TabbedPane: completed review of PR #343 (active tab border painting style)

- replaced `activeTabBorder` with `tabType`
- added `TabbedPane.cardTabSelectionHeight`

flatlaf-core/src/main/java/com/formdev/flatlaf/FlatClientProperties.java

@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-
 package com.formdev.flatlaf;
+
 import java.awt.Color;
 import java.util.Objects;
 import javax.swing.JComponent;
@@ -324,6 +324,35 @@ public interface FlatClientProperties
 
 	//---- JTabbedPane --------------------------------------------------------
 
+	/**
+	 * Specifies type of the selected tab.
+	 * <p>
+	 * <strong>Component</strong> {@link javax.swing.JTabbedPane}<br>
+	 * <strong>Value type</strong> {@link java.lang.String}<br>
+	 * <strong>Allowed Values</strong>
+	 *     {@link #TABBED_PANE_TAB_TYPE_UNDERLINED} or
+	 *     {@link #TABBED_PANE_TAB_TYPE_CARD}
+	 *
+	 * @since 2
+	 */
+	String TABBED_PANE_TAB_TYPE = "JTabbedPane.tabType";
+
+	/**
+	 * Paint the selected tab underlined.
+	 *
+	 * @see #TABBED_PANE_TAB_TYPE
+	 * @since 2
+	 */
+	String TABBED_PANE_TAB_TYPE_UNDERLINED = "underlined";
+
+	/**
+	 * Paint the selected tab as card.
+	 *
+	 * @see #TABBED_PANE_TAB_TYPE
+	 * @since 2
+	 */
+	String TABBED_PANE_TAB_TYPE_CARD = "card";
+
 	/**
 	 * Specifies whether separators are shown between tabs.
 	 * <p>
@@ -332,15 +361,6 @@ public interface FlatClientProperties
 	 */
 	String TABBED_PANE_SHOW_TAB_SEPARATORS = "JTabbedPane.showTabSeparators";
 
-	/**
-	 * Specifies whether a border is painted around the active tab.
-	 * This also changes position of the active tab indicator.
-	 * <p>
-	 * <strong>Component</strong> {@link javax.swing.JTabbedPane}<br>
-	 * <strong>Value type</strong> {@link java.lang.Boolean}
-	 */
-	String TABBED_PANE_ACTIVE_TAB_BORDER = "JTabbedPane.activeTabBorder";
-
 	/**
 	 * Specifies whether the separator between tabs area and content area should be shown.
 	 * <p>

flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatTabbedPaneUI.java

@@ -97,7 +97,6 @@ import com.formdev.flatlaf.util.UIScale;
  *
  * @clientProperty JTabbedPane.showTabSeparators		boolean
  * @clientProperty JTabbedPane.hasFullBorder			boolean
- * @clientProperty JTabbedPane.activeTabBorder			boolean
  *
  * <!-- BasicTabbedPaneUI -->
  *
@@ -131,6 +130,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TabbedPane.maximumTabWidth				int		optional
  * @uiDefault TabbedPane.tabHeight						int
  * @uiDefault TabbedPane.tabSelectionHeight				int
+ * @uiDefault TabbedPane.cardTabSelectionHeight			int
  * @uiDefault TabbedPane.contentSeparatorHeight			int
  * @uiDefault TabbedPane.showTabSeparators				boolean
  * @uiDefault TabbedPane.tabSeparatorsFullHeight		boolean
@@ -138,6 +138,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault TabbedPane.activeTabBorder				boolean
  *
  * @uiDefault TabbedPane.tabLayoutPolicy				String	wrap (default) or scroll
+ * @uiDefault TabbedPane.tabType						String	underlined (default) or card
  * @uiDefault TabbedPane.tabsPopupPolicy				String	never or asNeeded (default)
  * @uiDefault TabbedPane.scrollButtonsPolicy			String	never, asNeeded or asNeededSingle (default)
  * @uiDefault TabbedPane.scrollButtonsPlacement			String	both (default) or trailing
@@ -161,6 +162,10 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatTabbedPaneUI
 	extends BasicTabbedPaneUI
 {
+	// tab type
+	/** @since 2 */ protected static final int TAB_TYPE_UNDERLINED = 0;
+	/** @since 2 */ protected static final int TAB_TYPE_CARD = 1;
+
 	// tabs popup policy / scroll arrows policy
 	protected static final int NEVER = 0;
 //	protected static final int ALWAYS = 1;
@@ -196,13 +201,14 @@ public class FlatTabbedPaneUI
 	protected int maximumTabWidth;
 	protected int tabHeight;
 	protected int tabSelectionHeight;
+	/** @since 2 */ protected int cardTabSelectionHeight;
 	protected int contentSeparatorHeight;
 	protected boolean showTabSeparators;
 	protected boolean tabSeparatorsFullHeight;
 	protected boolean hasFullBorder;
 	protected boolean tabsOpaque = true;
-	protected boolean activeTabBorder;
 
+	private int tabType;
 	private int tabsPopupPolicy;
 	private int scrollButtonsPolicy;
 	private int scrollButtonsPlacement;
@@ -304,13 +310,14 @@ public class FlatTabbedPaneUI
 		maximumTabWidth = UIManager.getInt( "TabbedPane.maximumTabWidth" );
 		tabHeight = UIManager.getInt( "TabbedPane.tabHeight" );
 		tabSelectionHeight = UIManager.getInt( "TabbedPane.tabSelectionHeight" );
+		cardTabSelectionHeight = UIManager.getInt( "TabbedPane.cardTabSelectionHeight" );
 		contentSeparatorHeight = UIManager.getInt( "TabbedPane.contentSeparatorHeight" );
 		showTabSeparators = UIManager.getBoolean( "TabbedPane.showTabSeparators" );
 		tabSeparatorsFullHeight = UIManager.getBoolean( "TabbedPane.tabSeparatorsFullHeight" );
 		hasFullBorder = UIManager.getBoolean( "TabbedPane.hasFullBorder" );
 		tabsOpaque = UIManager.getBoolean( "TabbedPane.tabsOpaque" );
-		activeTabBorder = UIManager.getBoolean( "TabbedPane.activeTabBorder" );
 
+		tabType = parseTabType( UIManager.getString( "TabbedPane.tabType" ) );
 		tabsPopupPolicy = parseTabsPopupPolicy( UIManager.getString( "TabbedPane.tabsPopupPolicy" ) );
 		scrollButtonsPolicy = parseScrollButtonsPolicy( UIManager.getString( "TabbedPane.scrollButtonsPolicy" ) );
 		scrollButtonsPlacement = parseScrollButtonsPlacement( UIManager.getString( "TabbedPane.scrollButtonsPlacement" ) );
@@ -625,7 +632,7 @@ public class FlatTabbedPaneUI
 
 		// increase size of repaint region to include part of content border
 		if( contentSeparatorHeight > 0 &&
-			clientPropertyBoolean( tabPane, TABBED_PANE_ACTIVE_TAB_BORDER, activeTabBorder ) &&
+			getTabType() == TAB_TYPE_CARD &&
 			clientPropertyBoolean( tabPane, TABBED_PANE_SHOW_CONTENT_SEPARATOR, true ) )
 		{
 			int sh = scale( contentSeparatorHeight );
@@ -980,6 +987,7 @@ public class FlatTabbedPaneUI
 		g.fillRect( x, y, w, h );
 	}
 
+	/** @since 2 */
 	protected Color getTabBackground( int tabPlacement, int tabIndex, boolean isSelected ) {
 		boolean enabled = tabPane.isEnabled();
 		return enabled && tabPane.isEnabledAt( tabIndex ) && getRolloverTab() == tabIndex
@@ -999,8 +1007,8 @@ public class FlatTabbedPaneUI
 		if( clientPropertyBoolean( tabPane, TABBED_PANE_SHOW_TAB_SEPARATORS, showTabSeparators ) &&
 			!isLastInRun( tabIndex ) )
 		{
-			if( clientPropertyBoolean( tabPane, TABBED_PANE_ACTIVE_TAB_BORDER, activeTabBorder ) ) {
-				// Some separators need to be omitted when activeTabBorder is enabled
+			if( getTabType() == TAB_TYPE_CARD ) {
+				// some separators need to be omitted if selected tab is painted as card
 				int selectedIndex = tabPane.getSelectedIndex();
 				if( tabIndex != selectedIndex - 1 && tabIndex != selectedIndex )
 					paintTabSeparator( g, tabPlacement, x, y, w, h );
@@ -1009,11 +1017,12 @@ public class FlatTabbedPaneUI
 		}
 
 		// paint active tab border
-		if( isSelected && clientPropertyBoolean( tabPane, TABBED_PANE_ACTIVE_TAB_BORDER, activeTabBorder ) )
-			paintSelectedTabBorder( g, tabPlacement, tabIndex, x, y, w, h );
+		if( isSelected && getTabType() == TAB_TYPE_CARD )
+			paintCardTabBorder( g, tabPlacement, tabIndex, x, y, w, h );
 	}
 
-	protected void paintSelectedTabBorder( Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h ) {
+	/** @since 2 */
+	protected void paintCardTabBorder( Graphics g, int tabPlacement, int tabIndex, int x, int y, int w, int h ) {
 		Graphics2D g2 = (Graphics2D) g;
 
 		float borderWidth = scale( (float) contentSeparatorHeight );
@@ -1035,8 +1044,8 @@ public class FlatTabbedPaneUI
 				break;
 		}
 
-		if( tabSelectionHeight <= 0 ) {
-			//If there is no tab selection indicator, paint a top border as well
+		if( cardTabSelectionHeight <= 0 ) {
+			// if there is no tab selection indicator, paint a top border as well
 			switch( tabPlacement ) {
 				default:
 				case TOP:
@@ -1098,9 +1107,9 @@ public class FlatTabbedPaneUI
 		g.setColor( tabPane.isEnabled() ? underlineColor : disabledUnderlineColor );
 
 		// paint underline selection
-		boolean atBottom = !clientPropertyBoolean( tabPane, TABBED_PANE_ACTIVE_TAB_BORDER, activeTabBorder );
+		boolean atBottom = (getTabType() != TAB_TYPE_CARD);
 		Insets contentInsets = getContentBorderInsets( tabPlacement );
-		int tabSelectionHeight = scale( this.tabSelectionHeight );
+		int tabSelectionHeight = scale( atBottom ? this.tabSelectionHeight : cardTabSelectionHeight );
 		int sx, sy;
 		switch( tabPlacement ) {
 			case TOP:
@@ -1189,7 +1198,7 @@ public class FlatTabbedPaneUI
 			w - (ci.left / 100f) - (ci.right / 100f), h - (ci.top / 100f) - (ci.bottom / 100f) ), false );
 
 		// add gap for selected tab to path
-		if( clientPropertyBoolean( tabPane, TABBED_PANE_ACTIVE_TAB_BORDER, activeTabBorder ) ) {
+		if( getTabType() == TAB_TYPE_CARD ) {
 			float csh = scale( (float) contentSeparatorHeight );
 
 			Rectangle tabRect = getTabBounds( tabPane, selectedIndex );
@@ -1426,6 +1435,15 @@ public class FlatTabbedPaneUI
 			clientPropertyBoolean( tabPane, TABBED_PANE_HIDE_TAB_AREA_WITH_ONE_TAB, false );
 	}
 
+	/** @since 2 */
+	protected int getTabType() {
+		Object value = tabPane.getClientProperty( TABBED_PANE_TAB_TYPE );
+
+		return (value instanceof String)
+			? parseTabType( (String) value )
+			: tabType;
+	}
+
 	protected int getTabsPopupPolicy() {
 		Object value = tabPane.getClientProperty( TABBED_PANE_TABS_POPUP_POLICY );
 
@@ -1478,6 +1496,18 @@ public class FlatTabbedPaneUI
 			: tabWidthMode;
 	}
 
+	/** @since 2 */
+	protected static int parseTabType( String str ) {
+		if( str == null )
+			return TAB_TYPE_UNDERLINED;
+
+		switch( str ) {
+			default:
+			case TABBED_PANE_TAB_TYPE_UNDERLINED:		return TAB_TYPE_UNDERLINED;
+			case TABBED_PANE_TAB_TYPE_CARD:				return TAB_TYPE_CARD;
+		}
+	}
+
 	protected static int parseTabsPopupPolicy( String str ) {
 		if( str == null )
 			return AS_NEEDED;
@@ -2445,7 +2475,7 @@ public class FlatTabbedPaneUI
 					break;
 
 				case TABBED_PANE_SHOW_TAB_SEPARATORS:
-				case TABBED_PANE_ACTIVE_TAB_BORDER:
+				case TABBED_PANE_TAB_TYPE:
 					tabPane.repaint();
 					break;
 

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -569,9 +569,9 @@ SplitPaneDivider.gripGap = 2
 
 TabbedPane.tabHeight = 32
 TabbedPane.tabSelectionHeight = 3
+TabbedPane.cardTabSelectionHeight = 2
 TabbedPane.contentSeparatorHeight = 1
 TabbedPane.showTabSeparators = false
-TabbedPane.activeTabBorder = false
 TabbedPane.tabSeparatorsFullHeight = false
 TabbedPane.hasFullBorder = false
 TabbedPane.tabInsets = 4,12,4,12
@@ -591,6 +591,9 @@ TabbedPane.tabAlignment = center
 # allowed values: preferred, equal or compact
 TabbedPane.tabWidthMode = preferred
 
+# allowed values: underlined or card
+TabbedPane.tabType = underlined
+
 # allowed values: chevron or triangle
 TabbedPane.arrowType = chevron
 TabbedPane.buttonInsets = 2,1,2,1

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/TabsPanel.java

@@ -303,17 +303,16 @@ class TabsPanel
 		putTabbedPanesClientProperty( TABBED_PANE_SCROLL_BUTTONS_PLACEMENT, scrollButtonsPlacement );
 	}
 
+	private void tabTypeChanged() {
+		String tabType = cardTabTypeButton.isSelected() ? TABBED_PANE_TAB_TYPE_CARD : null;
+		putTabbedPanesClientProperty( TABBED_PANE_TAB_TYPE, tabType );
+	}
+
 	private void showTabSeparatorsChanged() {
 		Boolean showTabSeparators = showTabSeparatorsCheckBox.isSelected() ? true : null;
 		putTabbedPanesClientProperty( TABBED_PANE_SHOW_TAB_SEPARATORS, showTabSeparators );
 	}
 
-	private void activeTabBorderChanged() {
-		Boolean activeBorderTab = activeTabBorderCheckBox.isSelected() ? true : false;
-		System.out.println(TABBED_PANE_ACTIVE_TAB_BORDER + ": " + activeBorderTab);
-		putTabbedPanesClientProperty( TABBED_PANE_ACTIVE_TAB_BORDER, activeBorderTab );
-	}
-
 	private void putTabbedPanesClientProperty( String key, Object value ) {
 		updateTabbedPanesRecur( this, tabbedPane -> tabbedPane.putClientProperty( key, value ) );
 	}
@@ -402,12 +401,15 @@ class TabsPanel
 		scrollButtonsPlacementToolBar = new JToolBar();
 		scrollBothButton = new JToggleButton();
 		scrollTrailingButton = new JToggleButton();
+		showTabSeparatorsCheckBox = new JCheckBox();
 		tabsPopupPolicyLabel = new JLabel();
 		tabsPopupPolicyToolBar = new JToolBar();
 		popupAsNeededButton = new JToggleButton();
 		popupNeverButton = new JToggleButton();
-		showTabSeparatorsCheckBox = new JCheckBox();
-		activeTabBorderCheckBox = new JCheckBox();
+		tabTypeLabel = new JLabel();
+		tabTypeToolBar = new JToolBar();
+		underlinedTabTypeButton = new JToggleButton();
+		cardTabTypeButton = new JToggleButton();
 
 		//======== this ========
 		setName("this");
@@ -502,7 +504,7 @@ class TabsPanel
 			{
 				tabPlacementTabbedPane.setName("tabPlacementTabbedPane");
 			}
-			panel1.add(tabPlacementTabbedPane, "cell 0 1, width 300:300, height 100:100");
+			panel1.add(tabPlacementTabbedPane, "cell 0 1,width 300:300,height 100:100");
 
 			//---- tabLayoutLabel ----
 			tabLayoutLabel.setText("Tab layout");
@@ -880,7 +882,8 @@ class TabsPanel
 				"[]" +
 				"[fill]para" +
 				"[fill]" +
-				"[fill]para",
+				"[fill]para" +
+				"[fill]",
 				// rows
 				"[]" +
 				"[center]"));
@@ -948,6 +951,12 @@ class TabsPanel
 			}
 			panel4.add(scrollButtonsPlacementToolBar, "cell 3 0");
 
+			//---- showTabSeparatorsCheckBox ----
+			showTabSeparatorsCheckBox.setText("Show tab separators");
+			showTabSeparatorsCheckBox.setName("showTabSeparatorsCheckBox");
+			showTabSeparatorsCheckBox.addActionListener(e -> showTabSeparatorsChanged());
+			panel4.add(showTabSeparatorsCheckBox, "cell 4 0");
+
 			//---- tabsPopupPolicyLabel ----
 			tabsPopupPolicyLabel.setText("Tabs popup policy:");
 			tabsPopupPolicyLabel.setName("tabsPopupPolicyLabel");
@@ -976,17 +985,32 @@ class TabsPanel
 			}
 			panel4.add(tabsPopupPolicyToolBar, "cell 1 1");
 
-			//---- showTabSeparatorsCheckBox ----
-			showTabSeparatorsCheckBox.setText("Show tab separators");
-			showTabSeparatorsCheckBox.setName("showTabSeparatorsCheckBox");
-			showTabSeparatorsCheckBox.addActionListener(e -> showTabSeparatorsChanged());
-			panel4.add(showTabSeparatorsCheckBox, "cell 2 1");
+			//---- tabTypeLabel ----
+			tabTypeLabel.setText("Tab type:");
+			tabTypeLabel.setName("tabTypeLabel");
+			panel4.add(tabTypeLabel, "cell 2 1");
 
-			//---- activeTabBorderCheckBox ----
-			activeTabBorderCheckBox.setText("Paint border around active tab");
-			activeTabBorderCheckBox.setName("activeTabBorderCheckBox");
-			activeTabBorderCheckBox.addActionListener(e -> activeTabBorderChanged());
-			panel4.add(activeTabBorderCheckBox, "cell 3 1");
+			//======== tabTypeToolBar ========
+			{
+				tabTypeToolBar.setFloatable(false);
+				tabTypeToolBar.setName("tabTypeToolBar");
+
+				//---- underlinedTabTypeButton ----
+				underlinedTabTypeButton.setText("underlined");
+				underlinedTabTypeButton.setFont(underlinedTabTypeButton.getFont().deriveFont(underlinedTabTypeButton.getFont().getSize() - 2f));
+				underlinedTabTypeButton.setSelected(true);
+				underlinedTabTypeButton.setName("underlinedTabTypeButton");
+				underlinedTabTypeButton.addActionListener(e -> tabTypeChanged());
+				tabTypeToolBar.add(underlinedTabTypeButton);
+
+				//---- cardTabTypeButton ----
+				cardTabTypeButton.setText("card");
+				cardTabTypeButton.setFont(cardTabTypeButton.getFont().deriveFont(cardTabTypeButton.getFont().getSize() - 2f));
+				cardTabTypeButton.setName("cardTabTypeButton");
+				cardTabTypeButton.addActionListener(e -> tabTypeChanged());
+				tabTypeToolBar.add(cardTabTypeButton);
+			}
+			panel4.add(tabTypeToolBar, "cell 3 1");
 		}
 		add(panel4, "cell 0 2 3 1");
 
@@ -1023,6 +1047,11 @@ class TabsPanel
 		ButtonGroup tabsPopupPolicyButtonGroup = new ButtonGroup();
 		tabsPopupPolicyButtonGroup.add(popupAsNeededButton);
 		tabsPopupPolicyButtonGroup.add(popupNeverButton);
+
+		//---- tabTypeButtonGroup ----
+		ButtonGroup tabTypeButtonGroup = new ButtonGroup();
+		tabTypeButtonGroup.add(underlinedTabTypeButton);
+		tabTypeButtonGroup.add(cardTabTypeButton);
 		// JFormDesigner - End of component initialization  //GEN-END:initComponents
 
 		if( FlatLafDemo.screenshotsMode ) {
@@ -1102,11 +1131,14 @@ class TabsPanel
 	private JToolBar scrollButtonsPlacementToolBar;
 	private JToggleButton scrollBothButton;
 	private JToggleButton scrollTrailingButton;
+	private JCheckBox showTabSeparatorsCheckBox;
 	private JLabel tabsPopupPolicyLabel;
 	private JToolBar tabsPopupPolicyToolBar;
 	private JToggleButton popupAsNeededButton;
 	private JToggleButton popupNeverButton;
-	private JCheckBox showTabSeparatorsCheckBox;
-	private JCheckBox activeTabBorderCheckBox;
+	private JLabel tabTypeLabel;
+	private JToolBar tabTypeToolBar;
+	private JToggleButton underlinedTabTypeButton;
+	private JToggleButton cardTabTypeButton;
 	// JFormDesigner - End of variables declaration  //GEN-END:variables
 }

flatlaf-demo/src/main/java/com/formdev/flatlaf/demo/TabsPanel.jfd

@@ -457,7 +457,7 @@ new FormModel {
 			} )
 			add( new FormContainer( "javax.swing.JPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 				"$layoutConstraints": "insets 0,hidemode 3"
-				"$columnConstraints": "[][fill]para[fill][fill]para"
+				"$columnConstraints": "[][fill]para[fill][fill]para[fill]"
 				"$rowConstraints": "[][center]"
 			} ) {
 				name: "panel4"
@@ -527,6 +527,16 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 3 0"
 				} )
+				add( new FormComponent( "javax.swing.JCheckBox" ) {
+					name: "showTabSeparatorsCheckBox"
+					"text": "Show tab separators"
+					auxiliary() {
+						"JavaCodeGenerator.variableLocal": false
+					}
+					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showTabSeparatorsChanged", false ) )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 4 0"
+				} )
 				add( new FormComponent( "javax.swing.JLabel" ) {
 					name: "tabsPopupPolicyLabel"
 					"text": "Tabs popup policy:"
@@ -555,15 +565,32 @@ new FormModel {
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 					"value": "cell 1 1"
 				} )
-				add( new FormComponent( "javax.swing.JCheckBox" ) {
-					name: "showTabSeparatorsCheckBox"
-					"text": "Show tab separators"
-					auxiliary() {
-						"JavaCodeGenerator.variableLocal": false
-					}
-					addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showTabSeparatorsChanged", false ) )
+				add( new FormComponent( "javax.swing.JLabel" ) {
+					name: "tabTypeLabel"
+					"text": "Tab type:"
 				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-					"value": "cell 2 1 2 1"
+					"value": "cell 2 1"
+				} )
+				add( new FormContainer( "javax.swing.JToolBar", new FormLayoutManager( class javax.swing.JToolBar ) ) {
+					name: "tabTypeToolBar"
+					"floatable": false
+					add( new FormComponent( "javax.swing.JToggleButton" ) {
+						name: "underlinedTabTypeButton"
+						"text": "underlined"
+						"font": &SwingDerivedFont8 new com.jformdesigner.model.SwingDerivedFont( null, 0, -2, false )
+						"selected": true
+						"$buttonGroup": new FormReference( "tabTypeButtonGroup" )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "tabTypeChanged", false ) )
+					} )
+					add( new FormComponent( "javax.swing.JToggleButton" ) {
+						name: "cardTabTypeButton"
+						"text": "card"
+						"font": #SwingDerivedFont8
+						"$buttonGroup": new FormReference( "tabTypeButtonGroup" )
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "tabTypeChanged", false ) )
+					} )
+				}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+					"value": "cell 3 1"
 				} )
 			}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 				"value": "cell 0 2 3 1"
@@ -602,5 +629,10 @@ new FormModel {
 		}, new FormLayoutConstraints( null ) {
 			"location": new java.awt.Point( 200, 1020 )
 		} )
+		add( new FormNonVisual( "javax.swing.ButtonGroup" ) {
+			name: "tabTypeButtonGroup"
+		}, new FormLayoutConstraints( null ) {
+			"location": new java.awt.Point( 0, 1072 )
+		} )
 	}
 }

flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/components/FlatTabbedPane.java

@@ -363,6 +363,29 @@ public class FlatTabbedPane
 	}
 
 
+	// NOTE: enum names must be equal to allowed strings
+	/** @since 2 */ public enum TabType { underlined, card };
+
+	/**
+	 * Returns type of selected tab.
+	 *
+	 * @since 2
+	 */
+	public TabType getTabType() {
+		return getClientPropertyEnumString( TABBED_PANE_TAB_TYPE, TabType.class,
+			"TabbedPane.tabType", TabType.underlined );
+	}
+
+	/**
+	 * Specifies type of selected tab.
+	 *
+	 * @since 2
+	 */
+	public void setTabType( TabType tabType ) {
+		putClientPropertyEnumString( TABBED_PANE_TAB_TYPE, tabType );
+	}
+
+
 	// NOTE: enum names must be equal to allowed strings
 	public enum TabsPopupPolicy { never, asNeeded };
 

flatlaf-testing/dumps/uidefaults/FlatDarkLaf_1.8.0_202.txt

@@ -980,6 +980,7 @@ TabbedPane.buttonArc           6
 TabbedPane.buttonHoverBackground #303234    com.formdev.flatlaf.util.DerivedColor [UI]    darken(5%)
 TabbedPane.buttonInsets        2,1,2,1    javax.swing.plaf.InsetsUIResource [UI]
 TabbedPane.buttonPressedBackground #282a2c    com.formdev.flatlaf.util.DerivedColor [UI]    darken(8%)
+TabbedPane.cardTabSelectionHeight 2
 TabbedPane.closeArc            4
 TabbedPane.closeCrossFilledSize 7.5
 TabbedPane.closeCrossLineWidth 1.0
@@ -1022,6 +1023,7 @@ TabbedPane.tabInsets           4,12,4,12    javax.swing.plaf.InsetsUIResource [U
 TabbedPane.tabRunOverlay       0
 TabbedPane.tabSelectionHeight  3
 TabbedPane.tabSeparatorsFullHeight false
+TabbedPane.tabType             underlined
 TabbedPane.tabWidthMode        preferred
 TabbedPane.tabsOpaque          true
 TabbedPane.tabsOverlapBorder   false

flatlaf-testing/dumps/uidefaults/FlatLightLaf_1.8.0_202.txt

@@ -985,6 +985,7 @@ TabbedPane.buttonArc           6
 TabbedPane.buttonHoverBackground #e0e0e0    com.formdev.flatlaf.util.DerivedColor [UI]    darken(7% autoInverse)
 TabbedPane.buttonInsets        2,1,2,1    javax.swing.plaf.InsetsUIResource [UI]
 TabbedPane.buttonPressedBackground #d9d9d9    com.formdev.flatlaf.util.DerivedColor [UI]    darken(10% autoInverse)
+TabbedPane.cardTabSelectionHeight 2
 TabbedPane.closeArc            4
 TabbedPane.closeCrossFilledSize 7.5
 TabbedPane.closeCrossLineWidth 1.0
@@ -1027,6 +1028,7 @@ TabbedPane.tabInsets           4,12,4,12    javax.swing.plaf.InsetsUIResource [U
 TabbedPane.tabRunOverlay       0
 TabbedPane.tabSelectionHeight  3
 TabbedPane.tabSeparatorsFullHeight false
+TabbedPane.tabType             underlined
 TabbedPane.tabWidthMode        preferred
 TabbedPane.tabsOpaque          true
 TabbedPane.tabsOverlapBorder   false

flatlaf-testing/dumps/uidefaults/FlatTestLaf_1.8.0_202.txt

@@ -980,6 +980,7 @@ TabbedPane.buttonArc           6
 TabbedPane.buttonHoverBackground #ffff00    javax.swing.plaf.ColorUIResource [UI]
 TabbedPane.buttonInsets        2,1,2,1    javax.swing.plaf.InsetsUIResource [UI]
 TabbedPane.buttonPressedBackground #ffc800    javax.swing.plaf.ColorUIResource [UI]
+TabbedPane.cardTabSelectionHeight 2
 TabbedPane.closeArc            999
 TabbedPane.closeCrossFilledSize 6.5
 TabbedPane.closeCrossLineWidth 2.0
@@ -1025,6 +1026,7 @@ TabbedPane.tabRunOverlay       0
 TabbedPane.tabSelectionHeight  3
 TabbedPane.tabSeparatorColor   #0000ff    javax.swing.plaf.ColorUIResource [UI]
 TabbedPane.tabSeparatorsFullHeight false
+TabbedPane.tabType             underlined
 TabbedPane.tabWidthMode        preferred
 TabbedPane.tabsOpaque          true
 TabbedPane.tabsOverlapBorder   false

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatContainerTest.java

@@ -50,6 +50,8 @@ public class FlatContainerTest
 	public FlatContainerTest() {
 		initComponents();
 
+		tabTypeComboBox.init( TabType.class, true );
+
 		tabPlacementField.init( TabPlacement.class, true );
 		iconPlacementField.init( TabIconPlacement.class, true );
 		tabsPopupPolicyField.init( TabsPopupPolicy.class, true );
@@ -310,6 +312,12 @@ public class FlatContainerTest
 			tabbedPane.setTabWidthMode( value );
 	}
 
+	private void tabTypeChanged() {
+		TabType value = tabTypeComboBox.getSelectedValue();
+		for( FlatTabbedPane tabbedPane : allTabbedPanes )
+			tabbedPane.setTabType( value );
+	}
+
 	private void tabBackForegroundChanged() {
 		for( JTabbedPane tabbedPane : allTabbedPanes )
 			tabBackForegroundChanged( tabbedPane );
@@ -491,6 +499,8 @@ public class FlatContainerTest
 		tabAlignmentField = new FlatTestEnumComboBox<>();
 		JLabel tabWidthModeLabel = new JLabel();
 		tabWidthModeField = new FlatTestEnumComboBox<>();
+		JLabel tabTypeLabel = new JLabel();
+		tabTypeComboBox = new FlatTestEnumComboBox<>();
 		leadingComponentCheckBox = new JCheckBox();
 		customBorderCheckBox = new JCheckBox();
 		tabAreaInsetsCheckBox = new JCheckBox();
@@ -619,6 +629,7 @@ public class FlatContainerTest
 					"[]" +
 					"[]" +
 					"[]" +
+					"[]" +
 					"[]para" +
 					"[]" +
 					"[]para" +
@@ -739,75 +750,83 @@ public class FlatContainerTest
 				tabWidthModeField.addActionListener(e -> tabWidthModeChanged());
 				tabbedPaneControlPanel.add(tabWidthModeField, "cell 2 5");
 
+				//---- tabTypeLabel ----
+				tabTypeLabel.setText("Tab type:");
+				tabbedPaneControlPanel.add(tabTypeLabel, "cell 0 6");
+
+				//---- tabTypeComboBox ----
+				tabTypeComboBox.addActionListener(e -> tabTypeChanged());
+				tabbedPaneControlPanel.add(tabTypeComboBox, "cell 1 6");
+
 				//---- leadingComponentCheckBox ----
 				leadingComponentCheckBox.setText("Leading component");
 				leadingComponentCheckBox.addActionListener(e -> leadingComponentChanged());
-				tabbedPaneControlPanel.add(leadingComponentCheckBox, "cell 0 6");
+				tabbedPaneControlPanel.add(leadingComponentCheckBox, "cell 0 7");
 
 				//---- customBorderCheckBox ----
 				customBorderCheckBox.setText("Custom border");
 				customBorderCheckBox.addActionListener(e -> customBorderChanged());
-				tabbedPaneControlPanel.add(customBorderCheckBox, "cell 1 6");
+				tabbedPaneControlPanel.add(customBorderCheckBox, "cell 1 7");
 
 				//---- tabAreaInsetsCheckBox ----
 				tabAreaInsetsCheckBox.setText("Tab area insets (5,5,10,10)");
 				tabAreaInsetsCheckBox.addActionListener(e -> tabAreaInsetsChanged());
-				tabbedPaneControlPanel.add(tabAreaInsetsCheckBox, "cell 2 6");
+				tabbedPaneControlPanel.add(tabAreaInsetsCheckBox, "cell 2 7");
 
 				//---- trailingComponentCheckBox ----
 				trailingComponentCheckBox.setText("Trailing component");
 				trailingComponentCheckBox.addActionListener(e -> trailingComponentChanged());
-				tabbedPaneControlPanel.add(trailingComponentCheckBox, "cell 0 7");
+				tabbedPaneControlPanel.add(trailingComponentCheckBox, "cell 0 8");
 
 				//---- hasFullBorderCheckBox ----
 				hasFullBorderCheckBox.setText("Show content border");
 				hasFullBorderCheckBox.addActionListener(e -> hasFullBorderChanged());
-				tabbedPaneControlPanel.add(hasFullBorderCheckBox, "cell 1 7,alignx left,growx 0");
+				tabbedPaneControlPanel.add(hasFullBorderCheckBox, "cell 1 8,alignx left,growx 0");
 
 				//---- smallerTabHeightCheckBox ----
 				smallerTabHeightCheckBox.setText("Smaller tab height (26)");
 				smallerTabHeightCheckBox.addActionListener(e -> smallerTabHeightChanged());
-				tabbedPaneControlPanel.add(smallerTabHeightCheckBox, "cell 2 7");
+				tabbedPaneControlPanel.add(smallerTabHeightCheckBox, "cell 2 8");
 
 				//---- minimumTabWidthCheckBox ----
 				minimumTabWidthCheckBox.setText("Minimum tab width (100)");
 				minimumTabWidthCheckBox.addActionListener(e -> minimumTabWidthChanged());
-				tabbedPaneControlPanel.add(minimumTabWidthCheckBox, "cell 0 8");
+				tabbedPaneControlPanel.add(minimumTabWidthCheckBox, "cell 0 9");
 
 				//---- hideContentSeparatorCheckBox ----
 				hideContentSeparatorCheckBox.setText("Hide content separator");
 				hideContentSeparatorCheckBox.addActionListener(e -> hideContentSeparatorChanged());
-				tabbedPaneControlPanel.add(hideContentSeparatorCheckBox, "cell 1 8");
+				tabbedPaneControlPanel.add(hideContentSeparatorCheckBox, "cell 1 9");
 
 				//---- smallerInsetsCheckBox ----
 				smallerInsetsCheckBox.setText("Smaller tab insets (2,2,2,2)");
 				smallerInsetsCheckBox.addActionListener(e -> smallerInsetsChanged());
-				tabbedPaneControlPanel.add(smallerInsetsCheckBox, "cell 2 8");
+				tabbedPaneControlPanel.add(smallerInsetsCheckBox, "cell 2 9");
 
 				//---- maximumTabWidthCheckBox ----
 				maximumTabWidthCheckBox.setText("Maximum tab width (60)");
 				maximumTabWidthCheckBox.addActionListener(e -> maximumTabWidthChanged());
-				tabbedPaneControlPanel.add(maximumTabWidthCheckBox, "cell 0 9");
+				tabbedPaneControlPanel.add(maximumTabWidthCheckBox, "cell 0 10");
 
 				//---- showTabSeparatorsCheckBox ----
 				showTabSeparatorsCheckBox.setText("Show tab separators");
 				showTabSeparatorsCheckBox.addActionListener(e -> showTabSeparatorsChanged());
-				tabbedPaneControlPanel.add(showTabSeparatorsCheckBox, "cell 1 9");
+				tabbedPaneControlPanel.add(showTabSeparatorsCheckBox, "cell 1 10");
 
 				//---- secondTabWiderCheckBox ----
 				secondTabWiderCheckBox.setText("Second Tab insets wider (4,20,4,20)");
 				secondTabWiderCheckBox.addActionListener(e -> secondTabWiderChanged());
-				tabbedPaneControlPanel.add(secondTabWiderCheckBox, "cell 2 9");
+				tabbedPaneControlPanel.add(secondTabWiderCheckBox, "cell 2 10");
 
 				//---- hideTabAreaWithOneTabCheckBox ----
 				hideTabAreaWithOneTabCheckBox.setText("Hide tab area with one tab");
 				hideTabAreaWithOneTabCheckBox.addActionListener(e -> hideTabAreaWithOneTabChanged());
-				tabbedPaneControlPanel.add(hideTabAreaWithOneTabCheckBox, "cell 1 10");
+				tabbedPaneControlPanel.add(hideTabAreaWithOneTabCheckBox, "cell 1 11");
 
 				//---- customWheelScrollingCheckBox ----
 				customWheelScrollingCheckBox.setText("Custom wheel scrolling");
 				customWheelScrollingCheckBox.addActionListener(e -> customWheelScrollingChanged());
-				tabbedPaneControlPanel.add(customWheelScrollingCheckBox, "cell 2 10");
+				tabbedPaneControlPanel.add(customWheelScrollingCheckBox, "cell 2 11");
 			}
 			panel9.add(tabbedPaneControlPanel, cc.xywh(1, 11, 3, 1));
 		}
@@ -840,6 +859,7 @@ public class FlatContainerTest
 	private FlatTestEnumComboBox<TabAreaAlignment> tabAreaAlignmentField;
 	private FlatTestEnumComboBox<TabAlignment> tabAlignmentField;
 	private FlatTestEnumComboBox<TabWidthMode> tabWidthModeField;
+	private FlatTestEnumComboBox<TabType> tabTypeComboBox;
 	private JCheckBox leadingComponentCheckBox;
 	private JCheckBox customBorderCheckBox;
 	private JCheckBox tabAreaInsetsCheckBox;

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatContainerTest.jfd

@@ -132,7 +132,7 @@ new FormModel {
 				add( new FormContainer( "com.formdev.flatlaf.testing.FlatTestFrame$NoRightToLeftPanel", new FormLayoutManager( class net.miginfocom.swing.MigLayout ) {
 					"$layoutConstraints": "insets 0,hidemode 3"
 					"$columnConstraints": "[][fill][]"
-					"$rowConstraints": "[center][][][][][]para[][]para[][][]"
+					"$rowConstraints": "[center][][][][][][]para[][]para[][][]"
 				} ) {
 					name: "tabbedPaneControlPanel"
 					"opaque": false
@@ -372,6 +372,22 @@ new FormModel {
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
 						"value": "cell 2 5"
 					} )
+					add( new FormComponent( "javax.swing.JLabel" ) {
+						name: "tabTypeLabel"
+						"text": "Tab type:"
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 0 6"
+					} )
+					add( new FormComponent( "com.formdev.flatlaf.testing.FlatTestEnumComboBox" ) {
+						name: "tabTypeComboBox"
+						auxiliary() {
+							"JavaCodeGenerator.typeParameters": "TabType"
+							"JavaCodeGenerator.variableLocal": false
+						}
+						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "tabTypeChanged", false ) )
+					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
+						"value": "cell 1 6"
+					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "leadingComponentCheckBox"
 						"text": "Leading component"
@@ -380,7 +396,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "leadingComponentChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 0 6"
+						"value": "cell 0 7"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "customBorderCheckBox"
@@ -390,7 +406,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "customBorderChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 1 6"
+						"value": "cell 1 7"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "tabAreaInsetsCheckBox"
@@ -400,7 +416,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "tabAreaInsetsChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 2 6"
+						"value": "cell 2 7"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "trailingComponentCheckBox"
@@ -410,7 +426,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "trailingComponentChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 0 7"
+						"value": "cell 0 8"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "hasFullBorderCheckBox"
@@ -420,7 +436,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "hasFullBorderChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 1 7,alignx left,growx 0"
+						"value": "cell 1 8,alignx left,growx 0"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "smallerTabHeightCheckBox"
@@ -430,7 +446,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "smallerTabHeightChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 2 7"
+						"value": "cell 2 8"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "minimumTabWidthCheckBox"
@@ -440,7 +456,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "minimumTabWidthChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 0 8"
+						"value": "cell 0 9"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "hideContentSeparatorCheckBox"
@@ -450,7 +466,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "hideContentSeparatorChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 1 8"
+						"value": "cell 1 9"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "smallerInsetsCheckBox"
@@ -460,7 +476,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "smallerInsetsChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 2 8"
+						"value": "cell 2 9"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "maximumTabWidthCheckBox"
@@ -470,7 +486,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "maximumTabWidthChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 0 9"
+						"value": "cell 0 10"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "showTabSeparatorsCheckBox"
@@ -480,7 +496,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "showTabSeparatorsChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 1 9"
+						"value": "cell 1 10"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "secondTabWiderCheckBox"
@@ -490,7 +506,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "secondTabWiderChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 2 9"
+						"value": "cell 2 10"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "hideTabAreaWithOneTabCheckBox"
@@ -500,7 +516,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "hideTabAreaWithOneTabChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 1 10"
+						"value": "cell 1 11"
 					} )
 					add( new FormComponent( "javax.swing.JCheckBox" ) {
 						name: "customWheelScrollingCheckBox"
@@ -510,7 +526,7 @@ new FormModel {
 						}
 						addEvent( new FormEvent( "java.awt.event.ActionListener", "actionPerformed", "customWheelScrollingChanged", false ) )
 					}, new FormLayoutConstraints( class net.miginfocom.layout.CC ) {
-						"value": "cell 2 10"
+						"value": "cell 2 11"
 					} )
 				}, new FormLayoutConstraints( class com.jgoodies.forms.layout.CellConstraints ) {
 					"gridY": 11

flatlaf-theme-editor/src/main/resources/com/formdev/flatlaf/themeeditor/FlatLafUIKeys.txt

@@ -709,6 +709,7 @@ TabbedPane.buttonArc
 TabbedPane.buttonHoverBackground
 TabbedPane.buttonInsets
 TabbedPane.buttonPressedBackground
+TabbedPane.cardTabSelectionHeight
 TabbedPane.closeArc
 TabbedPane.closeCrossFilledSize
 TabbedPane.closeCrossLineWidth
@@ -754,6 +755,7 @@ TabbedPane.tabInsets
 TabbedPane.tabRunOverlay
 TabbedPane.tabSelectionHeight
 TabbedPane.tabSeparatorsFullHeight
+TabbedPane.tabType
 TabbedPane.tabWidthMode
 TabbedPane.tabsOpaque
 TabbedPane.tabsOverlapBorder