NAME
XSetSelectionOwner, XGetSelectionOwner, XConvertSelection - manipulate window
selection
SYNTAX
int
XSetSelectionOwner(Display * display, Atom selection, Window
owner, Time time);
Window
XGetSelectionOwner(Display * display, Atom selection);
int
XConvertSelection(Display * display, Atom selection, Atom
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 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 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
Window.
SEE ALSO
Xlib - C Language X Interface