1. /*

  2.  * @(#)WindowsPopupMenuUI.java	1.19 03/01/23

  3.  *

  4.  * Copyright 2003 Sun Microsystems, Inc. All rights reserved.

  5.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  6.  */

  7. 

  8. package com.sun.java.swing.plaf.windows;

  9. 

  10. import java.awt.Component;

  11. import java.awt.KeyEventPostProcessor;

  12. import java.awt.KeyboardFocusManager;

  13. import java.awt.event.KeyEvent;

  14. import javax.swing.*;

  15. import javax.swing.event.*;

  16. import javax.swing.plaf.*;

  17. import javax.swing.plaf.basic.*;

  18. 

  19. 

  20. /**

  21.  * Windows rendition of the component.

  22.  * <p>

  23.  * <strong>Warning:</strong>

  24.  * Serialized objects of this class will not be compatible with

  25.  * future Swing releases.  The current serialization support is appropriate

  26.  * for short term storage or RMI between applications running the same

  27.  * version of Swing.  A future release of Swing will provide support for

  28.  * long term persistence.

  29.  */

  30. public class WindowsPopupMenuUI extends BasicPopupMenuUI {

  31. 

  32.     static MnemonicListener mnemonicListener = null;

  33. 

  34.     public static ComponentUI createUI(JComponent c) {

  35. 	return new WindowsPopupMenuUI();

  36.     }

  37. 

  38.     public void installListeners() {

  39.         super.installListeners();

  40. 	if (! UIManager.getBoolean("Button.showMnemonics") &&

  41.             mnemonicListener == null) {

  42. 

  43.             mnemonicListener = new MnemonicListener();

  44.             MenuSelectionManager.defaultManager().

  45.                 addChangeListener(mnemonicListener);

  46.         }

  47.     }

  48. 

  49.     /**

  50.      * Returns the <code>Popup</code> that will be responsible for

  51.      * displaying the <code>JPopupMenu</code>.

  52.      *

  53.      * @param popupMenu JPopupMenu requesting Popup

  54.      * @param x     Screen x location Popup is to be shown at

  55.      * @param y     Screen y location Popup is to be shown at.

  56.      * @return Popup that will show the JPopupMenu

  57.      * @since 1.4

  58.      */

  59.     public Popup getPopup(JPopupMenu popupMenu, int x, int y) {

  60.         PopupFactory popupFactory = PopupFactory.getSharedInstance();

  61.         return popupFactory.getPopup(popupMenu.getInvoker(), popupMenu, x, y);

  62.     }

  63. 

  64.     static class MnemonicListener implements ChangeListener {

  65.         JRootPane repaintRoot = null;

  66. 

  67.         public void stateChanged(ChangeEvent ev) {

  68. 	    MenuSelectionManager msm = (MenuSelectionManager)ev.getSource();

  69.             MenuElement[] path = msm.getSelectedPath();

  70.             if (path.length == 0) {

  71.                 // menu was canceled -- hide mnemonics

  72.                 WindowsLookAndFeel.setMnemonicHidden(true);

  73.                 if (repaintRoot != null) repaintRoot.repaint();

  74.             } else {

  75.                 Component c = (Component)path[0];

  76.                 if (c instanceof JPopupMenu) c = ((JPopupMenu)c).getInvoker();

  77.                 repaintRoot = SwingUtilities.getRootPane(c);

  78.             }

  79.         }

  80.     }

  81. }