Slider: fixed painting of colored track if JSlider.inverted is true

CHANGELOG.md

@@ -21,6 +21,7 @@ FlatLaf Change Log
 
 #### Fixed bugs
 
+- Slider: Fixed painting of colored track if `JSlider.inverted` is `true`.
 - Table and TableHeader: Fixed missing right vertical grid line if using table
   as row header in scroll pane. (issues #152 and #46)
 - TableHeader: Fixed position of column separators in right-to-left component

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

@@ -279,6 +279,12 @@ debug*/
 		}
 
 		if( coloredTrack != null ) {
+			if( slider.getInverted() ) {
+				RoundRectangle2D temp = track;
+				track = coloredTrack;
+				coloredTrack = temp;
+			}
+
 			g.setColor( trackValueColor );
 			((Graphics2D)g).fill( coloredTrack );
 		}