Typography:

- fixed semibold font on Ubuntu
- use font "Montserrat SemiBold" on Fedora

(PR #396)

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

@@ -1324,9 +1324,19 @@ public abstract class FlatLaf
 			}
 
 			// derive font
-			if( newStyle != baseStyle || newSize != baseSize )
+			if( newStyle != baseStyle || newSize != baseSize ) {
+				// hack for font "Ubuntu Medium" on Linux, which curiously belongs
+				// to family "Ubuntu Light" and using deriveFont() would create a light font
+				if( "Ubuntu Medium".equalsIgnoreCase( baseFont.getName() ) &&
+					"Ubuntu Light".equalsIgnoreCase( baseFont.getFamily() ) )
+				{
+					Font font = createCompositeFont( "Ubuntu Medium", newStyle, newSize );
+					if( !isFallbackFont( font ) )
+						return toUIResource( font );
+				}
+
 				return toUIResource( baseFont.deriveFont( newStyle, newSize ) );
-			else
+			} else
 				return toUIResource( baseFont );
 		}
 

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

@@ -58,7 +58,7 @@ mini.font = -3
 [mac]semibold.font = "HelveticaNeue-Medium"
 #  Linux
 [linux]light.font = "Lato Light", "Ubuntu Light", "Cantarell Light"
-[linux]semibold.font = "Lato Semibold", "Ubuntu Medium"
+[linux]semibold.font = "Lato Semibold", "Ubuntu Medium", "Montserrat SemiBold"
 #  fallback for unknown platform
 light.font = +0
 semibold.font = +0

flatlaf-testing/src/main/java/com/formdev/flatlaf/testing/FlatFontsTest.java

@@ -86,6 +86,7 @@ public class FlatFontsTest
 		for( Map.Entry<String, Font> e : info.fonts.entrySet() ) {
 			JLabel label = new JLabel( e.getKey() );
 			label.setFont( e.getValue().deriveFont( (float) UIScale.scale( 36 ) ) );
+			label.setToolTipText( e.getValue().toString() );
 			previewPanel.add( label, "wrap" );
 		}