content: /*
   * Copyright 2019 FormDev Software GmbH
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package themeengine.include.com.formdev.flatlaf.ui;
  
  import java.awt.event.ActionEvent;
  import javax.swing.AbstractAction;
  import javax.swing.ActionMap;
  import javax.swing.JComponent;
  import javax.swing.JMenu;
  import javax.swing.JMenuBar;
  import javax.swing.MenuElement;
  import javax.swing.MenuSelectionManager;
  import javax.swing.SwingUtilities;
  import javax.swing.plaf.ActionMapUIResource;
  import javax.swing.plaf.ComponentUI;
  import javax.swing.plaf.basic.BasicMenuBarUI;
  import themeengine.include.com.formdev.flatlaf.FlatLaf;
  import themeengine.include.com.formdev.flatlaf.util.SystemInfo;
  
  /**
   * Provides the Flat LaF UI delegate for {@link javax.swing.JMenuBar}.
   *
   * <!-- BasicMenuBarUI -->
   *
   * @uiDefault MenuBar.font								Font
   * @uiDefault MenuBar.background						Color
   * @uiDefault MenuBar.foreground						Color
   * @uiDefault MenuBar.border							Border
   *
   * @author Karl Tauber
   */
  public class FlatMenuBarUI
  	extends BasicMenuBarUI
  {
  	public static ComponentUI createUI( JComponent c ) {
  		return new FlatMenuBarUI();
  	}
  
  	/*
  	 * WARNING: This class is not used on macOS if screen menu bar is enabled.
  	 *          Do not add any functionality here.
  	 */
  
  	@Override
  	protected void installKeyboardActions() {
  		super.installKeyboardActions();
  
  		ActionMap map = SwingUtilities.getUIActionMap( menuBar );
  		if( map == null ) {
  			map = new ActionMapUIResource();
  			SwingUtilities.replaceUIActionMap( menuBar, map );
  		}
  		map.put( "takeFocus", new TakeFocus() );
  	}
  
  	//---- class TakeFocus ----------------------------------------------------
  
  	/**
  	 * Activates the menu bar and shows mnemonics.
  	 * On Windows, the popup of the first menu is not shown.
  	 * On other platforms, the popup of the first menu is shown.
  	 */
  	private static class TakeFocus
  		extends AbstractAction
  	{
  		@Override
  		public void actionPerformed( ActionEvent e ) {
  			JMenuBar menuBar = (JMenuBar) e.getSource();
  			JMenu menu = menuBar.getMenu( 0 );
  			if( menu != null ) {
  				MenuSelectionManager.defaultManager().setSelectedPath( SystemInfo.isWindows
  					? new MenuElement[] { menuBar, menu }
  					: new MenuElement[] { menuBar, menu, menu.getPopupMenu() } );
  
  				FlatLaf.showMnemonics( menuBar );
  			}
  		}
  	}
  }
  