71  * children with special decorations, such as a highlighted title bar. The
  72  * active Window is always either the focused Window, or the first Frame or
  73  * Dialog that is an owner of the focused Window.
  74  * <p>
  75  * The KeyboardFocusManager is both a centralized location for client code to
  76  * query for the focus owner and initiate focus changes, and an event
  77  * dispatcher for all FocusEvents, WindowEvents related to focus, and
  78  * KeyEvents.
  79  * <p>
  80  * Some browsers partition applets in different code bases into separate
  81  * contexts, and establish walls between these contexts. In such a scenario,
  82  * there will be one KeyboardFocusManager per context. Other browsers place all
  83  * applets into the same context, implying that there will be only a single,
  84  * global KeyboardFocusManager for all applets. This behavior is
  85  * implementation-dependent. Consult your browser's documentation for more
  86  * information. No matter how many contexts there may be, however, there can
  87  * never be more than one focus owner, focused Window, or active Window, per
  88  * ClassLoader.
  89  * <p>
  90  * Please see
  91  * <a href="http://java.sun.com/docs/books/tutorial/uiswing/misc/focus.html">
  92  * How to Use the Focus Subsystem</a>,
  93  * a section in <em>The Java Tutorial</em>, and the
  94  * <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
  95  * for more information.
  96  *
  97  * @author David Mendenhall
  98  *
  99  * @see Window
 100  * @see Frame
 101  * @see Dialog
 102  * @see java.awt.event.FocusEvent
 103  * @see java.awt.event.WindowEvent
 104  * @see java.awt.event.KeyEvent
 105  * @since 1.4
 106  */
 107 public abstract class KeyboardFocusManager
 108     implements KeyEventDispatcher, KeyEventPostProcessor
 109 {
 110 
 111     // Shared focus engine logger

  71  * children with special decorations, such as a highlighted title bar. The
  72  * active Window is always either the focused Window, or the first Frame or
  73  * Dialog that is an owner of the focused Window.
  74  * <p>
  75  * The KeyboardFocusManager is both a centralized location for client code to
  76  * query for the focus owner and initiate focus changes, and an event
  77  * dispatcher for all FocusEvents, WindowEvents related to focus, and
  78  * KeyEvents.
  79  * <p>
  80  * Some browsers partition applets in different code bases into separate
  81  * contexts, and establish walls between these contexts. In such a scenario,
  82  * there will be one KeyboardFocusManager per context. Other browsers place all
  83  * applets into the same context, implying that there will be only a single,
  84  * global KeyboardFocusManager for all applets. This behavior is
  85  * implementation-dependent. Consult your browser's documentation for more
  86  * information. No matter how many contexts there may be, however, there can
  87  * never be more than one focus owner, focused Window, or active Window, per
  88  * ClassLoader.
  89  * <p>
  90  * Please see
  91  * <a href="http://docs.oracle.com/javase/tutorial/uiswing/misc/focus.html">
  92  * How to Use the Focus Subsystem</a>,
  93  * a section in <em>The Java Tutorial</em>, and the
  94  * <a href="../../java/awt/doc-files/FocusSpec.html">Focus Specification</a>
  95  * for more information.
  96  *
  97  * @author David Mendenhall
  98  *
  99  * @see Window
 100  * @see Frame
 101  * @see Dialog
 102  * @see java.awt.event.FocusEvent
 103  * @see java.awt.event.WindowEvent
 104  * @see java.awt.event.KeyEvent
 105  * @since 1.4
 106  */
 107 public abstract class KeyboardFocusManager
 108     implements KeyEventDispatcher, KeyEventPostProcessor
 109 {
 110 
 111     // Shared focus engine logger