@Override
  public void handleSelection(PartialDisc pdSelected) {

    PartialDisc pdRealRootElement = radialHierarchy.getRealRootElement();
    PartialDisc pdCurrentRootElement = radialHierarchy.getCurrentRootElement();

    if (pdSelected != pdRealRootElement && pdSelected.hasChildren()) {

      pdCurrentRootElement.setPDDrawingStrategyChildren(
          radialHierarchy.getDrawingStrategyManager().getDefaultDrawingStrategy(),
          iDisplayedHierarchyDepth);

      if (pdSelected == pdCurrentRootElement) {
        radialHierarchy.setCurrentSelectedElement(pdSelected);
        drawingController.setDrawingState(EDrawingStateType.ANIMATION_PARENT_ROOT_ELEMENT);
      } else {
        radialHierarchy.setCurrentSelectedElement(pdSelected);
        drawingController.setDrawingState(EDrawingStateType.ANIMATION_NEW_ROOT_ELEMENT);
      }
      radialHierarchy.setDisplayListDirty();
    } else {
      radialHierarchy.setNewSelection(SelectionType.SELECTION, pdSelected);
      radialHierarchy.setDisplayListDirty();
    }
  }
  @Override
  public void handleAlternativeSelection(PartialDisc pdSelected) {

    PartialDisc pdCurrentRootElement = radialHierarchy.getCurrentRootElement();

    if (pdSelected != pdCurrentRootElement
        && pdSelected.hasChildren()
        && pdSelected.getCurrentDepth() > 1) {

      pdCurrentRootElement.setPDDrawingStrategyChildren(
          radialHierarchy.getDrawingStrategyManager().getDefaultDrawingStrategy(),
          iDisplayedHierarchyDepth);

      radialHierarchy.setCurrentSelectedElement(pdSelected);
      drawingController.setDrawingState(EDrawingStateType.ANIMATION_POP_OUT_DETAIL_OUTSIDE);
      radialHierarchy.setDisplayListDirty();
    }
  }
  /**
   * Initializes drawing strategies for all selected elements of the radial hierarchy's selection
   * manager.
   *
   * @param mapSelectedDrawingStrategies Map is filled with key-value pairs where the key is a
   *     selected partial disc and its value is the corresponding drawing strategy.
   */
  private void initDrawingStrategies(
      HashMap<PartialDisc, PDDrawingStrategySelected> mapSelectedDrawingStrategies) {

    PartialDisc pdCurrentRootElement = radialHierarchy.getCurrentRootElement();
    int iMaxDisplayedHierarchyDepth = radialHierarchy.getMaxDisplayedHierarchyDepth();
    pdCurrentMouseOverElement = null;

    iDisplayedHierarchyDepth =
        Math.min(iMaxDisplayedHierarchyDepth, pdCurrentRootElement.getDepth());

    DrawingStrategyManager drawingStrategyManager = radialHierarchy.getDrawingStrategyManager();

    APDDrawingStrategy dsDefault = drawingStrategyManager.getDefaultDrawingStrategy();

    SelectionManager selectionManager = radialHierarchy.getSelectionManager();
    Set<Integer> setSelection = selectionManager.getElements(SelectionType.SELECTION);
    Set<Integer> setMouseOver = selectionManager.getElements(SelectionType.MOUSE_OVER);

    pdCurrentRootElement.setPDDrawingStrategyChildren(dsDefault, iDisplayedHierarchyDepth);

    HashMap<PartialDisc, SelectionType> mapSelectedElements =
        new HashMap<PartialDisc, SelectionType>();
    HashMap<PartialDisc, SelectionType> mapChildIndictatorElements =
        new HashMap<PartialDisc, SelectionType>();

    boolean bIsNewSelection = radialHierarchy.isNewSelection();

    // Take the mouse over element from the selected elements, if any and if
    // displayed.
    for (Integer elementID : setSelection) {
      PartialDisc pdSelected = radialHierarchy.getPartialDisc(elementID);
      if (pdSelected != null) {
        if (pdSelected.isCurrentlyDisplayed(pdCurrentRootElement, iDisplayedHierarchyDepth)) {
          pdCurrentMouseOverElement = pdSelected;
          break;
        }
      }
    }

    for (Integer elementID : setSelection) {
      PartialDisc pdSelected = radialHierarchy.getPartialDisc(elementID);
      if (pdSelected != null) {

        if (pdCurrentMouseOverElement == null && bIsNewSelection) {

          PartialDisc pdParent = pdSelected.getParent();
          if (pdParent == null) {
            pdCurrentRootElement = pdSelected;
          } else {
            pdCurrentRootElement = pdParent;
          }
          iDisplayedHierarchyDepth =
              Math.min(iMaxDisplayedHierarchyDepth, pdCurrentRootElement.getDepth());

          radialHierarchy.setCurrentRootElement(pdCurrentRootElement);
          radialHierarchy.setCurrentSelectedElement(pdCurrentRootElement);
          navigationHistory.addNewHistoryEntry(
              this, pdCurrentRootElement, pdCurrentRootElement, iMaxDisplayedHierarchyDepth);
          mapSelectedElements.put(pdSelected, SelectionType.SELECTION);
          pdCurrentMouseOverElement = pdSelected;
          continue;
        }

        PartialDisc pdIndicated =
            pdSelected.getFirstVisibleElementOnParentPathToRoot(
                pdCurrentRootElement, iDisplayedHierarchyDepth);

        if (pdIndicated == pdSelected) {
          mapSelectedElements.put(pdSelected, SelectionType.SELECTION);
        } else if (pdIndicated == null) {
          parentIndicatorType = SelectionType.SELECTION;
        } else {
          mapChildIndictatorElements.put(pdIndicated, SelectionType.SELECTION);
        }
      }
    }

    for (Integer elementID : setMouseOver) {
      PartialDisc pdMouseOver = radialHierarchy.getPartialDisc(elementID);
      if (pdMouseOver != null) {

        if (pdCurrentMouseOverElement == null) {
          if (pdMouseOver.isCurrentlyDisplayed(pdCurrentRootElement, iDisplayedHierarchyDepth)) {
            mapSelectedElements.put(pdMouseOver, SelectionType.MOUSE_OVER);
            pdCurrentMouseOverElement = pdMouseOver;
            continue;
          }
        }

        PartialDisc pdIndicated =
            pdMouseOver.getFirstVisibleElementOnParentPathToRoot(
                pdCurrentRootElement, iDisplayedHierarchyDepth);

        if (pdIndicated == pdMouseOver) {
          if (!mapSelectedElements.containsKey(pdMouseOver))
            mapSelectedElements.put(pdMouseOver, SelectionType.MOUSE_OVER);
        } else if (pdIndicated == null) {
          if (parentIndicatorType != SelectionType.SELECTION)
            parentIndicatorType = SelectionType.MOUSE_OVER;
        } else {
          if (!mapChildIndictatorElements.containsKey(pdIndicated))
            mapChildIndictatorElements.put(pdIndicated, SelectionType.MOUSE_OVER);
        }
      }
    }

    for (PartialDisc pdSelected : mapSelectedElements.keySet()) {
      PDDrawingStrategySelected dsCurrent =
          (PDDrawingStrategySelected)
              drawingStrategyManager.createDrawingStrategy(EPDDrawingStrategyType.SELECTED);

      if (mapSelectedElements.get(pdSelected) == SelectionType.SELECTION) {
        dsCurrent.setBorderColor(SelectionType.SELECTION.getColor().getRGBA());
      }
      if (mapChildIndictatorElements.containsKey(pdSelected)) {
        if (mapChildIndictatorElements.get(pdSelected) == SelectionType.SELECTION) {
          dsCurrent.setChildIndicatorColor(SelectionType.SELECTION.getColor().getRGBA());
        } else {
          dsCurrent.setChildIndicatorColor(SelectionType.MOUSE_OVER.getColor().getRGBA());
        }
        mapChildIndictatorElements.remove(pdSelected);
      }

      mapSelectedDrawingStrategies.put(pdSelected, dsCurrent);
      pdSelected.setPDDrawingStrategy(dsCurrent);
    }

    for (PartialDisc pdIndicated : mapChildIndictatorElements.keySet()) {
      APDDrawingStrategyChildIndicator dsCurrent =
          (APDDrawingStrategyChildIndicator)
              drawingStrategyManager.createDrawingStrategy(
                  drawingStrategyManager.getDefaultDrawingStrategy().getDrawingStrategyType());

      if (mapChildIndictatorElements.get(pdIndicated) == SelectionType.SELECTION) {
        dsCurrent.setChildIndicatorColor(SelectionType.SELECTION.getColor().getRGBA());
      } else {
        dsCurrent.setChildIndicatorColor(SelectionType.MOUSE_OVER.getColor().getRGBA());
      }

      pdIndicated.setPDDrawingStrategy(dsCurrent);
    }

    if (pdCurrentMouseOverElement != null) {
      APDDrawingStrategyDecorator dsLabelDecorator =
          new PDDrawingStrategyLabelDecorator(
              radialHierarchy.getDataDomain().getTable().getColorMapper());
      pdCurrentMouseOverElement.decoratePDDrawingStrategyChildren(
          dsLabelDecorator,
          Math.min(RadialHierarchyRenderStyle.MAX_LABELING_DEPTH, iDisplayedHierarchyDepth));
    }
  }