XtOwnSelection(3Xt) XT FUNCTIONS XtOwnSelection(3Xt)NAME
XtOwnSelection, XtOwnSelectionIncremental, XtDisown-
Selection - set selection owner
SYNTAX
Boolean XtOwnSelection(w, selection, time, convert_proc,
lose_selection, done_proc)
Widget w;
Atom selection;
Time time;
XtConvertSelectionProc convert_proc;
XtLoseSelectionProc lose_selection;
XtSelectionDoneProc done_proc;
Boolean XtOwnSelectionIncremental(w, selection, time, con-
vert_callback, lose_callback, done_callback, cancel_call-
back, client_data)
Widget w;
Atom selection;
Time time;
XtConvertSelectionIncrProc convert_callback;
XtLoseSelectionIncrProc lose_callback;
XtSelectionDoneIncrProc done_callback;
XtCancelConvertSelectionProc cancel_callback;
XtPointer client_data;
void XtDisownSelection(w, selection, time)
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
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XtOwnSelection(3Xt) XT FUNCTIONS XtOwnSelection(3Xt)
relinquished.
w Specifies the widget that wishes to become the
owner or to relinquish ownership.
DESCRIPTION
The XtOwnSelection function informs the Intrinsics selec-
tion 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 XtOwnSelectionInrcremental procedure informs the
Intrinsics incremental selection mechanism that the speci-
fied 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 XtOwn-
SelectionIncremental may use XtDisownSelection to relin-
quish 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 cur-
rently own the selection either because it lost the selec-
tion 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 XtDisown-
Selection finishes after the call to XtDisownSelection.
SEE ALSOXtAppGetSelectionTimeout(3Xt), XtGetSelectionValue(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 Release 6.4 2
