XISETFOCUS
XISETFOCUS
NAMESYNOPSIS
DESCRIPTION
DIAGNOSTICS
NAME
XISetFocus, XIGetFocus − set or get the device´s focus.
SYNOPSIS
#include <X11/extensions/XInput2.h>
Status
XISetFocus( Display *display,
int deviceid,
Window focus,
Time time);
Status
XIGetFocus( Display *display,
Window *focus_return);
display
Specifies the connection to the X server.
deviceid
Specifies the device whose focus is to be queried or
changed.
focus
The new focus window.
focus_return
Returns the current focus window.
time
A valid timestamp or CurrentTime.
DESCRIPTION
XISetFocus
changes the focus of the specified device ans its
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.
CurrentTime is replaced by the current X server time).
XISetFocus causes the X server to generate core, XI and XI2
focus events.
If the focus
window is None all keyboard events by this device
are discarded until a new focus window is set. Otherwise, if
focus is a window, it becomes the device´s focus
window. If a
generated device 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.
The specified
focus window must be viewable at the time
XISetFocus is called, or a BadMatch error results. If the
focus
window later becomes not viewable, the focus reverts to the
parent (or the closest viewable ancestor. When the focus
reverts, the X server generates core, XI and XI2 focus
events
but the last−focus−change time is not
affected.
Attempting to
set the focus on a master pointer device or an
attached slave device will result in a BadDevice error.
XISetFocus can
generate BadDevice, BadMatch, BadValue, and
BadWindow errors.
DIAGNOSTICS
BadValue
A value is outside of the permitted range.
BadDevice
An invalid device was specified. The device does not
exist or is not a appropriate for the type of change.
BadMatch
The window is not viewable.
BadWindow
A value for a Window argument does not name a defined
Window.
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