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markom |
'\"
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'\" Copyright (c) 1994 The Regents of the University of California.
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'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" RCS: @(#) $Id: Clipboard.3,v 1.1.1.1 2002-01-16 10:25:48 markom Exp $
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'\"
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.so man.macros
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.TH Tk_ClipboardClear 3 4.0 Tk "Tk Library Procedures"
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.BS
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.SH NAME
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Tk_ClipboardClear, Tk_ClipboardAppend \- Manage the clipboard
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.SH SYNOPSIS
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.nf
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\fB#include \fR
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.sp
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int
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\fBTk_ClipboardClear\fR(\fIinterp, tkwin\fR)
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.sp
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int
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\fBTk_ClipboardAppend\fR(\fIinterp, tkwin, target, format, buffer\fR)
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.SH ARGUMENTS
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.AS Tk_ClipboardClear tkwin
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.AP Tcl_Interp *interp in
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Interpreter to use for reporting errors.
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.AP Tk_Window tkwin in
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Window that determines which display's clipboard to manipulate.
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.AP Atom target in
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Conversion type for this clipboard item; has same meaning as
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\fItarget\fR argument to \fBTk_CreateSelHandler\fR.
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.AP Atom format in
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Representation to use when data is retrieved; has same meaning as
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\fIformat\fR argument to \fBTk_CreateSelHandler\fR.
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.AP char *buffer in
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Null terminated string containing the data to be appended to the clipboard.
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.BE
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.SH DESCRIPTION
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.PP
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These two procedures manage the clipboard for Tk.
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The clipboard is typically managed by calling \fBTk_ClipboardClear\fR
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once, then calling \fBTk_ClipboardAppend\fR to add data for any
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number of targets.
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.PP
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\fBTk_ClipboardClear\fR claims the CLIPBOARD selection and frees any
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data items previously stored on the clipboard in this application.
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It normally returns TCL_OK, but if an error occurs it returns
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TCL_ERROR and leaves an error message in \fIinterp->result\fR.
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\fBTk_ClipboardClear\fR must be called before a sequence of
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\fBTk_ClipboardAppend\fR calls can be issued.
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.PP
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\fBTk_ClipboardAppend\fR appends a buffer of data to the clipboard.
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The first buffer for a given \fItarget\fR determines the \fIformat\fR
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for that \fItarget\fR.
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Any successive appends for that \fItarget\fR must have
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the same format or an error will be returned.
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\fBTk_ClipboardAppend\fR returns TCL_OK if the buffer is
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successfully copied onto the clipboard. If the clipboard is not
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currently owned by the application, either
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because \fBTk_ClipboardClear\fR has not been called or because
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ownership of the clipboard has changed since the last call to
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\fBTk_ClipboardClear\fR,
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\fBTk_ClipboardAppend\fR returns TCL_ERROR and leaves an error message in
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\fIinterp->result\fR.
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.PP
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In order to guarantee atomicity, no event handling should occur
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between \fBTk_ClipboardClear\fR and the following
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\fBTk_ClipboardAppend\fR calls (otherwise someone could retrieve
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a partially completed clipboard or claim ownership away from
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this application).
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.PP
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\fBTk_ClipboardClear\fR may invoke callbacks, including arbitrary
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Tcl scripts, as a result of losing the CLIPBOARD selection, so
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any calling function should take care to be reentrant at the point
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\fBTk_ClipboardClear\fR is invoked.
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.SH KEYWORDS
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append, clipboard, clear, format, type
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