hpux man page for xtselectioc

XtSelectionDoneProc()													     XtSelectionDoneProc()

Name
  XtSelectionDoneProc - interface definition for procedure called after selection transfer is completed.

Synopsis
  typedef void (*XtSelectionDoneProc)(Widget, Atom *, Atom *);
	 Widget w;
	 Atom *selection;
	 Atom *target;

Inputs
  w	    Specifies the widget that owns the converted selection.

  selection Specifies the atom that names the selection that was transferred.

  target    Specifies the target type to which the conversion was done.

Description
  An  XtSelectionDoneProc  is  optionally  registered  in a call to XtOwnSelection(), and is called by the Intrinsics after the corresponding
  XtConvertSelectionProc has been called and the data it returns is transferred to the requestor.

  An XtSelectionDoneProc should free the memory returned by the XtConvertSelectionProc and any other memory or resources  allocated  by  that
  procedure to convert the selection value.  If no XtSelectionDoneProc is registered with XtOwnSelection(), then the Intrinsics will automat-
  ically free the memory returned by the XtConvertSelectionProc by calling XtFree().

Usage
  Most XtConvertSelectionProc procedures will allocate a single block of memory with XtMalloc() and can simply rely on the Intrinsics to free
  that block with XtFree().  In this case, there is no need for an XtSelectionDoneProc.

  Note	that  an  XtSelectionDoneProc is not passed a client_data argument, nor is it passed a pointer to the memory that was returned by the
  XtConvertSelectionProc.  In a widget, the widget structure can point to the memory that must be freed, but  in  an  application,  you  will
  probably have to rely on a global variable, as in the example below.

  The XtSelectionDoneProc and XtOwnSelection() are part of the Intrinsics atomic selection transfer mechanism.	For some selection values, it
  may be more convenient to transfer the selection value in pieces.  This can be done with the incremental transfer mechanism;	see  XtOwnSe-
  lectionIncremental(1).

Example
  The  xcalc  client  uses  a  static  character string to store the selection value.  Because this is not allocated memory, it should not be
  freed, so xcalc provides a XtSelectionDoneProc which simply sets the static buffer to contain the empty string:

     static char selstr[LCD_STR_LEN]; /* storage for selections from the LCD */

     /*ARGSUSED*/
     void done(w, selection, target)
	 Widget      w;
	 Atom	     *selection;
	 Atom	     *target;
     {
	 selstr[0] = ' ';
     }

  This XtSelectionDoneProc is registered with this call:

	 XtOwnSelection(LCD, XA_PRIMARY, time, convert, lose, done);

See Also
  XtDisownSelection(1), XtGetSelectionValue(1), XtGetSelectionValues(1), XtOwnSelection(1), XtOwnSelectionIncremental(1),
  XtConvertSelectionProc(2).

Xt - Selections 													     XtSelectionDoneProc()