Add MouseWheel support

forge-gui-desktop/src/main/java/forge/gui/MenuScroller.java

@@ -10,6 +10,9 @@ import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.awt.event.MouseWheelEvent;
+import java.awt.event.MouseWheelListener;
+
 import javax.swing.Icon;
 import javax.swing.JComponent;
 import javax.swing.JMenu;
@@ -295,6 +298,7 @@ public class MenuScroller {
 
     this.menu = menu;
     menu.addPopupMenuListener(menuListener);
+    menu.addMouseWheelListener(new MouseScrollListener());
   }
 
   /**
@@ -586,4 +590,12 @@ public class MenuScroller {
       return 10;
     }
   }
+
+  private class MouseScrollListener implements MouseWheelListener {
+      public void mouseWheelMoved(MouseWheelEvent mwe){
+          firstIndex += mwe.getWheelRotation();
+          refreshMenu();
+          mwe.consume();
+      }
+  }
 }

forge-gui-desktop/src/main/java/forge/screens/match/CMatchUI.java

@@ -908,6 +908,7 @@ public final class CMatchUI
         //show menu if mouse was trigger for ability
         final JPopupMenu menu = new JPopupMenu(Localizer.getInstance().getMessage("lblAbilities"));
         //add scroll area when too big
+        // TODO: do we need a user setting for the scrollCount?
         MenuScroller.setScrollerFor(menu, 8, 125, 3, 1);
 
         boolean enabled;