ScrollBar: support pressed track, thumb and button colors (issue #115)

CHANGELOG.md

@@ -6,6 +6,9 @@ FlatLaf Change Log
 - Button and ToggleButton: Support disabled background color (use UI values
   `Button.disabledBackground` and `ToggleButton.disabledBackground`). (issue
   #112)
+- ScrollBar: Support pressed track, thumb and button colors (use UI values
+  `ScrollBar.pressedTrackColor`, `ScrollBar.pressedThumbColor` and
+  `ScrollBar.pressedButtonBackground`). (issue #115)
 - TableHeader: Support top/bottom/left positioned sort arrow when using
   [Glazed Lists](https://github.com/glazedlists/glazedlists). (issue #113)
 

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

@@ -47,15 +47,23 @@ public class FlatArrowButton
 	private final Color disabledForeground;
 	private final Color hoverForeground;
 	private final Color hoverBackground;
+	private final Color pressedBackground;
 
 	private int arrowWidth = DEFAULT_ARROW_WIDTH;
 	private int xOffset = 0;
 	private int yOffset = 0;
 
 	private boolean hover;
+	private boolean pressed;
 
 	public FlatArrowButton( int direction, String type, Color foreground, Color disabledForeground,
 		Color hoverForeground, Color hoverBackground )
+	{
+		this( direction, type, foreground, disabledForeground, hoverForeground, hoverBackground, null );
+	}
+
+	public FlatArrowButton( int direction, String type, Color foreground, Color disabledForeground,
+		Color hoverForeground, Color hoverBackground, Color pressedBackground )
 	{
 		super( direction, Color.WHITE, Color.WHITE, Color.WHITE, Color.WHITE );
 
@@ -64,11 +72,12 @@ public class FlatArrowButton
 		this.disabledForeground = disabledForeground;
 		this.hoverForeground = hoverForeground;
 		this.hoverBackground = hoverBackground;
+		this.pressedBackground = pressedBackground;
 
 		setOpaque( false );
 		setBorder( null );
 
-		if( hoverForeground != null || hoverBackground != null ) {
+		if( hoverForeground != null || hoverBackground != null || pressedBackground != null ) {
 			addMouseListener( new MouseAdapter() {
 				@Override
 				public void mouseEntered( MouseEvent e ) {
@@ -81,6 +90,18 @@ public class FlatArrowButton
 					hover = false;
 					repaint();
 				}
+
+				@Override
+				public void mousePressed( MouseEvent e ) {
+					pressed = true;
+					repaint();
+				}
+
+				@Override
+				public void mouseReleased( MouseEvent e ) {
+					pressed = false;
+					repaint();
+				}
 			} );
 		}
 	}
@@ -97,6 +118,10 @@ public class FlatArrowButton
 		return hover;
 	}
 
+	protected boolean isPressed() {
+		return pressed;
+	}
+
 	public int getXOffset() {
 		return xOffset;
 	}
@@ -113,8 +138,8 @@ public class FlatArrowButton
 		this.yOffset = yOffset;
 	}
 
-	protected Color deriveHoverBackground( Color hoverBackground ) {
-		return hoverBackground;
+	protected Color deriveBackground( Color background ) {
+		return background;
 	}
 
 	@Override
@@ -136,10 +161,18 @@ public class FlatArrowButton
 		int height = getHeight();
 		boolean enabled = isEnabled();
 
-		// paint hover background
-		if( enabled && isHover() && hoverBackground != null ) {
-			g.setColor( deriveHoverBackground( hoverBackground ) );
-			g.fillRect( 0, 0, width, height );
+		// paint hover or pressed background
+		if( enabled ) {
+			Color background = (pressedBackground != null && isPressed())
+				? deriveBackground( pressedBackground )
+				: ((hoverBackground != null && isHover())
+					? deriveBackground( hoverBackground )
+					: null);
+
+			if( background != null ) {
+				g.setColor( background );
+				g.fillRect( 0, 0, width, height );
+			}
 		}
 
 		int direction = getDirection();

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

@@ -59,13 +59,18 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault ScrollBar.thumbInsets					Insets
  * @uiDefault ScrollBar.trackArc					int
  * @uiDefault ScrollBar.thumbArc					int
- * @uiDefault ScrollBar.hoverTrackColor				Color
- * @uiDefault ScrollBar.hoverThumbColor				Color
+ * @uiDefault ScrollBar.hoverTrackColor				Color	optional
+ * @uiDefault ScrollBar.hoverThumbColor				Color	optional
  * @uiDefault ScrollBar.hoverThumbWithTrack			boolean
+ * @uiDefault ScrollBar.pressedTrackColor			Color	optional
+ * @uiDefault ScrollBar.pressedThumbColor			Color	optional
+ * @uiDefault ScrollBar.pressedThumbWithTrack		boolean
  * @uiDefault Component.arrowType					String	triangle (default) or chevron
  * @uiDefault ScrollBar.showButtons					boolean
  * @uiDefault ScrollBar.buttonArrowColor			Color
  * @uiDefault ScrollBar.buttonDisabledArrowColor	Color
+ * @uiDefault ScrollBar.hoverButtonBackground		Color	optional
+ * @uiDefault ScrollBar.pressedButtonBackground		Color	optional
  *
  * @author Karl Tauber
  */
@@ -79,11 +84,16 @@ public class FlatScrollBarUI
 	protected Color hoverTrackColor;
 	protected Color hoverThumbColor;
 	protected boolean hoverThumbWithTrack;
+	protected Color pressedTrackColor;
+	protected Color pressedThumbColor;
+	protected boolean pressedThumbWithTrack;
 
 	protected boolean showButtons;
 	protected String arrowType;
 	protected Color buttonArrowColor;
 	protected Color buttonDisabledArrowColor;
+	protected Color hoverButtonBackground;
+	protected Color pressedButtonBackground;
 
 	private MouseAdapter hoverListener;
 	protected boolean hoverTrack;
@@ -122,11 +132,16 @@ public class FlatScrollBarUI
 		hoverTrackColor = UIManager.getColor( "ScrollBar.hoverTrackColor" );
 		hoverThumbColor = UIManager.getColor( "ScrollBar.hoverThumbColor" );
 		hoverThumbWithTrack = UIManager.getBoolean( "ScrollBar.hoverThumbWithTrack" );
+		pressedTrackColor = UIManager.getColor( "ScrollBar.pressedTrackColor" );
+		pressedThumbColor = UIManager.getColor( "ScrollBar.pressedThumbColor" );
+		pressedThumbWithTrack = UIManager.getBoolean( "ScrollBar.pressedThumbWithTrack" );
 
 		showButtons = UIManager.getBoolean( "ScrollBar.showButtons" );
 		arrowType = UIManager.getString( "Component.arrowType" );
 		buttonArrowColor = UIManager.getColor( "ScrollBar.buttonArrowColor" );
 		buttonDisabledArrowColor = UIManager.getColor( "ScrollBar.buttonDisabledArrowColor" );
+		hoverButtonBackground = UIManager.getColor( "ScrollBar.hoverButtonBackground" );
+		pressedButtonBackground = UIManager.getColor( "ScrollBar.pressedButtonBackground" );
 	}
 
 	@Override
@@ -137,9 +152,13 @@ public class FlatScrollBarUI
 		thumbInsets = null;
 		hoverTrackColor = null;
 		hoverThumbColor = null;
+		pressedTrackColor = null;
+		pressedThumbColor = null;
 
 		buttonArrowColor = null;
 		buttonDisabledArrowColor = null;
+		hoverButtonBackground = null;
+		pressedButtonBackground = null;
 	}
 
 	@Override
@@ -188,12 +207,12 @@ public class FlatScrollBarUI
 	}
 
 	private JButton createArrowButton( int orientation ) {
-		FlatArrowButton button = new FlatArrowButton( orientation,
-			arrowType, buttonArrowColor, buttonDisabledArrowColor, null, hoverTrackColor )
+		FlatArrowButton button = new FlatArrowButton( orientation, arrowType, buttonArrowColor,
+			buttonDisabledArrowColor, null, hoverButtonBackground, pressedButtonBackground )
 		{
 			@Override
-			protected Color deriveHoverBackground( Color hoverBackground ) {
-				return getTrackColor( scrollbar, true ) ;
+			protected Color deriveBackground( Color background ) {
+				return FlatUIUtils.deriveColor( background, scrollbar.getBackground() );
 			}
 
 			@Override
@@ -236,7 +255,7 @@ public class FlatScrollBarUI
 
 	@Override
 	protected void paintTrack( Graphics g, JComponent c, Rectangle trackBounds ) {
-		g.setColor( getTrackColor( c, hoverTrack ) );
+		g.setColor( getTrackColor( c, hoverTrack, isPressed && hoverTrack && !hoverThumb ) );
 		paintTrackOrThumb( g, c, trackBounds, trackInsets, trackArc );
 	}
 
@@ -245,7 +264,8 @@ public class FlatScrollBarUI
 		if( thumbBounds.isEmpty() || !scrollbar.isEnabled() )
 			return;
 
-		g.setColor( getThumbColor( c, hoverThumb || (hoverThumbWithTrack && hoverTrack) ) );
+		g.setColor( getThumbColor( c, hoverThumb || (hoverThumbWithTrack && hoverTrack),
+			isPressed && (hoverThumb || (pressedThumbWithTrack && hoverTrack)) ) );
 		paintTrackOrThumb( g, c, thumbBounds, thumbInsets, thumbArc );
 	}
 
@@ -277,15 +297,23 @@ public class FlatScrollBarUI
 		// do not paint
 	}
 
-	protected Color getTrackColor( JComponent c, boolean hover ) {
+	protected Color getTrackColor( JComponent c, boolean hover, boolean pressed ) {
 		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
-		return hover ? FlatUIUtils.deriveColor( hoverTrackColor, trackColor ) : trackColor;
+		return (pressed && pressedTrackColor != null)
+			? FlatUIUtils.deriveColor( pressedTrackColor, trackColor )
+			: ((hover && hoverTrackColor != null)
+				? FlatUIUtils.deriveColor( hoverTrackColor, trackColor )
+				: trackColor);
 	}
 
-	protected Color getThumbColor( JComponent c, boolean hover ) {
+	protected Color getThumbColor( JComponent c, boolean hover, boolean pressed ) {
 		Color trackColor = FlatUIUtils.deriveColor( this.trackColor, c.getBackground() );
 		Color thumbColor = FlatUIUtils.deriveColor( this.thumbColor, trackColor );
-		return hover ? FlatUIUtils.deriveColor( hoverThumbColor, thumbColor ) : thumbColor;
+		return (pressed && pressedThumbColor != null)
+			? FlatUIUtils.deriveColor( pressedThumbColor, thumbColor )
+			: ((hover && hoverThumbColor != null)
+				? FlatUIUtils.deriveColor( hoverThumbColor, thumbColor )
+				: thumbColor);
 	}
 
 	@Override
@@ -323,11 +351,14 @@ public class FlatScrollBarUI
 		@Override
 		public void mousePressed( MouseEvent e ) {
 			isPressed = true;
+			repaint();
 		}
 
 		@Override
 		public void mouseReleased( MouseEvent e ) {
 			isPressed = false;
+			repaint();
+
 			update( e.getX(), e.getY() );
 		}
 

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

@@ -221,6 +221,9 @@ ScrollBar.track=lighten(@background,1%,derived noAutoInverse)
 ScrollBar.thumb=lighten($ScrollBar.track,10%,derived noAutoInverse)
 ScrollBar.hoverTrackColor=lighten($ScrollBar.track,4%,derived noAutoInverse)
 ScrollBar.hoverThumbColor=lighten($ScrollBar.thumb,10%,derived noAutoInverse)
+ScrollBar.pressedThumbColor=lighten($ScrollBar.thumb,15%,derived noAutoInverse)
+ScrollBar.hoverButtonBackground=lighten(@background,5%,derived noAutoInverse)
+ScrollBar.pressedButtonBackground=lighten(@background,10%,derived noAutoInverse)
 
 
 #---- Separator ----

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

@@ -431,6 +431,7 @@ ScrollBar.thumbInsets=0,0,0,0
 ScrollBar.trackArc=0
 ScrollBar.thumbArc=0
 ScrollBar.hoverThumbWithTrack=false
+ScrollBar.pressedThumbWithTrack=false
 ScrollBar.showButtons=false
 ScrollBar.squareButtons=false
 ScrollBar.buttonArrowColor=$ComboBox.buttonArrowColor

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

@@ -228,6 +228,9 @@ ScrollBar.track=lighten(@background,1%,derived noAutoInverse)
 ScrollBar.thumb=darken($ScrollBar.track,10%,derived noAutoInverse)
 ScrollBar.hoverTrackColor=darken($ScrollBar.track,3%,derived noAutoInverse)
 ScrollBar.hoverThumbColor=darken($ScrollBar.thumb,10%,derived noAutoInverse)
+ScrollBar.pressedThumbColor=darken($ScrollBar.thumb,20%,derived noAutoInverse)
+ScrollBar.hoverButtonBackground=darken(@background,5%,derived noAutoInverse)
+ScrollBar.pressedButtonBackground=darken(@background,10%,derived noAutoInverse)
 
 
 #---- Separator ----

flatlaf-testing/src/main/resources/com/formdev/flatlaf/testing/uidefaults/FlatDarkLaf_1.8.0_202.txt

@@ -762,11 +762,15 @@ ScrollBar.background           #3c3f41    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.buttonArrowColor     #9a9da1    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.buttonDisabledArrowColor #585858    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.foreground           #bbbbbb    javax.swing.plaf.ColorUIResource [UI]
+ScrollBar.hoverButtonBackground #484c4e    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(5%)
 ScrollBar.hoverThumbColor      #6e767a    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(10%)
 ScrollBar.hoverThumbWithTrack  false
 ScrollBar.hoverTrackColor      #484c4f    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(4%)
 ScrollBar.maximumThumbSize     4096,4096    javax.swing.plaf.DimensionUIResource [UI]
 ScrollBar.minimumThumbSize     8,8    javax.swing.plaf.DimensionUIResource [UI]
+ScrollBar.pressedButtonBackground #54595c    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(10%)
+ScrollBar.pressedThumbColor    #7a8387    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(15%)
+ScrollBar.pressedThumbWithTrack false
 ScrollBar.showButtons          false
 ScrollBar.squareButtons        false
 ScrollBar.thumb                #565c5f    com.formdev.flatlaf.util.DerivedColor [UI]    lighten(10%)

flatlaf-testing/src/main/resources/com/formdev/flatlaf/testing/uidefaults/FlatLightLaf_1.8.0_202.txt

@@ -764,11 +764,15 @@ ScrollBar.background           #f2f2f2    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.buttonArrowColor     #666666    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.buttonDisabledArrowColor #ababab    javax.swing.plaf.ColorUIResource [UI]
 ScrollBar.foreground           #000000    javax.swing.plaf.ColorUIResource [UI]
+ScrollBar.hoverButtonBackground #e5e5e5    com.formdev.flatlaf.util.DerivedColor [UI]    darken(5%)
 ScrollBar.hoverThumbColor      #c3c3c3    com.formdev.flatlaf.util.DerivedColor [UI]    darken(10%)
 ScrollBar.hoverThumbWithTrack  false
 ScrollBar.hoverTrackColor      #ededed    com.formdev.flatlaf.util.DerivedColor [UI]    darken(3%)
 ScrollBar.maximumThumbSize     4096,4096    javax.swing.plaf.DimensionUIResource [UI]
 ScrollBar.minimumThumbSize     8,8    javax.swing.plaf.DimensionUIResource [UI]
+ScrollBar.pressedButtonBackground #d9d9d9    com.formdev.flatlaf.util.DerivedColor [UI]    darken(10%)
+ScrollBar.pressedThumbColor    #a9a9a9    com.formdev.flatlaf.util.DerivedColor [UI]    darken(20%)
+ScrollBar.pressedThumbWithTrack false
 ScrollBar.showButtons          false
 ScrollBar.squareButtons        false
 ScrollBar.thumb                #dcdcdc    com.formdev.flatlaf.util.DerivedColor [UI]    darken(10%)