1XChangePointerControl(3)        XLIB FUNCTIONS        XChangePointerControl(3)
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NAME

6       XChangePointerControl, XGetPointerControl - control pointer
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SYNTAX

9       int XChangePointerControl(Display *display, Bool do_accel, Bool
10              do_threshold, int accel_numerator, int accel_denominator, int
11              threshold);
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13       int XGetPointerControl(Display *display, int *accel_numerator_return,
14              int *accel_denominator_return, int *threshold_return);
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ARGUMENTS

17       accel_denominator
18                 Specifies the denominator for the acceleration multiplier.
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20       accel_denominator_return
21                 Returns the denominator for the acceleration multiplier.
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23       accel_numerator
24                 Specifies the numerator for the acceleration multiplier.
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26       accel_numerator_return
27                 Returns the numerator for the acceleration multiplier.
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29       display   Specifies the connection to the X server.
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31       do_accel  Specifies a Boolean value that controls whether the values
32                 for the accel_numerator or accel_denominator are used.
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34       do_threshold
35                 Specifies a Boolean value that controls whether the value for
36                 the threshold is used.
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38       threshold Specifies the acceleration threshold.
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40       threshold_return
41                 Returns the acceleration threshold.
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DESCRIPTION

44       The XChangePointerControl function defines how the pointing device
45       moves.  The acceleration, expressed as a fraction, is a multiplier for
46       movement.  For example, specifying 3/1 means the pointer moves three
47       times as fast as normal.  The fraction may be rounded arbitrarily by
48       the X server.  Acceleration only takes effect if the pointer moves more
49       than threshold pixels at once and only applies to the amount beyond the
50       value in the threshold argument.  Setting a value to -1 restores the
51       default.  The values of the do_accel and do_threshold arguments must be
52       True for the pointer values to be set, or the parameters are unchanged.
53       Negative values (other than -1) generate a BadValue error, as does a
54       zero value for the accel_denominator argument.
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56       XChangePointerControl can generate a BadValue error.
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58       The XGetPointerControl function returns the pointer's current accelera‐
59       tion multiplier and acceleration threshold.
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DIAGNOSTICS

62       BadValue  Some numeric value falls outside the range of values accepted
63                 by the request.  Unless a specific range is specified for an
64                 argument, the full range defined by the argument's type is
65                 accepted.  Any argument defined as a set of alternatives can
66                 generate this error.
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SEE ALSO

69       Xlib - C Language X Interface
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73X Version 11                     libX11 1.3.4         XChangePointerControl(3)
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