XLIB Programming Manual, Rel. 5, Third Edition

Name

FocusIn,FocusOut — xfocus

When Generated

FocusIn and FocusOut events occur when the keyboard focus window changes as a result of an XSetInputFocus() call. They are much like EnterNotify and LeaveNotify events except that they track the focus rather than the pointer.

When a focus change occurs, a FocusOut event is delivered to the old focus window and a FocusIn event to the window which receives the focus. In addition, windows in between these two windows in the window hierarchy are virtually crossed and receive focus change events, as described below. Some or all of the windows between the window containing the pointer at the time of the focus change and the root window also receive focus change events, as described below.

Select With

FocusIn and FocusOut events are selected with FocusChangeMask. They cannot be selected separately.

XEvent Structure Name

typedef union _XEvent {
    ...
    XFocusChangeEvent xfocus;
    ...
} XEvent;

Event Structure

typedef struct { int type; /* FocusIn or FocusOut */ unsigned long serial; /* # of last request processed by server */ Bool send_event; /* True if this came from SendEvent request */ Display *display; /* Display the event was read from */ Window window; /* Window of event */ int mode; /* NotifyNormal, NotifyGrab, NotifyUngrab */ int detail; /* NotifyAncestor, NotifyDetailNone, * NotifyInferior, NotifyNonLinear, * NotifyNonLinearVirtual, NotifyPointer, * NotifyPointerRoot, NotifyVirtual */ } XFocusChangeEvent; typedef XFocusChangeEvent XFocusInEvent; typedef ...