'\"
'\" 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: MainLoop.3,v 1.2 1998/09/14 18:22:52 stanton 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",
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'\"	needed;  use .AS below instead)
'\"
'\" .AS ?type? ?name?
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'\" .BS
'\"	Start box enclosure.  From here until next .BE, everything will be
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'\" .VS ?version? ?br?
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'\"	End of vertical sidebar.
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'\"	Begin an indented unfilled display.
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'\"	End of indented unfilled display.
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'\"	Start of list of standard options for a Tk widget.  The
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'\" .SE
'\"	End of list of standard options for a Tk widget.
'\"
'\" .OP cmdName dbName dbClass
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'\" .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
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.ta \\n()Au \\n()Bu
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\&\\$1	\\fI\\$2\\fP	(\\$3)
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.el \{\
.br
.ie !"\\$2"" \{\
\&\\$1	\\fI\\$2\\fP
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.el \{\
\&\\fI\\$1\\fP
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..
'\"	# define tabbing values for .AP
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.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
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.if n .fi
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.ie n \l'\\n(^lu\(ul'
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\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
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.nr ^b 0
..
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.ev 2
'ti 0
'nf
.mk ^t
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..
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.RS
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.sp
..
'\"	# DE - end display
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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
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.RS
.nf
.ta .25i .5i .75i 1i
..
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..
.de UL
\\$1\l'|0\(ul'\\$2
..
.TH Tk_MainLoop 3 "" Tk "Tk Library Procedures"
.BS
.SH NAME
Tk_MainLoop \- loop for events until all windows are deleted
.SH SYNOPSIS
.nf
\fB#include <tk.h>\fR
.sp
\fBTk_MainLoop\fR()
.BE

.SH DESCRIPTION
.PP
\fBTk_MainLoop\fR is a procedure that loops repeatedly calling
\fBTcl_DoOneEvent\fR.  It returns only when there are no applications
left in this process (i.e. no main windows exist anymore).  Most
windowing applications will call \fBTk_MainLoop\fR after
initialization; the main execution of the application will consist
entirely of callbacks invoked via \fBTcl_DoOneEvent\fR.

.SH KEYWORDS
application, event, main loop