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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 pre-viously previously
viously 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:
• 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 True.
When subtree or one of its descendants acquires the X input focus or the pointer moves into the sub-tree subtree
tree 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(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
X Version 11 libXt 1.0.5 XtSetKeyboardFocus(3)
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