Интерактивная система просмотра системных руководств (man-ов)
XtOwnSelection (3)
>> XtOwnSelection (3) ( Разные man: Библиотечные вызовы )
NAME
XtOwnSelection, XtOwnSelectionIncremental, XtDisownSelection - set selection owner
SYNTAX
Boolean XtOwnSelection(Widget w, Atom selection, Time time,
XtConvertSelectionProc convert_proc, XtLoseSelectionProc
lose_selection, XtSelectionDoneProc 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 interested 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 ownership 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.
