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XtCreateSelectionRequest(3Xt)
X11R6
NAME
XtCreateSelectionRequest, XtSendSelectionRequest, XtCancelSelectionRequest
- bundle multiple selection conversion requests into a single request using
MULTIPLE target
SYNOPSIS
void XtCreateSelectionRequest(requestor, selection)
Widget requestor;
Atom selection;
void XtSendSelectionRequest(requestor, selection, time)
Widget requestor;
Atom selection;
Time time;
void XtCancelSelectionRequest(requestor, selection)
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
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