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X Version 11 (Release 5)

XSetInputFocus(XS)


XSetInputFocus -- control input focus

Syntax

   XSetInputFocus(display, focus, revert_to, time)
         Display *display;
         Window focus;
         int revert_to;
         Time time;
   

XGetInputFocus(display, focus_return, revert_to_return) Display *display; Window *focus_return; int *revert_to_return;

Arguments


display
Specifies the connection to the X server.

focus
Specifies the window, PointerRoot, or None.

focus_return
Returns the focus window, PointerRoot, or None.

revert_to
Specifies where the input focus reverts to if the window becomes not viewable. You can pass RevertToParent, RevertToPointerRoot, or RevertToNone.

revert_to_return
Returns the current focus state (RevertToParent, RevertToPointerRoot, or RevertToNone).

time
Specifies the time. You can pass either a timestamp or CurrentTime.

Description

The XSetInputFocus 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 (CurrentTime is replaced by the current X server time). XSetInputFocus causes the X server to generate FocusIn and FocusOut events.

Depending on the focus argument, the following occurs:

The specified focus window must be viewable at the time XSetInputFocus is called, or a ``BadMatch'' 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: XSetInputFocus can generate ``BadMatch'', ``BadValue'', and ``BadWindow'' errors.

The XGetInputFocus function returns the focus window and the current focus state.

Diagnostics


``BadValue''
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.

``BadWindow''
A value for a Window argument does not name a defined Window.

See also

XWarpPointer(XS)
Xlib - C Language X Interface
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003