@Override
  public void apply() {
    initComponent();
    UISettings settings = UISettings.getInstance();
    int _fontSize = getIntValue(myComponent.myFontSizeCombo, settings.FONT_SIZE);
    int _presentationFontSize =
        getIntValue(myComponent.myPresentationModeFontSize, settings.PRESENTATION_MODE_FONT_SIZE);
    boolean shouldUpdateUI = false;
    String _fontFace = (String) myComponent.myFontCombo.getSelectedItem();
    LafManager lafManager = LafManager.getInstance();
    if (_fontSize != settings.FONT_SIZE || !settings.FONT_FACE.equals(_fontFace)) {
      settings.FONT_SIZE = _fontSize;
      settings.FONT_FACE = _fontFace;
      shouldUpdateUI = true;
    }

    if (_presentationFontSize != settings.PRESENTATION_MODE_FONT_SIZE) {
      settings.PRESENTATION_MODE_FONT_SIZE = _presentationFontSize;
      shouldUpdateUI = true;
    }

    if (!myComponent.myAntialiasingInIDE.getSelectedItem().equals(settings.IDE_AA_TYPE)) {
      settings.IDE_AA_TYPE = (AntialiasingType) myComponent.myAntialiasingInIDE.getSelectedItem();
      shouldUpdateUI = true;
    }

    if (!myComponent.myAntialiasingInEditor.getSelectedItem().equals(settings.EDITOR_AA_TYPE)) {
      settings.EDITOR_AA_TYPE =
          (AntialiasingType) myComponent.myAntialiasingInEditor.getSelectedItem();
      shouldUpdateUI = true;
    }

    settings.ANIMATE_WINDOWS = myComponent.myAnimateWindowsCheckBox.isSelected();
    boolean update =
        settings.SHOW_TOOL_WINDOW_NUMBERS != myComponent.myWindowShortcutsCheckBox.isSelected();
    settings.SHOW_TOOL_WINDOW_NUMBERS = myComponent.myWindowShortcutsCheckBox.isSelected();
    update |= settings.HIDE_TOOL_STRIPES != !myComponent.myShowToolStripesCheckBox.isSelected();
    settings.HIDE_TOOL_STRIPES = !myComponent.myShowToolStripesCheckBox.isSelected();
    update |= settings.SHOW_ICONS_IN_MENUS != myComponent.myCbDisplayIconsInMenu.isSelected();
    settings.SHOW_ICONS_IN_MENUS = myComponent.myCbDisplayIconsInMenu.isSelected();
    update |=
        settings.SHOW_MEMORY_INDICATOR != myComponent.myShowMemoryIndicatorCheckBox.isSelected();
    settings.SHOW_MEMORY_INDICATOR = myComponent.myShowMemoryIndicatorCheckBox.isSelected();
    update |= settings.ALLOW_MERGE_BUTTONS != myComponent.myAllowMergeButtons.isSelected();
    settings.ALLOW_MERGE_BUTTONS = myComponent.myAllowMergeButtons.isSelected();
    update |= settings.CYCLE_SCROLLING != myComponent.myCycleScrollingCheckBox.isSelected();
    settings.CYCLE_SCROLLING = myComponent.myCycleScrollingCheckBox.isSelected();
    if (settings.OVERRIDE_NONIDEA_LAF_FONTS != myComponent.myOverrideLAFFonts.isSelected()) {
      shouldUpdateUI = true;
    }
    settings.OVERRIDE_NONIDEA_LAF_FONTS = myComponent.myOverrideLAFFonts.isSelected();
    settings.MOVE_MOUSE_ON_DEFAULT_BUTTON =
        myComponent.myMoveMouseOnDefaultButtonCheckBox.isSelected();
    settings.HIDE_NAVIGATION_ON_FOCUS_LOSS =
        myComponent.myHideNavigationPopupsCheckBox.isSelected();
    settings.DND_WITH_PRESSED_ALT_ONLY = myComponent.myAltDNDCheckBox.isSelected();

    update |= settings.DISABLE_MNEMONICS != myComponent.myDisableMnemonics.isSelected();
    settings.DISABLE_MNEMONICS = myComponent.myDisableMnemonics.isSelected();

    update |= settings.USE_SMALL_LABELS_ON_TABS != myComponent.myUseSmallLabelsOnTabs.isSelected();
    settings.USE_SMALL_LABELS_ON_TABS = myComponent.myUseSmallLabelsOnTabs.isSelected();

    update |= settings.WIDESCREEN_SUPPORT != myComponent.myWidescreenLayoutCheckBox.isSelected();
    settings.WIDESCREEN_SUPPORT = myComponent.myWidescreenLayoutCheckBox.isSelected();

    update |= settings.LEFT_HORIZONTAL_SPLIT != myComponent.myLeftLayoutCheckBox.isSelected();
    settings.LEFT_HORIZONTAL_SPLIT = myComponent.myLeftLayoutCheckBox.isSelected();

    update |= settings.RIGHT_HORIZONTAL_SPLIT != myComponent.myRightLayoutCheckBox.isSelected();
    settings.RIGHT_HORIZONTAL_SPLIT = myComponent.myRightLayoutCheckBox.isSelected();

    update |=
        settings.NAVIGATE_TO_PREVIEW
            != (myComponent.myNavigateToPreviewCheckBox.isVisible()
                && myComponent.myNavigateToPreviewCheckBox.isSelected());
    settings.NAVIGATE_TO_PREVIEW = myComponent.myNavigateToPreviewCheckBox.isSelected();

    ColorBlindness blindness = myComponent.myColorBlindnessPanel.getColorBlindness();
    boolean updateEditorScheme = false;
    if (settings.COLOR_BLINDNESS != blindness) {
      settings.COLOR_BLINDNESS = blindness;
      update = true;
      ComponentsPackage.getStateStore(ApplicationManager.getApplication())
          .reloadState(DefaultColorSchemesManager.class);
      updateEditorScheme = true;
    }

    update |=
        settings.DISABLE_MNEMONICS_IN_CONTROLS
            != myComponent.myDisableMnemonicInControlsCheckBox.isSelected();
    settings.DISABLE_MNEMONICS_IN_CONTROLS =
        myComponent.myDisableMnemonicInControlsCheckBox.isSelected();

    update |=
        settings.SHOW_ICONS_IN_QUICK_NAVIGATION
            != myComponent.myHideIconsInQuickNavigation.isSelected();
    settings.SHOW_ICONS_IN_QUICK_NAVIGATION = myComponent.myHideIconsInQuickNavigation.isSelected();

    if (!Comparing.equal(
        myComponent.myLafComboBox.getSelectedItem(), lafManager.getCurrentLookAndFeel())) {
      final UIManager.LookAndFeelInfo lafInfo =
          (UIManager.LookAndFeelInfo) myComponent.myLafComboBox.getSelectedItem();
      if (lafManager.checkLookAndFeel(lafInfo)) {
        update = shouldUpdateUI = true;
        final boolean wasDarcula = UIUtil.isUnderDarcula();
        lafManager.setCurrentLookAndFeel(lafInfo);
        //noinspection SSBasedInspection
        SwingUtilities.invokeLater(
            new Runnable() {
              @Override
              public void run() {
                if (UIUtil.isUnderDarcula()) {
                  DarculaInstaller.install();
                } else if (wasDarcula) {
                  DarculaInstaller.uninstall();
                }
              }
            });
      }
    }

    if (shouldUpdateUI) {
      lafManager.updateUI();
    }

    if (WindowManagerEx.getInstanceEx().isAlphaModeSupported()) {
      int delay = -1;
      try {
        delay = Integer.parseInt(myComponent.myAlphaModeDelayTextField.getText());
      } catch (NumberFormatException ignored) {
      }
      float ratio = myComponent.myAlphaModeRatioSlider.getValue() / 100f;
      if (myComponent.myEnableAlphaModeCheckBox.isSelected() != settings.ENABLE_ALPHA_MODE
          || delay != -1 && delay != settings.ALPHA_MODE_DELAY
          || ratio != settings.ALPHA_MODE_RATIO) {
        update = true;
        settings.ENABLE_ALPHA_MODE = myComponent.myEnableAlphaModeCheckBox.isSelected();
        settings.ALPHA_MODE_DELAY = delay;
        settings.ALPHA_MODE_RATIO = ratio;
      }
    }
    int tooltipDelay = Math.min(myComponent.myInitialTooltipDelaySlider.getValue(), 5000);
    if (tooltipDelay != Registry.intValue("ide.tooltip.initialDelay")) {
      update = true;
      Registry.get("ide.tooltip.initialDelay").setValue(tooltipDelay);
    }

    if (update) {
      settings.fireUISettingsChanged();
    }
    myComponent.updateCombo();

    EditorUtil.reinitSettings();

    if (updateEditorScheme) {
      EditorColorsManagerImpl.schemeChangedOrSwitched();
    }
  }