'\"
'\" Copyright (c) 1994 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: clipboard.n,v 1.1.1.1 2007/07/10 15:05:16 duncan 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 1.1.1.1 2007/07/10 15:05:16 duncan 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
.ie n 'mc \s12\(br\s0
.el .nr ^v 1u
..
'\"	# VE - end of vertical sidebar
.de VE
.ie n 'mc
.el \{\
.ev 2
.nf
.ti 0
.mk ^t
\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
..
'\"	# 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 \{\
.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 clipboard n 8.4 Tk "Tk Built-In Commands"
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
clipboard \- Manipulate Tk clipboard
.SH SYNOPSIS
\fBclipboard \fIoption\fR ?\fIarg arg ...\fR?
.BE

.SH DESCRIPTION
.PP
This command provides a Tcl interface to the Tk clipboard,
which stores data for later retrieval using the selection mechanism 
(via the \fB-selection CLIPBOARD\fR option).
In order to copy data into the clipboard, \fBclipboard clear\fR must
be called, followed by a sequence of one or more calls to \fBclipboard
append\fR.  To ensure that the clipboard is updated atomically, all
appends should be completed before returning to the event loop.
.PP
The first argument to \fBclipboard\fR determines the format of the
rest of the arguments and the behavior of the command.  The following
forms are currently supported:
.PP
.TP
\fBclipboard clear\fR ?\fB\-displayof\fR \fIwindow\fR?
Claims ownership of the clipboard on \fIwindow\fR's display and removes
any previous contents.  \fIWindow\fR defaults to ``.''.  Returns an
empty string.
.TP
\fBclipboard append\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-format\fR \fIformat\fR? ?\fB\-type\fR \fItype\fR? ?\fB\-\|\-\fR? \fIdata\fR
Appends \fIdata\fR to the clipboard on \fIwindow\fR's
display in the form given by \fItype\fR with the representation given
by \fIformat\fR and claims ownership of the clipboard on \fIwindow\fR's
display.
.RS
.PP
\fIType\fR specifies the form in which the selection is to be returned
(the desired ``target'' for conversion, in ICCCM terminology), and
should be an atom name such as STRING or FILE_NAME; see the
Inter-Client Communication Conventions Manual for complete details.
\fIType\fR defaults to STRING.
.PP
The \fIformat\fR argument specifies the representation that should be
used to transmit the selection to the requester (the second column of
Table 2 of the ICCCM), and defaults to STRING.  If \fIformat\fR is
STRING, the selection is transmitted as 8-bit ASCII characters.  If
\fIformat\fR is ATOM, then the \fIdata\fR is
divided into fields separated by white space; each field is converted
to its atom value, and the 32-bit atom value is transmitted instead of
the atom name.  For any other \fIformat\fR,  \fIdata\fR is divided
into fields separated by white space and each 
field is converted to a 32-bit integer; an array of integers is
transmitted to the selection requester.  Note that strings passed to
\fBclipboard append\fR are concatenated before conversion, so the
caller must take care to ensure appropriate spacing across string
boundaries.  All items appended to the clipboard with the same
\fItype\fR must have the same \fIformat\fR.
.PP
The \fIformat\fR argument is needed only for compatibility with
clipboard requesters that don't use Tk.  If the Tk toolkit is being
used to retrieve the CLIPBOARD selection then the value is converted back to
a string at the requesting end, so \fIformat\fR is
irrelevant.
.PP
A \fB\-\|\-\fR argument may be specified to mark the end of options:  the
next argument will always be used as \fIdata\fR.
This feature may be convenient if, for example, \fIdata\fR starts
with a \fB\-\fR.
.RE
.TP
\fBclipboard get\fR ?\fB\-displayof\fR \fIwindow\fR? ?\fB\-type\fR \fItype\fR?
.VS 8.4
Retrieve data from the clipboard on \fIwindow\fR's display.
\fIwindow\fR defaults to ".".  \fIType\fR specifies the form in which
the data is to be returned and should be an atom name such as STRING
or FILE_NAME.  \fIType\fR defaults to STRING.  This command is
equivalent to \fBselection get -selection CLIPBOARD\fR.
.VE 8.4
.SH EXAMPLES
Get the current contents of the clipboard.
.CS
if {[catch {\fBclipboard get\fR} contents]} {
    # There were no clipboard contents at all
}
.CE
.PP
Set the clipboard to contain a fixed string.
.CS
\fBclipboard clear\fR
\fBclipboard append\fR "some fixed string"
.CE

.SH "SEE ALSO"
selection(n)

.SH KEYWORDS
clear, format, clipboard, append, selection, type