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src/java.desktop/share/classes/java/awt/event/HierarchyListener.java

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  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt.event;
  27 
  28 import java.util.EventListener;
  29 
  30 /**
  31  * The listener interface for receiving hierarchy changed events.
  32  * The class that is interested in processing a hierarchy changed event
  33  * should implement this interface.
  34  * The listener object created from that class is then registered with a
  35  * Component using the Component's <code>addHierarchyListener</code>
  36  * method. When the hierarchy to which the Component belongs changes, the
  37  * <code>hierarchyChanged</code> method in the listener object is invoked,
  38  * and the <code>HierarchyEvent</code> is passed to it.
  39  * <p>
  40  * Hierarchy events are provided for notification purposes ONLY;
  41  * The AWT will automatically handle changes to the hierarchy internally so
  42  * that GUI layout, displayability, and visibility work properly regardless
  43  * of whether a program registers a <code>HierarchyListener</code> or not.
  44  *
  45  * @author      David Mendenhall
  46  * @see         HierarchyEvent
  47  * @since       1.3
  48  */
  49 public interface HierarchyListener extends EventListener {
  50     /**
  51      * Called when the hierarchy has been changed. To discern the actual
  52      * type of change, call <code>HierarchyEvent.getChangeFlags()</code>.
  53      *
  54      * @param e the event to be processed
  55      * @see HierarchyEvent#getChangeFlags()
  56      */
  57     public void hierarchyChanged(HierarchyEvent e);
  58 }


  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt.event;
  27 
  28 import java.util.EventListener;
  29 
  30 /**
  31  * The listener interface for receiving hierarchy changed events.
  32  * The class that is interested in processing a hierarchy changed event
  33  * should implement this interface.
  34  * The listener object created from that class is then registered with a
  35  * Component using the Component's {@code addHierarchyListener}
  36  * method. When the hierarchy to which the Component belongs changes, the
  37  * {@code hierarchyChanged} method in the listener object is invoked,
  38  * and the {@code HierarchyEvent} is passed to it.
  39  * <p>
  40  * Hierarchy events are provided for notification purposes ONLY;
  41  * The AWT will automatically handle changes to the hierarchy internally so
  42  * that GUI layout, displayability, and visibility work properly regardless
  43  * of whether a program registers a {@code HierarchyListener} or not.
  44  *
  45  * @author      David Mendenhall
  46  * @see         HierarchyEvent
  47  * @since       1.3
  48  */
  49 public interface HierarchyListener extends EventListener {
  50     /**
  51      * Called when the hierarchy has been changed. To discern the actual
  52      * type of change, call {@code HierarchyEvent.getChangeFlags()}.
  53      *
  54      * @param e the event to be processed
  55      * @see HierarchyEvent#getChangeFlags()
  56      */
  57     public void hierarchyChanged(HierarchyEvent e);
  58 }
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