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