213 lines
6.2 KiB
Groff
213 lines
6.2 KiB
Groff
'\" t
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.\" Copyright 1999 Oracle and/or its affiliates. All rights reserved.
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining a
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.\" copy of this software and associated documentation files (the "Software"),
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.\" to deal in the Software without restriction, including without limitation
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.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,
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.\" and/or sell copies of the Software, and to permit persons to whom the
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.\" Software is furnished to do so, subject to the following conditions:
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.\"
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.\" The above copyright notice and this permission notice (including the next
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.\" paragraph) shall be included in all copies or substantial portions of the
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.\" Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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.\" THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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.\" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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.\" FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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.\" DEALINGS IN THE SOFTWARE.
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.\"
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.TH XkbGetBounceKeysDelay __libmansuffix__ __xorgversion__ "XKB FUNCTIONS"
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.SH NAME
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XkbGetBounceKeysDelay \- Queries the current BounceKeys delay for a keyboard
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device.
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.SH SYNOPSIS
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.HP
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.B Bool XkbGetBounceKeysDelay
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.BI "(\^Display *" "display" "\^,"
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.BI "unsigned int " "device_spec" "\^,"
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.BI "unsigned int *" "delay_rtrn" "\^);"
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.if n .ti +5n
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.if t .ti +.5i
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.SH ARGUMENTS
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.TP
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.I \- display
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connection to X server
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.TP
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.I \- device_spec
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device ID, or XkbUseCoreKbd
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.TP
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.I \- delay_rtrn
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backfilled with bounce keys delay, ms
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.SH DESCRIPTION
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.LP
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The server can generate XkbAccessXNotify events for some of the global keyboard
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controls.
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The detail field describes what AccessX event just occurred and can be any of
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the values in
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Table 1.
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.TS
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c s
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l l
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l lw(4i).
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Table 1 AccessXNotify Events
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_
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detail Reason
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_
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XkbAXN_SKPress T{
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A key was pressed when SlowKeys was enabled.
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T}
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XkbAXN_SKAccept T{
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A key was accepted (held longer than the SlowKeys delay).
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T}
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XkbAXN_SKRelease T{
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An accepted SlowKeys key was released.
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T}
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XkbAXN_SKReject T{
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A key was rejected (released before the SlowKeys delay expired).
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T}
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XkbAXN_BKAccept T{
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A key was accepted by BounceKeys.
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T}
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XkbAXN_BKReject T{
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A key was rejected (pressed before the BounceKeys delay expired).
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T}
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XkbAXN_AXKWarning T{
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AccessXKeys is about to turn on/off StickyKeys or BounceKeys.
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T}
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.TE
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The
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.I keycode
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field reports the keycode of the key for which the event occurred. If the action
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is related to
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.I SlowKeys,
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the
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.I slowKeysDelay
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field contains the current SlowKeys acceptance delay. If the action is related
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to BounceKeys,
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the
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.I debounceDelay
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field contains the current BounceKeys debounce delay.
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Selecting for AccessX Events
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To receive XkbAccessXNotify events under all possible conditions, use
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.I XkbSelectEvents
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and pass XkbAccesXNotifyMask in both
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.I bits_to_change
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and
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.I values_for_bits.
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To receive XkbStateNotify events only under certain conditions, use
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.I XkbSelectEventDetails
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using XkbAccessXNotify as the
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.I event_type
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and specifying the desired state changes in
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.I bits_to_change
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and
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.I values_for_bits
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using mask bits from Table 2.
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.TS
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c s s
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l l l
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l l lw(3i).
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Table 2 AccessXNotify Event Details
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_
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XkbAccessXNotify Event Details Value Circumstances
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_
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XkbAXN_SKPressMask (1<<0) T{
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Slow key press notification wanted
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T}
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XkbAXN_SKAcceptMask (1<<1) T{
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Slow key accept notification wanted
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T}
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XkbAXN_SKRejectMask (1<<2) T{
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Slow key reject notification wanted
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T}
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XkbAXN_SKReleaseMask (1<<3) T{
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Slow key release notification wanted
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T}
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XkbAXN_BKAcceptMask (1<<4) T{
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Bounce key accept notification wanted
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T}
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XkbAXN_BKRejectMask (1<<5) T{
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Bounce key reject notification wanted
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T}
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XkbAXN_AXKWarningMask (1<<6) T{
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AccessX warning notification wanted
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T}
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XkbAllAccessXEventsMask (0x7f) T{
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All AccessX features notifications wanted
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T}
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.TE
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Some users may accidentally "bounce" on a key when they release it. They press
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it once, then accidentally press it again after they release it. The BounceKeys
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control temporarily disables a key after it has been pressed, effectively
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"debouncing" the keyboard. The period of time the key is disabled after it is
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released is known as the
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.I BounceKeys delay.
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BounceKeys is a boolean control.
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When the BounceKeys control is active, the server reports acceptance or
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rejection of any key to interested clients by sending an appropriate
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AccessXNotify event (see STRUCTURES).
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.I XkbGetBounceKeysDelay
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requests the attributes of the BounceKeys control from the server, waits for a
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reply, and backfills
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.I delay_rtrn
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with the BounceKeys delay attribute.
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.I XkbGetBounceKeysDelay
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returns True if successful; if a compatible version of the Xkb extension is not
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available in the server
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.I XkbGetSlowKeysDelay
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returns False.
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.SH "RETURN VALUES"
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.TP 15
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True
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The
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.I XkbGetBounceKeysDelay
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function returns True when it successfully requests the attributes of the
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BounceKeys control from the server, waits for a
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reply, and backfills
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.I delay_rtrn
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with the BounceKeys delay attribute.
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.TP 15
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False
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The
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.I XkbGetBounceKeysDelay
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function returns False if a compatible version of the Xkb extension is not
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available in the server.
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.SH STRUCTURES
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.LP
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The structure for the XkbAccessXNotify event type is as follows:
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.nf
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typedef struct {
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int type; /\(** Xkb extension base event code */
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unsigned long serial; /\(** X server serial number for event */
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Bool send_event; /\(** True => synthetically generated */
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Display * display; /\(** server connection where event generated */
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Time time; /\(** server time when event generated */
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int xkb_type; /\(** XkbAccessXNotify */
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int device; /\(** Xkb device ID, will not be XkbUseCoreKbd
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*/
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int detail; /\(** XkbAXN_* */
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KeyCode keycode; /\(** key of event */
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int slowKeysDelay; /\(** current SlowKeys delay */
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int debounceDelay; /\(** current debounce delay */
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} XkbAccessXNotifyEvent;
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.fi
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.SH "SEE ALSO"
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.BR XkbGetSlowKeysDelay (__libmansuffix__)
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