250 lines
5.5 KiB
Plaintext
250 lines
5.5 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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.na
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.de Ds
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.nf
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.ny0
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.TH XSetInputFocus 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
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.SH NAME
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XSetInputFocus, XGetInputFocus \- control input focus
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.SH SYNTAX
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.\" $Header: XSetInFocus.f,v 1.1 88/02/26 10:03:18 mento Exp $
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XSetInputFocus\^(\^\fIdisplay\fP, \fIfocus\fP\^, \fIrevert_to\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 \fIfocus\fP\^;
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.br
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int \fIrevert_to\fP\^;
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.br
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Time \fItime\fP\^;
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.LP
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.\" $Header: XGetInFocus.f,v 1.1 88/02/26 10:00:48 mento Exp $
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XGetInputFocus\^(\^\fIdisplay\fP, \fIfocus_return\fP\^, \fIrevert_to_return\fP\^)
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.br
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Display *\fIdisplay\fP\^;
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.br
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Window *\fIfocus_return\fP\^;
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.br
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int *\fIrevert_to_return\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 \fIfocus\fP 1i
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Specifies the window,
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.ZN PointerRoot ,
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or
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.ZN None .
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.\" $Header: focus.a,v 1.2 88/05/14 08:56:12 mento Exp $
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.IP \fIfocus_return\fP 1i
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Returns the focus window,
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.ZN PointerRoot ,
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or
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.ZN None .
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.\" $Header: revertto.a,v 1.4 88/08/19 20:33:14 mento Exp $
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.IP \fIrevert_to\fP 1i
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Specifies where the input focus reverts to if the window becomes not
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viewable.
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You can pass
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.ZN RevertToParent ,
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.ZN RevertToPointerRoot ,
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or
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.ZN RevertToNone .
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.\" $Header: reverttoret.a,v 1.3 88/05/14 08:57:31 mento Exp $
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.IP \fIrevert_to_return\fP 1i
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Returns the current focus state
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.Pn ( RevertToParent ,
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.ZN RevertToPointerRoot ,
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or
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.ZN RevertToNone ).
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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: XSetInFocus.d,v 1.2 88/06/11 07:53:17 mento Exp $
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The
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.ZN XSetInputFocus
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function changes the input focus and the last-focus-change time.
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It has no effect if the specified time is earlier than the current
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last-focus-change time or is later than the current X server time.
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Otherwise, the last-focus-change 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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.ZN XSetInputFocus
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causes the X server to generate
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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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.LP
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Depending on the focus argument,
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the following occurs:
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.IP \(bu 5
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If focus is
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.ZN None ,
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all keyboard events are discarded until a new focus window is set,
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and the revert_to argument is ignored.
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.IP \(bu 5
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If focus is a window,
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it becomes the keyboard's focus window.
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If a generated keyboard event would normally be reported to this window
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or one of its inferiors, the event is reported as usual.
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Otherwise, the event is reported relative to the focus window.
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.IP \(bu 5
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If focus is
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.ZN PointerRoot ,
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the focus window is dynamically taken to be the root window of whatever screen
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the pointer is on at each keyboard event.
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In this case, the revert_to argument is ignored.
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.LP
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The specified focus window must be viewable at the time
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.ZN XSetInputFocus
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is called,
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or a
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.ZN BadMatch
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error results.
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If the focus window later becomes not viewable,
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the X server
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evaluates the revert_to argument to determine the new focus window as follows:
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.IP \(bu 5
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If revert_to is
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.ZN RevertToParent ,
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the focus reverts to the parent (or the closest viewable ancestor),
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and the new revert_to value is taken to be
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.ZN RevertToNone .
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.IP \(bu 5
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If revert_to is
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.ZN RevertToPointerRoot
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or
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.ZN RevertToNone ,
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the focus reverts to
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.ZN PointerRoot
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or
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.ZN None ,
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respectively.
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When the focus reverts,
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the X server generates
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.ZN FocusIn
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and
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.ZN FocusOut
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events, but the last-focus-change time is not affected.
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.LP
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.ZN XSetInputFocus
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can generate
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.ZN BadMatch ,
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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: XGetInFocus.d,v 1.2 88/05/14 08:58:23 mento Exp $
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The
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.ZN XGetInputFocus
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function returns the focus window and the current focus state.
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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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XWarpPointer(3X11)
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.br
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\fI\*(xL\fP
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