Provided by: libxt-dev_1.1.5-1_amd64 bug


       XtSetKeyboardFocus - focus events on a child widget


       XtSetKeyboardFocus(Widget subtree, Widget descendant);


       subtree   Specifies either the widget in the subtree structure 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 widget.

       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 keyboard 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