private JComponent createLogo() {
      NonOpaquePanel panel = new NonOpaquePanel(new BorderLayout());
      ApplicationInfoEx app = ApplicationInfoEx.getInstanceEx();
      JLabel logo = new JLabel(IconLoader.getIcon(app.getWelcomeScreenLogoUrl()));
      logo.setBorder(JBUI.Borders.empty(30, 0, 10, 0));
      logo.setHorizontalAlignment(SwingConstants.CENTER);
      panel.add(logo, BorderLayout.NORTH);
      JLabel appName = new JLabel(ApplicationNamesInfo.getInstance().getFullProductName());
      Font font = getProductFont();
      appName.setForeground(JBColor.foreground());
      appName.setFont(font.deriveFont(JBUI.scale(36f)).deriveFont(Font.PLAIN));
      appName.setHorizontalAlignment(SwingConstants.CENTER);
      String appVersion = "Version " + app.getFullVersion();

      if (app.isEAP() && app.getBuild().getBuildNumber() < Integer.MAX_VALUE) {
        appVersion += " (" + app.getBuild().asString() + ")";
      }

      JLabel version = new JLabel(appVersion);
      version.setFont(getProductFont().deriveFont(JBUI.scale(16f)));
      version.setHorizontalAlignment(SwingConstants.CENTER);
      version.setForeground(Gray._128);

      panel.add(appName);
      panel.add(version, BorderLayout.SOUTH);
      panel.setBorder(JBUI.Borders.emptyBottom(20));
      return panel;
    }
 @Override
 public void actionPerformed(AnActionEvent e) {
   JPanel result = new JPanel(new BorderLayout());
   JLabel label = new JLabel("Lines around:");
   label.setBorder(BorderFactory.createEmptyBorder(4, 4, 0, 0));
   JPanel wrapper = new JPanel(new BorderLayout());
   wrapper.add(label, BorderLayout.NORTH);
   result.add(wrapper, BorderLayout.WEST);
   final JSlider slider = new JSlider(JSlider.HORIZONTAL, 1, 5, 1);
   slider.setMinorTickSpacing(1);
   slider.setPaintTicks(true);
   slider.setPaintTrack(true);
   slider.setSnapToTicks(true);
   UIUtil.setSliderIsFilled(slider, true);
   slider.setPaintLabels(true);
   slider.setLabelTable(LABELS);
   result.add(slider, BorderLayout.CENTER);
   final VcsConfiguration configuration = VcsConfiguration.getInstance(myProject);
   for (int i = 0; i < ourMarks.length; i++) {
     int mark = ourMarks[i];
     if (mark == configuration.SHORT_DIFF_EXTRA_LINES) {
       slider.setValue(i + 1);
     }
   }
   JBPopup popup =
       JBPopupFactory.getInstance().createComponentPopupBuilder(result, slider).createPopup();
   popup.setFinalRunnable(
       new Runnable() {
         @Override
         public void run() {
           int value = slider.getModel().getValue();
           if (configuration.SHORT_DIFF_EXTRA_LINES != ourMarks[value - 1]) {
             configuration.SHORT_DIFF_EXTRA_LINES = ourMarks[value - 1];
             myFragmentedContent.recalculate();
             refreshData(myFragmentedContent);
           }
         }
       });
   InputEvent inputEvent = e.getInputEvent();
   if (inputEvent instanceof MouseEvent) {
     int width = result.getPreferredSize().width;
     MouseEvent inputEvent1 = (MouseEvent) inputEvent;
     Point point1 = new Point(inputEvent1.getX() - width / 2, inputEvent1.getY());
     RelativePoint point = new RelativePoint(inputEvent1.getComponent(), point1);
     popup.show(point);
   } else {
     popup.showInBestPositionFor(e.getDataContext());
   }
 }
  public void buildUi() {
    myTopPanel = new JPanel(new BorderLayout());
    final JPanel wrapper = new JPanel();
    // final BoxLayout boxLayout = new BoxLayout(wrapper, BoxLayout.X_AXIS);
    wrapper.setLayout(new BorderLayout());
    myTitleLabel.setBorder(BorderFactory.createEmptyBorder(1, 2, 0, 0));
    wrapper.add(myTitleLabel, BorderLayout.WEST);
    DefaultActionGroup dag = new DefaultActionGroup();
    myPreviousDiff.copyShortcutFrom(ActionManager.getInstance().getAction("PreviousDiff"));
    myNextDiff.copyShortcutFrom(ActionManager.getInstance().getAction("NextDiff"));
    dag.add(new MyChangeContextAction());
    dag.add(myPreviousDiff);
    dag.add(myNextDiff);
    myPreviousDiff.registerCustomShortcutSet(myPreviousDiff.getShortcutSet(), myPanel);
    myNextDiff.registerCustomShortcutSet(myNextDiff.getShortcutSet(), myPanel);

    dag.add(new PopupAction());
    ActionToolbar toolbar =
        ActionManager.getInstance().createActionToolbar(ActionPlaces.UNKNOWN, dag, true);
    wrapper.add(toolbar.getComponent(), BorderLayout.EAST);

    myTopPanel.add(wrapper, BorderLayout.CENTER);

    final JPanel wrapperDiffs = new JPanel(new GridBagLayout());
    final JPanel oneMore = new JPanel(new BorderLayout());
    oneMore.add(wrapperDiffs, BorderLayout.NORTH);

    myCurrentHorizontal = myConfiguration.SHORT_DIFF_HORISONTALLY;
    myHorizontal = createPanel(true);
    myVertical = createPanel(false);

    myPanel.add(myTopPanel, BorderLayout.NORTH);
    myPanel.add(getCurrentPanel().getComponent(), BorderLayout.CENTER);

    myPreviousDiff.registerCustomShortcutSet(myPreviousDiff.getShortcutSet(), myParent);
    myNextDiff.registerCustomShortcutSet(myNextDiff.getShortcutSet(), myParent);
  }
  public static Pair<JPanel, JBList> createActionGroupPanel(
      ActionGroup action, final JComponent parent, final Runnable backAction) {
    JPanel actionsListPanel = new JPanel(new BorderLayout());
    actionsListPanel.setBackground(getProjectsBackground());
    final JBList list = new JBList(action.getChildren(null));
    list.setBackground(getProjectsBackground());
    list.installCellRenderer(
        new NotNullFunction<AnAction, JComponent>() {
          final JLabel label = new JLabel();

          {
            label.setBorder(JBUI.Borders.empty(3, 7));
          }

          @NotNull
          @Override
          public JComponent fun(AnAction action) {
            label.setText(action.getTemplatePresentation().getText());
            Icon icon = action.getTemplatePresentation().getIcon();
            label.setIcon(icon);
            return label;
          }
        });
    JScrollPane pane = ScrollPaneFactory.createScrollPane(list, true);
    pane.setBackground(getProjectsBackground());
    actionsListPanel.add(pane, BorderLayout.CENTER);
    if (backAction != null) {
      final JLabel back = new JLabel(AllIcons.Actions.Back);
      back.setBorder(JBUI.Borders.empty(3, 7, 10, 7));
      back.setHorizontalAlignment(SwingConstants.LEFT);
      new ClickListener() {
        @Override
        public boolean onClick(@NotNull MouseEvent event, int clickCount) {
          backAction.run();
          return true;
        }
      }.installOn(back);
      actionsListPanel.add(back, BorderLayout.SOUTH);
    }
    final Ref<Component> selected = Ref.create();
    final JPanel main = new JPanel(new BorderLayout());
    main.add(actionsListPanel, BorderLayout.WEST);

    ListSelectionListener selectionListener =
        new ListSelectionListener() {
          @Override
          public void valueChanged(ListSelectionEvent e) {
            if (e.getValueIsAdjusting()) {
              // Update when a change has been finalized.
              // For instance, selecting an element with mouse fires two consecutive
              // ListSelectionEvent events.
              return;
            }
            if (!selected.isNull()) {
              main.remove(selected.get());
            }
            Object value = list.getSelectedValue();
            if (value instanceof AbstractActionWithPanel) {
              JPanel panel = ((AbstractActionWithPanel) value).createPanel();
              panel.setBorder(JBUI.Borders.empty(7, 10));
              selected.set(panel);
              main.add(selected.get());

              for (JButton button : UIUtil.findComponentsOfType(main, JButton.class)) {
                if (button.getClientProperty(DialogWrapper.DEFAULT_ACTION) == Boolean.TRUE) {
                  parent.getRootPane().setDefaultButton(button);
                  break;
                }
              }

              main.revalidate();
              main.repaint();
            }
          }
        };
    list.addListSelectionListener(selectionListener);
    if (backAction != null) {
      new AnAction() {
        @Override
        public void actionPerformed(@NotNull AnActionEvent e) {
          backAction.run();
        }
      }.registerCustomShortcutSet(KeyEvent.VK_ESCAPE, 0, main);
    }
    return Pair.create(main, list);
  }