Tk_ClipboardClear(3) Tk Library Procedures Tk_ClipboardClear(3)______________________________________________________________________________NAME
Tk_ClipboardClear, Tk_ClipboardAppend - Manage the clipboard
SYNOPSIS
#include <tk.h>
int
Tk_ClipboardClear(interp, tkwin)
int
Tk_ClipboardAppend(interp, tkwin, target, format, buffer)
ARGUMENTS
Tcl_Interp *interp (in) Interpreter to use for reporting
errors.
Tk_Window tkwin (in) Window that determines which dis‐
play's clipboard to manipulate.
Atom target (in) Conversion type for this clip‐
board item; has same meaning as
target argument to Tk_CreateSel‐
Handler.
Atom format (in) Representation to use when data
is retrieved; has same meaning
as format argument to Tk_Create‐
SelHandler.
char *buffer (in) Null terminated string containing
the data to be appended to the
clipboard.
_________________________________________________________________DESCRIPTION
These two procedures manage the clipboard for Tk. The clipboard is
typically managed by calling Tk_ClipboardClear once, then calling
Tk_ClipboardAppend to add data for any number of targets.
Tk_ClipboardClear claims the CLIPBOARD selection and frees any data
items previously stored on the clipboard in this application. It nor‐
mally returns TCL_OK, but if an error occurs it returns TCL_ERROR and
leaves an error message in interp->result. Tk_ClipboardClear must be
called before a sequence of Tk_ClipboardAppend calls can be issued.
Tk_ClipboardAppend appends a buffer of data to the clipboard. The
first buffer for a given target determines the format for that target.
Any successive appends for that target must have the same format or an
error will be returned. Tk_ClipboardAppend returns TCL_OK if the buf‐
fer is successfully copied onto the clipboard. If the clipboard is not
currently owned by the application, either because Tk_ClipboardClear
has not been called or because ownership of the clipboard has changed
since the last call to Tk_ClipboardClear, Tk_ClipboardAppend returns
TCL_ERROR and leaves an error message in interp->result.
In order to guarantee atomicity, no event handling should occur between
Tk_ClipboardClear and the following Tk_ClipboardAppend calls (otherwise
someone could retrieve a partially completed clipboard or claim owner‐
ship away from this application).
Tk_ClipboardClear may invoke callbacks, including arbitrary Tcl
scripts, as a result of losing the CLIPBOARD selection, so any calling
function should take care to be reentrant at the point Tk_Clipboard‐
Clear is invoked.
KEYWORDS
append, clipboard, clear, format, type
Tk 4.0 Tk_ClipboardClear(3)
