MirBSD manpage: XtSetKeyboardFocus(3)

XtSetKeyboardFocus(3Xt)   XT FUNCTIONS    XtSetKeyboardFocus(3Xt)


     XtSetKeyboardFocus - focus events on a child widget


     XtSetKeyboardFocus(Widget subtree, Widget descendant);


     subtree   Specifies either the widget in the subtree struc-
               ture which is to receive the keyboard event, or
               None. Note that it is not an error to specify None
               when no input focus was previously set.

               Specifies the widget for which the keyboard focus
               is to be set.


     If a future KeyPress or KeyRelease event occurs within the
     specified subtree, XtSetKeyboardFocus causes XtDispatchEvent
     to remap and send the event to the specified descendant wid-

     When there is no modal cascade, keyboard events can occur
     within a widget W in one of three ways:

     +    W has the X input focus.

     +    W has the keyboard focus of one of its ancestors, and
          the event occurs within the ancestor or one of the
          ancestor's descendants.

     +    No ancestor of W has a descendant within the keyboard
          focus, and the pointer is within W.

     When there is a modal cascade, a widget W receives keyboard
     events if an ancestor of W is in the active subset of the
     modal cascade and one or more of the previous conditions is

     When subtree or one of its descendants acquires the X input
     focus or the pointer moves into the subtree such that key-
     board events would now be delivered to subtree, a FocusIn
     event is generated for the descendant if FocusNotify events
     have been selected by the descendant. Similarly, when W
     loses the X input focus or the keyboard focus for one of its
     ancestors, a FocusOut event is generated for descendant if
     FocusNotify events have been selected by the descendant.


     X Toolkit Intrinsics - C Language Interface
     Xlib - C Language X Interface

XFree86                   Version 4.5.0                         1

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