272 lines
6.5 KiB
Plaintext
272 lines
6.5 KiB
Plaintext
.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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.ny0
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.TH XGrabKeyboard 3X11 "Release 5" "X Version 11" "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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.\" $Header: XGrabKeybd.f,v 1.1 88/02/26 10:01:05 mento Exp $
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int XGrabKeyboard\^(\^\fIdisplay\fP, \fIgrab_window\fP\^, \fIowner_events\fP\^, \fIpointer_mode\fP\^, \fIkeyboard_mode\fP\^, \fItime\fP\^)
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.br
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Display *\fIdisplay\fP\^;
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.br
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Window \fIgrab_window\fP\^;
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.br
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Bool \fIowner_events\fP\^;
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.br
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int \fIpointer_mode\fP\^, \fIkeyboard_mode\fP\^;
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.br
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Time \fItime\fP\^;
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.LP
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.\" $Header: XUngrabKeybd.f,v 1.1 88/02/26 10:04:05 mento Exp $
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XUngrabKeyboard\^(\^\fIdisplay\fP, \fItime\fP\^)
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.br
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Display *\fIdisplay\fP\^;
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.br
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Time \fItime\fP\^;
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.SH ARGUMENTS
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.\" $Header: display.a,v 1.1 88/02/26 10:26:29 mento Exp $
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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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.\" $Header: keybdmode.a,v 1.3 88/04/06 14:22:10 mento Exp $
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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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.\" $Header: ownerevents2.a,v 1.3 88/05/14 07:32:25 mento Exp $
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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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.\" $Header: pointermode.a,v 1.3 88/04/06 14:21:24 mento Exp $
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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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.\" $Header: XGrabKeybd.d,v 1.4 88/08/19 20:27:03 mento Exp $
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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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.\" $Header: XUngrabKeybd.d,v 1.2 88/06/11 07:54:22 mento Exp $
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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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.\" $Header: badvalue.e,v 1.1 87/09/04 08:23:19 mento Exp $
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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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.\" $Header: badwindow.e,v 1.1 87/09/04 08:23:20 mento Exp $
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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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XAllowEvents(3X11),
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XGrabButton(3X11),
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XGrabKey(3X11),
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XGrabPointer(3X11)
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.br
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\fI\*(xL\fP
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