XSetSelectionOwner(XS) X Version 11 (Release 5) XSetSelectionOwner(XS)
6 January 1993
Name
XSetSelectionOwner - manipulate window selection
Syntax
XSetSelectionOwner(display, selection, owner, time)
Display *display;
Atom selection;
Window owner;
Time time;
Window XGetSelectionOwner(display, selection)
Display *display;
Atom selection;
XConvertSelection(display, selection, target, property, requestor, time)
Display *display;
Atom selection, target;
Atom property;
Window requestor;
Time time;
Arguments
display Specifies the connection to the X server.
owner Specifies the owner of the specified selection atom. You can
pass a window or None.
property Specifies the property name. You also can pass None.
requestor Specifies the requestor.
selection Specifies the selection atom.
target Specifies the target atom.
time Specifies the time. You can pass either a timestamp or
CurrentTime.
Description
The XSetSelectionOwner function changes the owner and last-change time
for the specified selection and has no effect if the specified time is
earlier than the current last-change time of the specified selection or
is later than the current X server time. Otherwise, the last-change time
is set to the specified time, with CurrentTime replaced by the current
server time. If the owner window is specified as None, then the owner of
the selection becomes None (that is, no owner). Otherwise, the owner of
the selection becomes the client executing the request.
If the new owner (whether a client or None) is not the same as the
current owner of the selection and the current owner is not None, the
current owner is sent a SelectionClear event. If the client that is the
owner of a selection is later terminated (that is, its connection is
closed) or if the owner window it has specified in the request is later
destroyed, the owner of the selection automatically reverts to None, but
the last-change time is not affected. The selection atom is uninter-
preted by the X server. XGetSelectionOwner returns the owner window,
which is reported in SelectionRequest and SelectionClear events. Selec-
tions are global to the X server.
XSetSelectionOwner can generate ``BadAtom'' and ``BadWindow'' errors.
The XGetSelectionOwner function returns the window ID associated with the
window that currently owns the specified selection. If no selection was
specified, the function returns the constant None. If None is returned,
there is no owner for the selection.
XGetSelectionOwner can generate a ``BadAtom'' error.
XConvertSelection requests that the specified selection be converted to
the specified target type:
+ If the specified selection has an owner, the X server sends a Selec-
tionRequest event to that owner.
+ If no owner for the specified selection exists, the X server generates
a SelectionNotify event to the requestor with property None.
The arguments are passed on unchanged in either of the events. There are
two predefined selection atoms: PRIMARY and SECONDARY.
XConvertSelection can generate ``BadAtom'' and ``BadWindow'' errors.
Diagnostics
``BadAtom'' A value for an Atom argument does not name a defined Atom.
``BadWindow'' A value for a Window argument does not name a defined Win-
dow.
See also
Xlib - C Language X Interface