Button: changed styling of default button in "Flat Light" theme (wide blue border instead of blue background)

CHANGELOG.md

@@ -12,6 +12,8 @@ FlatLaf Change Log
 - If a JButton has an icon and no text, then it does not get a minimum width
   (usually 72 pixel) and the left and right insets are same as top/bottom insets
   so that it becomes square (if the icon is square).
+- Changed styling of default button in "Flat Light" theme (wide blue border
+  instead of blue background).
 - Added Java 9 module descriptor `module-info.class` to `flatlaf.jar` (in
   `META-INF/versions/9`). But FlatLaf remains Java 8 compatible. (issue #1)
 - Support specifying custom scale factor in system properties `flatlaf.uiScale`

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

@@ -73,17 +73,17 @@ public class FlatBorder
 			FlatUIUtils.setRenderingHints( g2 );
 
 			float focusWidth = getFocusWidth();
-			float lineWidth = getLineWidth();
+			float borderWidth = getBorderWidth( c );
 			float arc = getArc();
 
 			if( isFocused( c ) ) {
 				g2.setColor( getFocusColor( c ) );
 				FlatUIUtils.paintOutlineBorder( g2, x, y, width, height, focusWidth,
-					lineWidth + scale( (float) innerFocusWidth ), arc );
+					getLineWidth() + scale( (float) innerFocusWidth ), arc );
 			}
 
 			g2.setPaint( getBorderColor( c ) );
-			FlatUIUtils.drawRoundRectangle( g2, x, y, width, height, focusWidth, lineWidth, arc );
+			FlatUIUtils.drawRoundRectangle( g2, x, y, width, height, focusWidth, borderWidth, arc );
 		} finally {
 			g2.dispose();
 		}
@@ -152,6 +152,10 @@ public class FlatBorder
 		return scale( 1f );
 	}
 
+	protected float getBorderWidth( Component c ) {
+		return getLineWidth();
+	}
+
 	protected float getArc() {
 		return 0;
 	}

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

@@ -37,6 +37,7 @@ import javax.swing.plaf.UIResource;
  * @uiDefault Button.default.hoverBorderColor	Color	optional
  * @uiDefault Button.default.focusedBorderColor	Color
  * @uiDefault Button.default.focusColor			Color
+ * @uiDefault Button.default.borderWidth		int
  * @uiDefault Button.arc						int
  *
  * @author Karl Tauber
@@ -52,6 +53,7 @@ public class FlatButtonBorder
 	protected final Color defaultHoverBorderColor = UIManager.getColor( "Button.default.hoverBorderColor" );
 	protected final Color defaultFocusedBorderColor = UIManager.getColor( "Button.default.focusedBorderColor" );
 	protected final Color defaultFocusColor = UIManager.getColor( "Button.default.focusColor" );
+	protected final int defaultBorderWidth = UIManager.getInt( "Button.default.borderWidth" );
 	protected final int arc = UIManager.getInt( "Button.arc" );
 
 	@Override
@@ -87,6 +89,11 @@ public class FlatButtonBorder
 		return insets;
 	}
 
+	@Override
+	protected float getBorderWidth( Component c ) {
+		return FlatButtonUI.isDefaultButton( c ) ? scale( (float) defaultBorderWidth ) : super.getBorderWidth( c );
+	}
+
 	@Override
 	protected float getArc() {
 		return scale( (float) arc );

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

@@ -79,6 +79,7 @@ Button.default.borderColor=4c708c
 Button.default.hoverBorderColor=537699
 Button.default.focusedBorderColor=537699
 Button.default.focusColor=43688c
+Button.default.boldText=true
 
 Button.toolbar.hoverBackground=4c5052
 Button.toolbar.pressedBackground=555a5d

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

@@ -22,6 +22,15 @@
 
 Button.focusedBackground=null
 
+Button.default.background=4A86C7
+Button.default.foreground=f0f0f0
+Button.default.focusedBackground=null
+Button.default.hoverBackground=5B91CC
+Button.default.pressedBackground=6E9ED2
+Button.default.borderColor=3167ad
+Button.default.hoverBorderColor=a8cef6
+Button.default.focusedBorderColor=a8cef6
+Button.default.focusColor=97c3f3
 Button.default.boldText=true
 
 

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

@@ -70,6 +70,8 @@ Button.iconTextGap=4
 Button.rollover=true
 Button.defaultButtonFollowsFocus=false
 
+Button.default.borderWidth=1
+
 
 #---- CheckBox ----
 

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

@@ -72,14 +72,16 @@ Button.disabledBorderColor=cfcfcf
 Button.focusedBorderColor=87afda
 Button.hoverBorderColor=@@Button.focusedBorderColor
 
-Button.default.background=4A86C7
-Button.default.foreground=f0f0f0
-Button.default.hoverBackground=5B91CC
-Button.default.pressedBackground=6E9ED2
-Button.default.borderColor=3167ad
-Button.default.hoverBorderColor=a8cef6
-Button.default.focusedBorderColor=a8cef6
-Button.default.focusColor=97c3f3
+Button.default.background=@@Button.background
+Button.default.foreground=@foreground
+Button.default.focusedBackground=@@Button.focusedBackground
+Button.default.hoverBackground=@@Button.hoverBackground
+Button.default.pressedBackground=@@Button.pressedBackground
+Button.default.borderColor=4D89C9
+Button.default.hoverBorderColor=@@Button.hoverBorderColor
+Button.default.focusedBorderColor=@@Button.focusedBorderColor
+Button.default.focusColor=@@Component.focusColor
+Button.default.borderWidth=2
 
 Button.toolbar.hoverBackground=dfdfdf
 Button.toolbar.pressedBackground=d8d8d8