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


        splitter.setContinuousLayout(true);


        //This little bit of tedium is so we can set our size based on window's size. This listens
        //for when the window is actually shown. It then adds a listen to store the location.
        splitter.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(HierarchyEvent e) {
                if (HierarchyEvent.SHOWING_CHANGED == (e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED)) {
                    splitter.removeHierarchyListener(this); //we only want the first one of these, so remove ourselves as a listener.
                    Window window = SwingUtilities.getWindowAncestor(splitter);
                    if (window != null) {

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   */
  public static void addWindowListener(final Component source, final WindowListener listener) {
    if (source instanceof Window) {
      ((Window)source).addWindowListener(listener);
    } else {
      source.addHierarchyListener(new HierarchyListener() {
        @Override public void hierarchyChanged(HierarchyEvent e) {
          if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) == HierarchyEvent.SHOWING_CHANGED) {
            SwingUtilities.getWindowAncestor(source).addWindowListener(listener);
          }
        }

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    _path.getDocument().addDocumentListener(new MyDocumentAdapter());
    if (!_path.getText().isEmpty()) {
      _selectedFile = new File(_path.getText());
    }
    _path.addHierarchyListener(new HierarchyListener() {
      public void hierarchyChanged(final HierarchyEvent e) {
        if (_path.isVisible()) {
          _dialogBuilder.setOkActionEnabled(validateDirectory(_path.getDocument()));
        }
      }

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      getDetectorTextPanel().setPreferredSize(preferredSize);
      scrollPane.setBorder(null);
      //mainPanel.add(getDetectorTextPanel(), "1, 9, 1, 9");


      final JSplitPane splitPane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, true, detectorPanel, getDetectorTextPanel());
      splitPane.addHierarchyListener(new HierarchyListener() {
        public void hierarchyChanged(final HierarchyEvent e) {
          if (e.getChangeFlags() == HierarchyEvent.SHOWING_CHANGED) {
            if (splitPane.isShowing()) {
              splitPane.setDividerLocation(0.75);
            }

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    _importFile.getDocument().addDocumentListener(new MyDocumentAdapter());
    if (!_importFile.getText().isEmpty()) {
      _selectedFile = new File(_importFile.getText());
    }
    _importFile.addHierarchyListener(new HierarchyListener() {
      public void hierarchyChanged(final HierarchyEvent e) {
        if (_importFile.isVisible()) {
          _dialogBuilder.setOkActionEnabled(validateFile(_importFile.getDocument()));
        }
      }

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                });
            }
            else {
                // Hierarchy events are fired in direct response to
                // displayability changes
                w.addHierarchyListener(new HierarchyListener() {
                    public void hierarchyChanged(HierarchyEvent e) {
                        if ((e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0
                            && e.getComponent().isDisplayable()) {
                            e.getComponent().removeHierarchyListener(this);
                            action.run();

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  public RootMenuPiece( JMenu menu ){
    if( menu == null )
      throw new NullPointerException( "menu must not be null" );
    this.menu = menu;


        menu.addHierarchyListener( new HierarchyListener(){
      public void hierarchyChanged( HierarchyEvent e ){
        if( (e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0 ){
          EventQueue.invokeLater( new Runnable(){
            public void run(){
              checkVisibility();

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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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    }


    protected ComponentView(ViewContext viewContext) {
        this.viewContext = viewContext;
        this.component = initComponent();
        this.component.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(HierarchyEvent e) {
                if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0) {
                    if (!first) {
                        onFirstVisible();
                        first = true;

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    }


    protected ComponentView(ViewContext viewContext) {
        this.viewContext = viewContext;
        this.component = initComponent();
        this.component.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged(HierarchyEvent e) {
                if (e.getChangeFlags() == HierarchyEvent.SHOWING_CHANGED) {
                    if (!first) {
                        onVisible();
                        first = true;

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