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XtGetSelectionValueIncremental(3)


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



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