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authorrjohnson <rjohnson>1998-04-01 09:37:39 (GMT)
committerrjohnson <rjohnson>1998-04-01 09:37:39 (GMT)
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+'\"
+'\" Copyright (c) 1990 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.
+'\"
+'\" SCCS: @(#) option.n 1.10 96/03/26 18:25:08
+'\"
+.so man.macros
+.TH option n "" Tk "Tk Built-In Commands"
+.BS
+'\" Note: do not modify the .SH NAME line immediately below!
+.SH NAME
+option \- Add/retrieve window options to/from the option database
+.SH SYNOPSIS
+\fBoption add \fIpattern value \fR?\fIpriority\fR?
+.sp
+\fBoption clear\fR
+.sp
+\fBoption get \fIwindow name class\fR
+.sp
+\fBoption readfile \fIfileName \fR?\fIpriority\fR?
+.BE
+
+.SH DESCRIPTION
+.PP
+The \fBoption\fR command allows you to add entries to the Tk option
+database or to retrieve options from the database. The \fBadd\fR
+form of the command adds a new option to the database.
+\fIPattern\fR contains
+the option being specified, and consists of names and/or classes
+separated by asterisks or dots, in the usual X format. \fIValue\fR
+contains a text string to associate with \fIpattern\fR; this is the
+value that will be returned in calls to \fBTk_GetOption\fR or by
+invocations of the \fBoption get\fR command. If \fIpriority\fR
+is specified, it indicates the priority level for this option (see
+below for legal values); it defaults to \fBinteractive\fR.
+This command always returns an empty string.
+.PP
+The \fBoption clear\fR command clears the option database. Default
+options (from the
+\fBRESOURCE_MANAGER\fR property or the \fB.Xdefaults\fR
+file) will be reloaded automatically the next time an
+option is added to the database or removed from it. This command
+always returns an empty string.
+.PP
+The \fBoption get\fR command returns the value of the option
+specified for \fIwindow\fR
+under \fIname\fR and \fIclass\fR. If several entries in the option
+database match \fIwindow\fR, \fIname\fR, and \fIclass\fR, then
+the command returns whichever was created with highest
+\fIpriority\fR level. If there are several matching
+entries at the same priority level, then it returns whichever entry
+was most recently entered into the option database. If there are
+no matching entries, then the empty string is returned.
+.PP
+The \fBreadfile\fR form of the command reads \fIfileName\fR,
+which should have the standard format for an
+X resource database such as \fB.Xdefaults\fR, and adds all the
+options specified in that file to the option database. If \fIpriority\fR
+is specified, it indicates the priority level at which to enter the
+options; \fIpriority\fR defaults to \fBinteractive\fR.
+.PP
+The \fIpriority\fR arguments to the \fBoption\fR command are
+normally specified symbolically using one of the following values:
+.TP
+\fBwidgetDefault\fR
+Level 20. Used for default values hard-coded into widgets.
+.TP
+\fBstartupFile\fR
+Level 40. Used for options specified in application-specific
+startup files.
+.TP
+\fBuserDefault\fR
+Level 60. Used for options specified in user-specific defaults
+files, such as \fB.Xdefaults\fR, resource databases loaded into
+the X server, or user-specific startup files.
+.TP
+\fBinteractive\fR
+Level 80. Used for options specified interactively after the application
+starts running. If \fIpriority\fR isn't specified, it defaults to
+this level.
+.LP
+Any of the above keywords may be abbreviated. In addition, priorities
+may be specified numerically using integers between 0 and 100,
+inclusive. The numeric form is probably a bad idea except for new priority
+levels other than the ones given above.
+
+.SH KEYWORDS
+database, option, priority, retrieve