xcb_set_input_focus_checked(3) [centos man page]

xcb_set_input_focus(3)						   XCB Requests 					    xcb_set_input_focus(3)

NAME

       xcb_set_input_focus - Sets input focus

SYNOPSIS

       #include <xcb/xproto.h>

   Request function
       xcb_void_cookie_t xcb_set_input_focus(xcb_connection_t *conn, uint8_t revert_to, xcb_window_t focus, xcb_timestamp_t time);

REQUEST ARGUMENTS

       conn	 The XCB connection to X11.

       revert_to One of the following values:

		 XCB_INPUT_FOCUS_NONE
			   The focus reverts to XCB_NONE, so no window will have the input focus.

		 XCB_INPUT_FOCUS_POINTER_ROOT
			   The focus reverts to XCB_POINTER_ROOT respectively. When the focus reverts, FocusIn and FocusOut events are generated,
			   but the last-focus-change time is not changed.

		 XCB_INPUT_FOCUS_PARENT
			   The focus reverts to the parent (or closest viewable ancestor) and the new revert_to value is XCB_INPUT_FOCUS_NONE.

		 XCB_INPUT_FOCUS_FOLLOW_KEYBOARD
			   NOT YET DOCUMENTED. Only relevant for the xinput extension.

		 Specifies what happens when the focus window becomes unviewable (if focus is neither XCB_NONE nor XCB_POINTER_ROOT).

       focus	 The window to focus. All keyboard events will be reported to this window. The window must be viewable (TODO), or a xcb_match_er-
		 ror_t occurs (TODO).

		 If focus is XCB_NONE (TODO), all keyboard events are discarded until a new focus window is set.

		 If focus is XCB_POINTER_ROOT (TODO), focus is on the root window of the screen on which the pointer is on currently.

       time	 Timestamp to avoid race conditions when running X over the network.

		 The special value XCB_CURRENT_TIME will be replaced with the current server time.

DESCRIPTION

       Changes the input focus and the last-focus-change time. If the specified time is earlier than the current last-focus-change time, the re-
       quest is ignored (to avoid race conditions when running X over the network).

       A FocusIn and FocusOut event is generated when focus is changed.

RETURN VALUE

       Returns an xcb_void_cookie_t. Errors (if any) have to be handled in the event loop.

       If you want to handle errors directly with xcb_request_check instead, use xcb_set_input_focus_checked. See xcb-requests(3) for details.

ERRORS

       xcb_window_error_t
		 The specified focus window does not exist.

       xcb_value_error_t
		 TODO: Reasons?

       xcb_match_error_t
		 The specified focus window is not viewable.

SEE ALSO

       xcb-requests(3), xcb_focus_in_event_t(3), xcb_focus_out_event_t(3)

AUTHOR

       Generated from xproto.xml. Contact xcb@lists.freedesktop.org for corrections and improvements.

XCB
								    2014-06-10						    xcb_set_input_focus(3)

XSetInputFocus(3X11)						     MIT X11R4						      XSetInputFocus(3X11)

Name
       XSetInputFocus, XGetInputFocus - 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, 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:

       o    If focus is all keyboard events are discarded until a new focus window is set, and the revert_to argument is ignored.

       o    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.

       o    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:

       o    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

       o    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)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

															      XSetInputFocus(3X11)