ScrollBar implemented

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

@@ -0,0 +1,83 @@
+/*
+ * 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 java.awt.Dimension;
+import java.awt.Graphics;
+import java.awt.Rectangle;
+import javax.swing.JButton;
+import javax.swing.JComponent;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicScrollBarUI;
+import com.formdev.flatlaf.util.UIScale;
+
+/**
+ * Provides the Flat LaF UI delegate for {@link javax.swing.JScrollBar}.
+ *
+ * @author Karl Tauber
+ */
+public class FlatScrollBarUI
+	extends BasicScrollBarUI
+{
+	public static ComponentUI createUI( JComponent c ) {
+		return new FlatScrollBarUI();
+	}
+
+	@Override
+	public Dimension getPreferredSize( JComponent c ) {
+		return UIScale.scale( super.getPreferredSize( c ) );
+	}
+
+	@Override
+	protected JButton createDecreaseButton( int orientation ) {
+		return createInvisibleButton();
+	}
+
+	@Override
+	protected JButton createIncreaseButton( int orientation ) {
+		return createInvisibleButton();
+	}
+
+	private JButton createInvisibleButton() {
+		JButton button = new JButton();
+		button.setMinimumSize( new Dimension() );
+		button.setMaximumSize( new Dimension() );
+		button.setPreferredSize( new Dimension() );
+		button.setFocusable( false );
+		button.setRequestFocusEnabled( false );
+		return button;
+	}
+
+	@Override
+	protected void paintDecreaseHighlight( Graphics g ) {
+		// do not paint
+	}
+
+	@Override
+	protected void paintIncreaseHighlight( Graphics g ) {
+		// do not paint
+	}
+
+	@Override
+	protected void paintThumb( Graphics g, JComponent c, Rectangle thumbBounds ) {
+		if( thumbBounds.isEmpty() || !scrollbar.isEnabled() )
+			return;
+
+		g.setColor( thumbColor );
+		g.fillRect( thumbBounds.x, thumbBounds.y, thumbBounds.width, thumbBounds.height );
+	}
+}

flatlaf-core/src/main/java/com/formdev/flatlaf/util/UIScale.java

@@ -16,6 +16,7 @@
 
 package com.formdev.flatlaf.util;
 
+import java.awt.Dimension;
 import java.awt.Font;
 import java.awt.Graphics2D;
 import java.awt.GraphicsEnvironment;
@@ -24,6 +25,8 @@ import java.beans.PropertyChangeListener;
 import java.lang.reflect.Method;
 import javax.swing.LookAndFeel;
 import javax.swing.UIManager;
+import javax.swing.plaf.DimensionUIResource;
+import javax.swing.plaf.UIResource;
 
 /**
  * Two scaling modes are supported for HiDPI displays:
@@ -184,4 +187,12 @@ public class UIScale
 		if( scaleFactor != 1f )
 			g.scale( scaleFactor, scaleFactor );
 	}
+
+	public static Dimension scale( Dimension dimension ) {
+		return (dimension == null || scaleFactor == 1f)
+			? dimension
+			: (dimension instanceof UIResource
+				? new DimensionUIResource( scale( dimension.width ), scale( dimension.height ) )
+				: new Dimension          ( scale( dimension.width ), scale( dimension.height ) ));
+	}
 }

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

@@ -89,3 +89,9 @@ Component.focusColor=3d6185
 #---- Label ----
 
 Label.disabledForeground=@disabledText
+
+
+#---- ScrollBar ----
+
+ScrollBar.track=3F4244
+ScrollBar.thumb=47A6A6A6

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

@@ -23,6 +23,7 @@ FormattedTextFieldUI=com.formdev.flatlaf.ui.FlatFormattedTextFieldUI
 LabelUI=com.formdev.flatlaf.ui.FlatLabelUI
 PasswordFieldUI=com.formdev.flatlaf.ui.FlatPasswordFieldUI
 RadioButtonUI=com.formdev.flatlaf.ui.FlatRadioButtonUI
+ScrollBarUI=com.formdev.flatlaf.ui.FlatScrollBarUI
 ScrollPaneUI=com.formdev.flatlaf.ui.FlatScrollPaneUI
 TextAreaUI=com.formdev.flatlaf.ui.FlatTextAreaUI
 TextFieldUI=com.formdev.flatlaf.ui.FlatTextFieldUI
@@ -79,6 +80,11 @@ RadioButton.border=com.formdev.flatlaf.ui.FlatMarginBorder
 RadioButton.icon=com.formdev.flatlaf.ui.FlatRadioButtonIcon
 
 
+#---- ScrollBar ----
+
+ScrollBar.width=10
+
+
 #---- ScrollPane ----
 
 ScrollPane.border=com.formdev.flatlaf.ui.FlatBorder

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

@@ -89,3 +89,9 @@ Component.focusColor=97c3f3
 #---- Label ----
 
 Label.disabledForeground=@disabledText
+
+
+#---- ScrollBar ----
+
+ScrollBar.track=F5F5F5
+ScrollBar.thumb=33737373