NAME
XtGetSelectionValueIncremental, XtGetSelectionValuesIncremental - obtain
selection values
SYNTAX
void
XtGetSelectionValueIncremental(Widget w, Atom selection, Atom
target, XtSelectionCallbackProc callback, XtPointer
client_data, Time time);
void
XtGetSelectionValuesIncremental(Widget w, Atom selection, Atom *
targets, int count, XtSelectionCallbackProc callback,
XtPointer client_data, Time time);
ARGUMENTS
- callback
- Specifies the callback procedure that is to be called
when the selection value has been obtained.
- client_data
- Specifies the argument that is to be passed to the
specified procedure when it is called.
- client_data
- Specifies the client data (one for each target type) that
is passed to the callback procedure when it is called for that
target.
- count
- Specifies the length of the targets and client_data
lists.
- selection
- Specifies the particular selection desired (that is,
primary or secondary).
- target
- Specifies the type of the information that is needed about
the selection.
- targets
- Specifies the types of information that is needed about the
selection.
- time
- Specifies the timestamp that indicates when the selection
value is desired.
- w
- Specifies the widget that is making the request.
DESCRIPTION
The
XtGetSelectionValueIncremental function is similar to
XtGetSelectionValue except that the
selection_callback procedure
will be called repeatedly upon delivery of multiple segments of the selection
value. The end of the selection value is indicated when
selection_callback is called with a non-NULL value of length zero,
which must still be freed by the client. If the transfer of the selection is
aborted in the middle of a transfer (for example, because to timeout), the
selection_callback procedure is called with a type value equal to the
symbolic constant
XT_CONVERT_FAIL so that the requestor can dispose of
the partial selection value it has collected up until that point. Upon
receiving
XT_CONVERT_FAIL, the requesting client must determine for
itself whether or not a partially completed transfer is meaningful.
The
XtGetSelectionValuesIncremental function is similar to
XtGetSelectionValueIncremental except that it takes a list of target
types and a list of client data and obtains the current value of the selection
converted to each of the targets. The effect is as if each target were
specified in a separate call to
XtGetSelectionValueIncremental. The
callback is called once with the corresponding client data for each target.
XtGetSelectionValuesIncremental does guarantee that all the conversions
will use the same selection value because the ownership of the selection
cannot change in the middle of the list, as would be when calling
XtGetSelectionValueIncremental repeatedly.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface