xtloseseleb(3) [hpux man page]

XtLoseSelectionProc()													     XtLoseSelectionProc()

Name
  XtLoseSelectionProc - interface definition for procedure to notify the selection owner it has lost selection ownership.

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

Inputs
  w	    Specifies the widget that has lost selection ownership.

  selection Specifies the atom that names the selection.

Description
  An XtLoseSelectionProc is optionally registered in a call to XtOwnSelection() and is called by the Intrinsics when the widget it was regis-
  tered with loses the selection because another widget or client has claimed the selection.  It is  not  called  when	the  selection	owner
  relinquishes	selection  ownership  with  XtDisownSelection().  This procedure should take whatever action is appropriate for the widget or
  application when it loses selection ownership.

  Note that this procedure is not a request to the widget to relinquish selection ownership; it is called after the widget has	already  lost
  the selection.

Usage
  Most selection owners (widgets or applications) will want to display selected data highlighted in some way, and so will need to be informed
  when they lose the selection so that they can unhighlight that data.

  An XtLoseSelectionIncrProc is a similar procedure type used by the Intrinsics incremental selection transfer mechanism.  It takes an	addi-
  tional client_data argument.

Example
  The XtLoseSelectionProc below is from the xcalc client.  It simply unhighlights the value currently shown in the calculator display.

     /*
      * called when xcalc loses ownership of the selection.
      */
     /*ARGSUSED*/
     void lose(w, selection)
	 Widget      w;
	 Atom	     *selection;
     {
	 XawToggleUnsetCurrent(LCD);
     }

See Also
  XtDisownSelection(1), XtGetSelectionValue(1), XtGetSelectionValueIncremental(1), XtOwnSelection(1),
  XtLoseSelectionIncrProc(2).

Xt - Selections 													     XtLoseSelectionProc()

XtOwnSelection(3)						   XT FUNCTIONS 						 XtOwnSelection(3)

NAME

       XtOwnSelection, XtOwnSelectionIncremental, XtDisownSelection - set selection owner

SYNTAX

       Boolean XtOwnSelection(Widget w, Atom selection, Time time, XtConvertSelectionProc convert_proc, XtLoseSelectionProc lose_selection, XtSe-
	      lectionDoneProc done_proc);

       Boolean XtOwnSelectionIncremental(Widget w, Atom selection, Time time, XtConvertSelectionIncrProc convert_callback, XtLoseSelectionIncrProc
	      lose_callback, XtSelectionDoneIncrProc done_callback, XtCancelConvertSelectionProc cancel_callback, XtPointer client_data);

       void XtDisownSelection(Widget w, Atom selection, Time time);

ARGUMENTS

       convert_proc
		 Specifies the procedure that is to be called whenever someone requests the current value of the selection.

       done_proc Specifies the procedure that is called after the requestor has received the selection or NULL if the owner is not interested in
		 being called back.

       lose_selection
		 Specifies the procedure that is to be called whenever the widget has lost selection ownership or NULL if the owner is not inter-
		 ested in being called back.

       selection Specifies an atom that describes the type of the selection (for example, XA_PRIMARY, XA_SECONDARY, or XA_CLIPBOARD).

       time	 Specifies the timestamp that indicates when the selection ownership should commence or is to be relinquished.

       w	 Specifies the widget that wishes to become the owner or to relinquish ownership.

DESCRIPTION

       The XtOwnSelection function informs the Intrinsics selection mechanism that a widget believes it owns a selection.  It returns True if the
       widget has successfully become the owner and False otherwise.  The widget may fail to become the owner if some other widget has asserted
       ownership at a time later than this widget.  Note that widgets can lose selection ownership either because someone else asserted later own-
       ership of the selection or because the widget voluntarily gave up ownership of the selection.  Also note that the lose_selection procedure
       is not called if the widget fails to obtain selection ownership in the first place.

       The XtOwnSelectionIncremental procedure informs the Intrinsics incremental selection mechanism that the specified widget wishes to own the
       selection. It returns True if the specified widget successfully becomes the selection owner or False otherwise. For more information about
       selection, target, and time, see Section 2.6 of the Inter-Client Communication Conventions Manual.

       A widget that becomes the selection owner using XtOwnSelectionIncremental may use XtDisownSelection to relinquish selection ownership.

       The XtDisownSelection function informs the Intrinsics selection mechanism that the specified widget is to lose ownership of the selection.
       If the widget does not currently own the selection either because it lost the selection or because it never had the selection to begin
       with, XtDisownSelection does nothing.

       After a widget has called XtDisownSelection, its convert procedure is not called even if a request arrives later with a timestamp during
       the period that this widget owned the selection.  However, its done procedure will be called if a conversion that started before the call
       to XtDisownSelection finishes after the call to XtDisownSelection.

SEE ALSO

       XtAppGetSelectionTimeout(3), XtGetSelectionValue(3)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

X Version 11							    libXt 1.1.4 						 XtOwnSelection(3)