Examples of java.awt.event.HierarchyListener

java.awt.event.HierarchyListener
The listener interface for receiving hierarchy changed events. The class that is interested in processing a hierarchy changed event should implement this interface. The listener object created from that class is then registered with a Component using the Component's addHierarchyListener method. When the hierarchy to which the Component belongs changes, the hierarchyChanged method in the listener object is invoked, and the HierarchyEvent is passed to it.
Hierarchy events are provided for notification purposes ONLY; The AWT will automatically handle changes to the hierarchy internally so that GUI layout, displayability, and visibility work properly regardless of whether a program registers a HierarchyListener or not. @author David Mendenhall @see HierarchyEvent @since 1.3

        }
        frame.addPropertyChangeListener(propertyChangeListener);


        // propertyChangeListener will be uninstalled
        // when title pane is removed from internal frame
        addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(final HierarchyEvent e) {
                if (e.getChanged() == BasicInternalFrameTitlePane.this
                        && (e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED) != 0
                        && !frame.isAncestorOf(BasicInternalFrameTitlePane.this)) {
                    uninstallListeners();

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            public void actionPerformed(final ActionEvent e) {
                approveButton.getAction().actionPerformed(e);
            }
        });


        fc.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(final HierarchyEvent e) {
                if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0
                    && fc.isShowing()) {
                    fileNameField.requestFocus();
                    fileNameField.selectAll();

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            public void actionPerformed(final ActionEvent e) {
                approveButton.getAction().actionPerformed(e);
            }
        });


        fc.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(final HierarchyEvent e) {
                if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0
                    && fc.isShowing()) {
                    fileNameField.requestFocus();
                    fileNameField.selectAll();

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    @Override
    protected void installListeners() {
        if (WindowsLookAndFeel.isOnVista()) {
            installWindowListener();
            hierarchyListener = 
                new HierarchyListener() {
                    public void hierarchyChanged(HierarchyEvent e) {
                        if ((e.getChangeFlags() 
                                & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0) {
                            if (menuBar.isDisplayable()) {
                                installWindowListener();

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     * is displayed, we need to invoke the isEnabled method on the action to enable / disable the menu
     * @param menuCmd
     */
    private static void monitor(final JMenuItem menuCmd) {
      installMonitorForParent(menuCmd);
      menuCmd.addHierarchyListener(new HierarchyListener() {
        public void hierarchyChanged(HierarchyEvent e) {
          if (e.getID() == HierarchyEvent.HIERARCHY_CHANGED && (e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED) != 0) {
            installMonitorForParent(menuCmd);
          }
        }

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     * is displayed, we need to invoke the isEnabled method on the action to enable / disable the menu
     * @param menuCmd
     */
    private static void monitor(final JMenuItem menuCmd) {
      installMonitorForParent(menuCmd);
      menuCmd.addHierarchyListener(new HierarchyListener() {
        public void hierarchyChanged(HierarchyEvent e) {
          if (e.getID() == HierarchyEvent.HIERARCHY_CHANGED && (e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED) != 0) {
            installMonitorForParent(menuCmd);
          }
        }

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     * is displayed, we need to invoke the isEnabled method on the action to enable / disable the menu
     * @param menuCmd
     */
    private static void monitor(final JMenuItem menuCmd) {
      installMonitorForParent(menuCmd);
      menuCmd.addHierarchyListener(new HierarchyListener() {
        public void hierarchyChanged(HierarchyEvent e) {
          if (e.getID() == HierarchyEvent.HIERARCHY_CHANGED && (e.getChangeFlags() & HierarchyEvent.PARENT_CHANGED) != 0) {
            installMonitorForParent(menuCmd);
          }
        }

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        final DropTarget dt = new DropTarget();
        dt.addDropTargetListener(dropListener);


        // Listen for hierarchy changes and remove the
        // drop target when the parent gets cleared out.
        c.addHierarchyListener(new HierarchyListener()
        {
            public void hierarchyChanged(HierarchyEvent evt)
            {
                final Component parent = c.getParent();
                if (parent == null) {

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    @Override
    protected void installListeners() {
        if (WindowsLookAndFeel.isOnVista()) {
            installWindowListener();
            hierarchyListener =
                new HierarchyListener() {
                    public void hierarchyChanged(HierarchyEvent e) {
                        if ((e.getChangeFlags()
                                & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0) {
                            if (menuBar.isDisplayable()) {
                                installWindowListener();

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                          final boolean addStyleBox) throws HeadlessException {
    super();
    this.modeController = modeController;
    this.addStyleBox = addStyleBox;
    this.uiFactory = uiFactory;
    addHierarchyListener(new HierarchyListener() {
      
      public void hierarchyChanged(HierarchyEvent e) {
        if(isDisplayable()){
          removeHierarchyListener(this);
          init();

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