XSetInputFocus
NAME
XSetInputFocus, XGetInputFocus - control input focus
SYNTAX
int XSetInputFocus\^(\^Display *display\^, Window focus\^, int
revert_to\^, Time time\^);
int XGetInputFocus\^(\^Display *display\^, Window *focus_return\^,
int *revert_to_return\^);
ARGUMENTS
display
Specifies the connection to the X server.
focus
Specifies the window,
or
focus_return
Returns the focus window,
or
revert_to
Specifies where the input focus reverts to if the window becomes not
viewable.
You can pass
or
revert_to_return
Returns the current focus state
or
time
Specifies the time.
You can pass either a timestamp or
DESCRIPTION
The
function changes the input focus and the last-focus-change time.
It has no effect if the specified time is earlier than the current
last-focus-change time or is later than the current X server time.
Otherwise, the last-focus-change time is set to the specified time
is replaced by the current X server time).
causes the X server to generate
and
events.
Depending on the focus argument,
the following occurs:
If focus is
all keyboard events are discarded until a new focus window is set,
and the revert_to argument is ignored.
If focus is a window,
it becomes the keyboard's focus window.
If a generated keyboard event would normally be reported to this window
or one of its inferiors, the event is reported as usual.
Otherwise, the event is reported relative to the focus window.
If focus is
the focus window is dynamically taken to be the root window of whatever screen
the pointer is on at each keyboard event.
In this case, the revert_to argument is ignored.
The specified focus window must be viewable at the time
is called,
or a
error results.
If the focus window later becomes not viewable,
the X server
evaluates the revert_to argument to determine the new focus window as follows:
If revert_to is
the focus reverts to the parent (or the closest viewable ancestor),
and the new revert_to value is taken to be
If revert_to is
or
the focus reverts to
or
respectively.
When the focus reverts,
the X server generates
and
events, but the last-focus-change time is not affected.
can generate
and
errors.
The
function returns the focus window and the current focus state.
DIAGNOSTICS
Some numeric value falls outside the range of values accepted by the request.
Unless a specific range is specified for an argument, the full range defined
by the argument's type is accepted. Any argument defined as a set of
alternatives can generate this error.
A value for a Window argument does not name a defined Window.
SEE ALSO
XWarpPointer(3X11)
