Tk_ClipboardClear(3) Tk Library Procedures Tk_ClipboardClear(3)
Tk_ClipboardClear, Tk_ClipboardAppend - Manage the clipboard
Tk_ClipboardAppend(interp, tkwin, target, format, buffer)
Tcl_Interp *interp (in) Interpreter to use for reporting errors.
Tk_Window tkwin (in) Window that determines which display's clipboard to
Atom target (in) Conversion type for this clipboard item; has same
meaning as target argument to Tk_CreateSelHandler.
Atom format (in) Representation to use when data is retrieved; has
same meaning as format argument to Tk_CreateSelHan-
char *buffer (in) Null terminated string containing the data to be
appended to the clipboard.
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
Tk_ClipboardClear claims the CLIPBOARD selection and frees any data items previously
stored on the clipboard in this application. It normally returns TCL_OK, but if an error
occurs it returns TCL_ERROR and leaves an error message in interp->result. Tk_Clipboard-
Clear 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 tar-
get must have the same format or an error will be returned. Tk_ClipboardAppend returns
TCL_OK if the buffer 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_Clipboard-
Clear, 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 ownership 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_ClipboardClear is invoked.
append, clipboard, clear, format, type
Tk 4.0 Tk_ClipboardClear(3)