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- '\" $Header: /user6/ouster/wish/man/RCS/option.n,v 1.5 93/04/01 09:52:48 ouster Exp $ SPRITE (Berkeley)
- '/"
- .\" The definitions below are for supplemental macros used in Tcl/Tk
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- '\" # Heading for Tcl/Tk man pages
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- .HS option tk
- .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
-