215 lines
6.1 KiB
Groff
215 lines
6.1 KiB
Groff
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\"
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.ie "\\*(.T"480" .ft L
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..
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.ny0
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.TH XChangePointerControl __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XChangePointerControl, XGetPointerControl \- control pointer
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.SH SYNTAX
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.HP
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int XChangePointerControl\^(\^Display *\fIdisplay\fP\^, Bool \fIdo_accel\fP\^,
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Bool \fIdo_threshold\fP\^, int \fIaccel_numerator\fP\^, int
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\fIaccel_denominator\fP\^, int \fIthreshold\fP\^);
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.HP
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int XGetPointerControl\^(\^Display *\fIdisplay\fP\^, int
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*\fIaccel_numerator_return\fP\^, int *\fIaccel_denominator_return\fP\^, int
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*\fIthreshold_return\fP\^);
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.SH ARGUMENTS
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.IP \fIaccel_denominator\fP 1i
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Specifies the denominator for the acceleration multiplier.
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.IP \fIaccel_denominator_return\fP 1i
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Returns the denominator for the acceleration multiplier.
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.IP \fIaccel_numerator\fP 1i
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Specifies the numerator for the acceleration multiplier.
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.IP \fIaccel_numerator_return\fP 1i
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Returns the numerator for the acceleration multiplier.
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIdo_accel\fP 1i
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Specifies a Boolean value that controls whether the values for
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the accel_numerator or accel_denominator are used.
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.IP \fIdo_threshold\fP 1i
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Specifies a Boolean value that controls whether the value for the
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threshold is used.
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.IP \fIthreshold\fP 1i
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Specifies the acceleration threshold.
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.IP \fIthreshold_return\fP 1i
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Returns the acceleration threshold.
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.SH DESCRIPTION
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The
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.ZN XChangePointerControl
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function defines how the pointing device moves.
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The acceleration, expressed as a fraction, is a
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multiplier for movement.
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For example,
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specifying 3/1 means the pointer moves three times as fast as normal.
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The fraction may be rounded arbitrarily by the X server.
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Acceleration
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only takes effect if the pointer moves more than threshold pixels at
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once and only applies to the amount beyond the value in the threshold argument.
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Setting a value to \-1 restores the default.
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The values of the do_accel and do_threshold arguments must be
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.ZN True
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for the pointer values to be set,
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or the parameters are unchanged.
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Negative values (other than \-1) generate a
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.ZN BadValue
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error, as does a zero value
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for the accel_denominator argument.
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.LP
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.ZN XChangePointerControl
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can generate a
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.ZN BadValue
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error.
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.LP
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The
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.ZN XGetPointerControl
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function returns the pointer's current acceleration multiplier
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and acceleration threshold.
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.SH DIAGNOSTICS
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.TP 1i
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.ZN BadValue
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Some numeric value falls outside the range of values accepted by the request.
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Unless a specific range is specified for an argument, the full range defined
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by the argument's type is accepted. Any argument defined as a set of
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alternatives can generate this error.
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.SH "SEE ALSO"
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\fI\*(xL\fP
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