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xisetfocus(3) [centos 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. 03/09/2013 XISETFOCUS(3)

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XSetInputFocus(3)						  XLIB FUNCTIONS						 XSetInputFocus(3)

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, 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 speci- fied 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: o If focus is None, 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 PointerRoot, the focus window is dynamically taken to be the root window of whatever screen the pointer is on at each key- board event. In this case, the revert_to argument is ignored. 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: o If revert_to is RevertToParent, the focus reverts to the parent (or the closest viewable ancestor), and the new revert_to value is taken to be RevertToNone. o If revert_to is RevertToPointerRoot or RevertToNone, the focus reverts to PointerRoot or None, respectively. When the focus reverts, the X server generates FocusIn and FocusOut events, but the last-focus-change time is not affected. 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 argu- ment, 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(3) Xlib - C Language X Interface X Version 11 libX11 1.6.0 XSetInputFocus(3)
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