@Override
 protected void paintComponent(@NotNull Graphics g) {
   super.paintComponent(g);
   if (UIUtil.isUnderDarcula()) {
     g.setColor(UIUtil.getControlColor().brighter());
     g.fillRect(0, 0, getWidth(), getHeight());
   }
 }
  private static Color getButtonBackgroundColor() {
    Color color;

    if (isUsingDarculaUIFlavor()) {
      color = UIManager.getColor("ComboBox.darcula.arrowFillColor");
    } else {
      color = UIManager.getColor("ComboBox.buttonBackground");
    }

    return color == null ? UIUtil.getControlColor() : color;
  }
    private void doPaint(Graphics g) {
      GraphicsUtil.setupAntialiasing(g);

      final boolean isEmpty = getIcon() == null && StringUtil.isEmpty(getText());
      final Dimension size = getSize();
      if (isSmallVariant()) {
        final Graphics2D g2 = (Graphics2D) g;
        g2.setColor(UIUtil.getControlColor());
        final int w = getWidth();
        final int h = getHeight();
        if (getModel().isArmed() && getModel().isPressed()) {
          g2.setPaint(
              new GradientPaint(
                  0,
                  0,
                  UIUtil.getControlColor(),
                  0,
                  h,
                  ColorUtil.shift(UIUtil.getControlColor(), 0.8)));
        } else {
          g2.setPaint(
              new GradientPaint(
                  0,
                  0,
                  ColorUtil.shift(UIUtil.getControlColor(), 1.1),
                  0,
                  h,
                  ColorUtil.shift(UIUtil.getControlColor(), 0.9)));
        }
        g2.fillRect(2, 0, w - 2, h);
        GraphicsUtil.setupAntialiasing(g2);
        if (!myMouseInside) {
          g2.setPaint(
              new GradientPaint(
                  0, 0, UIUtil.getBorderColor(), 0, h, UIUtil.getBorderColor().darker()));
          // g2.setColor(UIUtil.getBorderColor());
        } else {
          g2.setPaint(
              new GradientPaint(
                  0,
                  0,
                  UIUtil.getBorderColor().darker(),
                  0,
                  h,
                  UIUtil.getBorderColor().darker().darker()));
        }
        g2.drawRect(2, 0, w - 3, h - 1);
        final Icon icon = getIcon();
        int x = 7;
        if (icon != null) {
          icon.paintIcon(null, g, x, (size.height - icon.getIconHeight()) / 2);
          x += icon.getIconWidth() + 3;
        }
        if (!StringUtil.isEmpty(getText())) {
          final Font font = getFont();
          g2.setFont(font);
          g2.setColor(UIManager.getColor("Panel.foreground"));
          g2.drawString(getText(), x, (size.height + font.getSize()) / 2 - 1);
        }
      } else {
        super.paintComponent(g);
      }
      final Insets insets = super.getInsets();
      final Icon icon = isEnabled() ? ARROW_ICON : DISABLED_ARROW_ICON;
      final int x;
      if (isEmpty) {
        x = (size.width - icon.getIconWidth()) / 2;
      } else {
        if (isSmallVariant()) {
          x = size.width - icon.getIconWidth() - insets.right + 1;
        } else {
          x =
              size.width
                  - icon.getIconWidth()
                  - insets.right
                  + (UIUtil.isUnderNimbusLookAndFeel() ? -3 : 2);
        }
      }
      if (UIUtil.isUnderDarcula()) {
        g.setXORMode(new Color(208, 188, 159));
      }
      icon.paintIcon(null, g, x, (size.height - icon.getIconHeight()) / 2);
      g.setPaintMode();
    }
 public void navigate(int injectedOffset) {
   if (myAction.isShowInBalloon()) {
     final JComponent component = myAction.createBalloonComponent(myNewFile);
     if (component != null) {
       final Balloon balloon =
           JBPopupFactory.getInstance()
               .createBalloonBuilder(component)
               .setShadow(true)
               .setAnimationCycle(0)
               .setHideOnClickOutside(true)
               .setHideOnKeyOutside(true)
               .setHideOnAction(false)
               .setFillColor(UIUtil.getControlColor())
               .createBalloon();
       new AnAction() {
         @Override
         public void actionPerformed(AnActionEvent e) {
           balloon.hide();
         }
       }.registerCustomShortcutSet(CommonShortcuts.ESCAPE, component);
       Disposer.register(myNewFile.getProject(), balloon);
       final Balloon.Position position = QuickEditAction.getBalloonPosition(myEditor);
       RelativePoint point = JBPopupFactory.getInstance().guessBestPopupLocation(myEditor);
       if (position == Balloon.Position.above) {
         final Point p = point.getPoint();
         point =
             new RelativePoint(
                 point.getComponent(), new Point(p.x, p.y - myEditor.getLineHeight()));
       }
       balloon.show(point, position);
     }
   } else {
     final FileEditorManagerEx fileEditorManager = FileEditorManagerEx.getInstanceEx(myProject);
     final FileEditor[] editors = fileEditorManager.getEditors(myNewVirtualFile);
     if (editors.length == 0) {
       final EditorWindow curWindow = fileEditorManager.getCurrentWindow();
       mySplittedWindow =
           curWindow.split(SwingConstants.HORIZONTAL, false, myNewVirtualFile, true);
     }
     Editor editor =
         fileEditorManager.openTextEditor(
             new OpenFileDescriptor(myProject, myNewVirtualFile, injectedOffset), true);
     // fold missing values
     if (editor != null) {
       editor.putUserData(QuickEditAction.QUICK_EDIT_HANDLER, this);
       final FoldingModel foldingModel = editor.getFoldingModel();
       foldingModel.runBatchFoldingOperation(
           () -> {
             for (RangeMarker o :
                 ContainerUtil.reverse(((DocumentEx) myNewDocument).getGuardedBlocks())) {
               String replacement = o.getUserData(REPLACEMENT_KEY);
               if (StringUtil.isEmpty(replacement)) continue;
               FoldRegion region =
                   foldingModel.addFoldRegion(o.getStartOffset(), o.getEndOffset(), replacement);
               if (region != null) region.setExpanded(false);
             }
           });
     }
     SwingUtilities.invokeLater(
         () -> myEditor.getScrollingModel().scrollToCaret(ScrollType.MAKE_VISIBLE));
   }
 }