09/04 08:23:19 mento Exp $
 1i
.ZN BadValue
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, 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"
\*(xL