Examples of java.awt.Component.addHierarchyListener()

java.awt.Component.addHierarchyListener()
Adds the specified hierarchy listener to receive hierarchy changed events from this component when the hierarchy to which this container belongs changes. If listener l is null, no exception is thrown and no action is performed.
Refer to AWT Threading Issues for details on AWT's threading model. @param l the hierarchy listener @see java.awt.event.HierarchyEvent @see java.awt.event.HierarchyListener @see #removeHierarchyListener @see #getHierarchyListeners @since 1.3

      else{
        popupForModel = null;
      }
      if (popupForModel != null) {
        final ControllerPopupMenuListener popupListener = new ControllerPopupMenuListener();
        popupForModel.addHierarchyListener(popupListener);
        popup = popupForModel;
      }
      else {
        popup = modeController.getUserInputListenerFactory().getMapPopup();
      }

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