xigetfocus(3) [debian man page]

XISETFOCUS(3)															     XISETFOCUS(3)

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.

								    05/15/2013							     XISETFOCUS(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)