Adding missing file.

src/net/sf/freecol/client/gui/plaf/FreeColMenuUI.java

@@ -0,0 +1,103 @@
+/**
+ *  Copyright (C) 2002-2022   The FreeCol Team
+ *
+ *  This file is part of FreeCol.
+ *
+ *  FreeCol is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  FreeCol is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with FreeCol.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.sf.freecol.client.gui.plaf;
+
+import java.awt.Graphics;
+import java.awt.Graphics2D;
+import java.awt.Insets;
+
+import javax.swing.BorderFactory;
+import javax.swing.JComponent;
+import javax.swing.JMenuBar;
+import javax.swing.event.AncestorEvent;
+import javax.swing.event.AncestorListener;
+import javax.swing.plaf.ComponentUI;
+import javax.swing.plaf.basic.BasicMenuUI;
+
+import net.sf.freecol.client.gui.FontLibrary;
+import net.sf.freecol.client.gui.ImageLibrary;
+import net.sf.freecol.client.gui.panel.FreeColImageBorder;
+import net.sf.freecol.common.util.ImageUtils;
+
+
+/**
+ * UI-class for menu items.
+ */
+public class FreeColMenuUI extends BasicMenuUI {
+
+    private AncestorListener ancestorListener = createAncestorListener();
+    private boolean topLevelMenuItem = false;
+    
+    public static ComponentUI createUI(@SuppressWarnings("unused") JComponent c) {
+        return new FreeColMenuUI();
+    }
+
+
+    @Override
+    public void installUI(JComponent c) {
+        super.installUI(c);
+
+        c.addAncestorListener(ancestorListener);
+        
+        c.setOpaque(false);
+    }
+
+    @Override
+    public void paint(Graphics g, JComponent c) {
+        LAFUtilities.setProperties(g, c);
+
+        if (topLevelMenuItem) {
+            final Insets insets = c.getInsets();
+            ImageUtils.fillTexture(((Graphics2D) g),
+                    ImageLibrary.getMenuBackground(),
+                    insets.left,
+                    insets.top,
+                    c.getWidth() - insets.right - insets.left,
+                    c.getHeight() - insets.top - insets.bottom);
+        }
+        
+        super.paint(g, c);
+    }
+    
+    private AncestorListener createAncestorListener() {
+        return new AncestorListener() {
+            @Override
+            public void ancestorRemoved(AncestorEvent event) {}
+            
+            @Override
+            public void ancestorMoved(AncestorEvent event) {}
+            
+            @Override
+            public void ancestorAdded(AncestorEvent event) {
+                final JComponent c = event.getComponent();
+                if (c.getParent() instanceof JMenuBar) {
+                    final int padding = (int) (2 * FontLibrary.getFontScaling());
+                    c.setBorder(BorderFactory.createCompoundBorder(
+                            BorderFactory.createEmptyBorder(padding, padding, padding, padding),
+                            FreeColImageBorder.simpleButtonBorder));
+                    topLevelMenuItem = true;
+                } else {
+                    c.setBorder(null);
+                    topLevelMenuItem = false;
+                }
+            }
+        };
+    } 
+}