Styling: support styling for recently merged changes

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

@@ -139,6 +139,12 @@ public class FlatTableHeaderBorder
 	}
 
 	protected boolean hideTrailingVerticalLine( JTableHeader header ) {
+		if( header.getUI() instanceof FlatTableHeaderUI ) {
+			FlatTableHeaderUI ui = (FlatTableHeaderUI) header.getUI();
+			if( ui.showTrailingVerticalLine )
+				return false;
+		}
+
 		if( showTrailingVerticalLine )
 			return false;
 

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

@@ -86,6 +86,7 @@ public class FlatTableHeaderUI
 	// for FlatTableHeaderBorder
 	@Styleable protected Insets cellMargins;
 	@Styleable protected Color separatorColor;
+	/** @since 2 */ @Styleable protected boolean showTrailingVerticalLine;
 
 	// for FlatAscendingSortIcon and FlatDescendingSortIcon
 	// (needs to be public because icon classes are in another package)

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

@@ -98,7 +98,7 @@ public class FlatTableUI
 {
 	protected boolean showHorizontalLines;
 	protected boolean showVerticalLines;
-	/** @since 1.6 */ protected boolean showTrailingVerticalLine;
+	/** @since 1.6 */ @Styleable protected boolean showTrailingVerticalLine;
 	protected Dimension intercellSpacing;
 
 	@Styleable protected Color selectionBackground;

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyleableInfo.java

@@ -708,6 +708,7 @@ public class TestFlatStyleableInfo
 		FlatTableUI ui = (FlatTableUI) c.getUI();
 
 		Map<String, Class<?>> expected = expectedMap(
+			"showTrailingVerticalLine", boolean.class,
 			"selectionBackground", Color.class,
 			"selectionForeground", Color.class,
 			"selectionInactiveBackground", Color.class,
@@ -735,6 +736,7 @@ public class TestFlatStyleableInfo
 			// FlatTableHeaderBorder
 			"cellMargins", Insets.class,
 			"separatorColor", Color.class,
+			"showTrailingVerticalLine", boolean.class,
 
 			// FlatAscendingSortIcon and FlatDescendingSortIcon
 			"arrowType", String.class,

flatlaf-core/src/test/java/com/formdev/flatlaf/ui/TestFlatStyling.java

@@ -806,6 +806,7 @@ public class TestFlatStyling
 		JTable c = new JTable();
 		FlatTableUI ui = (FlatTableUI) c.getUI();
 
+		ui.applyStyle( "showTrailingVerticalLine: true" );
 		ui.applyStyle( "selectionBackground: #fff" );
 		ui.applyStyle( "selectionForeground: #fff" );
 		ui.applyStyle( "selectionInactiveBackground: #fff" );
@@ -841,6 +842,7 @@ public class TestFlatStyling
 		// FlatTableHeaderBorder
 		ui.applyStyle( "cellMargins: 1,2,3,4" );
 		ui.applyStyle( "separatorColor: #fff" );
+		ui.applyStyle( "showTrailingVerticalLine: true" );
 
 		// FlatAscendingSortIcon and FlatDescendingSortIcon
 		ui.applyStyle( "arrowType: chevron" );