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

 '\"
 '\" Copyright (c) 2000 Ajuba Solutions.
 '\"
 '\" See the file "license.terms" for information on usage and redistribution
 '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 '\"
 '\" RCS: @(#) $Id: CrtCmHdlr.3,v 1.3 2003/01/21 20:24:40 hunt 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
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 '\"	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.
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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.
 .if t .wh -1.3i ^B
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 .ie !"\\$4"" .TP \\$4
 .el \{\
 .   ie !"\\$2"" .TP \\n()Cu
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 \&\\$1	\\fI\\$2\\fP	(\\$3)
 .\".b
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 .AS Tcl_Interp Tcl_CreateInterp in/out
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 .\}
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 See the \\fBoptions\\fR manual entry for details on the standard options.
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 Command-Line Name:	\\fB\\$1\\fR
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 .TH Tk_CreateClientMessageHandler 3 "8.4" Tk "Tk Library Procedures"
 .BS
 .SH NAME
 Tk_CreateClientMessageHandler, Tk_DeleteClientMessageHandler \- associate procedure callback with ClientMessage type X events
 .SH SYNOPSIS
 .nf
 \fB#include <tk.h>\fR
 .sp
 \fBTk_CreateClientMessageHandler\fR(\fIproc\fR)
 .sp
 \fBTk_DeleteClientMessageHandler\fR(\fIproc\fR)
 .SH ARGUMENTS
 .AP Tk_ClientMessageProc *proc in
 Procedure to invoke whenever a ClientMessage X event occurs on any display.
 .BE

 .SH DESCRIPTION
 .PP

 \fBTk_CreateClientMessageHandler\fR arranges for \fIproc\fR to be invoked
 in the future whenever a ClientMessage X event occurs that isn't handled by
 \fBWM_PROTOCOL\fR.  \fBTk_CreateClientMessageHandler\fR is intended for use
 by applications which need to watch X ClientMessage events, such as drag and
 drop applications.
 .PP
 The callback to \fIproc\fR will be made by \fBTk_HandleEvent\fR;
 this mechanism only works in programs that dispatch events
 through \fBTk_HandleEvent\fR (or through other Tk procedures that
 call \fBTk_HandleEvent\fR, such as \fBTk_DoOneEvent\fR or
 \fBTk_MainLoop\fR).
 .PP
 \fIProc\fR should have arguments and result that match the
 type \fBTk_ClientMessageProc\fR:
 .CS
 typedef int Tk_ClientMessageProc(
 	Tk_Window \fItkwin\fR,
 	XEvent *\fIeventPtr\fR);
 .CE
 The \fItkwin\fR parameter to \fIproc\fR is the Tk window which is
 associated with this event.  \fIEventPtr\fR is a pointer to the X event.
 .PP
 Whenever an X ClientMessage event is processed by \fBTk_HandleEvent\fR,
 the \fIproc\fR is called if it wasn't handled as a \fBWM_PROTOCOL\fR.
 The return value from \fIproc\fR is normally 0.
 A non-zero return value indicates that the event is not to be handled
 further; that is, \fIproc\fR has done all processing that is to be
 allowed for the event.
 .PP
 If there are multiple ClientMessage event handlers, each one is called
 for each event, in the order in which they were established.
 .PP
 \fBTk_DeleteClientMessageHandler\fR may be called to delete a
 previously-created ClientMessage event handler: it deletes each handler it
 finds that matches the \fIproc\fR argument.  If no such handler exists,
 then \fBTk_DeleteClientMessageHandler\fR returns without doing anything.
 Although Tk supports it, it's probably a bad idea to have more than one
 callback with the same \fIproc\fR argument.

 .SH KEYWORDS
 bind, callback, event, handler
	'\"
	'\" Copyright (c) 2000 Ajuba Solutions.
	'\"
	'\" See the file "license.terms" for information on usage and redistribution
	'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
	'\"
	'\" RCS: @(#) $Id: CrtCmHdlr.3,v 1.3 2003/01/21 20:24:40 hunt 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
	.\}
	.\}
	..
	'\" # 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
	.mk ^y
	.nr ^b 1u
	.if n .nf
	.if n .ti 0
	.if n \l'\\n(.lu\(ul'
	.if n .fi
	..
	'\" # BE - end boxed text (draw box now)
	.de BE
	.nf
	.ti 0
	.mk ^t
	.ie n \l'\\n(^lu\(ul'
	.el \{\
	.\" 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'
	.\}
	.el \}\
	\h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'\|0u-1.5n\(ul'
	.\}
	.\}
	.fi
	.br
	.nr ^b 0
	..
	'\" # VS - start vertical sidebar
	'\" # ^Y = starting y location
	'\" # ^v = 1 (for troff; for nroff this doesn't matter)
	.de VS
	.if !"\\$2"" .br
	.mk ^Y
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	.el .nr ^v 1u
	..
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	.de VE
	.ie n 'mc
	.el \{\
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	\h'\|\\n(^lu+3n'\L'\|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-\|\\n(^lu+3n'
	.sp -1
	.fi
	.ev
	.\}
	.nr ^v 0
	..
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	'\" # box/sidebar if in box/sidebar mode, then invoked standard
	'\" # page bottom macro.
	.de ^B
	.ev 2
	'ti 0
	'nf
	.mk ^t
	.if \\n(^b \{\
	.\" Draw three-sided box if this is the box's first page,
	.\" 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
	.el \h'-1.5n'\L'\|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'\|0u'\c
	.\}
	.if \\n(^v \{\
	.nr ^x \\n(^tu+1v-\\n(^Yu
	\kx\h'-\\nxu'\h'\|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'\|0u'\c
	.\}
	.bp
	'fi
	.ev
	.if \\n(^b \{\
	.mk ^y
	.nr ^b 2
	.\}
	.if \\n(^v \{\
	.mk ^Y
	.\}
	..
	'\" # DS - begin display
	.de DS
	.RS
	.nf
	.sp
	..
	'\" # DE - end display
	.de DE
	.fi
	.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_CreateClientMessageHandler 3 "8.4" Tk "Tk Library Procedures"
	.BS
	.SH NAME
	Tk_CreateClientMessageHandler, Tk_DeleteClientMessageHandler \- associate procedure callback with ClientMessage type X events
	.SH SYNOPSIS
	.nf
	\fB#include <tk.h>\fR
	.sp
	\fBTk_CreateClientMessageHandler\fR(\fIproc\fR)
	.sp
	\fBTk_DeleteClientMessageHandler\fR(\fIproc\fR)
	.SH ARGUMENTS
	.AP Tk_ClientMessageProc *proc in
	Procedure to invoke whenever a ClientMessage X event occurs on any display.
	.BE

	.SH DESCRIPTION
	.PP

	\fBTk_CreateClientMessageHandler\fR arranges for \fIproc\fR to be invoked
	in the future whenever a ClientMessage X event occurs that isn't handled by
	\fBWM_PROTOCOL\fR. \fBTk_CreateClientMessageHandler\fR is intended for use
	by applications which need to watch X ClientMessage events, such as drag and
	drop applications.
	.PP
	The callback to \fIproc\fR will be made by \fBTk_HandleEvent\fR;
	this mechanism only works in programs that dispatch events
	through \fBTk_HandleEvent\fR (or through other Tk procedures that
	call \fBTk_HandleEvent\fR, such as \fBTk_DoOneEvent\fR or
	\fBTk_MainLoop\fR).
	.PP
	\fIProc\fR should have arguments and result that match the
	type \fBTk_ClientMessageProc\fR:
	.CS
	typedef int Tk_ClientMessageProc(
	Tk_Window \fItkwin\fR,
	XEvent *\fIeventPtr\fR);
	.CE
	The \fItkwin\fR parameter to \fIproc\fR is the Tk window which is
	associated with this event. \fIEventPtr\fR is a pointer to the X event.
	.PP
	Whenever an X ClientMessage event is processed by \fBTk_HandleEvent\fR,
	the \fIproc\fR is called if it wasn't handled as a \fBWM_PROTOCOL\fR.
	The return value from \fIproc\fR is normally 0.
	A non-zero return value indicates that the event is not to be handled
	further; that is, \fIproc\fR has done all processing that is to be
	allowed for the event.
	.PP
	If there are multiple ClientMessage event handlers, each one is called
	for each event, in the order in which they were established.
	.PP
	\fBTk_DeleteClientMessageHandler\fR may be called to delete a
	previously-created ClientMessage event handler: it deletes each handler it
	finds that matches the \fIproc\fR argument. If no such handler exists,
	then \fBTk_DeleteClientMessageHandler\fR returns without doing anything.
	Although Tk supports it, it's probably a bad idea to have more than one
	callback with the same \fIproc\fR argument.

	.SH KEYWORDS
	bind, callback, event, handler