XChangePointerControl, XGetPointerControl - control pointer

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\^);

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.

The 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 for the pointer values to be set, or the parameters are unchanged. Negative values (other than -1) generate a error, as does a zero value for the accel_denominator argument.

can generate a error.

The function returns the pointer's current acceleration multiplier and acceleration threshold.