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 import java.awt.Toolkit;
  34 
  35 import sun.awt.AWTAccessor;
  36 import sun.awt.SunToolkit;
  37 
  38 import java.awt.event.ActionEvent;
  39 import java.awt.event.KeyEvent;
  40 
  41 import javax.swing.AbstractAction;
  42 import javax.swing.ActionMap;
  43 import javax.swing.InputMap;
  44 import javax.swing.KeyStroke;
  45 import javax.swing.JComponent;
  46 import javax.swing.JLabel;
  47 import javax.swing.JRootPane;
  48 import javax.swing.SwingUtilities;
  49 import javax.swing.UIManager;
  50 import javax.swing.AbstractButton;
  51 import javax.swing.JFrame;
  52 import javax.swing.JMenu;
  53 import javax.swing.JMenuBar;
  54 import javax.swing.MenuElement;
  55 import javax.swing.MenuSelectionManager;
  56 
  57 import javax.swing.plaf.ActionMapUIResource;
  58 import javax.swing.plaf.ComponentUI;
  59 import javax.swing.plaf.InputMapUIResource;
  60 
  61 import javax.swing.plaf.basic.BasicRootPaneUI;
  62 import javax.swing.plaf.basic.ComboPopup;
  63 
  64 /**
  65  * Windows implementation of RootPaneUI, there is one shared between all
  66  * JRootPane instances.
  67  *
  68  * @author Mark Davidson
  69  * @since 1.4
  70  */
  71 public class WindowsRootPaneUI extends BasicRootPaneUI {
  72 
  73     private final static WindowsRootPaneUI windowsRootPaneUI = new WindowsRootPaneUI();
  74     static final AltProcessor altProcessor = new AltProcessor();
  75 
  76     public static ComponentUI createUI(JComponent c) {
  77         return windowsRootPaneUI;
  78     }
  79 
  80     static class AltProcessor implements KeyEventPostProcessor {
  81         static boolean altKeyPressed = false;
  82         static boolean menuCanceledOnPress = false;
  83         static JRootPane root = null;
  84         static Window winAncestor = null;
  85 
  86         void altPressed(KeyEvent ev) {
  87             MenuSelectionManager msm =
  88                 MenuSelectionManager.defaultManager();
  89             MenuElement[] path = msm.getSelectedPath();
  90             if (path.length > 0 && ! (path[0] instanceof ComboPopup)) {
  91                 msm.clearSelectedPath();
  92                 menuCanceledOnPress = true;
  93                 ev.consume();
  94             } else if(path.length > 0) { // We are in ComboBox
  95                 menuCanceledOnPress = false;
  96                 WindowsLookAndFeel.setMnemonicHidden(false);
  97                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
  98                 ev.consume();
  99             } else {
 100                 menuCanceledOnPress = false;
 101                 WindowsLookAndFeel.setMnemonicHidden(false);
 102                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 103                 JMenuBar mbar = root != null ? root.getJMenuBar() : null;
 104                 if(mbar == null && winAncestor instanceof JFrame) {
 105                     mbar = ((JFrame)winAncestor).getJMenuBar();
 106                 }
 107                 JMenu menu = mbar != null ? mbar.getMenu(0) : null;
 108                 if(menu != null) {
 109                     ev.consume();
 110                 }
 111             }
 112         }
 113 
 114         void altReleased(KeyEvent ev) {
 115             if (menuCanceledOnPress) {
 116                 WindowsLookAndFeel.setMnemonicHidden(true);
 117                 WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 118                 return;
 119             }
 120 
 121             MenuSelectionManager msm =
 122                 MenuSelectionManager.defaultManager();
 123             if (msm.getSelectedPath().length == 0) {
 124                 // if no menu is active, we try activating the menubar
 125 
 126                 JMenuBar mbar = root != null ? root.getJMenuBar() : null;
 127                 if(mbar == null && winAncestor instanceof JFrame) {
 128                     mbar = ((JFrame)winAncestor).getJMenuBar();
 129                 }
 130                 JMenu menu = mbar != null ? mbar.getMenu(0) : null;
 131 
 132                 // It might happen that the altRelease event is processed
 133                 // with a reasonable delay since it has been generated.
 134                 // Here we check the last deactivation time of the containing
 135                 // window. If this time appears to be greater than the altRelease
 136                 // event time the event is skipped to avoid unexpected menu
 137                 // activation. See 7121442.
 138                 // Also we must ensure that original source of key event belongs
 139                 // to the same window object as winAncestor. See 8001633.
 140                 boolean skip = false;
 141                 Toolkit tk = Toolkit.getDefaultToolkit();
 142                 if (tk instanceof SunToolkit) {
 143                     Component originalSource = AWTAccessor.getKeyEventAccessor()
 144                             .getOriginalSource(ev);
 145                     skip = ev.getWhen() <= ((SunToolkit) tk).getWindowDeactivationTime(winAncestor)
 146                             || SunToolkit.getContainingWindow(originalSource) != winAncestor;
 147                 }
 148 
 149                 if (menu != null && !skip) {
 150                     MenuElement[] path = new MenuElement[2];
 151                     path[0] = mbar;
 152                     path[1] = menu;
 153                     msm.setSelectedPath(path);
 154                 } else if(!WindowsLookAndFeel.isMnemonicHidden()) {
 155                     WindowsLookAndFeel.setMnemonicHidden(true);
 156                     WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 157                 }
 158             } else {
 159                 if((msm.getSelectedPath())[0] instanceof ComboPopup) {
 160                     WindowsLookAndFeel.setMnemonicHidden(true);
 161                     WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 162                 }
 163             }
 164 
 165         }
 166 
 167         public boolean postProcessKeyEvent(KeyEvent ev) {
 168             if(ev.isConsumed()) {
 169                 // do not manage consumed event
 170                 return false;
 171             }
 172             if (ev.getKeyCode() == KeyEvent.VK_ALT) {
 173                 root = SwingUtilities.getRootPane(ev.getComponent());
 174                 winAncestor = (root == null ? null :
 175                         SwingUtilities.getWindowAncestor(root));
 176 
 177                 if (ev.getID() == KeyEvent.KEY_PRESSED) {
 178                     if (!altKeyPressed) {
 179                         altPressed(ev);
 180                     }
 181                     altKeyPressed = true;
 182                     return true;
 183                 } else if (ev.getID() == KeyEvent.KEY_RELEASED) {
 184                     if (altKeyPressed) {
 185                         altReleased(ev);
 186                     } else {
 187                         MenuSelectionManager msm =
 188                             MenuSelectionManager.defaultManager();
 189                         MenuElement[] path = msm.getSelectedPath();
 190                         if (path.length <= 0) {
 191                             WindowsLookAndFeel.setMnemonicHidden(true);
 192                             WindowsGraphicsUtils.repaintMnemonicsInWindow(winAncestor);
 193                         }
 194                     }
 195                     altKeyPressed = false;
 196                 }
 197                 root = null;
 198                 winAncestor = null;
 199             } else {
 200                 altKeyPressed = false;
 201             }
 202             return false;
 203         }
 204     }
 205 }