Table: hide grid and changed intercell spacing to zero

CHANGELOG.md

@@ -7,6 +7,7 @@ FlatLaf Change Log
   "IntelliJ Light Theme", which provides blue coloring that better match
   platform colors.
 - Tree: Support wide selection (enabled by default).
+- Table: Hide grid and changed intercell spacing to zero.
 - List and Tree: Paint cell focus indicator (black rectangle) only if more than
   one item is selected.
 - Fixed link color (in HTML text) and separator color in IntelliJ platform

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

@@ -203,7 +203,7 @@ class UIDefaultsLoader
 		return resolveValue( properties, newValue );
 	}
 
-	private enum ValueType { UNKNOWN, STRING, INTEGER, BORDER, ICON, INSETS, SIZE, COLOR, SCALEDINTEGER, INSTANCE, CLASS }
+	private enum ValueType { UNKNOWN, STRING, INTEGER, BORDER, ICON, INSETS, DIMENSION, COLOR, SCALEDINTEGER, INSTANCE, CLASS }
 
 	static Object parseValue( String key, String value ) {
 		return parseValue( key, value, v -> v, Collections.emptyList() );
@@ -251,7 +251,7 @@ class UIDefaultsLoader
 					 key.endsWith( "Margins" ) || key.endsWith( "Insets" ) )
 				valueType = ValueType.INSETS;
 			else if( key.endsWith( "Size" ) )
-				valueType = ValueType.SIZE;
+				valueType = ValueType.DIMENSION;
 			else if( key.endsWith( "Width" ) || key.endsWith( "Height" ) )
 				valueType = ValueType.INTEGER;
 			else if( key.endsWith( "UI" ) )
@@ -265,7 +265,7 @@ class UIDefaultsLoader
 			case BORDER:		return parseBorder( value, resolver, addonClassLoaders );
 			case ICON:			return parseInstance( value, addonClassLoaders );
 			case INSETS:		return parseInsets( value );
-			case SIZE:			return parseSize( value );
+			case DIMENSION:		return parseDimension( value );
 			case COLOR:			return parseColorOrFunction( value, true );
 			case SCALEDINTEGER:	return parseScaledInteger( value );
 			case INSTANCE:		return parseInstance( value, addonClassLoaders );
@@ -358,7 +358,7 @@ class UIDefaultsLoader
 		}
 	}
 
-	private static Dimension parseSize( String value ) {
+	private static Dimension parseDimension( String value ) {
 		List<String> numbers = StringUtils.split( value, ',' );
 		try {
 			return new DimensionUIResource(

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

@@ -17,6 +17,7 @@
 package com.formdev.flatlaf.ui;
 
 import java.awt.Color;
+import java.awt.Dimension;
 import java.awt.event.FocusEvent;
 import java.awt.event.FocusListener;
 import javax.swing.JComponent;
@@ -55,6 +56,8 @@ import com.formdev.flatlaf.util.UIScale;
  * <!-- FlatTableUI -->
  *
  * @uiDefault Table.rowHeight						int
+ * @uiDefault Table.showGrid						boolean
+ * @uiDefault Table.intercellSpacing				Dimension
  * @uiDefault Table.selectionInactiveBackground		Color
  * @uiDefault Table.selectionInactiveForeground		Color
  *
@@ -63,19 +66,39 @@ import com.formdev.flatlaf.util.UIScale;
 public class FlatTableUI
 	extends BasicTableUI
 {
+	protected boolean showGrid;
+	protected Dimension intercellSpacing;
+
 	protected Color selectionBackground;
 	protected Color selectionForeground;
 	protected Color selectionInactiveBackground;
 	protected Color selectionInactiveForeground;
 
+	private boolean oldShowHorizontalLines;
+	private boolean oldShowVerticalLines;
+	private Dimension oldIntercellSpacing;
+
 	public static ComponentUI createUI( JComponent c ) {
 		return new FlatTableUI();
 	}
 
+	@Override
+	public void installUI( JComponent c ) {
+		super.installUI( c );
+	}
+
+	@Override
+	public void uninstallUI( JComponent c ) {
+		super.uninstallUI( c );
+	}
+
 	@Override
 	protected void installDefaults() {
 		super.installDefaults();
 
+		showGrid = UIManager.getBoolean( "Table.showGrid" );
+		intercellSpacing = UIManager.getDimension( "Table.intercellSpacing" );
+
 		selectionBackground = UIManager.getColor( "Table.selectionBackground" );
 		selectionForeground = UIManager.getColor( "Table.selectionForeground" );
 		selectionInactiveBackground = UIManager.getColor( "Table.selectionInactiveBackground" );
@@ -86,6 +109,17 @@ public class FlatTableUI
 		int rowHeight = FlatUIUtils.getUIInt( "Table.rowHeight", 16 );
 		if( rowHeight > 0 )
 			LookAndFeel.installProperty( table, "rowHeight", UIScale.scale( rowHeight ) );
+
+		if( !showGrid ) {
+			oldShowHorizontalLines = table.getShowHorizontalLines();
+			oldShowVerticalLines = table.getShowVerticalLines();
+			table.setShowGrid( false );
+		}
+
+		if( intercellSpacing != null ) {
+			oldIntercellSpacing = table.getIntercellSpacing();
+			table.setIntercellSpacing( intercellSpacing );
+		}
 	}
 
 	@Override
@@ -96,6 +130,20 @@ public class FlatTableUI
 		selectionForeground = null;
 		selectionInactiveBackground = null;
 		selectionInactiveForeground = null;
+
+		// restore old show grid
+		if( !showGrid ) {
+			if( !table.getShowHorizontalLines() )
+				table.setShowHorizontalLines( oldShowHorizontalLines );
+			if( !table.getShowVerticalLines() )
+				table.setShowVerticalLines( oldShowVerticalLines );
+		}
+
+		// restore old intercell spacing
+		if( intercellSpacing != null ) {
+			if( table.getIntercellSpacing().equals( intercellSpacing ) )
+				table.setIntercellSpacing( oldIntercellSpacing );
+		}
 	}
 
 	@Override

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

@@ -366,6 +366,8 @@ TabbedPane.shadow=@@ComboBox.buttonArrowColor
 #---- Table ----
 
 Table.rowHeight=20
+Table.showGrid=false
+Table.intercellSpacing={dimension}0,0
 Table.scrollPaneBorder=com.formdev.flatlaf.ui.FlatBorder
 Table.ascendingSortIcon=com.formdev.flatlaf.icons.FlatAscendingSortIcon
 Table.descendingSortIcon=com.formdev.flatlaf.icons.FlatDescendingSortIcon