--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/MenuItem.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,774 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+module dwt.widgets.MenuItem;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.ArmListener;
+import dwt.events.HelpListener;
+import dwt.events.SelectionEvent;
+import dwt.events.SelectionListener;
+import dwt.graphics.Image;
+import dwt.internal.cocoa.NSMenu;
+import dwt.internal.cocoa.NSMenuItem;
+import dwt.internal.cocoa.NSString;
+import dwt.internal.cocoa.OS;
+import dwt.internal.cocoa.SWTMenu;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * that issues notification when pressed and released. 
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>CHECK, CASCADE, PUSH, RADIO, SEPARATOR</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Arm, Help, Selection</dd>
+ * </dl>
+ * <p>
+ * Note: Only one of the styles CHECK, CASCADE, PUSH, RADIO and SEPARATOR
+ * may be specified.
+ * </p><p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ */
+public class MenuItem extends Item {
+    NSMenuItem nsItem;
+    Menu parent, menu;
+    int accelerator;
+//  int x, y, width, height;
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Menu</code>) and a style value
+ * describing its behavior and appearance. The item is added
+ * to the end of the items maintained by its parent.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together 
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a menu control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see DWT#CHECK
+ * @see DWT#CASCADE
+ * @see DWT#PUSH
+ * @see DWT#RADIO
+ * @see DWT#SEPARATOR
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public MenuItem (Menu parent, int style) {
+    super (parent, checkStyle (style));
+    this.parent = parent;
+    parent.createItem (this, parent.getItemCount ());
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Menu</code>), a style value
+ * describing its behavior and appearance, and the index
+ * at which to place it in the items maintained by its parent.
+ * <p>
+ * The style value is either one of the style constants defined in
+ * class <code>DWT</code> which is applicable to instances of this
+ * class, or must be built by <em>bitwise OR</em>'ing together 
+ * (that is, using the <code>int</code> "|" operator) two or more
+ * of those <code>DWT</code> style constants. The class description
+ * lists the style constants that are applicable to the class.
+ * Style bits are also inherited from superclasses.
+ * </p>
+ *
+ * @param parent a menu control which will be the parent of the new instance (cannot be null)
+ * @param style the style of control to construct
+ * @param index the zero-relative index to store the receiver in its parent
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ *
+ * @see DWT#CHECK
+ * @see DWT#CASCADE
+ * @see DWT#PUSH
+ * @see DWT#RADIO
+ * @see DWT#SEPARATOR
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public MenuItem (Menu parent, int style, int index) {
+    super (parent, checkStyle (style));
+    this.parent = parent;
+    parent.createItem (this, index);
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when the arm events are generated for the control, by sending
+ * it one of the messages defined in the <code>ArmListener</code>
+ * interface.
+ *
+ * @param listener the listener which should be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see ArmListener
+ * @see #removeArmListener
+ */
+public void addArmListener (ArmListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Arm, typedListener);
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when the help events are generated for the control, by sending
+ * it one of the messages defined in the <code>HelpListener</code>
+ * interface.
+ *
+ * @param listener the listener which should be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see HelpListener
+ * @see #removeHelpListener
+ */
+public void addHelpListener (HelpListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Help, typedListener);
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when the menu item is selected by the user, by sending
+ * it one of the messages defined in the <code>SelectionListener</code>
+ * interface.
+ * <p>
+ * When <code>widgetSelected</code> is called, the stateMask field of the event object is valid.
+ * <code>widgetDefaultSelected</code> is not called.
+ * </p>
+ *
+ * @param listener the listener which should be notified when the menu item is selected by the user
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see SelectionListener
+ * @see #removeSelectionListener
+ * @see SelectionEvent
+ */
+public void addSelectionListener (SelectionListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener(listener);
+    addListener (DWT.Selection,typedListener);
+    addListener (DWT.DefaultSelection,typedListener);
+}
+
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+static int checkStyle (int style) {
+    return checkBits (style, DWT.PUSH, DWT.CHECK, DWT.RADIO, DWT.SEPARATOR, DWT.CASCADE, 0);
+}
+
+NSMenu createEmptyMenu () {
+    if ((parent.style & DWT.BAR) !is 0) {
+        return (NSMenu) new SWTMenu ().alloc ().init ();
+    }
+    return null;
+}
+
+void destroyWidget () {
+    parent.destroyItem (this);
+    releaseHandle ();
+}
+
+/**
+ * Returns the widget accelerator.  An accelerator is the bit-wise
+ * OR of zero or more modifier masks and a key. Examples:
+ * <code>DWT.CONTROL | DWT.SHIFT | 'T', DWT.ALT | DWT.F2</code>.
+ * The default value is zero, indicating that the menu item does
+ * not have an accelerator.
+ *
+ * @return the accelerator or 0
+ *
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public int getAccelerator () {
+    checkWidget ();
+    return accelerator;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is enabled, and
+ * <code>false</code> otherwise. A disabled menu item is typically
+ * not selectable from the user interface and draws with an
+ * inactive or "grayed" look.
+ *
+ * @return the receiver's enabled state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @see #isEnabled
+ */
+public bool getEnabled () {
+    checkWidget();
+    return (state & DISABLED) is 0;
+}
+
+/**
+ * Returns the receiver's cascade menu if it has one or null
+ * if it does not. Only <code>CASCADE</code> menu items can have
+ * a pull down menu. The sequence of key strokes, button presses 
+ * and/or button releases that are used to request a pull down
+ * menu is platform specific.
+ *
+ * @return the receiver's menu
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public Menu getMenu () {
+    checkWidget ();
+    return menu;
+}
+
+String getNameText () {
+    if ((style & DWT.SEPARATOR) !is 0) return "|";
+    return super.getNameText ();
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>Menu</code>.
+ *
+ * @return the receiver's parent
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public Menu getParent () {
+    checkWidget ();
+    return parent;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is selected,
+ * and false otherwise.
+ * <p>
+ * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
+ * it is selected when it is checked.
+ *
+ * @return the selection state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public bool getSelection () {
+    checkWidget ();
+    if ((style & (DWT.CHECK | DWT.RADIO)) is 0) return false;
+    return ((NSMenuItem)nsItem).state() is OS.NSOnState;
+}
+
+//int kEventProcessCommand (int nextHandler, int theEvent, int userData) {
+//  //TEMPORARY CODE
+//  if (!isEnabled ()) return OS.noErr;
+//
+//  if ((style & DWT.CHECK) !is 0) {
+//      setSelection (!getSelection ());
+//  } else {
+//      if ((style & DWT.RADIO) !is 0) {
+//          if ((parent.getStyle () & DWT.NO_RADIO_GROUP) !is 0) {
+//              setSelection (!getSelection ());
+//          } else {
+//              selectRadio ();
+//          }
+//      }
+//  }
+//  int [] modifiers = new int [1];
+//  OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
+//  Event event = new Event ();
+//  setInputState (event, (short) 0, OS.GetCurrentEventButtonState (), modifiers [0]);
+//  postEvent (DWT.Selection, event);
+//  return OS.noErr;
+//}
+
+/**
+ * Returns <code>true</code> if the receiver is enabled and all
+ * of the receiver's ancestors are enabled, and <code>false</code>
+ * otherwise. A disabled menu item is typically not selectable from the
+ * user interface and draws with an inactive or "grayed" look.
+ *
+ * @return the receiver's enabled state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @see #getEnabled
+ */
+public bool isEnabled () {
+    return getEnabled () && parent.isEnabled ();
+}
+
+//int keyGlyph (int key) {
+//  switch (key) {
+//      case DWT.BS: return OS.kMenuDeleteLeftGlyph;
+//      case DWT.CR: return OS.kMenuReturnGlyph;
+//      case DWT.DEL: return OS.kMenuDeleteRightGlyph;
+//      case DWT.ESC: return OS.kMenuEscapeGlyph;
+//      case DWT.LF: return OS.kMenuReturnGlyph;
+//      case DWT.TAB: return OS.kMenuTabRightGlyph;
+//      case ' ': return OS.kMenuBlankGlyph;
+////        case ' ': return OS.kMenuSpaceGlyph;
+//      case DWT.ALT: return OS.kMenuOptionGlyph;
+//      case DWT.SHIFT: return OS.kMenuShiftGlyph;
+//      case DWT.CONTROL: return OS.kMenuControlISOGlyph;
+//      case DWT.COMMAND: return OS.kMenuCommandGlyph;
+//      case DWT.ARROW_UP: return OS.kMenuUpArrowGlyph;
+//      case DWT.ARROW_DOWN: return OS.kMenuDownArrowGlyph;
+//      case DWT.ARROW_LEFT: return OS.kMenuLeftArrowGlyph;
+//      case DWT.ARROW_RIGHT: return OS.kMenuRightArrowGlyph;
+//      case DWT.PAGE_UP: return OS.kMenuPageUpGlyph;
+//      case DWT.PAGE_DOWN: return OS.kMenuPageDownGlyph;
+//      case DWT.F1: return OS.kMenuF1Glyph;
+//      case DWT.F2: return OS.kMenuF2Glyph;
+//      case DWT.F3: return OS.kMenuF3Glyph;
+//      case DWT.F4: return OS.kMenuF4Glyph;
+//      case DWT.F5: return OS.kMenuF5Glyph;
+//      case DWT.F6: return OS.kMenuF6Glyph;
+//      case DWT.F7: return OS.kMenuF7Glyph;
+//      case DWT.F8: return OS.kMenuF8Glyph;
+//      case DWT.F9: return OS.kMenuF9Glyph;
+//      case DWT.F10: return OS.kMenuF10Glyph;
+//      case DWT.F11: return OS.kMenuF11Glyph;
+//      case DWT.F12: return OS.kMenuF12Glyph;
+//  }
+//  return OS.kMenuNullGlyph;
+//}
+
+void releaseHandle () {
+    super.releaseHandle ();
+    if (nsItem !is null) nsItem.release();
+    nsItem = null;
+    parent = null;
+}
+
+void releaseChildren (bool destroy) {
+    if (menu !is null) {
+        menu.release (false);
+        menu = null;
+    }
+    super.releaseChildren (destroy);
+}
+
+void releaseWidget () {
+    super.releaseWidget ();
+    accelerator = 0;
+    if (this is parent.defaultItem) parent.defaultItem = null;
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when the arm events are generated for the control.
+ *
+ * @param listener the listener which should no longer be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see ArmListener
+ * @see #addArmListener
+ */
+public void removeArmListener (ArmListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Arm, listener);
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when the help events are generated for the control.
+ *
+ * @param listener the listener which should no longer be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see HelpListener
+ * @see #addHelpListener
+ */
+public void removeHelpListener (HelpListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Help, listener);
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when the control is selected by the user.
+ *
+ * @param listener the listener which should no longer be notified
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see SelectionListener
+ * @see #addSelectionListener
+ */
+public void removeSelectionListener (SelectionListener listener) {
+    checkWidget ();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Selection, listener);
+    eventTable.unhook (DWT.DefaultSelection,listener);  
+}
+
+void selectRadio () {
+    int index = 0;
+    MenuItem [] items = parent.getItems ();
+    while (index < items.length && items [index] !is this) index++;
+    int i = index - 1;
+    while (i >= 0 && items [i].setRadioSelection (false)) --i;
+    int j = index + 1;
+    while (j < items.length && items [j].setRadioSelection (false)) j++;
+    setSelection (true);
+}
+
+void sendSelection () {
+    if ((style & DWT.CHECK) !is 0) {
+        setSelection (!getSelection ());
+    } else {
+        if ((style & DWT.RADIO) !is 0) {
+            if ((parent.getStyle () & DWT.NO_RADIO_GROUP) !is 0) {
+                setSelection (!getSelection ());
+            } else {
+                selectRadio ();
+            }
+        }
+    }
+    Event event = new Event ();
+    //TODO state mask
+//  setInputState (event, (short) 0, OS.GetCurrentEventButtonState (), modifiers [0]);
+    postEvent (DWT.Selection, event);
+}
+
+/**
+ * Sets the widget accelerator.  An accelerator is the bit-wise
+ * OR of zero or more modifier masks and a key. Examples:
+ * <code>DWT.MOD1 | DWT.MOD2 | 'T', DWT.MOD3 | DWT.F2</code>.
+ * <code>DWT.CONTROL | DWT.SHIFT | 'T', DWT.ALT | DWT.F2</code>.
+ * The default value is zero, indicating that the menu item does
+ * not have an accelerator.
+ *
+ * @param accelerator an integer that is the bit-wise OR of masks and a key
+ *
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setAccelerator (int accelerator) {
+    checkWidget ();
+    this.accelerator = accelerator;
+    int key = accelerator & DWT.KEY_MASK;
+    int virtualKey = Display.untranslateKey (key);
+    NSString string =  null;
+    if (virtualKey !is 0) {
+        string = NSString.stringWith ((char)virtualKey + "");
+    } else {
+        string = NSString.stringWith ((char)key + "").lowercaseString();
+    }
+    nsItem.setKeyEquivalent (string);
+    int mask = 0;
+    if ((accelerator & DWT.SHIFT) !is 0) mask |= OS.NSShiftKeyMask;
+    if ((accelerator & DWT.CONTROL) !is 0) mask |= OS.NSControlKeyMask;
+//  if ((accelerator & DWT.COMMAND) !is 0) mask &= ~OS.kMenuNoCommandModifier;
+    if ((accelerator & DWT.COMMAND) !is 0) mask |= OS.NSCommandKeyMask;
+    if ((accelerator & DWT.ALT) !is 0) mask |= OS.NSAlternateKeyMask;
+    nsItem.setKeyEquivalentModifierMask (mask);
+    if ((this.accelerator is 0 && accelerator !is 0) || (this.accelerator !is 0 && accelerator is 0)) {
+        updateText ();
+    }
+}
+
+/**
+ * Enables the receiver if the argument is <code>true</code>,
+ * and disables it otherwise. A disabled menu item is typically
+ * not selectable from the user interface and draws with an
+ * inactive or "grayed" look.
+ *
+ * @param enabled the new enabled state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setEnabled (bool enabled) {
+    checkWidget ();
+    ((NSMenuItem)nsItem).setEnabled(enabled);
+}
+
+/**
+ * Sets the image the receiver will display to the argument.
+ * <p>
+ * Note: This operation is a hint and is not supported on
+ * platforms that do not have this concept (for example, Windows NT).
+ * </p>
+ *
+ * @param image the image to display
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setImage (Image image) {
+    checkWidget ();
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    super.setImage (image);
+    ((NSMenuItem)nsItem).setImage(image !is null? image.handle : null);
+}
+
+/**
+ * Sets the receiver's pull down menu to the argument.
+ * Only <code>CASCADE</code> menu items can have a
+ * pull down menu. The sequence of key strokes, button presses
+ * and/or button releases that are used to request a pull down
+ * menu is platform specific.
+ * <p>
+ * Note: Disposing of a menu item that has a pull down menu
+ * will dispose of the menu.  To avoid this behavior, set the
+ * menu to null before the menu item is disposed.
+ * </p>
+ *
+ * @param menu the new pull down menu
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_MENU_NOT_DROP_DOWN - if the menu is not a drop down menu</li>
+ *    <li>ERROR_MENUITEM_NOT_CASCADE - if the menu item is not a <code>CASCADE</code></li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the menu has been disposed</li>
+ *    <li>ERROR_INVALID_PARENT - if the menu is not in the same widget tree</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setMenu (Menu menu) {
+    checkWidget ();
+
+    /* Check to make sure the new menu is valid */
+    if ((style & DWT.CASCADE) is 0) {
+        error (DWT.ERROR_MENUITEM_NOT_CASCADE);
+    }
+    if (menu !is null) {
+        if (menu.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
+        if ((menu.style & DWT.DROP_DOWN) is 0) {
+            error (DWT.ERROR_MENU_NOT_DROP_DOWN);
+        }
+        if (menu.parent !is parent.parent) {
+            error (DWT.ERROR_INVALID_PARENT);
+        }
+    } 
+    /* Assign the new menu */
+    Menu oldMenu = this.menu;
+    if (oldMenu is menu) return;
+    if (oldMenu !is null) oldMenu.cascade = null;
+    this.menu = menu;
+    
+    /* Update the menu in the OS */
+    NSMenu menuHandle;
+    if (menu is null) {
+        menuHandle = createEmptyMenu ();
+    } else {
+        menu.cascade = this;
+        menuHandle = menu.nsMenu;
+    }
+    nsItem.setSubmenu (menuHandle);
+    
+    /* Update menu title with parent item title */
+    updateText ();
+}
+
+bool setRadioSelection (bool value) {
+    if ((style & DWT.RADIO) is 0) return false;
+    if (getSelection () !is value) {
+        setSelection (value);
+        postEvent (DWT.Selection);
+    }
+    return true;
+}
+
+/**
+ * Sets the selection state of the receiver.
+ * <p>
+ * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>,
+ * it is selected when it is checked.
+ *
+ * @param selected the new selection state
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ */
+public void setSelection (bool selected) {
+    checkWidget ();
+    if ((style & (DWT.CHECK | DWT.RADIO)) is 0) return;
+    ((NSMenuItem)nsItem).setState(selected ? OS.NSOnState : OS.NSOffState);
+}
+
+/**
+ * Sets the receiver's text. The string may include
+ * the mnemonic character and accelerator text.
+ * <p>
+ * Mnemonics are indicated by an '&amp;' that causes the next
+ * character to be the mnemonic.  When the user presses a
+ * key sequence that matches the mnemonic, a selection
+ * event occurs. On most platforms, the mnemonic appears
+ * underlined but may be emphasised in a platform specific
+ * manner.  The mnemonic indicator character '&amp;' can be
+ * escaped by doubling it in the string, causing a single
+ * '&amp;' to be displayed.
+ * </p>
+ * <p>
+ * Accelerator text is indicated by the '\t' character.
+ * On platforms that support accelerator text, the text
+ * that follows the '\t' character is displayed to the user,
+ * typically indicating the key stroke that will cause
+ * the item to become selected.  On most platforms, the
+ * accelerator text appears right aligned in the menu.
+ * Setting the accelerator text does not install the
+ * accelerator key sequence. The accelerator key sequence
+ * is installed using #setAccelerator.
+ * </p>
+ * 
+ * @param string the new text
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the text is null</li>
+ * </ul>
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ * 
+ * @see #setAccelerator
+ */
+public void setText (String string) {
+    checkWidget ();
+    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if ((style & DWT.SEPARATOR) !is 0) return;
+    if (text.equals (string)) return;
+    super.setText (string);
+    updateText ();
+}
+    
+void updateText() {
+    char [] buffer = new char [text.length ()];
+    text.getChars (0, buffer.length, buffer, 0);
+    int i=0, j=0;
+    while (i < buffer.length) {
+        if (buffer [i] is '\t') break;
+        if ((buffer [j++] = buffer [i++]) is '&') {
+            if (i is buffer.length) {continue;}
+            if (buffer [i] is '&') {i++; continue;}
+            j--;
+        }
+    }
+    String text = new String (buffer, 0, j);
+    NSMenu submenu = nsItem.submenu ();
+    NSString label = NSString.stringWith (text);
+    if(submenu !is null && (parent.getStyle () & DWT.BAR) !is 0) {
+        submenu.setTitle (label);
+    } else {
+        nsItem.setTitle (label);
+    }
+}
+
+}
+