--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/Widget.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,1270 @@
+/*******************************************************************************
+ * 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.Widget;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.DisposeListener;
+import dwt.internal.DWTEventListener;
+import dwt.internal.cocoa.NSEvent;
+import dwt.internal.cocoa.NSRect;
+import dwt.internal.cocoa.OS;
+import dwt.internal.cocoa.objc_super;
+
+
+/**
+ * This class is the abstract superclass of all user interface objects.  
+ * Widgets are created, disposed and issue notification to listeners
+ * when events occur which affect them.
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>Dispose</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is intended to be subclassed <em>only</em>
+ * within the DWT implementation. However, it has not been marked
+ * final to allow those outside of the DWT development team to implement
+ * patched versions of the class in order to get around specific
+ * limitations in advance of when those limitations can be addressed
+ * by the team.  Any class built using subclassing to access the internals
+ * of this class will likely fail to compile or run between releases and
+ * may be strongly platform specific. Subclassing should not be attempted
+ * without an intimate and detailed understanding of the workings of the
+ * hierarchy. No support is provided for user-written classes which are
+ * implemented as subclasses of this class.
+ * </p>
+ *
+ * @see #checkSubclass
+ */
+public abstract class Widget {
+    int style, state;
+    Display display;
+    EventTable eventTable;
+    Object data;
+
+    int jniRef;
+
+    /* Global state flags */
+    static final int DISPOSED         = 1 << 0;
+    static final int CANVAS           = 1 << 1;
+    static final int KEYED_DATA       = 1 << 2;
+    static final int DISABLED         = 1 << 3;
+    static final int HIDDEN           = 1 << 4;
+    static final int GRAB                = 1 << 5;
+    static final int MOVED            = 1 << 6;
+    static final int RESIZED          = 1 << 7;
+    static final int EXPANDING        = 1 << 8;
+    static final int IGNORE_WHEEL     = 1 << 9;
+    static final int PARENT_BACKGROUND = 1 << 10;
+    static final int THEME_BACKGROUND = 1 << 11;
+    
+    /* A layout was requested on this widget */
+    static final int LAYOUT_NEEDED  = 1<<12;
+    
+    /* The preferred size of a child has changed */
+    static final int LAYOUT_CHANGED = 1<<13;
+    
+    /* A layout was requested in this widget hierachy */
+    static final int LAYOUT_CHILD = 1<<14;
+
+    /* More global state flags */
+    static final int RELEASED = 1<<15;
+    static final int DISPOSE_SENT = 1<<16;  
+    static final int FOREIGN_HANDLE = 1<<17;
+    static final int DRAG_DETECT = 1<<18;
+
+    /* Safari fixes */
+    static final int SAFARI_EVENTS_FIX = 1<<19;
+    static final String SAFARI_EVENTS_FIX_KEY = "dwt.internal.safariEventsFix"; //$NON-NLS-1$
+
+    /* Default size for widgets */
+    static final int DEFAULT_WIDTH  = 64;
+    static final int DEFAULT_HEIGHT = 64;
+
+Widget () {
+    /* Do nothing */
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * and a style value describing its behavior and appearance.
+ * <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 widget which will be the parent of the new instance (cannot be null)
+ * @param style the style of widget to construct
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</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
+ * @see #checkSubclass
+ * @see #getStyle
+ */
+public Widget (Widget parent, int style) {
+    checkSubclass ();
+    checkParent (parent);
+    this.style = style;
+    display = parent.display;
+}
+
+void callSuper(int id, int selector, int arg0) {
+    objc_super super_struct = new objc_super();
+    super_struct.receiver = id;
+    super_struct.cls = OS.objc_msgSend(id, OS.sel_superclass);
+    OS.objc_msgSendSuper(super_struct, selector, arg0);
+}
+
+bool acceptsFirstResponder () {
+    return false;
+}
+
+bool becomeFirstResponder () {
+    return true;
+}
+
+bool resignFirstResponder () {
+    return true;
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when an event of the given type occurs. When the
+ * event does occur in the widget, the listener is notified by
+ * sending it the <code>handleEvent()</code> message. The event
+ * type is one of the event constants defined in class <code>DWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should be notified when the event occurs
+ *
+ * @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 Listener
+ * @see DWT
+ * @see #removeListener(int, Listener)
+ * @see #notifyListeners
+ */
+public void addListener (int eventType, Listener listener) {
+    checkWidget();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    _addListener (eventType, listener);
+}
+
+void _addListener (int eventType, Listener listener) {
+    if (eventTable is null) eventTable = new EventTable ();
+    eventTable.hook (eventType, listener);
+}
+
+/**
+ * Adds the listener to the collection of listeners who will
+ * be notified when the widget is disposed. When the widget is
+ * disposed, the listener is notified by sending it the
+ * <code>widgetDisposed()</code> message.
+ *
+ * @param listener the listener which should be notified when the receiver is disposed
+ *
+ * @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 DisposeListener
+ * @see #removeDisposeListener
+ */
+public void addDisposeListener (DisposeListener listener) {
+    checkWidget();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Dispose, typedListener);
+}
+
+static int checkBits (int style, int int0, int int1, int int2, int int3, int int4, int int5) {
+    int mask = int0 | int1 | int2 | int3 | int4 | int5;
+    if ((style & mask) is 0) style |= int0;
+    if ((style & int0) !is 0) style = (style & ~mask) | int0;
+    if ((style & int1) !is 0) style = (style & ~mask) | int1;
+    if ((style & int2) !is 0) style = (style & ~mask) | int2;
+    if ((style & int3) !is 0) style = (style & ~mask) | int3;
+    if ((style & int4) !is 0) style = (style & ~mask) | int4;
+    if ((style & int5) !is 0) style = (style & ~mask) | int5;
+    return style;
+}
+
+void checkOpen () {
+    /* Do nothing */
+}
+
+void checkOrientation (Widget parent) {
+    style &= ~DWT.MIRRORED;
+    if ((style & (DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT)) is 0) {
+        if (parent !is null) {
+            if ((parent.style & DWT.LEFT_TO_RIGHT) !is 0) style |= DWT.LEFT_TO_RIGHT;
+            if ((parent.style & DWT.RIGHT_TO_LEFT) !is 0) style |= DWT.RIGHT_TO_LEFT;
+        }
+    }
+    style = checkBits (style, DWT.LEFT_TO_RIGHT, DWT.RIGHT_TO_LEFT, 0, 0, 0, 0);
+}
+
+void checkParent (Widget parent) {
+    if (parent is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (parent.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
+    parent.checkWidget ();
+    parent.checkOpen ();
+}
+
+/**
+ * Checks that this class can be subclassed.
+ * <p>
+ * The DWT class library is intended to be subclassed 
+ * only at specific, controlled points (most notably, 
+ * <code>Composite</code> and <code>Canvas</code> when
+ * implementing new widgets). This method enforces this
+ * rule unless it is overridden.
+ * </p><p>
+ * <em>IMPORTANT:</em> By providing an implementation of this
+ * method that allows a subclass of a class which does not 
+ * normally allow subclassing to be created, the implementer
+ * agrees to be fully responsible for the fact that any such
+ * subclass will likely fail between DWT releases and will be
+ * strongly platform specific. No support is provided for
+ * user-written classes which are implemented in this fashion.
+ * </p><p>
+ * The ability to subclass outside of the allowed DWT classes
+ * is intended purely to enable those not on the DWT development
+ * team to implement patches in order to get around specific
+ * limitations in advance of when those limitations can be
+ * addressed by the team. Subclassing should not be attempted
+ * without an intimate and detailed understanding of the hierarchy.
+ * </p>
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li>
+ * </ul>
+ */
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+/**
+ * Throws an <code>DWTException</code> if the receiver can not
+ * be accessed by the caller. This may include both checks on
+ * the state of the receiver and more generally on the entire
+ * execution context. This method <em>should</em> be called by
+ * widget implementors to enforce the standard DWT invariants.
+ * <p>
+ * Currently, it is an error to invoke any method (other than
+ * <code>isDisposed()</code>) on a widget that has had its 
+ * <code>dispose()</code> method called. It is also an error
+ * to call widget methods from any thread that is different
+ * from the thread that created the widget.
+ * </p><p>
+ * In future releases of DWT, there may be more or fewer error
+ * checks and exceptions may be thrown for different reasons.
+ * </p>
+ *
+ * @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>
+ */
+protected void checkWidget () {
+    Display display = this.display;
+    if (display is null) error (DWT.ERROR_WIDGET_DISPOSED);
+    if (display.thread !is Thread.currentThread ()) error (DWT.ERROR_THREAD_INVALID_ACCESS);
+    if ((state & DISPOSED) !is 0) error (DWT.ERROR_WIDGET_DISPOSED);
+}
+
+bool clickOnLink(int textView, int link, int charIndex) {
+    return true;
+}
+
+void comboBoxSelectionDidChange(int notification) {
+}
+
+void createHandle () {
+}
+
+void createJNIRef () {
+    jniRef = OS.NewGlobalRef(this);
+    if (jniRef is 0) error (DWT.ERROR_NO_HANDLES);
+}
+
+void createWidget () {
+    createJNIRef ();
+    createHandle ();
+}
+
+void destroyWidget () {
+    releaseHandle ();
+}
+
+/**
+ * Disposes of the operating system resources associated with
+ * the receiver and all its descendants. After this method has
+ * been invoked, the receiver and all descendants will answer
+ * <code>true</code> when sent the message <code>isDisposed()</code>.
+ * Any internal connections between the widgets in the tree will
+ * have been removed to facilitate garbage collection.
+ * <p>
+ * NOTE: This method is not called recursively on the descendants
+ * of the receiver. This means that, widget implementers can not
+ * detect when a widget is being disposed of by re-implementing
+ * this method, but should instead listen for the <code>Dispose</code>
+ * event.
+ * </p>
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
+ * </ul>
+ *
+ * @see #addDisposeListener
+ * @see #removeDisposeListener
+ * @see #checkWidget
+ */
+public void dispose () {
+    /*
+    * Note:  It is valid to attempt to dispose a widget
+    * more than once.  If this happens, fail silently.
+    */
+    if (isDisposed ()) return;
+    if (!isValidThread ()) error (DWT.ERROR_THREAD_INVALID_ACCESS);
+    release (true);
+}
+
+void drawBackground (int control, int context) {
+    /* Do nothing */
+}
+
+void drawRect(int id, NSRect rect) {
+    objc_super super_struct = new objc_super();
+    super_struct.receiver = id;
+    super_struct.cls = OS.objc_msgSend(id, OS.sel_superclass);
+    OS.objc_msgSendSuper(super_struct, OS.sel_drawRect_1, rect);
+}
+
+void drawWidget (int control, int context, int damageRgn, int visibleRgn, int theEvent) {
+}
+
+void error (int code) {
+    DWT.error(code);
+}
+
+bool filters (int eventType) {
+    return display.filters (eventType);
+}
+
+int fixMnemonic (char [] buffer) {
+    int i=0, j=0;
+    while (i < buffer.length) {
+        if ((buffer [j++] = buffer [i++]) is '&') {
+            if (i is buffer.length) {continue;}
+            if (buffer [i] is '&') {i++; continue;}
+            j--;
+        }
+    }
+    return j;
+}
+
+/**
+ * Returns the application defined widget data associated
+ * with the receiver, or null if it has not been set. The
+ * <em>widget data</em> is a single, unnamed field that is
+ * stored with every widget. 
+ * <p>
+ * Applications may put arbitrary objects in this field. If
+ * the object stored in the widget data needs to be notified
+ * when the widget is disposed of, it is the application's
+ * responsibility to hook the Dispose event on the widget and
+ * do so.
+ * </p>
+ *
+ * @return the widget data
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
+ * </ul>
+ *
+ * @see #setData(Object)
+ */
+public Object getData () {
+    checkWidget();
+    return (state & KEYED_DATA) !is 0 ? ((Object []) data) [0] : data;
+}
+
+/**
+ * Returns the application defined property of the receiver
+ * with the specified name, or null if it has not been set.
+ * <p>
+ * Applications may have associated arbitrary objects with the
+ * receiver in this fashion. If the objects stored in the
+ * properties need to be notified when the widget is disposed
+ * of, it is the application's responsibility to hook the
+ * Dispose event on the widget and do so.
+ * </p>
+ *
+ * @param   key the name of the property
+ * @return the value of the property or null if it has not been set
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the key 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 #setData(String, Object)
+ */
+public Object getData (String key) {
+    checkWidget();
+    if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if ((state & KEYED_DATA) !is 0) {
+        Object [] table = (Object []) data;
+        for (int i=1; i<table.length; i+=2) {
+            if (key.equals (table [i])) return table [i+1];
+        }
+    }
+    return null;
+}
+
+/**
+ * Returns the <code>Display</code> that is associated with
+ * the receiver.
+ * <p>
+ * A widget's display is either provided when it is created
+ * (for example, top level <code>Shell</code>s) or is the
+ * same as its parent's display.
+ * </p>
+ *
+ * @return the receiver's display
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
+ * </ul>
+ */
+public Display getDisplay () {
+    Display display = this.display;
+    if (display is null) error (DWT.ERROR_WIDGET_DISPOSED);
+    return display;
+}
+
+/**
+ * Returns an array of listeners who will be notified when an event 
+ * of the given type occurs. The event type is one of the event constants 
+ * defined in class <code>DWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @return an array of listeners that will be notified when the event occurs
+ *
+ * @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 Listener
+ * @see DWT
+ * @see #addListener(int, Listener)
+ * @see #removeListener(int, Listener)
+ * @see #notifyListeners
+ * 
+ * @since 3.4
+ */
+public Listener[] getListeners (int eventType) {
+    checkWidget();
+    if (eventTable is null) return new Listener[0];
+    return eventTable.getListeners(eventType);
+}
+
+String getName () {
+    String string = getClass ().getName ();
+    int index = string.lastIndexOf ('.');
+    if (index is -1) return string;
+    return string.substring (index + 1, string.length ());
+}
+
+String getNameText () {
+    return "";
+}
+
+/**
+ * Returns the receiver's style information.
+ * <p>
+ * Note that the value which is returned by this method <em>may
+ * not match</em> the value which was provided to the constructor
+ * when the receiver was created. This can occur when the underlying
+ * operating system does not support a particular combination of
+ * requested styles. For example, if the platform widget used to
+ * implement a particular DWT widget always has scroll bars, the
+ * result of calling this method would always have the
+ * <code>DWT.H_SCROLL</code> and <code>DWT.V_SCROLL</code> bits set.
+ * </p>
+ *
+ * @return the style bits
+ *
+ * @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 getStyle () {
+    checkWidget();
+    return style;
+}
+
+void helpRequested(int theEvent) {
+}
+
+bool hooks (int eventType) {
+    if (eventTable is null) return false;
+    return eventTable.hooks (eventType);
+}
+
+/**
+ * Returns <code>true</code> if the widget has been disposed,
+ * and <code>false</code> otherwise.
+ * <p>
+ * This method gets the dispose state for the widget.
+ * When a widget has been disposed, it is an error to
+ * invoke any other method using the widget.
+ * </p>
+ *
+ * @return <code>true</code> when the widget is disposed and <code>false</code> otherwise
+ */
+public bool isDisposed () {
+    return (state & DISPOSED) !is 0;
+}
+
+bool isFlipped () {
+    return true;
+}
+
+/**
+ * Returns <code>true</code> if there are any listeners
+ * for the specified event type associated with the receiver,
+ * and <code>false</code> otherwise. The event type is one of
+ * the event constants defined in class <code>DWT</code>.
+ *
+ * @param eventType the type of event
+ * @return true if the event is hooked
+ *
+ * @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 DWT
+ */
+public bool isListening (int eventType) {
+    checkWidget();
+    return hooks (eventType);
+}
+
+bool isTrimHandle (int trimHandle) {
+    return false;
+}
+
+bool isValidSubclass () {
+    return Display.isValidClass (getClass ());
+}
+
+bool isValidThread () {
+    return getDisplay ().isValidThread ();
+}
+
+void flagsChanged(int event) {
+}
+
+void mouseDragged(int event) {
+}
+
+void mouseDown(int event) {
+}
+
+void rightMouseDown(int event) {
+}
+
+void mouseEntered(int event) {
+}
+
+void mouseUp(int event) {
+}
+
+int menuForEvent (int event) {
+    return 0;
+}
+
+void menuNeedsUpdate(int menu) {
+}
+
+void menu_willHighlightItem(int menu, int item) {
+}
+
+void menuWillClose(int menu) {
+}
+
+void menuWillOpen(int menu) {
+}
+
+int numberOfRowsInTableView(int aTableView) {
+    return 0;
+}
+
+int outlineView_child_ofItem(int outlineView, int index, int item) {
+    return 0;
+}
+
+int outlineView_objectValueForTableColumn_byItem(int outlineView, int tableColumn, int item) {
+    return 0;
+}
+
+bool outlineView_isItemExpandable(int outlineView, int item) {
+    return false;
+}
+
+int outlineView_numberOfChildrenOfItem(int outlineView, int item) {
+    return 0;
+}
+
+void outlineView_willDisplayCell_forTableColumn_item(int outlineView, int cell, int tableColumn, int item) {
+}
+
+bool outlineView_shouldCollapseItem(int outlineView, int item) {
+    return false;
+}
+
+bool outlineView_shouldExpandItem(int outlineView, int item) {
+    return false;
+}
+
+void outlineViewSelectionDidChange(int notification) {
+}
+
+void outlineView_setObjectValue_forTableColumn_byItem(int outlineView, int object, int tableColumn, int item) {
+}
+
+/**
+ * Notifies all of the receiver's listeners for events
+ * of the given type that one such event has occurred by
+ * invoking their <code>handleEvent()</code> method.  The
+ * event type is one of the event constants defined in class
+ * <code>DWT</code>.
+ *
+ * @param eventType the type of event which has occurred
+ * @param event the event data
+ *
+ * @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 DWT
+ * @see #addListener
+ * @see #removeListener(int, Listener)
+ */
+public void notifyListeners (int eventType, Event event) {
+    checkWidget();
+    if (event is null) event = new Event ();
+    sendEvent (eventType, event);
+}
+
+void postEvent (int eventType) {
+    sendEvent (eventType, null, false);
+}
+
+void postEvent (int eventType, Event event) {
+    sendEvent (eventType, event, false);
+}
+
+void release (bool destroy) {
+    if ((state & DISPOSE_SENT) is 0) {
+        state |= DISPOSE_SENT;
+        sendEvent (DWT.Dispose);
+    }
+    if ((state & DISPOSED) is 0) {
+        releaseChildren (destroy);
+    }
+    if ((state & RELEASED) is 0) {
+        state |= RELEASED;
+        if (destroy) {
+            releaseParent ();
+            releaseWidget ();
+            destroyWidget ();
+        } else {
+            releaseWidget ();
+            releaseHandle ();
+        }
+    }
+}
+
+void releaseChildren (bool destroy) {
+}
+
+void releaseHandle () {
+    state |= DISPOSED;
+    display = null;
+    if (jniRef !is 0) OS.DeleteGlobalRef(jniRef);
+    jniRef = 0;
+}
+
+void releaseParent () {
+    /* Do nothing */
+}
+
+void releaseWidget () {
+    eventTable = null;
+    data = null;
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when an event of the given type occurs. The event
+ * type is one of the event constants defined in class <code>DWT</code>.
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should no longer be notified when the event occurs
+ *
+ * @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 Listener
+ * @see DWT
+ * @see #addListener
+ * @see #notifyListeners
+ */
+public void removeListener (int eventType, Listener handler) {
+    checkWidget();
+    if (handler is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (eventType, handler);
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when an event of the given type occurs.
+ * <p>
+ * <b>IMPORTANT:</b> This method is <em>not</em> part of the DWT
+ * public API. It is marked public only so that it can be shared
+ * within the packages provided by DWT. It should never be
+ * referenced from application code.
+ * </p>
+ *
+ * @param eventType the type of event to listen for
+ * @param listener the listener which should no longer be notified when the event occurs
+ *
+ * @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 Listener
+ * @see #addListener
+ */
+protected void removeListener (int eventType, DWTEventListener handler) {
+    checkWidget();
+    if (handler is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (eventType, handler);
+}
+
+/**
+ * Removes the listener from the collection of listeners who will
+ * be notified when the widget is disposed.
+ *
+ * @param listener the listener which should no longer be notified when the receiver is disposed
+ *
+ * @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 DisposeListener
+ * @see #addDisposeListener
+ */
+public void removeDisposeListener (DisposeListener listener) {
+    checkWidget();
+    if (listener is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Dispose, listener);
+}
+
+void sendArrowSelection () {
+}
+
+void sendEvent (Event event) {
+    Display display = event.display;
+    if (!display.filterEvent (event)) {
+        if (eventTable !is null) eventTable.sendEvent (event);
+    }
+}
+
+void sendEvent (int eventType) {
+    sendEvent (eventType, null, true);
+}
+
+void sendEvent (int eventType, Event event) {
+    sendEvent (eventType, event, true);
+}
+
+void sendEvent (int eventType, Event event, bool send) {
+    if (eventTable is null && !display.filters (eventType)) {
+        return;
+    }
+    if (event is null) event = new Event ();
+    event.type = eventType;
+    event.display = display;
+    event.widget = this;
+    if (event.time is 0) {
+        event.time = display.getLastEventTime ();
+    }
+    if (send) {
+        sendEvent (event);
+    } else {
+        display.postEvent (event);
+    }
+}
+
+bool sendKeyEvent (int type, int theEvent) {
+//  int [] length = new int [1];
+//  int status = OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 4, length, (char[])null);
+//  if (status is OS.noErr && length [0] > 2) {
+//      int count = 0;
+//      int [] chord = new int [1];
+//      OS.GetEventParameter (theEvent, OS.kEventParamMouseChord, OS.typeUInt32, null, 4, null, chord);
+//      int [] modifiers = new int [1];
+//      OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
+//      char [] chars = new char [length [0] / 2];
+//      OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, chars.length * 2, null, chars);
+//      for (int i=0; i<chars.length; i++) {
+//          Event event = new Event ();
+//          event.character = chars [i];
+//          setInputState (event, type, chord [0], modifiers [0]);
+//          if (sendKeyEvent (type, event)) chars [count++] = chars [i];
+//      }
+//      if (count is 0) return false;
+//      if (count !is chars.length - 1) {
+//          OS.SetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, count * 2, chars);
+//      }
+//      return true;
+//  } else {
+//      Event event = new Event ();
+//      if (!setKeyState (event, type, theEvent)) return true;
+//      return sendKeyEvent (type, event);
+//  }
+    return false;
+}
+
+bool sendKeyEvent (int type, Event event) {
+    sendEvent (type, event);
+    // widget could be disposed at this point
+    
+    /*
+    * It is possible (but unlikely), that application
+    * code could have disposed the widget in the key
+    * events.  If this happens, end the processing of
+    * the key by returning false.
+    */
+    if (isDisposed ()) return false;
+    return event.doit;
+}
+
+void sendDoubleSelection() {
+}
+
+void sendHorizontalSelection () {
+}
+
+void sendSelection () {
+}
+
+void sendVerticalSelection () {
+}
+
+/**
+ * Sets the application defined widget data associated
+ * with the receiver to be the argument. The <em>widget
+ * data</em> is a single, unnamed field that is stored
+ * with every widget. 
+ * <p>
+ * Applications may put arbitrary objects in this field. If
+ * the object stored in the widget data needs to be notified
+ * when the widget is disposed of, it is the application's
+ * responsibility to hook the Dispose event on the widget and
+ * do so.
+ * </p>
+ *
+ * @param data the widget data
+ *
+ * @exception DWTException <ul>
+ *    <li>ERROR_WIDGET_DISPOSED - when the receiver has been disposed</li>
+ *    <li>ERROR_THREAD_INVALID_ACCESS - when called from the wrong thread</li>
+ * </ul>
+ * 
+ * @see #getData()
+ */
+public void setData (Object data) {
+    checkWidget();
+    if (SAFARI_EVENTS_FIX_KEY.equals (data)) {
+        state |= SAFARI_EVENTS_FIX;
+        return;
+    }
+    if ((state & KEYED_DATA) !is 0) {
+        ((Object []) this.data) [0] = data;
+    } else {
+        this.data = data;
+    }
+}
+
+/**
+ * Sets the application defined property of the receiver
+ * with the specified name to the given value.
+ * <p>
+ * Applications may associate arbitrary objects with the
+ * receiver in this fashion. If the objects stored in the
+ * properties need to be notified when the widget is disposed
+ * of, it is the application's responsibility to hook the
+ * Dispose event on the widget and do so.
+ * </p>
+ *
+ * @param key the name of the property
+ * @param value the new value for the property
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the key 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 #getData(String)
+ */
+public void setData (String key, Object value) {
+    checkWidget();
+    if (key is null) error (DWT.ERROR_NULL_ARGUMENT);
+    int index = 1;
+    Object [] table = null;
+    if ((state & KEYED_DATA) !is 0) {
+        table = (Object []) data;
+        while (index < table.length) {
+            if (key.equals (table [index])) break;
+            index += 2;
+        }
+    }
+    if (value !is null) {
+        if ((state & KEYED_DATA) !is 0) {
+            if (index is table.length) {
+                Object [] newTable = new Object [table.length + 2];
+                System.arraycopy (table, 0, newTable, 0, table.length);
+                data = table = newTable;
+            }
+        } else {
+            table = new Object [3];
+            table [0] = data;
+            data = table;
+            state |= KEYED_DATA;
+        }
+        table [index] = key;
+        table [index + 1] = value;
+    } else {
+        if ((state & KEYED_DATA) !is 0) {
+            if (index !is table.length) {
+                int length = table.length - 2;
+                if (length is 1) {
+                    data = table [0];
+                    state &= ~KEYED_DATA;
+                } else {
+                    Object [] newTable = new Object [length];
+                    System.arraycopy (table, 0, newTable, 0, index);
+                    System.arraycopy (table, index + 2, newTable, index, length - index);
+                    data = newTable;
+                }
+            }
+        }
+    }
+}
+
+bool setInputState (Event event, int type, int chord, int modifiers) {
+//  if ((chord & 0x01) !is 0) event.stateMask |= DWT.BUTTON1;
+//  if ((chord & 0x02) !is 0) event.stateMask |= DWT.BUTTON3;
+//  if ((chord & 0x04) !is 0) event.stateMask |= DWT.BUTTON2;
+//  if ((chord & 0x08) !is 0) event.stateMask |= DWT.BUTTON4;
+//  if ((chord & 0x10) !is 0) event.stateMask |= DWT.BUTTON5;
+//  
+//  if ((modifiers & OS.optionKey) !is 0) event.stateMask |= DWT.ALT;
+//  if ((modifiers & OS.shiftKey) !is 0) event.stateMask |= DWT.SHIFT;
+//  if ((modifiers & OS.controlKey) !is 0) event.stateMask |= DWT.CONTROL;
+//  if ((modifiers & OS.cmdKey) !is 0) event.stateMask |= DWT.COMMAND;
+//  switch (type) {
+//      case DWT.MouseDown:
+//      case DWT.MouseDoubleClick:
+//          if (event.button is 1) event.stateMask &= ~DWT.BUTTON1;
+//          if (event.button is 2) event.stateMask &= ~DWT.BUTTON2;
+//          if (event.button is 3)  event.stateMask &= ~DWT.BUTTON3;
+//          if (event.button is 4)  event.stateMask &= ~DWT.BUTTON4;
+//          if (event.button is 5)  event.stateMask &= ~DWT.BUTTON5;
+//          break;
+//      case DWT.MouseUp:
+//          if (event.button is 1) event.stateMask |= DWT.BUTTON1;
+//          if (event.button is 2) event.stateMask |= DWT.BUTTON2;
+//          if (event.button is 3) event.stateMask |= DWT.BUTTON3;
+//          if (event.button is 4) event.stateMask |= DWT.BUTTON4;
+//          if (event.button is 5) event.stateMask |= DWT.BUTTON5;
+//          break;
+//      case DWT.KeyDown:
+//      case DWT.Traverse: {
+//          if (event.keyCode !is 0 || event.character !is 0) return true;
+//          int lastModifiers = display.lastModifiers;
+//          if ((modifiers & OS.alphaLock) !is 0 && (lastModifiers & OS.alphaLock) is 0) {
+//              event.keyCode = DWT.CAPS_LOCK;
+//              return true;
+//          }
+//          if ((modifiers & OS.shiftKey) !is 0 && (lastModifiers & OS.shiftKey) is 0) {
+//              event.stateMask &= ~DWT.SHIFT;
+//              event.keyCode = DWT.SHIFT;
+//              return true;
+//          }
+//          if ((modifiers & OS.controlKey) !is 0 && (lastModifiers & OS.controlKey) is 0) {
+//              event.stateMask &= ~DWT.CONTROL;
+//              event.keyCode = DWT.CONTROL;
+//              return true;
+//          }
+//          if ((modifiers & OS.cmdKey) !is 0 && (lastModifiers & OS.cmdKey) is 0) {
+//              event.stateMask &= ~DWT.COMMAND;
+//              event.keyCode = DWT.COMMAND;
+//              return true;
+//          }   
+//          if ((modifiers & OS.optionKey) !is 0 && (lastModifiers & OS.optionKey) is 0) {
+//              event.stateMask &= ~DWT.ALT;
+//              event.keyCode = DWT.ALT;
+//              return true;
+//          }
+//          break;
+//      }
+//      case DWT.KeyUp: {
+//          if (event.keyCode !is 0 || event.character !is 0) return true;
+//          int lastModifiers = display.lastModifiers;
+//          if ((modifiers & OS.alphaLock) is 0 && (lastModifiers & OS.alphaLock) !is 0) {
+//              event.keyCode = DWT.CAPS_LOCK;
+//              return true;
+//          }
+//          if ((modifiers & OS.shiftKey) is 0 && (lastModifiers & OS.shiftKey) !is 0) {
+//              event.stateMask |= DWT.SHIFT;
+//              event.keyCode = DWT.SHIFT;
+//              return true;
+//          }
+//          if ((modifiers & OS.controlKey) is 0 && (lastModifiers & OS.controlKey) !is 0) {
+//              event.stateMask |= DWT.CONTROL;
+//              event.keyCode = DWT.CONTROL;
+//              return true;
+//          }
+//          if ((modifiers & OS.cmdKey) is 0 && (lastModifiers & OS.cmdKey) !is 0) {
+//              event.stateMask |= DWT.COMMAND;
+//              event.keyCode = DWT.COMMAND;
+//              return true;
+//          }
+//          if ((modifiers & OS.optionKey) is 0 && (lastModifiers & OS.optionKey) !is 0) {
+//              event.stateMask |= DWT.ALT;
+//              event.keyCode = DWT.ALT;
+//              return true;
+//          }
+//          break;
+//      }
+//  }
+    return true; 
+}
+
+bool setKeyState (Event event, int type, NSEvent nsEvent) {
+//  bool isNull = false;
+//  int [] keyCode = new int [1];
+//  OS.GetEventParameter (theEvent, OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode);
+//  event.keyCode = Display.translateKey (keyCode [0]);
+    switch (event.keyCode) {
+//      case DWT.LF: {
+//          /*
+//          * Feature in the Macintosh.  When the numeric key pad
+//          * Enter key is pressed, it generates '\n'.  This is the
+//          * correct platform behavior but is not portable.  The
+//          * fix is to convert the '\n' into '\r'.
+//          */
+//          event.keyCode = DWT.KEYPAD_CR;
+//          event.character = '\r';
+//          break;
+//      }
+        case DWT.BS: event.character = '\b'; break;
+//      case DWT.CR: event.character = '\r'; break;
+        case DWT.DEL: event.character = 0x7F; break;
+//      case DWT.ESC: event.character = 0x1B; break;
+//      case DWT.TAB: event.character = '\t'; break;
+//      default: {
+//          if (event.keyCode is 0 || (DWT.KEYPAD_MULTIPLY <= event.keyCode && event.keyCode <= DWT.KEYPAD_CR)) {
+//              int [] length = new int [1];
+//              int status = OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 4, length, (char[])null);
+//              if (status is OS.noErr && length [0] !is 0) {
+//                  char [] chars = new char [1];
+//                  OS.GetEventParameter (theEvent, OS.kEventParamKeyUnicodes, OS.typeUnicodeText, null, 2, null, chars);
+//                  event.character = chars [0];
+//              }
+//              /*
+//              * Bug in the Mactonish.  For some reason, Ctrl+Shift+'2' and Ctrl+Shift+'6'
+//              * fail to give 0x0 (^@ or ASCII NUL) and 0x1e (^^).  Other control character
+//              * key sequences such as ^A or even Ctrl+Shift+'-' (^_ or 0x1f) are correctly
+//              * translated to control characters.  Since it is not possible to know which
+//              * key combination gives '@' on an international keyboard, there is no way to
+//              * test for either character and convert it to a control character (Shift+'2'
+//              * gives '@' only on an English keyboard) to work around the problem.
+//              *
+//              * There is no fix at this time.
+//              */
+//          }
+//          if (event.keyCode is 0) {
+//              int kchrPtr = OS.GetScriptManagerVariable ((short) OS.smKCHRCache);
+//              if (display.kchrPtr !is kchrPtr) {
+//                  display.kchrPtr = kchrPtr;
+//                  display.kchrState [0] = 0;
+//              }
+//              int result = OS.KeyTranslate (display.kchrPtr, (short)keyCode [0], display.kchrState);
+//              if (result <= 0x7f) {
+//                  event.keyCode = result & 0x7f;
+//              } else {
+//                  int [] encoding = new int [1];
+//                  short keyScript = (short) OS.GetScriptManagerVariable ((short) OS.smKeyScript);
+//                  short regionCode = (short) OS.GetScriptManagerVariable ((short) OS.smRegionCode);
+//                  if (OS.UpgradeScriptInfoToTextEncoding (keyScript, (short) OS.kTextLanguageDontCare, regionCode, null, encoding) is OS.paramErr) {
+//                      if (OS.UpgradeScriptInfoToTextEncoding (keyScript, (short) OS.kTextLanguageDontCare, (short) OS.kTextRegionDontCare, null, encoding) is OS.paramErr) {
+//                          encoding [0] = OS.kTextEncodingMacRoman;
+//                      }
+//                  }
+//                  int [] encodingInfo = new int [1];
+//                  OS.CreateTextToUnicodeInfoByEncoding (encoding [0], encodingInfo);
+//                  if (encodingInfo [0] !is 0) {
+//                      char [] chars = new char [1];
+//                      int [] nchars = new int [1];
+//                      byte [] buffer = new byte [2];
+//                      buffer [0] = 1;
+//                      buffer [1] = (byte) (result & 0xFF);
+//                      OS.ConvertFromPStringToUnicode (encodingInfo [0], buffer, chars.length * 2, nchars, chars);
+//                      OS.DisposeTextToUnicodeInfo (encodingInfo);
+//                      event.keyCode = chars [0];
+//                  }
+//              }
+//          }
+//          break;
+//      }
+    }
+//  if (event.keyCode is 0 && event.character is 0) {
+//      if (!isNull) return false;
+//  }
+//  int [] chord = new int [1];
+//  OS.GetEventParameter (theEvent, OS.kEventParamMouseChord, OS.typeUInt32, null, 4, null, chord);
+//  int [] modifiers = new int [1];
+//  OS.GetEventParameter (theEvent, OS.kEventParamKeyModifiers, OS.typeUInt32, null, 4, null, modifiers);
+//  return setInputState (event, type, chord [0], modifiers [0]);
+    return true;
+}
+
+void tableViewSelectionDidChange (int aNotification) {
+}
+
+int tableView_objectValueForTableColumn_row(int aTableView, int aTableColumn, int rowIndex) {
+    return 0;
+}
+
+void tableView_setObjectValue_forTableColumn_row(int aTableView, int anObject, int aTableColumn, int rowIndex) {    
+}
+
+bool tableView_shouldEditTableColumn_row(int aTableView, int aTableColumn, int rowIndex) {
+    return true;
+}
+
+void tableView_willDisplayCell_forTableColumn_row(int aTableView, int aCell, int aTableColumn, int rowIndex) {
+}
+
+/**
+ * Returns a string containing a concise, human-readable
+ * description of the receiver.
+ *
+ * @return a string representation of the receiver
+ */
+public String toString () {
+    String string = "*Disposed*";
+    if (!isDisposed ()) {
+        string = "*Wrong Thread*";
+        if (isValidThread ()) string = getNameText ();
+    }
+    return getName () + " {" + string + "}";
+}
+
+void willSelectTabViewItem(int tabView, int tabViewItem) {
+}
+
+void windowDidMove(int notification) {
+}
+
+void windowDidResize(int notification) {
+}
+
+void windowDidResignKey(int notification) {
+}
+
+void windowDidBecomeKey(int notification) {
+}
+
+void windowSendEvent(int id, int event) {
+    callSuper(id, OS.sel_sendEvent_1, event);
+}
+
+bool windowShouldClose(int window) {
+    return false;
+}
+
+void windowWillClose(int notification) {
+}
+
+}