man/man3/Tk_HandleEvent.3 - toolchains/skids - Git at Google

 '\"
 '\" Copyright (c) 1990-1992 The Regents of the University of California.
 '\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
 '\"
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
 '\" RCS: @(#) $Id: HandleEvent.3,v 1.4 1999/04/21 21:53:22 rjohnson Exp $
 '\"
 '\" The definitions below are for supplemental macros used in Tcl/Tk
 '\" manual entries.
 '\"
 '\" .AP type name in/out ?indent?
 '\"	Start paragraph describing an argument to a library procedure.
 '\"	type is type of argument (int, etc.), in/out is either "in", "out",
 '\"	or "in/out" to describe whether procedure reads or modifies arg,
 '\"	and indent is equivalent to second arg of .IP (shouldn't ever be
 '\"	needed;  use .AS below instead)
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 '\"
 '\" .OP cmdName dbName dbClass
 '\"	Start of description of a specific option.  cmdName gives the
 '\"	option's name as specified in the class command, dbName gives
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 '\"	the option's class in the option database.
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 '\" .UL arg1 arg2
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 '\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
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 '\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
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 .TH Tk_HandleEvent 3 "" Tk "Tk Library Procedures"
 .BS
 .SH NAME
 Tk_HandleEvent \- invoke event handlers for window system events
 .SH SYNOPSIS
 .nf
 \fB#include <tk.h>\fR
 .sp
 \fBTk_HandleEvent\fR(\fIeventPtr\fR)
 .SH ARGUMENTS
 .AS XEvent *eventPtr
 .AP XEvent *eventPtr in
 Pointer to X event to dispatch to relevant handler(s).
 .BE

 .SH DESCRIPTION
 .PP
 \fBTk_HandleEvent\fR is a lower-level procedure that deals with window
 events.  It is called by \fBTcl_ServiceEvent\fR (and indirectly by
 \fBTk_DoOneEvent\fR), and in a few other cases within Tk.
 It makes callbacks to any window event
 handlers (created by calls to \fBTk_CreateEventHandler\fR)
 that match \fIeventPtr\fR and then returns.  In some cases
 it may be useful for an application to bypass the Tk event
 queue and call \fBTk_HandleEvent\fR directly instead of
 calling \fBTcl_QueueEvent\fR followed by
 \fBTcl_ServiceEvent\fR.
 .PP
 This procedure may be invoked recursively.  For example,
 it is possible to invoke \fBTk_HandleEvent\fR recursively
 from a handler called by \fBTk_HandleEvent\fR.  This sort
 of operation is useful in some modal situations, such
 as when a
 notifier has been popped up and an application wishes to
 wait for the user to click a button in the notifier before
 doing anything else.

 .SH KEYWORDS
 callback, event, handler, window
	'\"
	'\" Copyright (c) 1990-1992 The Regents of the University of California.
	'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
	'\"
	'\" See the file "license.terms" for information on usage and redistribution
	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	'\"
	'\" RCS: @(#) $Id: HandleEvent.3,v 1.4 1999/04/21 21:53:22 rjohnson Exp $
	'\"
	'\" The definitions below are for supplemental macros used in Tcl/Tk
	'\" manual entries.
	'\"
	'\" .AP type name in/out ?indent?
	'\" Start paragraph describing an argument to a library procedure.
	'\" type is type of argument (int, etc.), in/out is either "in", "out",
	'\" or "in/out" to describe whether procedure reads or modifies arg,
	'\" and indent is equivalent to second arg of .IP (shouldn't ever be
	'\" needed; use .AS below instead)
	'\"
	'\" .AS ?type? ?name?
	'\" Give maximum sizes of arguments for setting tab stops. Type and
	'\" name are examples of largest possible arguments that will be passed
	'\" to .AP later. If args are omitted, default tab stops are used.
	'\"
	'\" .BS
	'\" Start box enclosure. From here until next .BE, everything will be
	'\" enclosed in one large box.
	'\"
	'\" .BE
	'\" End of box enclosure.
	'\"
	'\" .CS
	'\" Begin code excerpt.
	'\"
	'\" .CE
	'\" End code excerpt.
	'\"
	'\" .VS ?version? ?br?
	'\" Begin vertical sidebar, for use in marking newly-changed parts
	'\" of man pages. The first argument is ignored and used for recording
	'\" the version when the .VS was added, so that the sidebars can be
	'\" found and removed when they reach a certain age. If another argument
	'\" is present, then a line break is forced before starting the sidebar.
	'\"
	'\" .VE
	'\" End of vertical sidebar.
	'\"
	'\" .DS
	'\" Begin an indented unfilled display.
	'\"
	'\" .DE
	'\" End of indented unfilled display.
	'\"
	'\" .SO
	'\" Start of list of standard options for a Tk widget. The
	'\" options follow on successive lines, in four columns separated
	'\" by tabs.
	'\"
	'\" .SE
	'\" End of list of standard options for a Tk widget.
	'\"
	'\" .OP cmdName dbName dbClass
	'\" Start of description of a specific option. cmdName gives the
	'\" option's name as specified in the class command, dbName gives
	'\" the option's name in the option database, and dbClass gives
	'\" the option's class in the option database.
	'\"
	'\" .UL arg1 arg2
	'\" Print arg1 underlined, then print arg2 normally.
	'\"
	'\" RCS: @(#) $Id: man.macros,v 1.4 2000/08/25 06:18:32 ericm Exp $
	'\"
	'\" # Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
	.if t .wh -1.3i ^B
	.nr ^l \n(.l
	.ad b
	'\" # Start an argument description
	.de AP
	.ie !"\\$4"" .TP \\$4
	.el \{\
	. ie !"\\$2"" .TP \\n()Cu
	. el .TP 15
	.\}
	.ta \\n()Au \\n()Bu
	.ie !"\\$3"" \{\
	\&\\$1 \\fI\\$2\\fP (\\$3)
	.\".b
	.\}
	.el \{\
	.br
	.ie !"\\$2"" \{\
	\&\\$1 \\fI\\$2\\fP
	.\}
	.el \{\
	\&\\fI\\$1\\fP
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	..
	'\" # define tabbing values for .AP
	.de AS
	.nr )A 10n
	.if !"\\$1"" .nr )A \\w'\\$1'u+3n
	.nr )B \\n()Au+15n
	.\"
	.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
	.nr )C \\n()Bu+\\w'(in/out)'u+2n
	..
	.AS Tcl_Interp Tcl_CreateInterp in/out
	'\" # BS - start boxed text
	'\" # ^y = starting y location
	'\" # ^b = 1
	.de BS
	.br
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	.\" Draw four-sided box normally, but don't draw top of
	.\" box if the box started on an earlier page.
	.ie !\\n(^b-1 \{\
	\h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
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	.\" draw two sides but no top otherwise.
	.ie !\\n(^b-1 \h'-1.5n'\L'\|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
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	.\}
	.if \\n(^v \{\
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	.RE
	.sp
	..
	'\" # SO - start of list of standard options
	.de SO
	.SH "STANDARD OPTIONS"
	.LP
	.nf
	.ta 5.5c 11c
	.ft B
	..
	'\" # SE - end of list of standard options
	.de SE
	.fi
	.ft R
	.LP
	See the \\fBoptions\\fR manual entry for details on the standard options.
	..
	'\" # OP - start of full description for a single option
	.de OP
	.LP
	.nf
	.ta 4c
	Command-Line Name: \\fB\\$1\\fR
	Database Name: \\fB\\$2\\fR
	Database Class: \\fB\\$3\\fR
	.fi
	.IP
	..
	'\" # CS - begin code excerpt
	.de CS
	.RS
	.nf
	.ta .25i .5i .75i 1i
	..
	'\" # CE - end code excerpt
	.de CE
	.fi
	.RE
	..
	.de UL
	\\$1\l'\|0\(ul'\\$2
	..
	.TH Tk_HandleEvent 3 "" Tk "Tk Library Procedures"
	.BS
	.SH NAME
	Tk_HandleEvent \- invoke event handlers for window system events
	.SH SYNOPSIS
	.nf
	\fB#include <tk.h>\fR
	.sp
	\fBTk_HandleEvent\fR(\fIeventPtr\fR)
	.SH ARGUMENTS
	.AS XEvent *eventPtr
	.AP XEvent *eventPtr in
	Pointer to X event to dispatch to relevant handler(s).
	.BE

	.SH DESCRIPTION
	.PP
	\fBTk_HandleEvent\fR is a lower-level procedure that deals with window
	events. It is called by \fBTcl_ServiceEvent\fR (and indirectly by
	\fBTk_DoOneEvent\fR), and in a few other cases within Tk.
	It makes callbacks to any window event
	handlers (created by calls to \fBTk_CreateEventHandler\fR)
	that match \fIeventPtr\fR and then returns. In some cases
	it may be useful for an application to bypass the Tk event
	queue and call \fBTk_HandleEvent\fR directly instead of
	calling \fBTcl_QueueEvent\fR followed by
	\fBTcl_ServiceEvent\fR.
	.PP
	This procedure may be invoked recursively. For example,
	it is possible to invoke \fBTk_HandleEvent\fR recursively
	from a handler called by \fBTk_HandleEvent\fR. This sort
	of operation is useful in some modal situations, such
	as when a
	notifier has been popped up and an application wishes to
	wait for the user to click a button in the notifier before
	doing anything else.

	.SH KEYWORDS
	callback, event, handler, window