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XChangePointerControl

XChangePointerControl

Section: XLIB FUNCTIONS (3) Updated: libX11 1.4.2
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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.
 

SEE ALSO

Xlib - C Language X Interface


 

Index

NAME
SYNTAX
ARGUMENTS
DESCRIPTION
DIAGNOSTICS
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 21:58:30 GMT, April 16, 2011