praktikum-holons/src/holeg/ui/view/information/HolonInformationPanel.java

package holeg.ui.view.information;

import holeg.model.AbstractCanvasObject;
import holeg.model.Flexibility;
import holeg.model.GroupNode;
import holeg.model.HolonElement;
import holeg.model.HolonObject;
import holeg.model.HolonObject.HolonObjectState;
import holeg.model.HolonSwitch;
import holeg.model.Node;
import holeg.preferences.ColorPreference;
import holeg.preferences.ImagePreference;
import holeg.ui.controller.Control;
import holeg.ui.model.GuiSettings;
import holeg.ui.view.image.Import;
import holeg.utility.math.decimal.Format;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import java.util.stream.Collectors;
import javax.swing.BorderFactory;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JToggleButton;
import javax.swing.OverlayLayout;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import org.knowm.xchart.PieChart;
import org.knowm.xchart.PieChartBuilder;
import org.knowm.xchart.PieSeries.PieSeriesRenderStyle;
import org.knowm.xchart.XChartPanel;
import org.knowm.xchart.style.PieStyler;
import org.knowm.xchart.style.PieStyler.LabelType;

/**
 * This panel shows aggregated information of the selection of the canvas objects.
 */
public class HolonInformationPanel extends JPanel {
  private static final Logger log = Logger.getLogger(HolonInformationPanel.class.getName());
  private static final Color[] supplyStateColors = new Color[]{ColorPreference.HolonObject.Producer,
      ColorPreference.HolonObject.OverSupplied, ColorPreference.HolonObject.Supplied,
      ColorPreference.HolonObject.PartiallySupplied, ColorPreference.HolonObject.NotSupplied,
      ColorPreference.HolonObject.NoEnergy, ColorPreference.InformationPanel.NoData};
  private static final Color[] productionColors = new Color[]{ColorPreference.Energy.Production,
      ColorPreference.Energy.Consumption, ColorPreference.InformationPanel.NoData};
  private static final Color[] activeColors = new Color[]{ColorPreference.Element.Active,
      ColorPreference.Element.Inactive, ColorPreference.InformationPanel.NoData};
  private static final Color[] flexibilityColors = new Color[]{ColorPreference.Flexibility.Offered,
      ColorPreference.Flexibility.InUse, ColorPreference.Flexibility.OnCooldown,
      ColorPreference.Flexibility.NotOffered, ColorPreference.Flexibility.Unavailable,
      ColorPreference.Flexibility.NoFlexibility,
      ColorPreference.InformationPanel.NoData};
  private static final Color[] priorityColors = new Color[]{
      ColorPreference.Element.Priority.Essential,
      ColorPreference.Element.Priority.High, ColorPreference.Element.Priority.Medium,
      ColorPreference.Element.Priority.Low, ColorPreference.InformationPanel.NoData};
  private final int defaultWidth = 50;
  private final int defaultHeight = 200;
  private final PieChart supplyChart = createSupplyStateChart();
  private final PieChart priorityChart = createPriorityChart();
  private final PieChart flexibilityChart = createFlexibilityChart();
  private final PieChart energyChart = createProductionChart();
  private final PieChart activeChart = createActiveChart();

  private final JPanel graphPanel = new JPanel(new GridLayout(0, 2));

  private final JCheckBoxMenuItem producerCheckBox = new JCheckBoxMenuItem("Producer", true);
  private final JCheckBoxMenuItem overSuppliedCheckBox = new JCheckBoxMenuItem("Over supplied",
      true);
  private final JCheckBoxMenuItem suppliedCheckBox = new JCheckBoxMenuItem("Supplied", true);
  private final JCheckBoxMenuItem partiallySuppliedCheckBox = new JCheckBoxMenuItem(
      "Partial supplied", true);
  private final JCheckBoxMenuItem notSuppliedCheckBox = new JCheckBoxMenuItem("Not supplied", true);
  private final JCheckBoxMenuItem noEnergyCheckBox = new JCheckBoxMenuItem("No energy", true);

  private final JCheckBoxMenuItem essentialCheckBox = new JCheckBoxMenuItem("Essential", true);
  private final JCheckBoxMenuItem highCheckBox = new JCheckBoxMenuItem("High", true);
  private final JCheckBoxMenuItem mediumBox = new JCheckBoxMenuItem("Medium", true);
  private final JCheckBoxMenuItem lowCheckBox = new JCheckBoxMenuItem("Low", true);

  private final JCheckBoxMenuItem activeCheckBox = new JCheckBoxMenuItem("Active", true);
  private final JCheckBoxMenuItem inactiveCheckBox = new JCheckBoxMenuItem("Inactive", true);

  private final JCheckBoxMenuItem noFlexibilityCheckBox = new JCheckBoxMenuItem("No Flexibility",
      true);
  private final JCheckBoxMenuItem inUseCheckBox = new JCheckBoxMenuItem("In use", true);
  private final JCheckBoxMenuItem offeredCheckBox = new JCheckBoxMenuItem("Offered", true);
  private final JCheckBoxMenuItem notOfferedCheckBox = new JCheckBoxMenuItem("Not offered", true);
  private final JCheckBoxMenuItem onCooldownCheckBox = new JCheckBoxMenuItem("On cooldown", true);
  private final JCheckBoxMenuItem unavailableCheckBox = new JCheckBoxMenuItem("Unavailable", true);


  private final Control control;
  private final JLabel differenceEnergyLabelAmount = new JLabel("");

  public HolonInformationPanel(Control control) {
    control.OnSelectionChanged.addListener(this::updateCharts);
    control.OnCanvasUpdate.addListener(this::updateCharts);
    this.control = control;
    this.setLayout(new BorderLayout());
    initGraphPanel();
    this.setBackground(ColorPreference.Panel.Background);
    this.add(graphPanel, BorderLayout.CENTER);
  }

  private void updateCharts() {
    TempGroupNode tempGroupNode = new TempGroupNode();
    if (GuiSettings.getSelectedObjects().isEmpty()) {
      tempGroupNode.add(control.getModel().getCanvas());
    } else {
      tempGroupNode.addAll(GuiSettings.getSelectedObjects());
    }

    List<HolonObject> filteredHolonObjectList = tempGroupNode.getAllHolonObjectsRecursive()
        .filter(this::stateFilter).toList();
    Map<HolonObjectState, Long> stateMap = filteredHolonObjectList.stream()
        .collect(Collectors.groupingBy(HolonObject::getState, Collectors.counting()));
    // UPDATE SUPPLY STATE
    int producerAmount = Math.toIntExact(stateMap.getOrDefault(HolonObjectState.PRODUCER, 0L));
    int overSuppliedAmount = Math.toIntExact(
        stateMap.getOrDefault(HolonObjectState.OVER_SUPPLIED, 0L));
    int suppliedAmount = Math.toIntExact(stateMap.getOrDefault(HolonObjectState.SUPPLIED, 0L));
    int partiallySuppliedAmount = Math.toIntExact(
        stateMap.getOrDefault(HolonObjectState.PARTIALLY_SUPPLIED, 0L));
    int notSuppliedAmount = Math.toIntExact(
        stateMap.getOrDefault(HolonObjectState.NOT_SUPPLIED, 0L));
    int noEnergyAmount = Math.toIntExact(stateMap.getOrDefault(HolonObjectState.NO_ENERGY, 0L));

    supplyChart.updatePieSeries("Producer", producerAmount);
    supplyChart.updatePieSeries("Over supplied", overSuppliedAmount);
    supplyChart.updatePieSeries("Supplied", suppliedAmount);
    supplyChart.updatePieSeries("Partial supplied", partiallySuppliedAmount);
    supplyChart.updatePieSeries("Not supplied", notSuppliedAmount);
    supplyChart.updatePieSeries("No energy", noEnergyAmount);
    supplyChart.updatePieSeries("No Data", filteredHolonObjectList.isEmpty() ? 1 : 0);
    //UPDATE PRIORITIES

    List<HolonElement> filteredHolonElements = filteredHolonObjectList.stream()
        .flatMap(HolonObject::elementsStream)
        .filter(ele -> priorityFilter(ele) && activeFilter(ele) && flexibilityFilter(ele)).toList();
    Map<HolonElement.Priority, Long> priorityCounts = filteredHolonElements.stream()
        .collect(Collectors.groupingBy(HolonElement::getPriority, Collectors.counting()));

    long essential = priorityCounts.getOrDefault(HolonElement.Priority.Essential, 0L);
    long high = priorityCounts.getOrDefault(HolonElement.Priority.High, 0L);
    long medium = priorityCounts.getOrDefault(HolonElement.Priority.Medium, 0L);
    long low = priorityCounts.getOrDefault(HolonElement.Priority.Low, 0L);

    priorityChart.updatePieSeries("Essential", essential);
    priorityChart.updatePieSeries("High", high);
    priorityChart.updatePieSeries("Medium", medium);
    priorityChart.updatePieSeries("Low", low);
    boolean hasPriority = essential + high + medium + low > 0;
    priorityChart.updatePieSeries("No Data", hasPriority ? 0 : 1);

    // UPDATE PRODUCTION
    float consumption = filteredHolonElements.stream()
        .filter(element -> element.getActualEnergy() < 0)
        .map(element -> -element.getActualEnergy()).reduce(0.0f, Float::sum);
    float production = filteredHolonElements.stream()
        .map(HolonElement::getActualEnergy).filter(energy -> energy > 0).reduce(0.0f, Float::sum);

    float difference = Math.abs(production - consumption);
    energyChart.updatePieSeries("Production", production);
    energyChart.updatePieSeries("Consumption", consumption);
    energyChart.updatePieSeries("No Data", production + consumption == 0 ? 1 : 0);
    differenceEnergyLabelAmount.setText(Format.doubleFixedPlaces(1, difference));

    // UPDATE FLEXIBILITIES
    int inUse = 0;
    int offered = 0;
    int onCooldown = 0;
    int notOffered = 0;
    int unavailable = 0;

    List<Flexibility> flexList = filteredHolonElements.stream()
        .flatMap(ele -> ele.flexList.stream()).toList();
    for (Flexibility flex : flexList) {
      switch (flex.getState()) {
        case IN_USE -> inUse++;
        case NOT_OFFERED -> notOffered++;
        case OFFERED -> offered++;
        case ON_COOLDOWN -> onCooldown++;
        case UNAVAILABLE -> unavailable++;
        default -> {
        }
      }
    }
    int noFlexibility = (int) filteredHolonElements.stream().filter(ele -> ele.flexList.isEmpty())
        .count();
    flexibilityChart.updatePieSeries("No flexibility", noFlexibility);
    flexibilityChart.updatePieSeries("Offered", offered);
    flexibilityChart.updatePieSeries("In use", inUse);
    flexibilityChart.updatePieSeries("On cooldown", onCooldown);
    flexibilityChart.updatePieSeries("Not offered", notOffered);
    flexibilityChart.updatePieSeries("Unavailable", unavailable);
    boolean hasFlex = noFlexibility + offered + inUse + onCooldown + notOffered + unavailable > 0;
    flexibilityChart.updatePieSeries("No Data", hasFlex ? 0 : 1);

    Map<Boolean, Long> activeCounts = filteredHolonElements.stream()
        .collect(Collectors.groupingBy(HolonElement::isOn, Collectors.counting()));

    // UPDATE ActiveInActive
    int activeAmount = Math.toIntExact(activeCounts.getOrDefault(true, 0L));
    int inactiveAmounts = Math.toIntExact(activeCounts.getOrDefault(false, 0L));
    activeChart.updatePieSeries("Active", activeAmount);
    activeChart.updatePieSeries("Inactive", inactiveAmounts);
    activeChart.updatePieSeries("No Data", activeAmount + inactiveAmounts == 0 ? 1 : 0);
    this.revalidate();
    this.repaint();
  }


  private JPopupMenu createHolonStateSelection() {
    JPopupMenu menu = new JPopupMenu();
    producerCheckBox.addActionListener(clicked -> updateCharts());
    overSuppliedCheckBox.addActionListener(clicked -> updateCharts());
    suppliedCheckBox.addActionListener(clicked -> updateCharts());
    partiallySuppliedCheckBox.addActionListener(clicked -> updateCharts());
    notSuppliedCheckBox.addActionListener(clicked -> updateCharts());
    noEnergyCheckBox.addActionListener(clicked -> updateCharts());
    menu.add(producerCheckBox);
    menu.add(overSuppliedCheckBox);
    menu.add(suppliedCheckBox);
    menu.add(partiallySuppliedCheckBox);
    menu.add(notSuppliedCheckBox);
    menu.add(noEnergyCheckBox);
    return menu;
  }

  private JPopupMenu createPrioritySelection() {
    JPopupMenu menu = new JPopupMenu();
    essentialCheckBox.addActionListener(clicked -> updateCharts());
    highCheckBox.addActionListener(clicked -> updateCharts());
    mediumBox.addActionListener(clicked -> updateCharts());
    lowCheckBox.addActionListener(clicked -> updateCharts());
    menu.add(essentialCheckBox);
    menu.add(highCheckBox);
    menu.add(mediumBox);
    menu.add(lowCheckBox);
    return menu;
  }

  private JPopupMenu createActiveSelection() {
    JPopupMenu menu = new JPopupMenu();
    activeCheckBox.addActionListener(clicked -> updateCharts());
    inactiveCheckBox.addActionListener(clicked -> updateCharts());
    menu.add(activeCheckBox);
    menu.add(inactiveCheckBox);
    return menu;
  }

  private JPopupMenu createFlexibilitySelection() {
    JPopupMenu menu = new JPopupMenu();
    noFlexibilityCheckBox.addActionListener(clicked -> updateCharts());
    offeredCheckBox.addActionListener(clicked -> updateCharts());
    notOfferedCheckBox.addActionListener(clicked -> updateCharts());
    unavailableCheckBox.addActionListener(clicked -> updateCharts());
    inUseCheckBox.addActionListener(clicked -> updateCharts());
    onCooldownCheckBox.addActionListener(clicked -> updateCharts());
    menu.add(noFlexibilityCheckBox);
    menu.add(offeredCheckBox);
    menu.add(notOfferedCheckBox);
    menu.add(unavailableCheckBox);
    menu.add(inUseCheckBox);
    menu.add(onCooldownCheckBox);
    return menu;
  }


  private JPanel initMenuButtonPanel(JPopupMenu menu) {
    JPanel buttonPanel = new JPanel(new BorderLayout());
    MenuButton button = new MenuButton(
        new ImageIcon(Import.loadImage(ImagePreference.HolonInformationPanel.Filter, 20, 20)),
        menu);
    buttonPanel.add(button, BorderLayout.LINE_END);
    buttonPanel.setOpaque(false);
    button.setPressedIcon(new ImageIcon(
        Import.loadImage(ImagePreference.HolonInformationPanel.FilterHovered, 20, 20)));
    button.setRolloverIcon(new ImageIcon(
        Import.loadImage(ImagePreference.HolonInformationPanel.FilterHovered, 20, 20)));
    button.setBorderPainted(false);
    button.setBorder(null);
    button.setFocusable(false);
    button.setMargin(new Insets(0, 0, 0, 0));
    button.setContentAreaFilled(false);
    return buttonPanel;
  }


  private boolean stateFilter(HolonObject holonObject) {
    return switch (holonObject.getState()) {
      case PRODUCER -> producerCheckBox.isSelected();
      case OVER_SUPPLIED -> overSuppliedCheckBox.isSelected();
      case SUPPLIED -> suppliedCheckBox.isSelected();
      case PARTIALLY_SUPPLIED -> partiallySuppliedCheckBox.isSelected();
      case NOT_SUPPLIED -> notSuppliedCheckBox.isSelected();
      case NO_ENERGY -> noEnergyCheckBox.isSelected();
    };
  }

  private boolean priorityFilter(HolonElement ele) {
    return switch (ele.priority) {
      case Essential -> essentialCheckBox.isSelected();
      case High -> highCheckBox.isSelected();
      case Medium -> mediumBox.isSelected();
      case Low -> lowCheckBox.isSelected();
    };
  }

  private boolean activeFilter(HolonElement ele) {
    return ele.active ? activeCheckBox.isSelected() : inactiveCheckBox.isSelected();
  }

  private boolean flexibilityFilter(HolonElement ele) {
    if (ele.flexList.isEmpty()) {
      return noFlexibilityCheckBox.isSelected();
    }
    Map<Flexibility.FlexState, Long> flexes = ele.flexList.stream()
        .collect(Collectors.groupingBy(Flexibility::getState, Collectors.counting()));
    return flexes.keySet().stream().anyMatch(flexState -> switch (flexState) {
      case IN_USE -> inUseCheckBox.isSelected();
      case UNAVAILABLE -> unavailableCheckBox.isSelected();
      case OFFERED -> offeredCheckBox.isSelected();
      case NOT_OFFERED -> notOfferedCheckBox.isSelected();
      case ON_COOLDOWN -> onCooldownCheckBox.isSelected();
    });
  }

  private void initGraphPanel() {
    graphPanel.setBackground(ColorPreference.Panel.Background);
    XChartPanel<PieChart> panelHolonObject = new XChartPanel<>(supplyChart);
    panelHolonObject.setLayout(new BorderLayout());
    panelHolonObject.add(initMenuButtonPanel(createHolonStateSelection()), BorderLayout.PAGE_START);
    panelHolonObject.setBackground(ColorPreference.Panel.Background);
    graphPanel.add(panelHolonObject);
    XChartPanel<PieChart> panelPriority = new XChartPanel<>(priorityChart);
    panelPriority.setLayout(new BorderLayout());
    panelPriority.add(initMenuButtonPanel(createPrioritySelection()), BorderLayout.PAGE_START);
    panelPriority.setBackground(ColorPreference.Panel.Background);
    graphPanel.add(panelPriority);
    XChartPanel<PieChart> panelFlexibility = new XChartPanel<>(flexibilityChart);
    panelFlexibility.setLayout(new BorderLayout());
    panelFlexibility.add(initMenuButtonPanel(createFlexibilitySelection()),
        BorderLayout.PAGE_START);
    panelFlexibility.setBackground(ColorPreference.Panel.Background);
    graphPanel.add(panelFlexibility);
    Component panel = initEnergyChart();
    graphPanel.add(panel);
    XChartPanel<PieChart> panelActive = new XChartPanel<>(activeChart);
    panelActive.setLayout(new BorderLayout());
    panelActive.add(initMenuButtonPanel(createActiveSelection()), BorderLayout.PAGE_START);
    panelActive.setBackground(ColorPreference.Panel.Background);
    graphPanel.add(panelActive);
    graphPanel.setBorder(BorderFactory.createLineBorder(Color.lightGray));
  }

  private JLayeredPane initEnergyChart() {
    JLayeredPane panel = new JLayeredPane();
    JPanel panelMiddle = new JPanel(new GridBagLayout());
    XChartPanel<PieChart> panelEnergy = new XChartPanel<>(energyChart);
    panelEnergy.setBackground(ColorPreference.Panel.Background);
    GridBagConstraints c = new GridBagConstraints();
    c.gridx = 0;
    c.gridy = 0;
    c.insets = new Insets(15, 0, 0, 0); // top padding
    JLabel difference = new JLabel("Difference:");
    difference.setHorizontalAlignment(JLabel.CENTER);
    difference.setAlignmentX(Component.CENTER_ALIGNMENT);
    difference.setForeground(ColorPreference.Panel.Title);
    difference.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD, 10));
    panelMiddle.add(difference, c);

    differenceEnergyLabelAmount.setHorizontalAlignment(JLabel.CENTER);
    differenceEnergyLabelAmount.setForeground(Color.red);
    differenceEnergyLabelAmount.setAlignmentX(Component.CENTER_ALIGNMENT);
    differenceEnergyLabelAmount.setFont(new java.awt.Font("Arial", java.awt.Font.BOLD, 12));
    c.insets = new Insets(0, 0, 0, 0);
    c.gridy = 1;
    panelMiddle.add(differenceEnergyLabelAmount, c);
    panel.setLayout(new OverlayLayout(panel));
    panelEnergy.setOpaque(false);
    panelMiddle.setOpaque(false);
    panel.add(panelMiddle, Integer.valueOf(0));
    panel.add(panelEnergy, Integer.valueOf(1));
    return panel;
  }

  public void setDefaultPieChartSettings(PieChart chart) {
    PieStyler styler = chart.getStyler();
    styler.setChartTitleVisible(true);
    styler.setDefaultSeriesRenderStyle(PieSeriesRenderStyle.Donut);
    styler.setLabelsFont(new java.awt.Font("Arial", java.awt.Font.PLAIN, 14));
    styler.setLabelType(LabelType.Percentage);
    styler.setLabelsFontColor(Color.black);
    styler.setLabelsFontColorAutomaticEnabled(false);
    styler.setLabelsDistance(0.8);
    styler.setChartFontColor(ColorPreference.Panel.Title);
    styler.setToolTipsEnabled(true);
    styler.setPlotContentSize(0.9);
    styler.setPlotBackgroundColor(ColorPreference.Panel.Transparent);
    styler.setPlotBorderColor(ColorPreference.Panel.Transparent);
    styler.setLegendVisible(false);
    styler.setChartBackgroundColor(ColorPreference.Panel.Transparent);
  }

  public PieChart createSupplyStateChart() {
    PieChart chart = new PieChartBuilder().width(defaultWidth).height(defaultHeight)
        .title("HolonObjects").build();
    setDefaultPieChartSettings(chart);

    chart.getStyler().setSeriesColors(supplyStateColors);

    // Series
    chart.addSeries("Producer", 0);
    chart.addSeries("Over supplied", 0);
    chart.addSeries("Supplied", 0);
    chart.addSeries("Partial supplied", 0);
    chart.addSeries("Not supplied", 0);
    chart.addSeries("No energy", 0);
    chart.addSeries("No Data", 0);
    return chart;
  }

  public PieChart createPriorityChart() {
    PieChart chart = new PieChartBuilder().width(defaultWidth).height(defaultHeight)
        .title("Priorities").build();
    setDefaultPieChartSettings(chart);
    // Customize Chart

    chart.getStyler().setSeriesColors(priorityColors);
    // Series
    chart.addSeries("Essential", 0);
    chart.addSeries("High", 0);
    chart.addSeries("Medium", 0);
    chart.addSeries("Low", 0);
    chart.addSeries("No Data", 0);
    return chart;
  }

  public PieChart createFlexibilityChart() {
    PieChart chart = new PieChartBuilder().width(defaultWidth).height(defaultHeight)
        .title("Flexibilities").build();
    setDefaultPieChartSettings(chart);
    // Customize Chart

    chart.getStyler().setSeriesColors(flexibilityColors);
    // Series
    chart.addSeries("Offered", 0);
    chart.addSeries("In use", 0);
    chart.addSeries("On cooldown", 0);
    chart.addSeries("Not offered", 0);
    chart.addSeries("Unavailable", 0);
    chart.addSeries("No flexibility", 0);
    chart.addSeries("No Data", 0);
    return chart;
  }

  public PieChart createProductionChart() {
    PieChart chart = new PieChartBuilder().width(defaultWidth).height(defaultHeight)
        .title("Production vs. Consumption").build();
    setDefaultPieChartSettings(chart);

    // Customize Chart
    // Customize Chart

    chart.getStyler().setSeriesColors(productionColors);
    // Series
    chart.addSeries("Production", 0);
    chart.addSeries("Consumption", 0);
    chart.addSeries("No Data", 0);
    return chart;
  }

  public PieChart createActiveChart() {
    PieChart chart = new PieChartBuilder().width(defaultWidth).height(defaultHeight).title("Active")
        .build();
    setDefaultPieChartSettings(chart);
    // Customize Chart
    // Customize Chart

    chart.getStyler().setSeriesColors(activeColors);
    // Series
    chart.addSeries("Active", 0);
    chart.addSeries("Inactive", 0);
    chart.addSeries("No Data", 0);
    return chart;
  }

  /**
   * A MenuButton that shows a popupmenu on click.
   */
  public static class MenuButton extends JToggleButton {

    JPopupMenu popup;

    public MenuButton(Icon icon, JPopupMenu menu) {
      super(icon);
      this.popup = menu;
      addActionListener(clicked -> {
        if (MenuButton.this.isSelected()) {
          popup.show(MenuButton.this, 0, MenuButton.this.getBounds().height);
        } else {
          popup.setVisible(false);
        }
      });
      popup.addPopupMenuListener(new PopupMenuListener() {
        @Override
        public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
        }

        @Override
        public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
          MenuButton.this.setSelected(false);
        }

        @Override
        public void popupMenuCanceled(PopupMenuEvent e) {
        }
      });
    }
  }

  /**
   * A temporary groupNode that don't interfere with ownership like a normal GroupNode.
   */
  private static class TempGroupNode extends GroupNode {

    public TempGroupNode() {
      super("temp");
    }

    @Override
    public void add(AbstractCanvasObject object) {
      if (object instanceof HolonObject hObject) {
        objectList.add(hObject);
      } else if (object instanceof HolonSwitch hSwitch) {
        switchList.add(hSwitch);
      } else if (object instanceof Node node) {
        nodeList.add(node);
      } else if (object instanceof GroupNode groupNode) {
        groupNodeList.add(groupNode);
      }
    }
    @Override
    public void remove(AbstractCanvasObject object) {
      if (object instanceof HolonObject hObject) {
        objectList.remove(hObject);
      } else if (object instanceof HolonSwitch hSwitch) {
        switchList.remove(hSwitch);
      } else if (object instanceof Node node) {
        nodeList.remove(node);
      } else if (object instanceof GroupNode groupNode) {
        groupNodeList.remove(groupNode);
      }
    }
  }
}