Rewrite sidebar to TreeView

sampler/src/main/java/atlantafx/sampler/Launcher.java

@@ -28,7 +28,6 @@ import javafx.scene.SceneAntialiasing;
 import javafx.scene.image.Image;
 import javafx.scene.input.KeyCode;
 import javafx.scene.input.KeyCodeCombination;
-import javafx.scene.input.KeyCombination;
 import javafx.scene.input.KeyEvent;
 import javafx.stage.Stage;
 
@@ -39,7 +38,7 @@ public class Launcher extends Application {
     );
 
     public static final List<KeyCodeCombination> SUPPORTED_HOTKEYS = List.of(
-        new KeyCodeCombination(KeyCode.F, KeyCombination.CONTROL_DOWN)
+        new KeyCodeCombination(KeyCode.SLASH)
     );
 
     public static void main(String[] args) {

sampler/src/main/java/atlantafx/sampler/layout/HeaderBar.java

@@ -8,26 +8,30 @@ import static atlantafx.base.theme.Styles.TITLE_4;
 import static atlantafx.sampler.Launcher.IS_DEV_MODE;
 import static atlantafx.sampler.layout.MainLayer.SIDEBAR_WIDTH;
 
-import atlantafx.base.controls.CustomTextField;
 import atlantafx.base.controls.Spacer;
 import atlantafx.sampler.Resources;
 import atlantafx.sampler.event.BrowseEvent;
 import atlantafx.sampler.event.DefaultEventBus;
 import atlantafx.sampler.event.HotkeyEvent;
 import java.net.URI;
+import java.util.Objects;
 import java.util.function.Consumer;
+import javafx.application.Platform;
 import javafx.beans.binding.Bindings;
+import javafx.geometry.HPos;
 import javafx.geometry.Insets;
 import javafx.geometry.Pos;
 import javafx.scene.Node;
+import javafx.scene.control.Button;
+import javafx.scene.control.ContentDisplay;
 import javafx.scene.control.Label;
 import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 import javafx.scene.input.KeyCode;
-import javafx.scene.input.KeyCombination.ModifierValue;
 import javafx.scene.layout.HBox;
 import javafx.scene.layout.Region;
 import javafx.scene.layout.StackPane;
+import javafx.scene.text.Text;
 import org.kordamp.ikonli.Ikon;
 import org.kordamp.ikonli.feather.Feather;
 import org.kordamp.ikonli.javafx.FontIcon;
@@ -42,10 +46,14 @@ class HeaderBar extends HBox {
 
     private final MainModel model;
     private Consumer<Node> quickConfigActionHandler;
+    private Overlay overlay;
+    private SearchDialog searchDialog;
 
     public HeaderBar(MainModel model) {
         super();
+
         this.model = model;
+
         createView();
     }
 
@@ -80,14 +88,24 @@ class HeaderBar extends HBox {
         titleLabel.getStyleClass().addAll("page-title", TITLE_4);
         titleLabel.textProperty().bind(model.titleProperty());
 
-        var searchField = new CustomTextField();
+        var searchBox = new HBox(10,
-        searchField.setLeft(new FontIcon(Material2MZ.SEARCH));
+            new FontIcon(Material2MZ.SEARCH),
-        searchField.setPromptText("Search");
+            new Text("Search"),
-        model.searchTextProperty().bind(searchField.textProperty());
+            new Spacer(5),
+            new Label("/")
+        );
+        searchBox.getStyleClass().add("box");
+        searchBox.setAlignment(Pos.CENTER_LEFT);
+
+        var searchButton = new Button();
+        searchButton.setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
+        searchButton.getStyleClass().add("search-button");
+        searchButton.setGraphic(searchBox);
+        searchButton.setOnAction(e -> openSearchDialog());
 
         DefaultEventBus.getInstance().subscribe(HotkeyEvent.class, e -> {
-            if (e.getKeys().getControl() == ModifierValue.DOWN && e.getKeys().getCode() == KeyCode.F) {
+            if (e.getKeys().getCode() == KeyCode.SLASH) {
-                searchField.requestFocus();
+                openSearchDialog();
             }
         });
 
@@ -139,7 +157,7 @@ class HeaderBar extends HBox {
             logoBox,
             titleLabel,
             new Spacer(),
-            searchField,
+            searchButton,
             popoverAnchor,
             quickConfigBtn,
             sourceCodeBtn,
@@ -156,4 +174,26 @@ class HeaderBar extends HBox {
     void setQuickConfigActionHandler(Consumer<Node> handler) {
         this.quickConfigActionHandler = handler;
     }
+
+    private Overlay lookupOverlay() {
+        return Objects.requireNonNullElse(overlay,
+            overlay = getScene() != null && getScene().lookup("." + Overlay.STYLE_CLASS) instanceof Overlay o ? o : null
+        );
+    }
+
+    private void openSearchDialog() {
+        if (searchDialog == null) {
+            searchDialog = new SearchDialog(model);
+            searchDialog.setOnCloseRequest(() -> {
+                var overlay = lookupOverlay();
+                overlay.removeContent();
+                overlay.toBack();
+            });
+        }
+
+        var overlay = lookupOverlay();
+        overlay.setContent(searchDialog, HPos.CENTER);
+        overlay.toFront();
+        Platform.runLater(() -> searchDialog.begForFocus());
+    }
 }

sampler/src/main/java/atlantafx/sampler/layout/MainLayer.java

@@ -12,7 +12,6 @@ import atlantafx.sampler.layout.MainModel.SubLayer;
 import atlantafx.sampler.page.CodeViewer;
 import atlantafx.sampler.page.Page;
 import atlantafx.sampler.page.QuickConfigMenu;
-import atlantafx.sampler.page.components.OverviewPage;
 import atlantafx.sampler.theme.ThemeManager;
 import java.io.IOException;
 import java.util.Objects;
@@ -27,7 +26,7 @@ import javafx.util.Duration;
 
 class MainLayer extends BorderPane {
 
-    static final int SIDEBAR_WIDTH = 220;
+    static final int SIDEBAR_WIDTH = 250;
     static final int PAGE_TRANSITION_DURATION = 500; // ms
 
     private final MainModel model = new MainModel();
@@ -45,13 +44,15 @@ class MainLayer extends BorderPane {
         createView();
         initListeners();
 
-        model.navigate(OverviewPage.class);
+        model.navigate(MainModel.DEFAULT_PAGE);
+
         // keyboard navigation won't work without focus
         Platform.runLater(sidebar::begForFocus);
     }
 
     private void createView() {
         sidebar.setMinWidth(SIDEBAR_WIDTH);
+        sidebar.setMaxWidth(SIDEBAR_WIDTH);
 
         codeViewer = new CodeViewer();
 

sampler/src/main/java/atlantafx/sampler/layout/MainModel.java

@@ -6,6 +6,52 @@ import static atlantafx.sampler.layout.MainModel.SubLayer.PAGE;
 import static atlantafx.sampler.layout.MainModel.SubLayer.SOURCE_CODE;
 
 import atlantafx.sampler.page.Page;
+import atlantafx.sampler.page.components.AccordionPage;
+import atlantafx.sampler.page.components.BreadcrumbsPage;
+import atlantafx.sampler.page.components.ButtonPage;
+import atlantafx.sampler.page.components.ChartPage;
+import atlantafx.sampler.page.components.CheckBoxPage;
+import atlantafx.sampler.page.components.ColorPickerPage;
+import atlantafx.sampler.page.components.ComboBoxPage;
+import atlantafx.sampler.page.components.CustomTextFieldPage;
+import atlantafx.sampler.page.components.DatePickerPage;
+import atlantafx.sampler.page.components.DialogPage;
+import atlantafx.sampler.page.components.HtmlEditorPage;
+import atlantafx.sampler.page.components.InputGroupPage;
+import atlantafx.sampler.page.components.LabelPage;
+import atlantafx.sampler.page.components.ListPage;
+import atlantafx.sampler.page.components.MenuButtonPage;
+import atlantafx.sampler.page.components.MenuPage;
+import atlantafx.sampler.page.components.OverviewPage;
+import atlantafx.sampler.page.components.PaginationPage;
+import atlantafx.sampler.page.components.PopoverPage;
+import atlantafx.sampler.page.components.ProgressPage;
+import atlantafx.sampler.page.components.RadioButtonPage;
+import atlantafx.sampler.page.components.ScrollPanePage;
+import atlantafx.sampler.page.components.SeparatorPage;
+import atlantafx.sampler.page.components.SliderPage;
+import atlantafx.sampler.page.components.SpinnerPage;
+import atlantafx.sampler.page.components.SplitPanePage;
+import atlantafx.sampler.page.components.TabPanePage;
+import atlantafx.sampler.page.components.TablePage;
+import atlantafx.sampler.page.components.TextAreaPage;
+import atlantafx.sampler.page.components.TextFieldPage;
+import atlantafx.sampler.page.components.TitledPanePage;
+import atlantafx.sampler.page.components.ToggleButtonPage;
+import atlantafx.sampler.page.components.ToggleSwitchPage;
+import atlantafx.sampler.page.components.ToolBarPage;
+import atlantafx.sampler.page.components.TooltipPage;
+import atlantafx.sampler.page.components.TreePage;
+import atlantafx.sampler.page.components.TreeTablePage;
+import atlantafx.sampler.page.general.IconsPage;
+import atlantafx.sampler.page.general.ThemePage;
+import atlantafx.sampler.page.general.TypographyPage;
+import atlantafx.sampler.page.showcase.filemanager.FileManagerPage;
+import atlantafx.sampler.page.showcase.musicplayer.MusicPlayerPage;
+import atlantafx.sampler.page.showcase.widget.WidgetCollectionPage;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import javafx.beans.property.ReadOnlyBooleanProperty;
 import javafx.beans.property.ReadOnlyBooleanWrapper;
@@ -15,49 +61,221 @@ import javafx.beans.property.ReadOnlyStringProperty;
 import javafx.beans.property.ReadOnlyStringWrapper;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
+import org.kordamp.ikonli.javafx.FontIcon;
+import org.kordamp.ikonli.material2.Material2OutlinedAL;
+import org.kordamp.ikonli.material2.Material2OutlinedMZ;
 
 public class MainModel {
 
+    public static Class<? extends Page> DEFAULT_PAGE = OverviewPage.class;
+
+    private static final Map<Class<? extends Page>, NavTree.Item> NAV_TREE = createNavItems();
+
     public enum SubLayer {
         PAGE,
         SOURCE_CODE
     }
 
-    private final ReadOnlyStringWrapper title = new ReadOnlyStringWrapper();
+    NavTree.Item getTreeItemForPage(Class<? extends Page> pageClass) {
-    private final StringProperty searchText = new SimpleStringProperty();
+        return NAV_TREE.getOrDefault(pageClass, NAV_TREE.get(DEFAULT_PAGE));
-    private final ReadOnlyObjectWrapper<Class<? extends Page>> selectedPage = new ReadOnlyObjectWrapper<>();
+    }
-    private final ReadOnlyBooleanWrapper themeChangeToggle = new ReadOnlyBooleanWrapper();
+
-    private final ReadOnlyBooleanWrapper sourceCodeToggle = new ReadOnlyBooleanWrapper();
+    List<NavTree.Item> findPages(String filter) {
-    private final ReadOnlyObjectWrapper<SubLayer> currentSubLayer = new ReadOnlyObjectWrapper<>(PAGE);
+        return NAV_TREE.values().stream()
+            .filter(item -> item.getValue() != null && item.getValue().matches(filter))
+            .toList();
+    }
 
     ///////////////////////////////////////////////////////////////////////////
     // Properties                                                            //
     ///////////////////////////////////////////////////////////////////////////
 
+    private final StringProperty searchText = new SimpleStringProperty();
+
     public StringProperty searchTextProperty() {
         return searchText;
     }
 
+    // ~
+    private final ReadOnlyStringWrapper title = new ReadOnlyStringWrapper();
+
     public ReadOnlyStringProperty titleProperty() {
         return title.getReadOnlyProperty();
     }
 
+    // ~
+    private final ReadOnlyBooleanWrapper themeChangeToggle = new ReadOnlyBooleanWrapper();
+
     public ReadOnlyBooleanProperty themeChangeToggleProperty() {
         return themeChangeToggle.getReadOnlyProperty();
     }
 
+    // ~
+    private final ReadOnlyBooleanWrapper sourceCodeToggle = new ReadOnlyBooleanWrapper();
+
     public ReadOnlyBooleanProperty sourceCodeToggleProperty() {
         return sourceCodeToggle.getReadOnlyProperty();
     }
 
+    // ~
+    private final ReadOnlyObjectWrapper<Class<? extends Page>> selectedPage = new ReadOnlyObjectWrapper<>();
+
     public ReadOnlyObjectProperty<Class<? extends Page>> selectedPageProperty() {
         return selectedPage.getReadOnlyProperty();
     }
 
+    // ~
+    private final ReadOnlyObjectWrapper<SubLayer> currentSubLayer = new ReadOnlyObjectWrapper<>(PAGE);
+
     public ReadOnlyObjectProperty<SubLayer> currentSubLayerProperty() {
         return currentSubLayer.getReadOnlyProperty();
     }
 
+    // ~
+    private final ReadOnlyObjectWrapper<NavTree.Item> navTree = new ReadOnlyObjectWrapper<>(createTree());
+
+    public ReadOnlyObjectProperty<NavTree.Item> navTreeProperty() {
+        return navTree.getReadOnlyProperty();
+    }
+
+    private NavTree.Item createTree() {
+        var general = NavTree.Item.group("General", new FontIcon(Material2OutlinedAL.ARTICLE));
+        general.getChildren().setAll(
+            NAV_TREE.get(OverviewPage.class),
+            NAV_TREE.get(ThemePage.class),
+            NAV_TREE.get(TypographyPage.class),
+            NAV_TREE.get(IconsPage.class)
+        );
+        general.setExpanded(true);
+
+        var components = NavTree.Item.group("Standard Controls", new FontIcon(Material2OutlinedAL.DASHBOARD));
+        components.getChildren().setAll(
+            NAV_TREE.get(AccordionPage.class),
+            NAV_TREE.get(ButtonPage.class),
+            NAV_TREE.get(ChartPage.class),
+            NAV_TREE.get(CheckBoxPage.class),
+            NAV_TREE.get(ColorPickerPage.class),
+            NAV_TREE.get(ComboBoxPage.class),
+            NAV_TREE.get(DatePickerPage.class),
+            NAV_TREE.get(DialogPage.class),
+            NAV_TREE.get(HtmlEditorPage.class),
+            NAV_TREE.get(LabelPage.class),
+            NAV_TREE.get(ListPage.class),
+            NAV_TREE.get(MenuPage.class),
+            NAV_TREE.get(MenuButtonPage.class),
+            NAV_TREE.get(PaginationPage.class),
+            NAV_TREE.get(ProgressPage.class),
+            NAV_TREE.get(RadioButtonPage.class),
+            NAV_TREE.get(ScrollPanePage.class),
+            NAV_TREE.get(SeparatorPage.class),
+            NAV_TREE.get(SliderPage.class),
+            NAV_TREE.get(SpinnerPage.class),
+            NAV_TREE.get(SplitPanePage.class),
+            NAV_TREE.get(TablePage.class),
+            NAV_TREE.get(TabPanePage.class),
+            NAV_TREE.get(TextAreaPage.class),
+            NAV_TREE.get(TextFieldPage.class),
+            NAV_TREE.get(TitledPanePage.class),
+            NAV_TREE.get(ToggleButtonPage.class),
+            NAV_TREE.get(ToolBarPage.class),
+            NAV_TREE.get(TooltipPage.class),
+            NAV_TREE.get(TreePage.class),
+            NAV_TREE.get(TreeTablePage.class)
+        );
+
+        var extras = NavTree.Item.group("Extras", new FontIcon(Material2OutlinedMZ.TOGGLE_ON));
+        extras.getChildren().setAll(
+            NAV_TREE.get(InputGroupPage.class),
+            NAV_TREE.get(BreadcrumbsPage.class),
+            NAV_TREE.get(CustomTextFieldPage.class),
+            NAV_TREE.get(PopoverPage.class),
+            NAV_TREE.get(ToggleSwitchPage.class)
+        );
+
+        var showcases = NavTree.Item.group("Showcase", new FontIcon(Material2OutlinedMZ.VISIBILITY));
+        showcases.getChildren().setAll(
+            NAV_TREE.get(FileManagerPage.class),
+            NAV_TREE.get(MusicPlayerPage.class),
+            NAV_TREE.get(WidgetCollectionPage.class)
+        );
+
+        var root = NavTree.Item.root();
+        root.getChildren().setAll(general, components, extras, showcases);
+
+        return root;
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Nav Tree                                                              //
+    ///////////////////////////////////////////////////////////////////////////
+
+    public static Map<Class<? extends Page>, NavTree.Item> createNavItems() {
+        var map = new HashMap<Class<? extends Page>, NavTree.Item>();
+
+        map.put(OverviewPage.class, NavTree.Item.page(OverviewPage.NAME, OverviewPage.class));
+        map.put(ThemePage.class, NavTree.Item.page(ThemePage.NAME, ThemePage.class));
+        map.put(TypographyPage.class, NavTree.Item.page(TypographyPage.NAME, TypographyPage.class));
+        map.put(IconsPage.class, NavTree.Item.page(IconsPage.NAME, IconsPage.class));
+
+        map.put(InputGroupPage.class, NavTree.Item.page(InputGroupPage.NAME, InputGroupPage.class));
+        map.put(AccordionPage.class, NavTree.Item.page(AccordionPage.NAME, AccordionPage.class));
+        map.put(BreadcrumbsPage.class, NavTree.Item.page(BreadcrumbsPage.NAME, BreadcrumbsPage.class));
+        map.put(ButtonPage.class, NavTree.Item.page(ButtonPage.NAME, ButtonPage.class));
+        map.put(ChartPage.class, NavTree.Item.page(ChartPage.NAME, ChartPage.class));
+        map.put(CheckBoxPage.class, NavTree.Item.page(CheckBoxPage.NAME, CheckBoxPage.class));
+        map.put(ColorPickerPage.class, NavTree.Item.page(ColorPickerPage.NAME, ColorPickerPage.class));
+        map.put(
+            ComboBoxPage.class,
+            NavTree.Item.page(ComboBoxPage.NAME, ComboBoxPage.class, "ChoiceBox")
+        );
+        map.put(
+            CustomTextFieldPage.class,
+            NavTree.Item.page(CustomTextFieldPage.NAME, CustomTextFieldPage.class, "MaskTextField", "PasswordTextField")
+        );
+        map.put(DatePickerPage.class, NavTree.Item.page(DatePickerPage.NAME, DatePickerPage.class));
+        map.put(DialogPage.class, NavTree.Item.page(DialogPage.NAME, DialogPage.class));
+        map.put(HtmlEditorPage.class, NavTree.Item.page(HtmlEditorPage.NAME, HtmlEditorPage.class));
+        map.put(LabelPage.class, NavTree.Item.page(LabelPage.NAME, LabelPage.class));
+        map.put(ListPage.class, NavTree.Item.page(ListPage.NAME, ListPage.class));
+        map.put(MenuPage.class, NavTree.Item.page(MenuPage.NAME, MenuPage.class));
+        map.put(MenuButtonPage.class, NavTree.Item.page(
+            MenuButtonPage.NAME,
+            MenuButtonPage.class, "SplitMenuButton")
+        );
+        map.put(PaginationPage.class, NavTree.Item.page(PaginationPage.NAME, PaginationPage.class));
+        map.put(PopoverPage.class, NavTree.Item.page(PopoverPage.NAME, PopoverPage.class));
+        map.put(ProgressPage.class, NavTree.Item.page(ProgressPage.NAME, ProgressPage.class));
+        map.put(RadioButtonPage.class, NavTree.Item.page(RadioButtonPage.NAME, RadioButtonPage.class));
+        map.put(ScrollPanePage.class, NavTree.Item.page(ScrollPanePage.NAME, ScrollPanePage.class));
+        map.put(SeparatorPage.class, NavTree.Item.page(SeparatorPage.NAME, SeparatorPage.class));
+        map.put(SliderPage.class, NavTree.Item.page(SliderPage.NAME, SliderPage.class));
+        map.put(SpinnerPage.class, NavTree.Item.page(SpinnerPage.NAME, SpinnerPage.class));
+        map.put(SplitPanePage.class, NavTree.Item.page(SplitPanePage.NAME, SplitPanePage.class));
+        map.put(TablePage.class, NavTree.Item.page(TablePage.NAME, TablePage.class));
+        map.put(TabPanePage.class, NavTree.Item.page(TabPanePage.NAME, TabPanePage.class));
+        map.put(TextAreaPage.class, NavTree.Item.page(TextAreaPage.NAME, TextAreaPage.class));
+        map.put(TextFieldPage.class, NavTree.Item.page(
+            TextFieldPage.NAME,
+            TextFieldPage.class, "PasswordField")
+        );
+        map.put(TitledPanePage.class, NavTree.Item.page(TitledPanePage.NAME, TitledPanePage.class));
+        map.put(ToggleButtonPage.class, NavTree.Item.page(ToggleButtonPage.NAME, ToggleButtonPage.class));
+        map.put(ToggleSwitchPage.class, NavTree.Item.page(ToggleSwitchPage.NAME, ToggleSwitchPage.class));
+        map.put(ToolBarPage.class, NavTree.Item.page(ToolBarPage.NAME, ToolBarPage.class));
+        map.put(TooltipPage.class, NavTree.Item.page(TooltipPage.NAME, TooltipPage.class));
+        map.put(TreePage.class, NavTree.Item.page(TreePage.NAME, TreePage.class));
+        map.put(TreeTablePage.class, NavTree.Item.page(TreeTablePage.NAME, TreeTablePage.class));
+
+        map.put(FileManagerPage.class, NavTree.Item.page(FileManagerPage.NAME, FileManagerPage.class));
+        map.put(MusicPlayerPage.class, NavTree.Item.page(FileManagerPage.NAME, MusicPlayerPage.class));
+        map.put(WidgetCollectionPage.class, NavTree.Item.page(
+            FileManagerPage.NAME,
+            WidgetCollectionPage.class, "Card", "Message", "Stepper", "Tag")
+        );
+
+        return map;
+    }
+
     ///////////////////////////////////////////////////////////////////////////
     // Commands                                                              //
     ///////////////////////////////////////////////////////////////////////////

sampler/src/main/java/atlantafx/sampler/layout/Nav.java

@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: MIT */
+
+package atlantafx.sampler.layout;
+
+import atlantafx.sampler.page.Page;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import javafx.scene.Node;
+import org.jetbrains.annotations.Nullable;
+
+public record Nav(String title,
+                  @Nullable Node graphic,
+                  @Nullable Class<? extends Page> pageClass,
+                  @Nullable List<String> searchKeywords) {
+
+    public static final Nav ROOT = new Nav("ROOT", null, null, null);
+
+    public Nav {
+        Objects.requireNonNull(title, "title");
+        searchKeywords = Objects.requireNonNullElse(searchKeywords, Collections.emptyList());
+    }
+
+    public boolean isGroup() {
+        return pageClass == null;
+    }
+
+    public boolean matches(String filter) {
+        Objects.requireNonNull(filter);
+        return contains(title, filter)
+            || (searchKeywords != null && searchKeywords.stream().anyMatch(keyword -> contains(keyword, filter)));
+    }
+
+    private boolean contains(String text, String filter) {
+        return text.toLowerCase().contains(filter.toLowerCase());
+    }
+}

sampler/src/main/java/atlantafx/sampler/layout/NavTree.java

@@ -0,0 +1,143 @@
+/* SPDX-License-Identifier: MIT */
+
+package atlantafx.sampler.layout;
+
+import atlantafx.base.controls.Spacer;
+import atlantafx.sampler.page.Page;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import javafx.css.PseudoClass;
+import javafx.geometry.Pos;
+import javafx.scene.Cursor;
+import javafx.scene.Node;
+import javafx.scene.control.Label;
+import javafx.scene.control.TreeCell;
+import javafx.scene.control.TreeItem;
+import javafx.scene.control.TreeView;
+import javafx.scene.input.MouseButton;
+import javafx.scene.layout.HBox;
+import org.jetbrains.annotations.Nullable;
+import org.kordamp.ikonli.javafx.FontIcon;
+
+public class NavTree extends TreeView<Nav> {
+
+    public NavTree(MainModel model) {
+        super();
+
+        getSelectionModel().selectedItemProperty().addListener((obs, old, val) -> {
+            if (!(val instanceof Item item)) {
+                return;
+            }
+
+            if (!item.isGroup()) {
+                model.navigate(item.pageClass());
+            }
+        });
+
+        setShowRoot(false);
+        rootProperty().bind(model.navTreeProperty());
+        setCellFactory(p -> new NavTreeCell());
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    public static final class NavTreeCell extends TreeCell<Nav> {
+
+        private static final PseudoClass GROUP = PseudoClass.getPseudoClass("group");
+
+        private final HBox root;
+        private final Label titleLabel;
+        private final Node arrowIcon;
+
+        public NavTreeCell() {
+            super();
+
+            titleLabel = new Label();
+            titleLabel.setGraphicTextGap(10);
+            titleLabel.getStyleClass().add("title");
+
+            arrowIcon = new FontIcon();
+            arrowIcon.getStyleClass().add("arrow");
+
+            root = new HBox();
+            root.setAlignment(Pos.CENTER_LEFT);
+            root.getChildren().setAll(titleLabel, new Spacer(), arrowIcon);
+            root.setCursor(Cursor.HAND);
+            root.getStyleClass().add("container");
+            root.setMaxWidth(MainLayer.SIDEBAR_WIDTH - 10);
+
+            root.setOnMouseClicked(e -> {
+                if (!(getTreeItem() instanceof Item item)) {
+                    return;
+                }
+
+                if (item.isGroup() && e.getButton() == MouseButton.PRIMARY) {
+                    item.setExpanded(!item.isExpanded());
+                    // scroll slightly above the target
+                    getTreeView().scrollTo(getTreeView().getRow(item) - 10);
+                }
+            });
+
+            getStyleClass().add("nav-tree-cell");
+        }
+
+        @Override
+        protected void updateItem(Nav nav, boolean empty) {
+            super.updateItem(nav, empty);
+
+            if (nav == null || empty) {
+                setGraphic(null);
+                titleLabel.setText(null);
+                titleLabel.setGraphic(null);
+            } else {
+                setGraphic(root);
+
+                titleLabel.setText(nav.title());
+                titleLabel.setGraphic(nav.graphic());
+
+                pseudoClassStateChanged(GROUP, nav.isGroup());
+                arrowIcon.setVisible(nav.isGroup());
+            }
+        }
+    }
+
+    public static final class Item extends TreeItem<Nav> {
+
+        private final Nav nav;
+
+        private Item(Nav nav) {
+            this.nav = Objects.requireNonNull(nav, "nav");
+            setValue(nav);
+        }
+
+        public boolean isGroup() {
+            return nav.isGroup();
+        }
+
+        public @Nullable Class<? extends Page> pageClass() {
+            return nav.pageClass();
+        }
+
+        public static Item root() {
+            return new Item(Nav.ROOT);
+        }
+
+        public static Item group(String title, Node graphic) {
+            return new Item(new Nav(title, graphic, null, null));
+        }
+
+        public static Item page(String title,
+                                @Nullable Class<? extends Page> pageClass) {
+            Objects.requireNonNull(pageClass, "pageClass");
+            return new Item(new Nav(title, null, pageClass, Collections.emptyList()));
+        }
+
+        public static Item page(String title,
+                                @Nullable Class<? extends Page> pageClass,
+                                String... searchKeywords) {
+            Objects.requireNonNull(pageClass, "pageClass");
+            return new Item(new Nav(title, null, pageClass, List.of(searchKeywords)));
+        }
+    }
+}

sampler/src/main/java/atlantafx/sampler/layout/SearchDialog.java

@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: MIT */
+
+package atlantafx.sampler.layout;
+
+import atlantafx.base.controls.CustomTextField;
+import atlantafx.base.controls.Spacer;
+import atlantafx.base.theme.Styles;
+import atlantafx.base.theme.Tweaks;
+import atlantafx.sampler.page.OverlayDialog;
+import java.util.function.Consumer;
+import javafx.event.EventType;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.control.Label;
+import javafx.scene.control.ListCell;
+import javafx.scene.control.ListView;
+import javafx.scene.input.KeyCode;
+import javafx.scene.input.KeyEvent;
+import javafx.scene.input.MouseButton;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import org.kordamp.ikonli.javafx.FontIcon;
+import org.kordamp.ikonli.material2.Material2AL;
+import org.kordamp.ikonli.material2.Material2MZ;
+
+final class SearchDialog extends OverlayDialog<VBox> {
+
+    private final MainModel model;
+
+    private CustomTextField searchField;
+    private ListView<NavTree.Item> resultList;
+
+    public SearchDialog(MainModel model) {
+        super();
+
+        this.model = model;
+
+        setId("search-dialog");
+        setTitle("Search");
+        setContent(createContent());
+        init();
+    }
+
+    private VBox createContent() {
+        var placeholder = new Label("Your search results will appear here");
+        placeholder.getStyleClass().add(Styles.TITLE_4);
+
+        searchField = new CustomTextField();
+        searchField.setLeft(new FontIcon(Material2MZ.SEARCH));
+        VBox.setVgrow(searchField, Priority.NEVER);
+
+        Consumer<NavTree.Item> clickHandler = item -> {
+            if (item.pageClass() != null) {
+                close();
+                model.navigate(item.pageClass());
+            }
+        };
+
+        resultList = new ListView<>();
+        resultList.setPlaceholder(placeholder);
+        resultList.getStyleClass().add(Tweaks.EDGE_TO_EDGE);
+        resultList.setCellFactory(c -> new ResultListCell(clickHandler));
+        VBox.setVgrow(resultList, Priority.ALWAYS);
+
+        var content = new VBox(10, searchField, resultList);
+        content.setPadding(new Insets(10, 20, 10, 20));
+        content.setPrefSize(600, 440);
+
+        return content;
+    }
+
+    private void init() {
+        searchField.textProperty().addListener((obs, old, val) -> {
+            if (val == null || val.length() <= 2) {
+                resultList.getItems().clear();
+                return;
+            }
+
+            resultList.getItems().setAll(model.findPages(val));
+        });
+
+        searchField.addEventFilter(KeyEvent.KEY_RELEASED, e -> {
+            if (e.getCode() == KeyCode.DOWN && !resultList.getItems().isEmpty()) {
+                resultList.getSelectionModel().selectFirst();
+                resultList.requestFocus();
+            }
+        });
+
+        resultList.setOnKeyPressed(e -> {
+            var selectionModel = resultList.getSelectionModel();
+            if (e.getCode() == KeyCode.ENTER && !selectionModel.isEmpty()) {
+                close();
+                model.navigate(selectionModel.getSelectedItem().pageClass());
+            }
+        });
+    }
+
+    void begForFocus() {
+        searchField.requestFocus();
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+
+    public static final class ResultListCell extends ListCell<NavTree.Item> {
+
+        private final HBox root;
+        private final Label parentLabel;
+        private final Label targetLabel;
+
+        public ResultListCell(Consumer<NavTree.Item> clickHandler) {
+            super();
+
+            parentLabel = new Label();
+            parentLabel.getStyleClass().add(Styles.TEXT_MUTED);
+
+            var separatorIcon = new FontIcon(Material2AL.CHEVRON_RIGHT);
+            separatorIcon.getStyleClass().add("icon-subtle");
+
+            var returnIcon = new FontIcon(Material2AL.KEYBOARD_RETURN);
+            returnIcon.getStyleClass().add("icon-subtle");
+
+            targetLabel = new Label();
+            targetLabel.getStyleClass().add(Styles.TEXT_BOLD);
+
+            root = new HBox(parentLabel, separatorIcon, targetLabel, new Spacer(), returnIcon);
+            root.setAlignment(Pos.CENTER_LEFT);
+
+            setOnMouseClicked(e -> {
+                if (e.getButton() == MouseButton.PRIMARY && e.getClickCount() == 2) {
+                    clickHandler.accept(getItem());
+                }
+            });
+        }
+
+        @Override
+        protected void updateItem(NavTree.Item item, boolean empty) {
+            super.updateItem(item, empty);
+
+            if (item == null || empty) {
+                setGraphic(null);
+            } else {
+                parentLabel.setText(item.getParent().getValue().title());
+                targetLabel.setText(item.getValue().title());
+                setGraphic(root);
+            }
+        }
+    }
+}

sampler/src/main/java/atlantafx/sampler/layout/Sidebar.java

@@ -2,331 +2,34 @@
 
 package atlantafx.sampler.layout;
 
-import static javafx.scene.control.ScrollPane.ScrollBarPolicy.AS_NEEDED;
-import static javafx.scene.layout.Priority.ALWAYS;
-
-import atlantafx.base.controls.Spacer;
-import atlantafx.base.theme.Styles;
-import atlantafx.sampler.page.Page;
-import atlantafx.sampler.page.components.AccordionPage;
-import atlantafx.sampler.page.components.BreadcrumbsPage;
-import atlantafx.sampler.page.components.ButtonPage;
-import atlantafx.sampler.page.components.ChartPage;
-import atlantafx.sampler.page.components.CheckBoxPage;
-import atlantafx.sampler.page.components.ColorPickerPage;
-import atlantafx.sampler.page.components.ComboBoxPage;
-import atlantafx.sampler.page.components.CustomTextFieldPage;
-import atlantafx.sampler.page.components.DatePickerPage;
-import atlantafx.sampler.page.components.DialogPage;
-import atlantafx.sampler.page.components.HtmlEditorPage;
-import atlantafx.sampler.page.components.InputGroupPage;
-import atlantafx.sampler.page.components.LabelPage;
-import atlantafx.sampler.page.components.ListPage;
-import atlantafx.sampler.page.components.MenuButtonPage;
-import atlantafx.sampler.page.components.MenuPage;
-import atlantafx.sampler.page.components.OverviewPage;
-import atlantafx.sampler.page.components.PaginationPage;
-import atlantafx.sampler.page.components.PopoverPage;
-import atlantafx.sampler.page.components.ProgressPage;
-import atlantafx.sampler.page.components.RadioButtonPage;
-import atlantafx.sampler.page.components.ScrollPanePage;
-import atlantafx.sampler.page.components.SeparatorPage;
-import atlantafx.sampler.page.components.SliderPage;
-import atlantafx.sampler.page.components.SpinnerPage;
-import atlantafx.sampler.page.components.SplitPanePage;
-import atlantafx.sampler.page.components.TabPanePage;
-import atlantafx.sampler.page.components.TablePage;
-import atlantafx.sampler.page.components.TextAreaPage;
-import atlantafx.sampler.page.components.TextFieldPage;
-import atlantafx.sampler.page.components.TitledPanePage;
-import atlantafx.sampler.page.components.ToggleButtonPage;
-import atlantafx.sampler.page.components.ToggleSwitchPage;
-import atlantafx.sampler.page.components.ToolBarPage;
-import atlantafx.sampler.page.components.TooltipPage;
-import atlantafx.sampler.page.components.TreePage;
-import atlantafx.sampler.page.components.TreeTablePage;
-import atlantafx.sampler.page.general.IconsPage;
-import atlantafx.sampler.page.general.ThemePage;
-import atlantafx.sampler.page.general.TypographyPage;
-import atlantafx.sampler.page.showcase.filemanager.FileManagerPage;
-import atlantafx.sampler.page.showcase.musicplayer.MusicPlayerPage;
-import atlantafx.sampler.page.showcase.widget.WidgetCollectionPage;
-import atlantafx.sampler.util.Containers;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Optional;
-import java.util.function.Predicate;
-import javafx.beans.binding.Bindings;
-import javafx.collections.FXCollections;
-import javafx.collections.ListChangeListener;
-import javafx.collections.ObservableList;
-import javafx.collections.transformation.FilteredList;
-import javafx.css.PseudoClass;
-import javafx.geometry.Orientation;
-import javafx.scene.control.Label;
-import javafx.scene.control.ScrollPane;
-import javafx.scene.input.KeyCode;
-import javafx.scene.input.KeyEvent;
-import javafx.scene.layout.Region;
 import javafx.scene.layout.StackPane;
-import javafx.scene.layout.VBox;
 
-@SuppressWarnings("UnnecessaryLambda")
 class Sidebar extends StackPane {
 
-    private static final PseudoClass SELECTED = PseudoClass.getPseudoClass("selected");
-    private static final PseudoClass FILTERED = PseudoClass.getPseudoClass("filtered");
-    private static final Predicate<Region> PREDICATE_ANY = region -> true;
-
     private final MainModel model;
-    private final NavMenu navMenu;
+    private final NavTree navTree;
-    private ScrollPane navScroll;
 
     public Sidebar(MainModel model) {
         super();
 
         this.model = model;
-        this.navMenu = new NavMenu(model);
+        this.navTree = new NavTree(model);
 
         createView();
     }
 
     private void createView() {
-        var placeholder = new Label("No content");
-        placeholder.getStyleClass().add(Styles.TITLE_4);
-
-        var navContainer = new VBox();
-        navContainer.getStyleClass().add("nav-menu");
-        Bindings.bindContent(navContainer.getChildren(), navMenu.getContent());
-
-        navScroll = new ScrollPane(navContainer);
-        Containers.setScrollConstraints(navScroll, AS_NEEDED, true, AS_NEEDED, true);
-        VBox.setVgrow(navScroll, ALWAYS);
-
-        model.searchTextProperty().addListener((obs, old, val) -> {
-            var empty = val == null || val.isBlank();
-            pseudoClassStateChanged(FILTERED, !empty);
-            navMenu.setPredicate(empty ? PREDICATE_ANY : region -> region instanceof NavLink link && link.matches(val));
-        });
-
         model.selectedPageProperty().addListener((obs, old, val) -> {
-            navMenu.findLink(old).ifPresent(link -> link.pseudoClassStateChanged(SELECTED, false));
+            if (val != null) {
-            navMenu.findLink(val).ifPresent(link -> link.pseudoClassStateChanged(SELECTED, true));
+                navTree.getSelectionModel().select(model.getTreeItemForPage(val));
-        });
-
-        navScroll.addEventFilter(KeyEvent.KEY_PRESSED, e -> {
-            var offset = 1 / (navContainer.getHeight() - navScroll.getViewportBounds().getHeight());
-            if (e.getCode() == KeyCode.UP) {
-                navMenu.getPrevious().ifPresentOrElse(link -> {
-                    navScroll.setVvalue(link.getLayoutY() * offset / 2);
-                    model.navigate(link.getPageClass());
-                }, () -> navScroll.setVvalue(0));
-                e.consume();
-            }
-            if (e.getCode() == KeyCode.DOWN) {
-                navMenu.getNext().ifPresentOrElse(link -> {
-                    navScroll.setVvalue(link.getLayoutY() * offset / 2);
-                    model.navigate(link.getPageClass());
-                }, () -> navScroll.setVvalue(1.0));
-                e.consume();
-            }
-        });
-
-        navMenu.getContent().addListener((ListChangeListener<Region>) c -> {
-            if (navMenu.getContent().isEmpty()) {
-                placeholder.toFront();
-            } else {
-                placeholder.toBack();
             }
         });
 
         setId("sidebar");
-        getChildren().addAll(placeholder, navScroll);
+        getChildren().addAll(navTree);
     }
 
     void begForFocus() {
-        navScroll.requestFocus();
+        navTree.requestFocus();
-    }
-
-    ///////////////////////////////////////////////////////////////////////////
-
-    private static class NavMenu {
-
-        private final MainModel model;
-        private final FilteredList<Region> content;
-        private final Map<Class<? extends Page>, NavLink> registry = new HashMap<>();
-
-        public NavMenu(MainModel model) {
-            var links = create();
-
-            this.model = model;
-            this.content = new FilteredList<>(links);
-            links.forEach(c -> {
-                if (c instanceof NavLink link) {
-                    registry.put(link.getPageClass(), link);
-                }
-            });
-        }
-
-        public FilteredList<Region> getContent() {
-            return content;
-        }
-
-        public void setPredicate(Predicate<Region> predicate) {
-            content.setPredicate(predicate);
-        }
-
-        public Optional<NavLink> findLink(Class<? extends Page> pageClass) {
-            if (pageClass == null) {
-                return Optional.empty();
-            }
-            return Optional.ofNullable(registry.get(pageClass));
-        }
-
-        public Optional<NavLink> getPrevious() {
-            var current = content.indexOf(registry.get(model.selectedPageProperty().get()));
-            if (!(current > 0)) {
-                return Optional.empty();
-            }
-
-            for (int i = current - 1; i >= 0; i--) {
-                var r = content.get(i);
-                if (r instanceof NavLink link) {
-                    return Optional.of(link);
-                }
-            }
-
-            return Optional.empty();
-        }
-
-        public Optional<NavLink> getNext() {
-            var current = content.indexOf(registry.get(model.selectedPageProperty().get()));
-            if (!(current >= 0 && current < content.size() - 1)) {
-                return Optional.empty();
-            } // has next
-
-            for (int i = current + 1; i < content.size(); i++) {
-                var r = content.get(i);
-                if (r instanceof NavLink link) {
-                    return Optional.of(link);
-                }
-            }
-
-            return Optional.empty();
-        }
-
-        private ObservableList<Region> create() {
-            return FXCollections.observableArrayList(
-                caption("GENERAL"),
-                navLink(ThemePage.NAME, ThemePage.class),
-                navLink(TypographyPage.NAME, TypographyPage.class),
-                navLink(IconsPage.NAME, IconsPage.class),
-                caption("COMPONENTS"),
-                navLink(OverviewPage.NAME, OverviewPage.class),
-                navLink(InputGroupPage.NAME, InputGroupPage.class),
-                new Spacer(10, Orientation.VERTICAL),
-                navLink(AccordionPage.NAME, AccordionPage.class),
-                navLink(BreadcrumbsPage.NAME, BreadcrumbsPage.class),
-                navLink(ButtonPage.NAME, ButtonPage.class),
-                navLink(ChartPage.NAME, ChartPage.class),
-                navLink(CheckBoxPage.NAME, CheckBoxPage.class),
-                navLink(ColorPickerPage.NAME, ColorPickerPage.class),
-                navLink(ComboBoxPage.NAME, ComboBoxPage.class, "ChoiceBox"),
-                navLink(CustomTextFieldPage.NAME, CustomTextFieldPage.class, "MaskTextField", "PasswordTextField"),
-                navLink(DatePickerPage.NAME, DatePickerPage.class),
-                navLink(DialogPage.NAME, DialogPage.class),
-                navLink(HtmlEditorPage.NAME, HtmlEditorPage.class),
-                navLink(LabelPage.NAME, LabelPage.class),
-                navLink(ListPage.NAME, ListPage.class),
-                navLink(MenuPage.NAME, MenuPage.class),
-                navLink(MenuButtonPage.NAME, MenuButtonPage.class, "SplitMenuButton"),
-                navLink(PaginationPage.NAME, PaginationPage.class),
-                navLink(PopoverPage.NAME, PopoverPage.class),
-                navLink(ProgressPage.NAME, ProgressPage.class),
-                navLink(RadioButtonPage.NAME, RadioButtonPage.class),
-                navLink(ScrollPanePage.NAME, ScrollPanePage.class),
-                navLink(SeparatorPage.NAME, SeparatorPage.class),
-                navLink(SliderPage.NAME, SliderPage.class),
-                navLink(SpinnerPage.NAME, SpinnerPage.class),
-                navLink(SplitPanePage.NAME, SplitPanePage.class),
-                navLink(TablePage.NAME, TablePage.class),
-                navLink(TabPanePage.NAME, TabPanePage.class),
-                navLink(TextAreaPage.NAME, TextAreaPage.class),
-                navLink(TextFieldPage.NAME, TextFieldPage.class, "PasswordField"),
-                navLink(TitledPanePage.NAME, TitledPanePage.class),
-                navLink(ToggleButtonPage.NAME, ToggleButtonPage.class),
-                navLink(ToggleSwitchPage.NAME, ToggleSwitchPage.class),
-                navLink(ToolBarPage.NAME, ToolBarPage.class),
-                navLink(TooltipPage.NAME, TooltipPage.class),
-                navLink(TreePage.NAME, TreePage.class),
-                navLink(TreeTablePage.NAME, TreeTablePage.class),
-                caption("SHOWCASE"),
-                navLink(FileManagerPage.NAME, FileManagerPage.class),
-                navLink(MusicPlayerPage.NAME, MusicPlayerPage.class),
-                navLink(WidgetCollectionPage.NAME,
-                    WidgetCollectionPage.class,
-                    "Card", "Message", "Stepper", "Tag"
-                )
-            );
-        }
-
-        private Label caption(String text) {
-            var label = new Label(text);
-            label.getStyleClass().add("caption");
-            label.setMaxWidth(Double.MAX_VALUE);
-            return label;
-        }
-
-        private NavLink navLink(String text, Class<? extends Page> pageClass, String... keywords) {
-            var link = new NavLink(text, pageClass);
-
-            if (keywords != null && keywords.length > 0) {
-                link.getSearchKeywords().addAll(Arrays.asList(keywords));
-            }
-
-            link.setOnMouseClicked(e -> {
-                if (e.getSource() instanceof NavLink target) {
-                    model.navigate(target.getPageClass());
-                }
-            });
-
-            return link;
-        }
-    }
-
-    private static class NavLink extends Label {
-
-        private final Class<? extends Page> pageClass;
-        private final List<String> searchKeywords = new ArrayList<>();
-
-        public NavLink(String text, Class<? extends Page> pageClass) {
-            super(Objects.requireNonNull(text));
-            this.pageClass = Objects.requireNonNull(pageClass);
-
-            getStyleClass().add("nav-link");
-            setMaxWidth(Double.MAX_VALUE);
-        }
-
-        public Class<? extends Page> getPageClass() {
-            return pageClass;
-        }
-
-        public List<String> getSearchKeywords() {
-            return searchKeywords;
-        }
-
-        public boolean matches(String filter) {
-            Objects.requireNonNull(filter);
-            return contains(getText(), filter)
-                || searchKeywords.stream().anyMatch(keyword -> contains(keyword, filter));
-        }
-
-        private boolean contains(String text, String filter) {
-            return text.toLowerCase().contains(filter.toLowerCase());
-        }
     }
 }

sampler/src/main/java/atlantafx/sampler/page/components/CustomTextFieldPage.java

@@ -12,6 +12,7 @@ import atlantafx.base.controls.PasswordTextField;
 import atlantafx.sampler.page.AbstractPage;
 import atlantafx.sampler.page.SampleBlock;
 import java.time.LocalTime;
+import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import javafx.geometry.Pos;
 import javafx.scene.Cursor;
@@ -120,7 +121,7 @@ public class CustomTextFieldPage extends AbstractPage {
 
         var timeFormatter = DateTimeFormatter.ofPattern("HH:mm");
         var timeField = new MaskTextField("29:59");
-        timeField.setText(LocalTime.now().format(timeFormatter));
+        timeField.setText(LocalTime.now(ZoneId.systemDefault()).format(timeFormatter));
         timeField.setLeft(new FontIcon(Material2OutlinedMZ.TIMER));
         timeField.setPrefWidth(120);
         timeField.textProperty().addListener((obs, old, val) -> {

sampler/src/main/resources/atlantafx/sampler/assets/styles/scss/general/_util.scss

@@ -4,3 +4,8 @@
   -fx-border-width: 1px;
   -fx-border-color: -color-border-muted;
 }
+
+.icon-subtle {
+  -fx-fill: -color-fg-subtle;
+  -fx-icon-color: -color-fg-subtle;
+}

sampler/src/main/resources/atlantafx/sampler/assets/styles/scss/layout/_main.scss

@@ -66,6 +66,38 @@
     }
   }
 
+  >.search-button {
+    -color-button-bg: -color-accent-emphasis;
+    -color-button-fg: -color-fg-emphasis;
+    -color-button-border: transparent;
+    -color-button-bg-hover: -color-accent-6;
+    -color-button-fg-hover: -color-fg-emphasis;
+    -color-button-border-hover: transparent;
+    -color-button-bg-focused: -color-accent-emphasis;
+    -color-button-fg-focused: -color-fg-emphasis;
+    -color-button-border-focused: transparent;
+    -color-button-bg-pressed: -color-accent-emphasis;
+    -color-button-fg-pressed: -color-fg-emphasis;
+    -color-button-border-pressed: transparent;
+    -color-button-shadow: transparent;
+
+    -fx-padding: 6px 16px 6px 12px;
+
+    >.box {
+      >* {
+        -fx-fill: -color-fg-emphasis;
+      }
+
+      >.label {
+        -fx-text-fill: -color-fg-emphasis;
+        -fx-border-color: -color-fg-emphasis;
+        -fx-border-width: 1;
+        -fx-padding: 2px 6px 2px 6px;
+        -fx-opacity: 0.5;
+      }
+    }
+  }
+
   >.page-title {
     -fx-text-fill: -color-fg-emphasis;
     -fx-padding: 0 0 0 30px;
@@ -84,40 +116,61 @@
 }
 
 #sidebar {
-  // border is necessary when scrollbar is hidden
-  // e.g. when displaying search result
-  -fx-border-color: -color-border-subtle;
-  -fx-border-width: 0 1px 0 0;
 
-  >.scroll-pane {
+  .nav-tree-cell {
-    -fx-background-color: -color-bg-inset;
+    -fx-padding: 0;
-    -fx-padding: 0 16px 10px 16px;
+    -fx-indent: 8px;
-  }
+    -color-cell-bg: -color-bg-inset;
+    -color-cell-bg-selected: -color-bg-inset;
+    -color-cell-bg-selected-focused: -color-bg-inset;
+    -fx-background-radius: 5px;
 
-  &:filtered {
+    >.tree-disclosure-node,
-    >.scroll-pane {
+    >.tree-disclosure-node>.arrow {
-      -fx-padding: 10px 16px 10px 16px;
+      -fx-min-width: 0;
+      -fx-pref-width: 0;
+      -fx-max-width: 0;
+      -fx-min-height: 0;
+      -fx-pref-height: 0;
+      -fx-max-height: 0;
+      visibility: hidden;
     }
-  }
 
-  .nav-menu {
+    >.container {
-    >.caption {
+      -fx-min-height: 2.1em;
-      -fx-padding: 18px 0 10px 0;
+      -fx-pref-height: 2.1em;
+      -fx-max-height: 2.1em;
+      -fx-padding: 0 0 0 8px;
+    }
+
+    &:selected >.container >.title {
       -fx-font-weight: bold;
-      -fx-text-fill: -color-fg-muted;
+      -fx-text-fill: -color-accent-fg;
     }
 
-    >.nav-link {
+    &:hover:filled {
-      -fx-padding: 6px 8px 6px 8px;
+      -color-cell-bg: -color-accent-subtle;
+    }
 
-      &:hover {
+    &:group {
-        -fx-background-color: -color-accent-muted;
+      >.container {
-        -fx-background-radius: 6px;
+        -fx-min-height: 2.5em;
+        -fx-pref-height: 2.5em;
+        -fx-max-height: 2.5em;
+        -fx-padding: 0 0 0 8px;
+
+        .ikonli-font-icon {
+          -fx-fill: -color-accent-fg;
+          -fx-icon-color: -color-accent-fg;
+        }
+
+        >.arrow {
+          -fx-icon-code: mdal-expand_more;
+        }
       }
 
-      &:selected {
+      &:expanded>.container>.arrow {
-        -fx-text-fill: -color-accent-fg;
+        -fx-icon-code: mdal-chevron_right;
-        -fx-font-weight: bold;
       }
     }
   }