private void setupCentralPanel() {
    myCentralPanel.removeAll();
    if (myUsagePreviewPanel != null) {
      Disposer.dispose(myUsagePreviewPanel);
      myUsagePreviewPanel = null;
    }
    JScrollPane pane = ScrollPaneFactory.createScrollPane(myTree);

    if (UsageViewSettings.getInstance().IS_PREVIEW_USAGES) {
      Splitter splitter =
          new Splitter(false, UsageViewSettings.getInstance().PREVIEW_USAGES_SPLITTER_PROPORTIONS);
      pane.putClientProperty(UIUtil.KEEP_BORDER_SIDES, SideBorder.RIGHT);

      splitter.setFirstComponent(pane);
      myUsagePreviewPanel = new UsagePreviewPanel(myProject);
      myUsagePreviewPanel.setBorder(IdeBorderFactory.createBorder(SideBorder.LEFT));
      Disposer.register(this, myUsagePreviewPanel);
      splitter.setSecondComponent(myUsagePreviewPanel);
      myCentralPanel.add(splitter, BorderLayout.CENTER);
    } else {
      myCentralPanel.add(pane, BorderLayout.CENTER);
    }
    myCentralPanel.add(myButtonPanel, BorderLayout.SOUTH);

    myRootPanel.revalidate();
  }
  @Override
  protected JComponent createCenterPanel() {
    JPanel panel = new JPanel(new BorderLayout());

    // Toolbar

    DefaultActionGroup group = new DefaultActionGroup();

    fillToolbarActions(group);

    group.addSeparator();

    ExpandAllAction expandAllAction = new ExpandAllAction();
    expandAllAction.registerCustomShortcutSet(
        new CustomShortcutSet(
            KeymapManager.getInstance()
                .getActiveKeymap()
                .getShortcuts(IdeActions.ACTION_EXPAND_ALL)),
        myTree);
    group.add(expandAllAction);

    CollapseAllAction collapseAllAction = new CollapseAllAction();
    collapseAllAction.registerCustomShortcutSet(
        new CustomShortcutSet(
            KeymapManager.getInstance()
                .getActiveKeymap()
                .getShortcuts(IdeActions.ACTION_COLLAPSE_ALL)),
        myTree);
    group.add(collapseAllAction);

    panel.add(
        ActionManager.getInstance()
            .createActionToolbar(ActionPlaces.UNKNOWN, group, true)
            .getComponent(),
        BorderLayout.NORTH);

    // Tree
    expandFirst();
    defaultExpandTree();
    installSpeedSearch();

    JScrollPane scrollPane = ScrollPaneFactory.createScrollPane(myTree);
    scrollPane.setPreferredSize(new Dimension(350, 450));
    panel.add(scrollPane, BorderLayout.CENTER);

    return panel;
  }
  public MavenArchetypesStep(MavenModuleBuilder builder, @Nullable StepAdapter step) {
    myBuilder = builder;
    myStep = step;
    Disposer.register(this, myLoadingIcon);

    myArchetypesTree = new Tree();
    myArchetypesTree.setModel(new DefaultTreeModel(new DefaultMutableTreeNode()));
    JScrollPane archetypesScrollPane = ScrollPaneFactory.createScrollPane(myArchetypesTree);

    myArchetypesPanel.add(archetypesScrollPane, "archetypes");

    JPanel loadingPanel = new JPanel(new GridBagLayout());
    JPanel bp = new JPanel(new BorderLayout(10, 10));
    bp.add(new JLabel("Loading archetype list..."), BorderLayout.NORTH);
    bp.add(myLoadingIcon, BorderLayout.CENTER);

    loadingPanel.add(bp, new GridBagConstraints());

    myArchetypesPanel.add(ScrollPaneFactory.createScrollPane(loadingPanel), "loading");
    ((CardLayout) myArchetypesPanel.getLayout()).show(myArchetypesPanel, "archetypes");

    myUseArchetypeCheckBox.addItemListener(
        new ItemListener() {
          @Override
          public void itemStateChanged(ItemEvent e) {
            updateComponents();
            archetypeMayBeChanged();
          }
        });

    myAddArchetypeButton.addActionListener(
        new ActionListener() {
          public void actionPerformed(ActionEvent e) {
            doAddArchetype();
          }
        });

    myArchetypesTree.setRootVisible(false);
    myArchetypesTree.setShowsRootHandles(true);
    myArchetypesTree.setCellRenderer(new MyRenderer());
    myArchetypesTree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);

    myArchetypesTree
        .getSelectionModel()
        .addTreeSelectionListener(
            new TreeSelectionListener() {
              public void valueChanged(TreeSelectionEvent e) {
                updateArchetypeDescription();
                archetypeMayBeChanged();
              }
            });

    new TreeSpeedSearch(
            myArchetypesTree,
            new Convertor<TreePath, String>() {
              public String convert(TreePath path) {
                MavenArchetype info =
                    getArchetypeInfoFromPathComponent(path.getLastPathComponent());
                return info.groupId + ":" + info.artifactId + ":" + info.version;
              }
            })
        .setComparator(new SpeedSearchComparator(false));

    myArchetypeDescriptionField.setEditable(false);
    myArchetypeDescriptionField.setBackground(UIUtil.getPanelBackground());

    requestUpdate();
    updateComponents();
  }
  protected void reInitWholePanelIfNeeded() {
    if (!myToReInitWholePanel) return;

    myWholePanel =
        new JPanel(new BorderLayout()) {
          public void addNotify() {
            super.addNotify();
            MasterDetailsComponent.this.addNotify();

            TreeModel m = myTree.getModel();
            if (m instanceof DefaultTreeModel) {
              DefaultTreeModel model = (DefaultTreeModel) m;
              for (int eachRow = 0; eachRow < myTree.getRowCount(); eachRow++) {
                TreePath eachPath = myTree.getPathForRow(eachRow);
                Object component = eachPath.getLastPathComponent();
                if (component instanceof TreeNode) {
                  model.nodeChanged((TreeNode) component);
                }
              }
            }
          }
        };
    mySplitter.setHonorComponentsMinimumSize(true);
    myWholePanel.add(mySplitter, BorderLayout.CENTER);

    JPanel left =
        new JPanel(new BorderLayout()) {
          public Dimension getMinimumSize() {
            final Dimension original = super.getMinimumSize();
            return new Dimension(Math.max(original.width, 100), original.height);
          }
        };

    if (isNewProjectSettings()) {
      ToolbarDecorator decorator = ToolbarDecorator.createDecorator(myTree);
      DefaultActionGroup group = createToolbarActionGroup();
      if (group != null) {
        decorator.setActionGroup(group);
      }
      // left.add(myNorthPanel, BorderLayout.NORTH);
      myMaster =
          decorator.setAsUsualTopToolbar().setPanelBorder(JBUI.Borders.empty()).createPanel();
      myNorthPanel.setVisible(false);
    } else {
      left.add(myNorthPanel, BorderLayout.NORTH);
      myMaster = ScrollPaneFactory.createScrollPane(myTree);
    }
    left.add(myMaster, BorderLayout.CENTER);
    mySplitter.setFirstComponent(left);

    final JPanel right = new JPanel(new BorderLayout());
    right.add(myDetails.getComponent(), BorderLayout.CENTER);
    if (!isNewProjectSettings()) {
      myWholePanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
    }

    mySplitter.setSecondComponent(right);

    GuiUtils.replaceJSplitPaneWithIDEASplitter(myWholePanel);

    myToReInitWholePanel = false;
  }
  public ActionsTree() {
    myRoot = new DefaultMutableTreeNode(ROOT);

    myTree =
        new Tree(new MyModel(myRoot)) {
          @Override
          public void paint(Graphics g) {
            super.paint(g);
            Rectangle visibleRect = getVisibleRect();
            Rectangle clip = g.getClipBounds();
            for (int row = 0; row < getRowCount(); row++) {
              Rectangle rowBounds = getRowBounds(row);
              rowBounds.x = 0;
              rowBounds.width = Integer.MAX_VALUE;

              if (rowBounds.intersects(clip)) {
                Object node = getPathForRow(row).getLastPathComponent();

                if (node instanceof DefaultMutableTreeNode) {
                  Object data = ((DefaultMutableTreeNode) node).getUserObject();
                  Rectangle fullRowRect =
                      new Rectangle(
                          visibleRect.x, rowBounds.y, visibleRect.width, rowBounds.height);
                  paintRowData(this, data, fullRowRect, (Graphics2D) g);
                }
              }
            }
          }
        };
    myTree.setRootVisible(false);
    myTree.setShowsRootHandles(true);

    myTree.putClientProperty(WideSelectionTreeUI.STRIPED_CLIENT_PROPERTY, Boolean.TRUE);
    myTree.setCellRenderer(new KeymapsRenderer());
    myTree.addMouseMotionListener(
        new MouseMotionAdapter() {
          @Override
          public void mouseMoved(MouseEvent e) {
            String description = getDescription(e);
            if (description != null) {
              ActionMenu.showDescriptionInStatusBar(true, myTree, description);
            } else {
              ActionMenu.showDescriptionInStatusBar(false, myTree, null);
            }
          }

          @Nullable
          private String getDescription(@NotNull MouseEvent e) {
            TreePath path = myTree.getPathForLocation(e.getX(), e.getY());
            if (path == null) return null;

            DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent();
            if (node == null) return null;

            Object userObject = node.getUserObject();
            if (!(userObject instanceof String)) return null;

            String actionId = (String) userObject;
            AnAction action = ActionManager.getInstance().getActionOrStub(actionId);
            if (action == null) return null;

            return action.getTemplatePresentation().getDescription();
          }
        });

    myTree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);

    myComponent =
        ScrollPaneFactory.createScrollPane(
            myTree,
            ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
            ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
  }