@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);
  }