TabbedPane basic implementation

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

@@ -0,0 +1,269 @@
+/*
+ * Copyright 2019 FormDev Software GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.formdev.flatlaf.ui;
+
+import static com.formdev.flatlaf.util.UIScale.scale;
+import java.awt.Color;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.Insets;
+import java.awt.Rectangle;
+import java.beans.PropertyChangeEvent;
+import java.beans.PropertyChangeListener;
+import javax.swing.JComponent;
+import javax.swing.UIManager;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.UIResource;
+import javax.swing.plaf.basic.BasicTabbedPaneUI;
+import javax.swing.text.View;
+import sun.swing.SwingUtilities2;
+
+/**
+ * Provides the Flat LaF UI delegate for {@link javax.swing.JTabbedPane}.
+ *
+ * @clientProperty JTabbedPane.hasFullBorder			boolean
+ *
+ * @uiDefault TabbedPane.font							Font
+ * @uiDefault TabbedPane.background						Color
+ * @uiDefault TabbedPane.foreground						Color
+ * @uiDefault TabbedPane.disabledForeground				Color
+ * @uiDefault TabbedPane.selectedForeground				Color
+ * @uiDefault TabbedPane.underlineColor					Color
+ * @uiDefault TabbedPane.disabledUnderlineColor			Color
+ * @uiDefault TabbedPane.hoverColor						Color
+ * @uiDefault TabbedPane.focusColor						Color
+ * @uiDefault TabbedPane.textIconGap					int
+ * @uiDefault TabbedPane.tabInsets						Insets
+ * @uiDefault TabbedPane.tabAreaInsets					Insets
+ * @uiDefault TabbedPane.tabHeight						int
+ * @uiDefault TabbedPane.tabSelectionHeight				int
+ * @uiDefault TabbedPane.contentSeparatorWidth			int
+ *
+ * @author Karl Tauber
+ */
+public class FlatTabbedPaneUI
+	extends BasicTabbedPaneUI
+{
+	protected Color disabledForeground;
+	protected Color selectedForeground;
+	protected Color underlineColor;
+	protected Color disabledUnderlineColor;
+	protected Color hoverColor;
+	protected Color focusColor;
+
+	protected int tabHeight;
+	protected int tabSelectionHeight;
+	protected int contentSeparatorHeight;
+
+	public static ComponentUI createUI( JComponent c ) {
+		return new FlatTabbedPaneUI();
+	}
+
+	@Override
+	protected void installDefaults() {
+		super.installDefaults();
+
+		disabledForeground = UIManager.getColor( "TabbedPane.disabledForeground" );
+		selectedForeground = UIManager.getColor( "TabbedPane.selectedForeground" );
+		underlineColor = UIManager.getColor( "TabbedPane.underlineColor" );
+		disabledUnderlineColor = UIManager.getColor( "TabbedPane.disabledUnderlineColor" );
+		hoverColor = UIManager.getColor( "TabbedPane.hoverColor" );
+		focusColor = UIManager.getColor( "TabbedPane.focusColor" );
+
+		tabHeight = UIManager.getInt( "TabbedPane.tabHeight" );
+		tabSelectionHeight = UIManager.getInt( "TabbedPane.tabSelectionHeight" );
+		contentSeparatorHeight = UIManager.getInt( "TabbedPane.contentSeparatorHeight" );
+
+		// scale
+		textIconGap = scale( textIconGap );
+		tabInsets = scale( tabInsets );
+		selectedTabPadInsets = scale( selectedTabPadInsets );
+		tabAreaInsets = scale( tabAreaInsets );
+		tabHeight = scale( tabHeight );
+		tabSelectionHeight = scale( tabSelectionHeight );
+		contentSeparatorHeight = scale( contentSeparatorHeight );
+	}
+
+	@Override
+	protected PropertyChangeListener createPropertyChangeListener() {
+		return new BasicTabbedPaneUI.PropertyChangeHandler() {
+			@Override
+			public void propertyChange( PropertyChangeEvent e ) {
+				super.propertyChange( e );
+
+				if( "JTabbedPane.hasFullBorder".equals( e.getPropertyName() ) ) {
+					tabPane.revalidate();
+					tabPane.repaint();
+				}
+			}
+		};
+	}
+
+	@Override
+	protected void setRolloverTab( int index ) {
+		int oldIndex = getRolloverTab();
+		super.setRolloverTab( index );
+
+		if( index == oldIndex )
+			return;
+
+		// repaint old and new hover tabs
+		repaintTab( oldIndex );
+		repaintTab( index );
+	}
+
+	private void repaintTab( int tabIndex ) {
+		if( tabIndex < 0 || tabIndex >= tabPane.getTabCount() )
+			return;
+
+		Rectangle r = getTabBounds( tabPane, tabIndex );
+		if( r != null )
+			tabPane.repaint( r );
+	}
+
+	@Override
+	protected int calculateTabWidth( int tabPlacement, int tabIndex, FontMetrics metrics ) {
+		return super.calculateTabWidth( tabPlacement, tabIndex, metrics ) - 3;
+	}
+
+	@Override
+	protected int calculateTabHeight( int tabPlacement, int tabIndex, int fontHeight ) {
+		return Math.max( super.calculateTabHeight( tabPlacement, tabIndex, fontHeight ) - 2, tabHeight );
+	}
+
+	/**
+	 * The content border insets are used to create a separator line between tabs and content.
+	 */
+	@Override
+	protected Insets getContentBorderInsets( int tabPlacement ) {
+		boolean hasFullBorder = (tabPane.getClientProperty( "JTabbedPane.hasFullBorder" ) == Boolean.TRUE);
+		Insets insets = hasFullBorder
+			? new Insets( contentSeparatorHeight, contentSeparatorHeight, contentSeparatorHeight, contentSeparatorHeight )
+			: new Insets( contentSeparatorHeight, 0, 0, 0 );
+		rotateInsets( insets, contentBorderInsets, tabPlacement );
+		return contentBorderInsets;
+	}
+
+	@Override
+	protected int getTabLabelShiftX( int tabPlacement, int tabIndex, boolean isSelected ) {
+		return 0;
+	}
+
+	@Override
+	protected int getTabLabelShiftY( int tabPlacement, int tabIndex, boolean isSelected ) {
+		return 0;
+	}
+
+	@Override
+	protected void paintText( Graphics g, int tabPlacement, Font font, FontMetrics metrics,
+		int tabIndex, String title, Rectangle textRect, boolean isSelected )
+	{
+		g.setFont( font );
+
+		// html
+		View view = getTextViewForTab( tabIndex );
+		if( view != null ) {
+			view.paint( g, textRect );
+			return;
+		}
+
+		// plain text
+		Color color;
+		if( tabPane.isEnabled() && tabPane.isEnabledAt( tabIndex ) ) {
+			color = tabPane.getForegroundAt( tabIndex );
+			if( isSelected && (color instanceof UIResource) && selectedForeground != null )
+				color = selectedForeground;
+		} else
+			color = disabledForeground;
+
+		int mnemIndex = tabPane.getDisplayedMnemonicIndexAt( tabIndex );
+
+		g.setColor( color );
+		SwingUtilities2.drawStringUnderlineCharAt( tabPane, g, title, mnemIndex,
+			textRect.x, textRect.y + metrics.getAscent() );
+	}
+
+	@Override
+	protected void paintTabBackground( Graphics g, int tabPlacement, int tabIndex,
+		int x, int y, int w, int h, boolean isSelected )
+	{
+		boolean enabled = tabPane.isEnabled();
+		g.setColor( enabled && getRolloverTab() == tabIndex
+			? hoverColor
+			: (enabled && isSelected && tabPane.hasFocus()
+				? focusColor
+				: tabPane.getBackgroundAt( tabIndex )) );
+		g.fillRect( x, y, w, h );
+	}
+
+	@Override
+	protected void paintTabBorder( Graphics g, int tabPlacement, int tabIndex,
+		int x, int y, int w, int h, boolean isSelected )
+	{
+		if( !isSelected )
+			return;
+
+		g.setColor( tabPane.isEnabled() ? underlineColor : disabledUnderlineColor );
+
+		Insets contentInsets = getContentBorderInsets( tabPlacement );
+
+		// paint underline selection
+		switch( tabPlacement ) {
+			case TOP:
+			default:
+				int sy = y + h + contentInsets.top - tabSelectionHeight;
+				g.fillRect( x, sy, w, tabSelectionHeight );
+				break;
+
+			case BOTTOM:
+				g.fillRect( x, y - contentInsets.bottom, w, tabSelectionHeight );
+				break;
+
+			case LEFT:
+				int sx = x + w + contentInsets.left - tabSelectionHeight;
+				g.fillRect( sx, y, tabSelectionHeight, h );
+				break;
+
+			case RIGHT:
+				g.fillRect( x - contentInsets.right, y, tabSelectionHeight, h );
+				break;
+		}
+	}
+
+	@Override
+	protected void paintContentBorderTopEdge( Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h ) {
+	}
+
+	@Override
+	protected void paintContentBorderLeftEdge( Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h ) {
+	}
+
+	@Override
+	protected void paintContentBorderBottomEdge( Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h ) {
+	}
+
+	@Override
+	protected void paintContentBorderRightEdge( Graphics g, int tabPlacement, int selectedIndex, int x, int y, int w, int h ) {
+	}
+
+	@Override
+	protected void paintFocusIndicator( Graphics g, int tabPlacement, Rectangle[] rects, int tabIndex,
+		Rectangle iconRect, Rectangle textRect, boolean isSelected )
+	{
+	}
+}

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

@@ -130,3 +130,13 @@ Slider.disabledForeground=4c5052
 #---- SplitPane ----
 
 SplitPaneDivider.draggingColor=646464
+
+
+#---- TabbedPane ----
+
+TabbedPane.disabledForeground=777777
+TabbedPane.underlineColor=4A88C7
+TabbedPane.disabledUnderlineColor=7a7a7a
+TabbedPane.hoverColor=2e3133
+TabbedPane.focusColor=3d4b5c
+TabbedPane.contentAreaColor=323232

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

@@ -30,6 +30,7 @@ ScrollPaneUI=com.formdev.flatlaf.ui.FlatScrollPaneUI
 SeparatorUI=com.formdev.flatlaf.ui.FlatSeparatorUI
 SliderUI=com.formdev.flatlaf.ui.FlatSliderUI
 SplitPaneUI=com.formdev.flatlaf.ui.FlatSplitPaneUI
+TabbedPaneUI=com.formdev.flatlaf.ui.FlatTabbedPaneUI
 TextAreaUI=com.formdev.flatlaf.ui.FlatTextAreaUI
 TextFieldUI=com.formdev.flatlaf.ui.FlatTextFieldUI
 TextPaneUI=com.formdev.flatlaf.ui.FlatTextPaneUI
@@ -124,6 +125,18 @@ SplitPane.border=null
 SplitPaneDivider.border=null
 
 
+#---- TabbedPane ----
+
+TabbedPane.tabHeight=32
+TabbedPane.tabSelectionHeight=3
+TabbedPane.contentSeparatorHeight=1
+TabbedPane.tabInsets=0,12,0,12
+TabbedPane.tabAreaInsets=0,0,0,0
+TabbedPane.selectedTabPadInsets=0,0,0,0
+TabbedPane.tabRunOverlay=0
+TabbedPane.tabsOverlapBorder=true
+
+
 #---- TextArea ----
 
 TextArea.border=com.formdev.flatlaf.ui.FlatMarginBorder

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

@@ -130,3 +130,13 @@ Slider.disabledForeground=c0c0c0
 #---- SplitPane ----
 
 SplitPaneDivider.draggingColor=c4c4c4
+
+
+#---- TabbedPane ----
+
+TabbedPane.disabledForeground=999999
+TabbedPane.underlineColor=4083C9
+TabbedPane.disabledUnderlineColor=ababab
+TabbedPane.hoverColor=d9d9d9
+TabbedPane.focusColor=dae4ed
+TabbedPane.contentAreaColor=bfbfbf