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authormarha <marha@users.sourceforge.net>2010-01-14 10:44:09 +0000
committermarha <marha@users.sourceforge.net>2010-01-14 10:44:09 +0000
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Git update 14/1/2010
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+++ b/xorg-server/hw/xfree86/doc/man/xorg.conf.man.pre
@@ -914,7 +914,72 @@ X Input extension. This option controls the startup behavior only, a device
may be reattached or set floating at runtime.
.TP 7
.BI "Option \*qSendDragEvents\*q \*q" boolean \*q
-???
+Send core events while dragging. Enabled by default.
+.PP
+For pointing devices, the following options control how the pointer
+is accelerated or decelerated with respect to physical device motion. Most of
+these can be adjusted at runtime, see the xinput(1) man page for details. Only
+the most important acceleration options are discussed here.
+.TP 7
+.BI "Option \*qAccelerationProfile\*q \*q" integer \*q
+Select the profile. In layman's terms, the profile constitutes the "feeling" of
+the acceleration. More formally, it defines how the transfer function (actual
+acceleration as a function of current device velocity and acceleration controls)
+is constructed. This is mainly a matter of personal preference.
+.PP
+.RS 6
+.nf
+.B " 0 classic (mostly compatible)"
+.B "-1 none (only constant deceleration is applied)"
+.B " 1 device-dependent"
+.B " 2 polynomial (polynomial function)"
+.B " 3 smooth linear (soft knee, then linear)"
+.B " 4 simple (normal when slow, otherwise accelerated)"
+.B " 5 power (power function)"
+.B " 6 linear (more speed, more acceleration)"
+.B " 7 limited (like linear, but maxes out at threshold)"
+.fi
+.RE
+.TP 7
+.BI "Option \*qConstantDeceleration\*q \*q" real \*q
+Makes the pointer go
+.B deceleration
+times slower than normal. Most useful for high-resolution devices.
+.TP 7
+.BI "Option \*qAdaptiveDeceleration\*q \*q" real \*q
+Allows to actually decelerate the pointer when going slow. At most, it will be
+.B adaptive deceleration
+times slower. Enables precise pointer placement without sacrificing speed.
+.TP 7
+.BI "Option \*qAccelerationScheme\*q \*q" string \*q
+Selects the scheme, which is the underlying algorithm.
+.PP
+.RS 7
+.nf
+.B "predictable default algorithm (behaving more predictable)"
+.B "lightweight old acceleration code (as specified in the X protocol spec)"
+.B "none no acceleration or deceleration"
+.fi
+.RE
+.TP 7
+.BI "Option \*qAccelerationNumerator\*q \*q" integer \*q
+.TP 7
+.BI "Option \*qAccelerationDenominator\*q \*q" integer \*q
+Set numerator and denominator of the acceleration factor. The acceleration
+factor is a rational which, together with threshold, can be used to tweak
+profiles to suit the users needs. The
+.B simple
+and
+.B limited
+profiles use it directly (i.e. they accelerate by the factor), for other
+profiles it should hold that a higher acceleration factor leads to a faster
+pointer. Typically, 1 is unaccelerated and values up to 5 are sensible.
+.TP 7
+.BI "Option \*qAccelerationThreshold\*q \*q" integer \*q
+Set the threshold, which is roughly the velocity (usually device units per 10
+ms) required for acceleration to become effective. The precise effect varies
+with the profile however.
+
.SH "INPUTCLASS SECTION"
The config file may have multiple
.B InputClass