www.LinuxHowtos.org howtos, tips&tricks and tutorials for linux

from small one page howto to huge articles all in one place

Other .linuxhowtos.org sites:toolsntoys.linuxhowtos.org
gentoo.linuxhowtos.org

poll results

Last additions:

using iotop to find disk usage hogs

words:

887

views:

196713

userrating:

average rating: 1.7 (102 votes) (1=very good 6=terrible)

May 25th. 2007:

Words

486

Views

252324

why adblockers are bad

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

141294

userrating:

average rating: 1.4 (42 votes) (1=very good 6=terrible)

April, 26th. 2006:

Words

Views

101157

New subdomain: toolsntoys.linuxhowtos.org

You are here: manpages

XChangePointerControl

Section: XLIB FUNCTIONS (3)
Updated: libX11 1.6.4
Index Return to Main Contents

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 argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.