XtSetKeyboardFocus(3) XT FUNCTIONS XtSetKeyboardFocus(3)

NAME

XtSetKeyboardFocus - focus events on a child widget

SYNTAX

XtSetKeyboardFocus(Widget subtree, Widget descendant);

ARGUMENTS

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.

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

DESCRIPTION

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:

+o W has the X input focus.

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

+o 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 True.

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.

SEE ALSO

XtCallAcceptFocus(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface

X Version 11 libXt 1.1.5 XtSetKeyboardFocus(3)