NAME
XtCreateSelectionRequest, XtSendSelectionRequest,
XtCancelSelectionRequest - bundle multiple selection conversion
requests into a single request using MULTIPLE target
SYNTAX
void XtCreateSelectionRequest(Widget requestor, Atom selection):
void XtSendSelectionRequest(Widget requestor, Atom selection, Time
time);
void XtCancelSelectionRequest(Widget requestor, Atom selection);
ARGUMENTS
requestor Specifies the widget making the request. Must be of class
Core or a subclass thereof.
selection Specifies the particular selection desired.
time Specifies the timestamp to be used in making the request.
DESCRIPTION
When XtCreateSelectionRequest is called, subsequent calls to
XtGetSelectionValue and XtGetSelectionValueIncremental with the
requestor and selection as specified to XtCreateSelectionRequest will
be bundled into a single selection conversion request with multiple
targets. The request is actually initiated by calling
XtSendSelectionRequest.
When XtSendSelectionRequest is called with a value of requestor and
selection matching a previous call to XtCreateSelectionRequest, a
selection conversion request is actually sent to the selection owner.
If a single target request is queued, that request is made. If multiple
targets are queued they are bundled into a single request with the
target MULTIPLE using the specified timestamp. As the conversions are
made, the callbacks associated with each XtGetSelectionValue and
XtGetSelectionValueIncremental are invoked in turn.
Multi-threaded applications should lock the application context before
calling XtCreateSelectionRequest and release the lock after calling
XtSendSelectionRequest to ensure that the thread assembling the request
is safe from interference by another thread assembling a different
request naming the same widget and selection.
When XtCancelSelectionRequest is called, any requests queued since the
last call to XtCreateSelectionRequest are cleaned up. Subsequent calls
to XtGetSelectionValue, XtGetSelectionValues,
XtGetSelectionValueIncremental, and XtGetSelectionValuesIncremental
will not be deferred.
SEE ALSO
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface