@Nullable
  protected final JComponent createTitlePane() {
    final String description = myChooserDescriptor.getDescription();
    if (StringUtil.isEmptyOrSpaces(description)) return null;

    final JLabel label = new JLabel(description);
    label.setBorder(
        BorderFactory.createCompoundBorder(
            new SideBorder(UIUtil.getPanelBackground().darker(), SideBorder.BOTTOM),
            JBUI.Borders.empty(0, 5, 10, 5)));
    return label;
  }
  private static class MyRenderer extends ColoredTableCellRenderer {
    private static final Border NO_FOCUS_BORDER = BorderFactory.createEmptyBorder(1, 1, 1, 1);

    protected void customizeCellRenderer(
        JTable table, Object value, boolean selected, boolean hasFocus, int row, int column) {
      setPaintFocusBorder(false);
      setFocusBorderAroundIcon(true);
      setBorder(NO_FOCUS_BORDER);

      final TableItem tableItem = ((TableItem) value);
      tableItem.getCellAppearance().customize(this);
    }
  }
  private static class TableItemRenderer extends ColoredTableCellRenderer {
    private final Border NO_FOCUS_BORDER = BorderFactory.createEmptyBorder(1, 1, 1, 1);
    private StructureConfigurableContext myContext;

    public TableItemRenderer(StructureConfigurableContext context) {
      myContext = context;
    }

    @Override
    protected void customizeCellRenderer(
        JTable table, Object value, boolean selected, boolean hasFocus, int row, int column) {
      setPaintFocusBorder(false);
      setFocusBorderAroundIcon(true);
      setBorder(NO_FOCUS_BORDER);
      if (value instanceof ClasspathTableItem<?>) {
        final ClasspathTableItem<?> tableItem = (ClasspathTableItem<?>) value;
        getCellAppearance(tableItem, myContext, selected).customize(this);
        setToolTipText(tableItem.getTooltipText());
      }
    }
  }
 public void setAdText(@NotNull final String s, int alignment) {
   if (myAdComponent == null) {
     myAdComponent =
         HintUtil.createAdComponent(s, BorderFactory.createEmptyBorder(1, 5, 1, 5), alignment);
     JPanel wrapper =
         new JPanel(new BorderLayout()) {
           @Override
           protected void paintComponent(Graphics g) {
             g.setColor(Gray._135);
             g.drawLine(0, 0, getWidth(), 0);
             super.paintComponent(g);
           }
         };
     wrapper.setOpaque(false);
     wrapper.setBorder(new EmptyBorder(1, 0, 0, 0));
     wrapper.add(myAdComponent, BorderLayout.CENTER);
     myContent.add(wrapper, BorderLayout.SOUTH);
     pack(false, true);
   } else {
     myAdComponent.setText(s);
     myAdComponent.setHorizontalAlignment(alignment);
   }
 }
  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;
  }
  @Override
  protected JComponent createCenterPanel() {
    final FileChooserDescriptor descriptor =
        FileChooserDescriptorFactory.createAllButJarContentsDescriptor();
    calculateRoots();
    final ArrayList<VirtualFile> list = new ArrayList<VirtualFile>(myRoots);
    final Comparator<VirtualFile> comparator =
        new Comparator<VirtualFile>() {
          @Override
          public int compare(VirtualFile o1, VirtualFile o2) {
            final boolean isDir1 = o1.isDirectory();
            final boolean isDir2 = o2.isDirectory();
            if (isDir1 != isDir2) return isDir1 ? -1 : 1;

            final String module1 = myModulesSet.get(o1);
            final String path1 = module1 != null ? module1 : o1.getPath();
            final String module2 = myModulesSet.get(o2);
            final String path2 = module2 != null ? module2 : o2.getPath();
            return path1.compareToIgnoreCase(path2);
          }
        };
    descriptor.setRoots(list);
    myTree = new Tree();
    myTree.setMinimumSize(new Dimension(200, 200));
    myTree.setBorder(BORDER);
    myTree.setShowsRootHandles(true);
    myTree.setRootVisible(true);
    myTree.getExpandableItemsHandler().setEnabled(false);
    final MyCheckboxTreeCellRenderer cellRenderer =
        new MyCheckboxTreeCellRenderer(
            mySelectionManager, myModulesSet, myProject, myTree, myRoots);
    final FileSystemTreeImpl fileSystemTree =
        new FileSystemTreeImpl(
            myProject,
            descriptor,
            myTree,
            cellRenderer,
            null,
            new Convertor<TreePath, String>() {
              @Override
              public String convert(TreePath o) {
                final DefaultMutableTreeNode lastPathComponent =
                    ((DefaultMutableTreeNode) o.getLastPathComponent());
                final Object uo = lastPathComponent.getUserObject();
                if (uo instanceof FileNodeDescriptor) {
                  final VirtualFile file = ((FileNodeDescriptor) uo).getElement().getFile();
                  final String module = myModulesSet.get(file);
                  if (module != null) return module;
                  return file == null ? "" : file.getName();
                }
                return o.toString();
              }
            });
    final AbstractTreeUi ui = fileSystemTree.getTreeBuilder().getUi();
    ui.setNodeDescriptorComparator(
        new Comparator<NodeDescriptor>() {
          @Override
          public int compare(NodeDescriptor o1, NodeDescriptor o2) {
            if (o1 instanceof FileNodeDescriptor && o2 instanceof FileNodeDescriptor) {
              final VirtualFile f1 = ((FileNodeDescriptor) o1).getElement().getFile();
              final VirtualFile f2 = ((FileNodeDescriptor) o2).getElement().getFile();
              return comparator.compare(f1, f2);
            }
            return o1.getIndex() - o2.getIndex();
          }
        });
    myRoot = (DefaultMutableTreeNode) myTree.getModel().getRoot();

    new ClickListener() {
      @Override
      public boolean onClick(@NotNull MouseEvent e, int clickCount) {
        int row = myTree.getRowForLocation(e.getX(), e.getY());
        if (row < 0) return false;
        final Object o = myTree.getPathForRow(row).getLastPathComponent();
        if (myRoot == o || getFile(o) == null) return false;

        Rectangle rowBounds = myTree.getRowBounds(row);
        cellRenderer.setBounds(rowBounds);
        Rectangle checkBounds = cellRenderer.myCheckbox.getBounds();
        checkBounds.setLocation(rowBounds.getLocation());

        if (checkBounds.height == 0) checkBounds.height = rowBounds.height;

        if (checkBounds.contains(e.getPoint())) {
          mySelectionManager.toggleSelection((DefaultMutableTreeNode) o);
          myTree.revalidate();
          myTree.repaint();
        }
        return true;
      }
    }.installOn(myTree);

    myTree.addKeyListener(
        new KeyAdapter() {
          public void keyPressed(KeyEvent e) {
            if (e.getKeyCode() == KeyEvent.VK_SPACE) {
              TreePath[] paths = myTree.getSelectionPaths();
              if (paths == null) return;
              for (TreePath path : paths) {
                if (path == null) continue;
                final Object o = path.getLastPathComponent();
                if (myRoot == o || getFile(o) == null) return;
                mySelectionManager.toggleSelection((DefaultMutableTreeNode) o);
              }

              myTree.revalidate();
              myTree.repaint();
              e.consume();
            }
          }
        });

    JBPanel panel = new JBPanel(new BorderLayout());
    panel.add(new JBScrollPane(fileSystemTree.getTree()), BorderLayout.CENTER);
    mySelectedLabel = new JLabel("");
    mySelectedLabel.setBorder(BorderFactory.createEmptyBorder(2, 0, 2, 0));
    panel.add(mySelectedLabel, BorderLayout.SOUTH);

    mySelectionManager.setSelectionChangeListener(
        new PlusMinus<VirtualFile>() {
          @Override
          public void plus(VirtualFile virtualFile) {
            mySelectedFiles.add(virtualFile);
            recalculateErrorText();
          }

          private void recalculateErrorText() {
            checkEmpty();
            if (mySelectionManager.canAddSelection()) {
              mySelectedLabel.setText("");
            } else {
              mySelectedLabel.setText(CAN_NOT_ADD_TEXT);
            }
            mySelectedLabel.revalidate();
          }

          @Override
          public void minus(VirtualFile virtualFile) {
            mySelectedFiles.remove(virtualFile);
            recalculateErrorText();
          }
        });
    return panel;
  }