IntelliJ Themes: fixes for Slider:

- use Component.focusColor if Slider.focusedColor is not set (which is the case in all IntelliJ themes)
- compute hover color based on thumb color
- ignore Slider.trackWidth (used in Material Theme UI Lite)

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

@@ -371,6 +371,9 @@ public class IntelliJTheme
 		uiKeyMapping.put( "ProgressBar.trackColor",    "ProgressBar.background" );
 		uiKeyMapping.put( "ProgressBar.progressColor", "ProgressBar.foreground" );
 
+		// Slider
+		uiKeyMapping.put( "Slider.trackWidth", "" ); // ignore (used in Material Theme UI Lite)
+
 		for( Map.Entry<String, String> e : uiKeyMapping.entrySet() )
 			uiKeyInverseMapping.put( e.getValue(), e.getKey() );
 

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

@@ -52,7 +52,7 @@ import com.formdev.flatlaf.util.UIScale;
  * @uiDefault Slider.thumbWidth				int
  * @uiDefault Slider.trackColor				Color
  * @uiDefault Slider.thumbColor				Color
- * @uiDefault Slider.focusedColor			Color
+ * @uiDefault Slider.focusedColor			Color	optional; defaults to Component.focusColor
  * @uiDefault Slider.hoverColor				Color	optional; defaults to Slider.focusedColor
  * @uiDefault Slider.disabledForeground		Color	used for track and thumb is disabled
  *
@@ -110,7 +110,7 @@ public class FlatSliderUI
 
 		trackColor = UIManager.getColor( "Slider.trackColor" );
 		thumbColor = UIManager.getColor( "Slider.thumbColor" );
-		focusColor = UIManager.getColor( "Slider.focusedColor" );
+		focusColor = FlatUIUtils.getUIColor( "Slider.focusedColor", "Component.focusColor" );
 		hoverColor = FlatUIUtils.getUIColor( "Slider.hoverColor", focusColor );
 		disabledForeground = UIManager.getColor( "Slider.disabledForeground" );
 	}
@@ -201,7 +201,7 @@ public class FlatSliderUI
 		}
 
 		if( coloredTrack != null ) {
-			g.setColor( slider.hasFocus() ? focusColor : (hover ? hoverColor : thumbColor) );
+			FlatUIUtils.setColor( g, slider.hasFocus() ? focusColor : (hover ? hoverColor : thumbColor), thumbColor );
 			((Graphics2D)g).fill( coloredTrack );
 		}
 
@@ -211,9 +211,10 @@ public class FlatSliderUI
 
 	@Override
 	public void paintThumb( Graphics g ) {
-		g.setColor( slider.isEnabled()
+		FlatUIUtils.setColor( g, slider.isEnabled()
 			? (slider.hasFocus() ? focusColor : (hover ? hoverColor : thumbColor))
-			: disabledForeground );
+			: disabledForeground,
+			thumbColor );
 
 		if( isRoundThumb() )
 			g.fillOval( thumbRect.x, thumbRect.y, thumbRect.width, thumbRect.height );

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

@@ -177,8 +177,7 @@ Separator.foreground=515151
 Slider.trackColor=646464
 Slider.thumbColor=A6A6A6
 Slider.tickColor=888888
-Slider.focusedColor=@@Component.focusColor
-Slider.hoverColor=888888
+Slider.hoverColor=darken(15%,autoInverse)
 Slider.disabledForeground=4c5052
 
 

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

@@ -184,8 +184,7 @@ Separator.foreground=cdcdcd
 Slider.trackColor=c4c4c4
 Slider.thumbColor=6e6e6e
 Slider.tickColor=888888
-Slider.focusedColor=@@Component.focusColor
-Slider.hoverColor=999999
+Slider.hoverColor=lighten(15%,autoInverse)
 Slider.disabledForeground=c0c0c0