CheckBox: changed CheckBox.arc from radius to diameter to be consistent with Button.arc and Component.arc

CHANGELOG.md

@@ -4,6 +4,8 @@ FlatLaf Change Log
 ## Unreleased
 
 - TabbedPane: Support background color for selected tabs.
+- CheckBox: changed `CheckBox.arc` from radius to diameter to be consistent with
+  `Button.arc` and `Component.arc`
 
 
 ## 0.21

flatlaf-core/src/main/java/com/formdev/flatlaf/icons/FlatCheckBoxIcon.java

@@ -133,17 +133,17 @@ public class FlatCheckBoxIcon
 	protected void paintFocusBorder( Graphics2D g2 ) {
 		// the outline focus border is painted outside of the icon
 		int wh = ICON_SIZE - 1 + (focusWidth * 2);
-		int arcwh = (arc + focusWidth) * 2;
+		int arcwh = arc + (focusWidth * 2);
 		g2.fillRoundRect( -focusWidth + 1, -focusWidth, wh, wh, arcwh, arcwh );
 	}
 
 	protected void paintBorder( Graphics2D g2 ) {
-		int arcwh = arc * 2;
+		int arcwh = arc;
 		g2.fillRoundRect( 1, 0, 14, 14, arcwh, arcwh );
 	}
 
 	protected void paintBackground( Graphics2D g2 ) {
-		int arcwh = (arc * 2) - 1;
+		int arcwh = arc - 1;
 		g2.fillRoundRect( 2, 1, 12, 12, arcwh, arcwh );
 	}
 

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

@@ -102,7 +102,7 @@ Button.default.borderWidth=1
 
 CheckBox.border=com.formdev.flatlaf.ui.FlatMarginBorder
 CheckBox.icon=com.formdev.flatlaf.icons.FlatCheckBoxIcon
-CheckBox.arc=2
+CheckBox.arc=4
 CheckBox.margin=2,2,2,2
 CheckBox.iconTextGap=4
 CheckBox.rollover=true