Enable changing of spinner values through mouse wheel rotation.

core/src/main/java/com/github/weisj/darklaf/ui/spinner/DarkSpinnerListener.java

@@ -22,15 +22,13 @@
 package com.github.weisj.darklaf.ui.spinner;
 
 import java.awt.*;
-import java.awt.event.FocusEvent;
-import java.awt.event.FocusListener;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
+import java.awt.event.*;
 import java.beans.PropertyChangeEvent;
 import java.beans.PropertyChangeListener;
 
 import javax.swing.*;
 
+import com.github.weisj.darklaf.util.DarkUIUtil;
 import com.github.weisj.darklaf.util.PropertyKey;
 
 public class DarkSpinnerListener extends MouseAdapter
@@ -97,4 +95,16 @@ public class DarkSpinnerListener extends MouseAdapter
             ui.updateBackground();
         }
     }
+
+    @Override
+    public void mouseWheelMoved(final MouseWheelEvent e) {
+        super.mouseWheelMoved(e);
+        if (!DarkUIUtil.hasFocus(spinner)) return;
+        int rotation = e.getWheelRotation();
+        if (rotation > 0) {
+            spinner.setValue(spinner.getPreviousValue());
+        } else if (rotation < 0) {
+            spinner.setValue(spinner.getNextValue());
+        }
+    }
 }

core/src/main/java/com/github/weisj/darklaf/ui/spinner/DarkSpinnerUI.java

@@ -91,6 +91,7 @@ public class DarkSpinnerUI extends BasicSpinnerUI implements SpinnerConstants {
         super.installListeners();
         spinnerListener = createSpinnerListener();
         spinner.addMouseListener(spinnerListener);
+        spinner.addMouseWheelListener(spinnerListener);
         spinner.addPropertyChangeListener(spinnerListener);
     }
 
@@ -105,6 +106,7 @@ public class DarkSpinnerUI extends BasicSpinnerUI implements SpinnerConstants {
             editor.getComponents()[0].removeFocusListener(spinnerListener);
         }
         spinner.removeMouseListener(spinnerListener);
+        spinner.removeMouseWheelListener(spinnerListener);
         spinner.removePropertyChangeListener(spinnerListener);
         spinnerListener = null;
     }

core/src/main/resources/com/github/weisj/darklaf/properties/platform/mac.properties

@@ -24,6 +24,7 @@
 #
 # suppress inspection "UnusedProperty" for whole file
 #
+macos.coloredTitleBar                    = true
 ScrollBarUI                              = com.github.weisj.darklaf.ui.scrollpane.DarkMacScrollBarUI
 ScrollBar.smallWidth                     = 10
 ScrollBar.width                          = 12