| '\" |
| '\" Copyright (c) 1997 DSC Technologies Corporation |
| '\" |
| '\" See the file "license.terms" for information on usage and redistribution |
| '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| '\" |
| '\" @(#) scopedobject.n 1.21 97/1/30 16:04:44 |
| '\" |
| '\" The definitions below are for supplemental macros used in Tcl/Tk |
| '\" manual entries. |
| '\" |
| '\" .HS name section [date [version]] |
| '\" Replacement for .TH in other man pages. See below for valid |
| '\" section names. |
| '\" |
| '\" .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 |
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| '\" |
| '\" .VS |
| '\" Begin vertical sidebar, for use in marking newly-changed parts |
| '\" of man pages. |
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| '\" .DE |
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| '\" |
| '\" @(#) man.macros 1.1 94/08/09 13:07:19 |
| .\" |
| '\" # Heading for Tcl/Tk man pages |
| .de HS |
| .ds ^3 \\0 |
| .if !"\\$3"" .ds ^3 \\$3 |
| .if '\\$2'cmds' .TH "\\$1" 1 "\\*(^3" "\\$4" "\\$5" |
| .if '\\$2'lib' .TH "\\$1" 3 "\\*(^3" "\\$4" "\\$5" |
| .if '\\$2'ncmds' .TH "\\$1" n "\\*(^3" "\\$4" "\\$5" |
| .if '\\$2'tcl' .TH "\\$1" n "\\*(^3" Tcl "Tcl Built-In Commands" |
| .if '\\$2'tk' .TH "\\$1" n "\\*(^3" Tk "Tk Commands" |
| .if '\\$2'tclc' .TH "\\$1" 3 "\\*(^3" Tcl "Tcl Library Procedures" |
| .if '\\$2'tkc' .TH "\\$1" 3 "\\*(^3" Tk "Tk Library Procedures" |
| .if '\\$2'tclcmds' .TH "\\$1" 1 "\\*(^3" Tk "Tcl Applications" |
| .if '\\$2'tkcmds' .TH "\\$1" 1 "\\*(^3" Tk "Tk Applications" |
| .if '\\$2'iwid' .TH "\\$1" 1 "\\*(^3" Tk "[incr Widgets]" |
| .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 |
| .\} |
| .ie !"\\$3"" \{\ |
| .ta \\n()Au \\n()Bu |
| \&\\$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 |
| .. |
| '\" # BS - start boxed text |
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| '\" # ^b = 1 |
| .de BS |
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| .de BE |
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| .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. |
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| \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' |
| .\} |
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| '\" # ^Y = starting y location |
| '\" # ^v = 1 (for troff; for nroff this doesn't matter) |
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| .el .nr ^v 1u |
| .. |
| '\" # VE - end of vertical sidebar |
| .de VE |
| .ie n 'mc |
| .el \{\ |
| .ev 2 |
| .nf |
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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 |
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| .\} |
| .nr ^v 0 |
| .. |
| '\" # Special macro to handle page bottom: finish off current |
| '\" # 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 \{\ |
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| .nr ^b 2 |
| .\} |
| .if \\n(^v \{\ |
| .mk ^Y |
| .\} |
| .. |
| '\" # DS - begin display |
| .de DS |
| .RS |
| .nf |
| .sp |
| .. |
| '\" # DE - end display |
| .de DE |
| .fi |
| .RE |
| .sp |
| .. |
| .HS scopedobject iwid |
| .BS |
| '\" Note: do not modify the .SH NAME line immediately below! |
| .SH NAME |
| scopedobject \- Create and manipulate a scoped \[incr Tcl\] class object. |
| .SH SYNOPSIS |
| \fBscopedobject\fI \fIobjName \fR?\fIoptions\fR? |
| .SH "INHERITANCE" |
| None |
| .SH "STANDARD OPTIONS" |
| .LP |
| .nf |
| Name: \fBenterscopecommand:\fR |
| Command-Line Switch: \fB-enterscopecommand\fR |
| .fi |
| .IP |
| Specifies a Tcl command to invoke when an object enters scope |
| (i.e. when it is created..). The default is {}. |
| .LP |
| .nf |
| Name: \fBenterscopecommand:\fR |
| Command-Line Switch: \fB-enterscopecommand\fR |
| .fi |
| .IP |
| Specifies a Tcl command to invoke when an object exits scope |
| (i.e. when it is deleted..). The default is {}. |
| .LP |
| .BE |
| |
| .SH DESCRIPTION |
| .PP |
| The \fBscopedobject\fR command creates a base class for defining |
| Itcl classes which posses scoped behavior like Tcl variables. |
| The objects are only accessible within the procedure in which |
| they are instantiated and are deleted when the procedure returns. |
| This class was designed to be a general purpose base class for |
| supporting scoped incr Tcl classes. The options include the |
| execute a Tcl script command when an object enters and exits its |
| scope. |
| .SH "METHODS" |
| .PP |
| The \fBscopedobject\fR command creates a new Tcl command whose |
| name is \fIpathName\fR. This |
| command may be used to invoke various operations on the object. |
| It has the following general form: |
| .DS C |
| \fIpathName option \fR?\fIarg arg ...\fR? |
| .DE |
| \fIOption\fR and the \fIarg\fRs |
| determine the exact behavior of the command. The following |
| commands are possible for scopedobject objects: |
| .SH "OBJECT-SPECIFIC METHODS" |
| .TP |
| \fIpathName \fBcget\fR \fIoption\fR |
| Returns the current value of the configuration option given |
| by \fIoption\fR. |
| \fIOption\fR may have any of the values accepted by the \fBscopedobject\fR |
| command. |
| .TP |
| \fIpathName\fR \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR? |
| Query or modify the configuration options of the object. |
| If no \fIoption\fR is specified, returns a list describing all of |
| the available options for \fIpathName\fR. If \fIoption\fR is specified |
| with no \fIvalue\fR, then the command returns a list describing the |
| one named option (this list will be identical to the corresponding |
| sublist of the value returned if no \fIoption\fR is specified). If |
| one or more \fIoption\-value\fR pairs are specified, then the command |
| modifies the given objects option(s) to have the given value(s); in |
| this case the command returns an empty string. |
| \fIOption\fR may have any of the values accepted by the \fBscopedobject\fR |
| command. |
| |
| .SH EXAMPLE |
| .IP |
| The scopedobject was primarily meant to be a base class. The |
| following is an example of usage without inheritance: |
| .LP |
| .DS |
| proc scopedobject_demo {} { |
| iwidgets::scopedobject #auto \ |
| -exitscopecommand {puts "enter scopedobject_demo"} \ |
| -exitscopecommand {puts "exit scopedobject_demo"} |
| } |
| |
| scopedobject_demo |
| |
| .DE |
| .SH AUTHOR |
| John A. Tucker |
| .SH KEYWORDS |
| scopedobject, object |