Add info message for when opaque buffering is used.

Fix loglevel selector for demos not working.

core/src/main/java/com/github/weisj/darklaf/graphics/StringPainter.java

@@ -29,6 +29,7 @@ import java.awt.image.BufferedImage;
 import java.awt.image.FilteredImageSource;
 import java.awt.image.ImageFilter;
 import java.lang.reflect.Field;
+import java.util.logging.Logger;
 
 import javax.swing.*;
 import javax.swing.plaf.basic.BasicHTML;
@@ -41,6 +42,8 @@ import com.github.weisj.darklaf.util.*;
 
 public class StringPainter {
 
+    private static final Logger LOGGER = LogUtil.getLogger(StringPainter.class);
+
     private static boolean translucentAAPaintingEnabled = true;
     private static boolean experimentalAntialiasingEnabled = false;
 
@@ -146,6 +149,7 @@ public class StringPainter {
         boolean paintOpaqueBuffered = window != null;
 
         if (paintOpaqueBuffered) {
+            LOGGER.fine(() -> "Using opaque buffering for " + c);
             double scaleX = Scale.getScaleX((Graphics2D) g);
             double scaleY = Scale.getScaleX((Graphics2D) g);
 

core/src/test/java/ui/ComponentDemo.java

@@ -188,6 +188,7 @@ public interface ComponentDemo {
         Level currentLevel = LafManager.getLogLevel();
         for (Level level : levels) {
             JRadioButtonMenuItem mi = new JRadioButtonMenuItem(level.getName());
+            mi.addActionListener(e -> LafManager.setLogLevel(level));
             bg.add(mi);
             logging.add(mi);
             if (level.equals(currentLevel)) {