XSetSelectionOwner, XGetSelectionOwner, XConvertSelection - manipulate
int XSetSelectionOwner(Display *display, Atom selection, Window owner,
Window XGetSelectionOwner(Display *display, Atom selection);
int XConvertSelection(Display *display, Atom selection, Atom target,
Atom property, Window requestor, Time time);
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
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
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
uninterpreted by the X server. XGetSelectionOwner returns the owner
window, which is reported in SelectionRequest and SelectionClear
events. Selections 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
SelectionRequest event to that owner.
· If no owner for the specified selection exists, the X server
generates a SelectionNotify event to the requestor with property
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.
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 Window.
Xlib - C Language X Interface