2006-11-25 09:33:55 -07:00
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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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.\\$1D \\$2 \\$1
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2013-04-28 10:55:55 -06:00
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.ft CW
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2006-11-25 09:33:55 -07:00
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.\".ps \\n(PS
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.\".if \\n(VS>=40 .vs \\n(VSu
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.\".if \\n(VS<=39 .vs \\n(VSp
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..
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.de De
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.ce 0
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.if \\n(BD .DF
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.nr BD 0
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.in \\n(OIu
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.if \\n(TM .ls 2
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.sp \\n(DDu
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.fi
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..
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.de IN \" send an index entry to the stderr
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..
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.de Pn
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.ie t \\$1\fB\^\\$2\^\fR\\$3
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.el \\$1\fI\^\\$2\^\fP\\$3
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..
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.de ZN
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.ie t \fB\^\\$1\^\fR\\$2
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.el \fI\^\\$1\^\fP\\$2
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..
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.de hN
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.ie t <\fB\\$1\fR>\\$2
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.el <\fI\\$1\fP>\\$2
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..
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.ny0
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.TH XGrabKeyboard __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XGrabKeyboard, XUngrabKeyboard \- grab the keyboard
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.SH SYNTAX
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.HP
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int XGrabKeyboard\^(\^Display *\fIdisplay\fP\^, Window \fIgrab_window\fP\^,
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Bool \fIowner_events\fP\^, int \fIpointer_mode\fP\^, int
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\fIkeyboard_mode\fP\^, Time \fItime\fP\^);
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.HP
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int XUngrabKeyboard\^(\^Display *\fIdisplay\fP\^, Time \fItime\fP\^);
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.SH ARGUMENTS
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIgrab_window\fP 1i
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Specifies the grab window.
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.IP \fIkeyboard_mode\fP 1i
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Specifies further processing of keyboard events.
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You can pass
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.ZN GrabModeSync
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or
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.ZN GrabModeAsync .
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.IP \fIowner_events\fP 1i
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Specifies a Boolean value that indicates whether the keyboard events
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are to be reported as usual.
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.IP \fIpointer_mode\fP 1i
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Specifies further processing of pointer events.
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You can pass
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.ZN GrabModeSync
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or
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.ZN GrabModeAsync .
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.IP \fItime\fP 1i
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Specifies the time.
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You can pass either a timestamp or
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.ZN CurrentTime .
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.SH DESCRIPTION
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The
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.ZN XGrabKeyboard
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function actively grabs control of the keyboard and generates
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.ZN FocusIn
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and
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.ZN FocusOut
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events.
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Further key events are reported only to the
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grabbing client.
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.ZN XGrabKeyboard
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overrides any active keyboard grab by this client.
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If owner_events is
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.ZN False ,
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all generated key events are reported with
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respect to grab_window.
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If owner_events is
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.ZN True
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and if a generated
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key event would normally be reported to this client, it is reported
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normally; otherwise, the event is reported with respect to the
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grab_window.
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Both
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.ZN KeyPress
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and
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.ZN KeyRelease
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events are always reported,
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independent of any event selection made by the client.
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.LP
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If the keyboard_mode argument is
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.ZN GrabModeAsync ,
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keyboard event processing continues
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as usual.
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If the keyboard is currently frozen by this client,
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then processing of keyboard events is resumed.
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If the keyboard_mode argument is
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.ZN GrabModeSync ,
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the state of the keyboard (as seen by client applications) appears to freeze,
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and the X server generates no further keyboard events until the
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grabbing client issues a releasing
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.ZN XAllowEvents
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call or until the keyboard grab is released.
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Actual keyboard changes are not lost while the keyboard is frozen;
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they are simply queued in the server for later processing.
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.LP
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If pointer_mode is
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.ZN GrabModeAsync ,
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pointer event processing is unaffected
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by activation of the grab.
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If pointer_mode is
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.ZN GrabModeSync ,
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the state of the pointer (as seen by client applications) appears to freeze,
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and the X server generates no further pointer events
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until the grabbing client issues a releasing
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.ZN XAllowEvents
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call or until the keyboard grab is released.
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Actual pointer changes are not lost while the pointer is frozen;
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they are simply queued in the server for later processing.
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.LP
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If the keyboard is actively grabbed by some other client,
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.ZN XGrabKeyboard
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fails and returns
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.ZN AlreadyGrabbed .
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If grab_window is not viewable,
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it fails and returns
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.ZN GrabNotViewable .
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If the keyboard is frozen by an active grab of another client,
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it fails and returns
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.ZN GrabFrozen .
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If the specified time is earlier than the last-keyboard-grab time
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or later than the current X server time,
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it fails and returns
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.ZN GrabInvalidTime .
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Otherwise, the last-keyboard-grab time is set to the specified time
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.Pn ( CurrentTime
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is replaced by the current X server time).
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.LP
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.ZN XGrabKeyboard
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can generate
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.ZN BadValue
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and
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.ZN BadWindow
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errors.
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.LP
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The
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.ZN XUngrabKeyboard
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function
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releases the keyboard and any queued events if this client has it actively grabbed from
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either
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.ZN XGrabKeyboard
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or
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.ZN XGrabKey .
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.ZN XUngrabKeyboard
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does not release the keyboard and any queued events
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if the specified time is earlier than
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the last-keyboard-grab time or is later than the current X server time.
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It also generates
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.ZN FocusIn
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and
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.ZN FocusOut
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events.
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The X server automatically performs an
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.ZN UngrabKeyboard
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request if the event window for an
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active keyboard grab becomes not viewable.
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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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.TP 1i
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.ZN BadWindow
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A value for a Window argument does not name a defined Window.
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.SH "SEE ALSO"
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2010-05-18 13:37:28 -06:00
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XAllowEvents(__libmansuffix__),
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XGrabButton(__libmansuffix__),
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XGrabKey(__libmansuffix__),
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XGrabPointer(__libmansuffix__)
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2006-11-25 09:33:55 -07:00
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.br
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\fI\*(xL\fP
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