1 /*

     2  * Copyright 1995-2003 Sun Microsystems, Inc.  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.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 package sun.awt.motif;

    26 

    27 import java.awt.*;

    28 import java.awt.peer.*;

    29 import java.awt.event.ActionEvent;

    30 import sun.awt.AppContext;

    31 

    32 class MMenuItemPeer implements MenuItemPeer {

    33     long        pData;

    34     long        jniGlobalRef;

    35     boolean     isCheckbox = false;

    36     MenuItem    target;

    37     boolean     nativeCreated = false;

    38 

    39     private boolean disposed = false;

    40 

    41     static {

    42         initIDs();

    43     }

    44 

    45     /**

    46      * Initialize JNI field and method IDs

    47      */

    48     private static native void initIDs();

    49 

    50     native void createMenuItem(MMenuPeer parent);

    51 

    52     void create(MMenuPeer parent) {

    53         if (parent.nativeCreated) {

    54             createMenuItem(parent);

    55             nativeCreated = true;

    56             setEnabled(target.isEnabled());

    57         }

    58     }

    59 

    60     protected MMenuItemPeer() {

    61     }

    62 

    63     MMenuItemPeer(MenuItem target) {

    64         this.target = target;

    65         MMenuPeer parent = (MMenuPeer) MToolkit.targetToPeer(getParent_NoClientCode(target));

    66         create(parent);

    67     }

    68 

    69     static native MenuContainer getParent_NoClientCode(MenuComponent menuComponent);

    70 

    71     protected void finalize() throws Throwable {

    72         dispose();

    73         super.finalize();

    74     }

    75 

    76     public void setEnabled(boolean b) {

    77         if (b) {

    78             enable();

    79         } else {

    80             disable();

    81         }

    82     }

    83 

    84     public void setLabel(String label) {

    85         if (!nativeCreated) {

    86             return;

    87         }

    88         pSetLabel(label);

    89         // Fix for bug 4234266 AWT component : MenuItem  throw NullPointer exception.

    90         MenuShortcut sc = target.getShortcut();

    91         setShortcut(sc != null ? sc.toString() : null );

    92     }

    93 

    94     public void setShortcut(String shortCut) {

    95         if (!nativeCreated) {

    96             return;

    97         }

    98         pSetShortcut(shortCut);

    99     }

   100 

   101     native void pSetLabel(String label);

   102     native void pSetShortcut(String shortCut);

   103 

   104     /**

   105      * DEPRECATED but, for now, called by setEnabled(boolean).

   106      */

   107     public void enable() {

   108         if (!nativeCreated) {

   109             return;

   110         }

   111         pEnable();

   112     }

   113     native void pEnable();

   114 

   115     /**

   116      * DEPRECATED but, for now, called by setEnabled(boolean).

   117      */

   118     public void disable() {

   119         if (!nativeCreated) {

   120             return;

   121         }

   122         pDisable();

   123     }

   124     native void pDisable();

   125 

   126     private void destroyNativeWidgetImpl() {

   127         if (nativeCreated) {

   128             pDispose();

   129             nativeCreated = false;

   130         }

   131     }

   132 

   133     void destroyNativeWidget() {

   134         // We do not need to synchronize this method because the caller

   135         // always holds the tree lock

   136 

   137         destroyNativeWidgetImpl();

   138     }

   139 

   140     /*

   141      * Subclasses should override disposeImpl() instead of dispose(). Client

   142      * code should always invoke dispose(), never disposeImpl().

   143      */

   144     protected void disposeImpl() {

   145         // Don't call destroyNativeWidget() because on a Menu, this will

   146         // cause a traversal of all the menu's MenuItems. This traversal was

   147         // already done once by java.awt.Menu.removeNotify().

   148 

   149         destroyNativeWidgetImpl();

   150         MToolkit.targetDisposedPeer(target, this);

   151     }

   152     public final void dispose() {

   153         boolean call_disposeImpl = false;

   154 

   155         if (!disposed) {

   156             synchronized (this) {

   157                 if (!disposed) {

   158                     disposed = call_disposeImpl = true;

   159                 }

   160             }

   161         }

   162 

   163         if (call_disposeImpl) {

   164             disposeImpl();

   165         }

   166     }

   167 

   168     native void pDispose();

   169 

   170     void postEvent(AWTEvent event) {

   171         MToolkit.postEvent(MToolkit.targetToAppContext(target), event);

   172     }

   173 

   174     // NOTE: This method may be called by privileged threads.

   175     //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!

   176     public void action(final long when, final int modifiers) {

   177 

   178         MToolkit.executeOnEventHandlerThread(target, new Runnable() {

   179             public void run() {

   180                 postEvent(new ActionEvent(target, ActionEvent.ACTION_PERFORMED,

   181                                           target.getActionCommand(), when,

   182                                           modifiers));

   183             }

   184         });

   185     }

   186 

   187     // Needed for MenuComponentPeer.

   188     public void setFont(Font f) {

   189     }

   190 }