XChangePointerControl(3) XLIB FUNCTIONS XChangePointerControl(3)
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 InterfaceX Version 11 libX11 1.8.10 XChangePointerControl(3)
