1 /*
   2  * Copyright (c) 2000, 2006, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.java.swing.plaf.windows;
  27 
  28 import java.awt.Component;
  29 import java.awt.Container;
  30 import java.awt.Event;
  31 import java.awt.KeyEventPostProcessor;
  32 import java.awt.Window;


  33 
  34 import java.awt.event.ActionEvent;
  35 import java.awt.event.KeyEvent;
  36 
  37 import javax.swing.AbstractAction;
  38 import javax.swing.ActionMap;
  39 import javax.swing.InputMap;
  40 import javax.swing.KeyStroke;
  41 import javax.swing.JComponent;
  42 import javax.swing.JLabel;
  43 import javax.swing.JRootPane;
  44 import javax.swing.SwingUtilities;
  45 import javax.swing.UIManager;
  46 import javax.swing.AbstractButton;
  47 import javax.swing.JFrame;
  48 import javax.swing.JMenu;
  49 import javax.swing.JMenuBar;
  50 import javax.swing.MenuElement;
  51 import javax.swing.MenuSelectionManager;
  52 
  53 import javax.swing.plaf.ActionMapUIResource;
  54 import javax.swing.plaf.ComponentUI;
  55 import javax.swing.plaf.InputMapUIResource;
  56 
  57 import javax.swing.plaf.basic.BasicRootPaneUI;
  58 import javax.swing.plaf.basic.ComboPopup;
  59 
  60 /**
  61  * Windows implementation of RootPaneUI, there is one shared between all
  62  * JRootPane instances.
  63  *
  64  * @author Mark Davidson
  65  * @since 1.4
  66  */
  67 public class WindowsRootPaneUI extends BasicRootPaneUI {
  68 
  69     private final static WindowsRootPaneUI windowsRootPaneUI = new WindowsRootPaneUI();
  70     static final AltProcessor altProcessor = new AltProcessor();
  71 
  72     public static ComponentUI createUI(JComponent c) {
  73         return windowsRootPaneUI;
  74     }
  75 
  76     static class AltProcessor implements KeyEventPostProcessor {
  77         static boolean altKeyPressed = false;
  78         static boolean menuCanceledOnPress = false;
  79         static JRootPane root = null;
  80         static Window winAncestor = null;
  81 
  82         void altPressed(KeyEvent ev) {
  83             MenuSelectionManager msm =
  84                 MenuSelectionManager.defaultManager();
  85             MenuElement[] path = msm.getSelectedPath();
  86             if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
  87                 msm.clearSelectedPath();
  88                 menuCanceledOnPress = true;
  89                 ev.consume();
  90             } else if(path.length > 0) { // We are in ComboBox
  91                 menuCanceledOnPress = false;
  92                 WindowsLookAndFeel.setMnemonicHidden(false);
  93                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
  94                 ev.consume();
  95             } else {
  96                 menuCanceledOnPress = false;
  97                 WindowsLookAndFeel.setMnemonicHidden(false);
  98                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
  99                 JMenuBar mbar = root != null ? root.getJMenuBar() : null;
 100                 if(mbar == null && winAncestor instanceof JFrame) {
 101                     mbar = ((JFrame)winAncestor).getJMenuBar();
 102                 }
 103                 JMenu menu = mbar != null ? mbar.getMenu(0) : null;
 104                 if(menu != null) {
 105                     ev.consume();
 106                 }
 107             }
 108         }
 109 
 110         void altReleased(KeyEvent ev) {
 111             if (menuCanceledOnPress) {
 112                 WindowsLookAndFeel.setMnemonicHidden(true);
 113                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 114                 return;
 115             }
 116 
 117             MenuSelectionManager msm =
 118                 MenuSelectionManager.defaultManager();
 119             if (msm.getSelectedPath().length == 0) {
 120                 // if no menu is active, we try activating the menubar
 121 
 122                 JMenuBar mbar = root != null ? root.getJMenuBar() : null;
 123                 if(mbar == null && winAncestor instanceof JFrame) {
 124                     mbar = ((JFrame)winAncestor).getJMenuBar();
 125                 }
 126                 JMenu menu = mbar != null ? mbar.getMenu(0) : null;
 127 
 128                 if (menu != null) {












 129                     MenuElement[] path = new MenuElement[2];
 130                     path[0] = mbar;
 131                     path[1] = menu;
 132                     msm.setSelectedPath(path);
 133                 } else if(!WindowsLookAndFeel.isMnemonicHidden()) {
 134                     WindowsLookAndFeel.setMnemonicHidden(true);
 135                     WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 136                 }
 137             } else {
 138                 if((msm.getSelectedPath())[0] instanceof ComboPopup) {
 139                     WindowsLookAndFeel.setMnemonicHidden(true);
 140                     WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 141                 }
 142             }
 143 
 144         }
 145 
 146         public boolean postProcessKeyEvent(KeyEvent ev) {
 147             if(ev.isConsumed()) {
 148                 // do not manage consumed event
 149                 return false;
 150             }
 151             if (ev.getKeyCode() == KeyEvent.VK_ALT) {
 152                 root = SwingUtilities.getRootPane(ev.getComponent());
 153                 winAncestor = (root == null ? null :
 154                         SwingUtilities.getWindowAncestor(root));
 155 
 156                 if (ev.getID() == KeyEvent.KEY_PRESSED) {
 157                     if (!altKeyPressed) {
 158                         altPressed(ev);
 159                     }
 160                     altKeyPressed = true;
 161                     return true;
 162                 } else if (ev.getID() == KeyEvent.KEY_RELEASED) {
 163                     if (altKeyPressed) {
 164                         altReleased(ev);
 165                     } else {
 166                         MenuSelectionManager msm =
 167                             MenuSelectionManager.defaultManager();
 168                         MenuElement[] path = msm.getSelectedPath();
 169                         if (path.length <= 0) {
 170                             WindowsLookAndFeel.setMnemonicHidden(true);
 171                             WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 172                         }
 173                     }
 174                     altKeyPressed = false;
 175                 }
 176                 root = null;
 177                 winAncestor = null;
 178             } else {
 179                 altKeyPressed = false;
 180             }
 181             return false;
 182         }
 183     }
 184 }
--- EOF ---