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

                });
            }
            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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  NativeComponentProxyPanel(NativeComponentWrapper nativeComponentWrapper, boolean isVisibilityConstrained, boolean isDestructionOnFinalization, boolean isProxiedFiliation) {
    super(nativeComponentWrapper);
    this.isDestructionOnFinalization = isDestructionOnFinalization;
    this.isVisibilityConstrained = isVisibilityConstrained;
    hierarchyListener = new HierarchyListener() {
      public void hierarchyChanged(HierarchyEvent e) {
        long changeFlags = e.getChangeFlags();
        if((changeFlags & (HierarchyEvent.SHOWING_CHANGED)) != 0) {
          if(NativeComponentProxyPanel.this.isVisibilityConstrained) {
            adjustEmbeddedPanelShape();

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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 NativeComponentWrapper(Component nativeComponent) {
    this.nativeComponent = nativeComponent;
    // Check that it does not have already a parent
    checkParent();
    // Add a check to ensure that its parent is an embeddable component.
    nativeComponent.addHierarchyListener(new HierarchyListener() {
      public void hierarchyChanged(HierarchyEvent e) {
        long changeFlags = e.getChangeFlags();
        if((changeFlags & HierarchyEvent.PARENT_CHANGED) != 0) {
          checkParent();
        }

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    /**
     * Lets this controller know about the panel that it is controlling.
     */
    public void setControlledPanel (final JComponent panel)
    {
        panel.addHierarchyListener(new HierarchyListener() {
            public void hierarchyChanged (HierarchyEvent e) {
                boolean nowShowing = panel.isDisplayable();
                //System.err.println("Controller." + Controller.this +
                //    "  nowShowing=" + nowShowing +
                //    ", wasShowing=" + _showing);

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