--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/TreeItem.d	Sat Aug 09 17:00:02 2008 +0200
@@ -0,0 +1,1369 @@
+/*******************************************************************************
+ * 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.TreeItem;
+
+import dwt.dwthelper.utils;
+
+
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.graphics.Color;
+import dwt.graphics.Font;
+import dwt.graphics.GC;
+import dwt.graphics.Image;
+import dwt.graphics.Rectangle;
+import dwt.internal.cocoa.NSAttributedString;
+import dwt.internal.cocoa.NSColor;
+import dwt.internal.cocoa.NSMutableDictionary;
+import dwt.internal.cocoa.NSOutlineView;
+import dwt.internal.cocoa.NSRect;
+import dwt.internal.cocoa.NSString;
+import dwt.internal.cocoa.OS;
+import dwt.internal.cocoa.SWTTreeItem;
+
+/**
+ * Instances of this class represent a selectable user interface object
+ * that represents a hierarchy of tree items in a tree widget.
+ * 
+ * <dl>
+ * <dt><b>Styles:</b></dt>
+ * <dd>(none)</dd>
+ * <dt><b>Events:</b></dt>
+ * <dd>(none)</dd>
+ * </dl>
+ * <p>
+ * IMPORTANT: This class is <em>not</em> intended to be subclassed.
+ * </p>
+ */
+public class TreeItem extends Item {
+    Tree parent;
+    TreeItem parentItem;
+    TreeItem[] items;
+    int itemCount;
+    String [] strings;
+    Image [] images;
+    bool checked, grayed, cached, expanded;
+    Color foreground, background;
+    Color[] cellForeground, cellBackground;
+    Font font;
+    Font[] cellFont;
+    int width = -1;
+    //
+    SWTTreeItem handle;
+    
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Tree</code> or a <code>TreeItem</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 tree 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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TreeItem (Tree parent, int style) {
+    this (checkNull (parent), null, style, -1, true);
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Tree</code> or a <code>TreeItem</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 tree 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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TreeItem (Tree parent, int style, int index) {
+    this (checkNull (parent), null, style, checkIndex (index), true);
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Tree</code> or a <code>TreeItem</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 parentItem a tree 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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TreeItem (TreeItem parentItem, int style) {
+    this (checkNull (parentItem).parent, parentItem, style, -1, true);
+}
+
+/**
+ * Constructs a new instance of this class given its parent
+ * (which must be a <code>Tree</code> or a <code>TreeItem</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 parentItem a tree 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
+ * @see Widget#checkSubclass
+ * @see Widget#getStyle
+ */
+public TreeItem (TreeItem parentItem, int style, int index) {
+    this (checkNull (parentItem).parent, parentItem, style, checkIndex (index), true);
+}
+
+TreeItem (Tree parent, TreeItem parentItem, int style, int index, bool create) {
+    super (parent, style);
+    this.parent = parent;
+    this.parentItem = parentItem;
+    if (create) parent.createItem (this, parentItem, index);
+}
+
+static TreeItem checkNull (TreeItem item) {
+    if (item is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
+    return item;
+}
+
+static Tree checkNull (Tree parent) {
+    if (parent is null) DWT.error (DWT.ERROR_NULL_ARGUMENT);
+    return parent;
+}
+
+static int checkIndex (int index) {
+    if (index < 0) DWT.error (DWT.ERROR_INVALID_RANGE);
+    return index;
+}
+
+int calculateWidth (int index, GC gc) {
+    if (index is 0 && width !is -1) return width;
+    int width = 0;
+    Image image = getImage (index);
+    String text = getText (index);
+    gc.setFont (getFont (index));
+//  if (image !is null) width += image.getBounds ().width + parent.getGap ();
+    if (text !is null && text.length () > 0) width += gc.stringExtent (text).x;
+//  if (parent.hooks (DWT.MeasureItem)) {
+//      Event event = new Event ();
+//      event.item = this;
+//      event.index = index;
+//      event.gc = gc;
+//      short [] height = new short [1];
+//      OS.GetDataBrowserTableViewRowHeight (parent.handle, height);
+//      event.width = width;
+//      event.height = height [0];
+//      parent.sendEvent (DWT.MeasureItem, event);
+//      if (parent.itemHeight < event.height) {
+//          parent.itemHeight = event.height;
+//          OS.SetDataBrowserTableViewRowHeight (parent.handle, (short) event.height);
+//      }
+//      width = event.width;
+//  }
+    if (index is 0) this.width = width;
+    return width;
+}
+
+protected void checkSubclass () {
+    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
+}
+
+void clear () {
+    cached = false;
+    text = "";
+    image = null;
+    strings = null;
+    images = null;
+    checked = grayed = false;
+    foreground = background = null;
+    cellForeground = cellBackground = null;
+    font = null;
+    cellFont = null;
+}
+
+/**
+ * Clears the item at the given zero-relative index in the receiver.
+ * The text, icon and other attributes of the item are set to the default
+ * value.  If the tree was created with the <code>DWT.VIRTUAL</code> style,
+ * these attributes are requested again as needed.
+ *
+ * @param index the index of the item to clear
+ * @param all <code>true</code> if all child items of the indexed item should be
+ * cleared recursively, and <code>false</code> otherwise
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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 DWT#VIRTUAL
+ * @see DWT#SetData
+ * 
+ * @since 3.2
+ */
+public void clear (int index, bool all) {
+    checkWidget ();
+    int count = getItemCount ();
+    if (index < 0 || index >= count) DWT.error (DWT.ERROR_INVALID_RANGE);
+    parent.clear (this, index, all);
+}
+
+
+/**
+ * Clears all the items in the receiver. The text, icon and other
+ * attributes of the items are set to their default values. If the
+ * tree was created with the <code>DWT.VIRTUAL</code> style, these
+ * attributes are requested again as needed.
+ * 
+ * @param all <code>true</code> if all child items should be cleared
+ * recursively, and <code>false</code> otherwise
+ *
+ * @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#VIRTUAL
+ * @see DWT#SetData
+ * 
+ * @since 3.2
+ */
+public void clearAll (bool all) {
+    checkWidget ();
+    parent.clearAll (this, all);
+}
+
+NSAttributedString createString(int index) {
+    NSMutableDictionary dict = NSMutableDictionary.dictionaryWithCapacity(4);
+    Color foreground = cellForeground !is null ? cellForeground [index] : null;
+    if (foreground is null) foreground = this.foreground;
+    if (foreground is null) foreground = parent.foreground;
+    if (foreground !is null) {
+        NSColor color = NSColor.colorWithDeviceRed(foreground.handle[0], foreground.handle[1], foreground.handle[2], 1);
+        dict.setObject(color, OS.NSForegroundColorAttributeName());
+    }
+    Font font = cellFont !is null ? cellFont [index] : null;
+    if (font is null) font = this.font;
+//  if (font is null) font = parent.font;
+    if (font !is null) {
+        dict.setObject(font.handle, OS.NSFontAttributeName());
+    }
+    Color background = cellBackground !is null ? cellBackground [index] : null;
+    if (background is null) background = this.background;
+    if (background !is null) {
+        NSColor color = NSColor.colorWithDeviceRed(background.handle[0], background.handle[1], background.handle[2], 1);
+        dict.setObject(color, OS.NSBackgroundColorAttributeName());
+    }
+    String text = getText (index);
+    int length = text.length();
+    char[] chars = new char[length];
+    text.getChars(0, length, chars, 0);
+    NSString str = NSString.stringWithCharacters(chars, length);
+    NSAttributedString attribStr = ((NSAttributedString)new NSAttributedString().alloc()).initWithString_attributes_(str, dict);
+    attribStr.autorelease();
+    return attribStr;
+}
+
+void destroyWidget () {
+    parent.destroyItem (this);
+    releaseHandle ();
+}
+
+/**
+ * Returns the receiver's background color.
+ *
+ * @return the background color
+ * 
+ * @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>
+ * 
+ * @since 2.0
+ * 
+ */
+public Color getBackground () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return background !is null ? background : parent.getBackground ();
+}
+
+/**
+ * Returns the background color at the given column index in the receiver.
+ *
+ * @param index the column index
+ * @return the background color
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public Color getBackground (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count -1) return getBackground ();
+    if (cellBackground is null || cellBackground [index] is null) return getBackground ();
+    return cellBackground [index];
+}
+
+/**
+ * Returns a rectangle describing the receiver's size and location
+ * relative to its parent.
+ *
+ * @return the receiver's bounding rectangle
+ *
+ * @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 Rectangle getBounds () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    NSOutlineView outlineView = (NSOutlineView) parent.view;
+    int row = outlineView.rowForItem(handle);
+    NSRect rect = outlineView.rectOfRow (row);
+    rect = outlineView.convertRect_toView_ (rect, parent.scrollView);
+    Rectangle result = new Rectangle((int) rect.x, (int) rect.y, (int) rect.width, (int) rect.height);
+    return result;
+}
+
+/**
+ * Returns a rectangle describing the receiver's size and location
+ * relative to its parent at a column in the tree.
+ *
+ * @param index the index that specifies the column
+ * @return the receiver's bounding column rectangle
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public Rectangle getBounds (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if (index !is 0 && !(0 <= index && index < parent.columnCount)) return new Rectangle (0, 0, 0, 0);
+    NSOutlineView outlineView = (NSOutlineView) parent.view;
+    int row = outlineView.rowForItem(handle);
+    if ((parent.style & DWT.CHECK) !is 0) index ++;
+    NSRect rect = outlineView.frameOfCellAtColumn(index, row);
+    rect = outlineView.convertRect_toView_ (rect, parent.scrollView);
+    return new Rectangle((int)rect.x, (int)rect.y, (int)rect.width, (int)rect.height);
+}
+
+/**
+ * Returns <code>true</code> if the receiver is checked,
+ * and false otherwise.  When the parent does not have
+ * the <code>CHECK style, return false.
+ * <p>
+ *
+ * @return the checked 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 getChecked () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if ((parent.style & DWT.CHECK) is 0) return false;
+    return checked;
+}
+
+/**
+ * Returns <code>true</code> if the receiver is expanded,
+ * and false otherwise.
+ * <p>
+ *
+ * @return the expanded 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 getExpanded () {
+    checkWidget ();
+    return expanded;
+}
+
+/**
+ * Returns the font that the receiver will use to paint textual information for this item.
+ *
+ * @return the receiver's font
+ *
+ * @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>
+ *
+ * @since 3.0
+ */
+public Font getFont () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return font !is null ? font : parent.getFont ();
+}
+
+/**
+ * Returns the font that the receiver will use to paint textual information
+ * for the specified cell in this item.
+ *
+ * @param index the column index
+ * @return the receiver's font
+ *
+ * @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>
+ *
+ * @since 3.1
+ */
+public Font getFont (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count -1) return getFont ();
+    if (cellFont is null || cellFont [index] is null) return getFont ();
+    return cellFont [index];
+}
+
+/**
+ * Returns the foreground color that the receiver will use to draw.
+ *
+ * @return the receiver's foreground color
+ *
+ * @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>
+ * 
+ * @since 2.0
+ * 
+ */
+public Color getForeground () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return foreground !is null ? foreground : parent.getForeground ();
+}
+
+/**
+ * 
+ * Returns the foreground color at the given column index in the receiver.
+ *
+ * @param index the column index
+ * @return the foreground color
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public Color getForeground (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count -1) return getForeground ();
+    if (cellForeground is null || cellForeground [index] is null) return getForeground ();
+    return cellForeground [index];
+}
+
+/**
+ * Returns <code>true</code> if the receiver is grayed,
+ * and false otherwise. When the parent does not have
+ * the <code>CHECK style, return false.
+ * <p>
+ *
+ * @return the grayed state of the checkbox
+ *
+ * @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 getGrayed () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if ((parent.style & DWT.CHECK) is 0) return false;
+    return grayed;
+}
+
+public Image getImage () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return super.getImage ();
+}
+
+/**
+ * Returns the image stored at the given column index in the receiver,
+ * or null if the image has not been set or if the column does not exist.
+ *
+ * @param index the column index
+ * @return the image stored at the given column index in the receiver
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public Image getImage (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if (index is 0) return getImage ();
+    if (images !is null) {
+        if (0 <= index && index < images.length) return images [index];
+    }
+    return null;
+}
+
+/**
+ * Returns a rectangle describing the size and location
+ * relative to its parent of an image at a column in the
+ * tree.
+ *
+ * @param index the index that specifies the column
+ * @return the receiver's bounding image rectangle
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public Rectangle getImageBounds (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+//  if (index !is 0 && !(0 <= index && index < parent.columnCount)) return new Rectangle (0, 0, 0, 0);
+//  Rect rect = new Rect();
+//  int columnId = parent.columnCount is 0 ? parent.column_id : parent.columns [index].id;
+//  if (OS.GetDataBrowserItemPartBounds (parent.handle, id, columnId, OS.kDataBrowserPropertyContentPart, rect) !is OS.noErr) {
+//      return new Rectangle (0, 0, 0, 0);
+//  }
+//  int x = rect.left, y = rect.top;
+//  int width = 0;
+//  if (index is 0 && image !is null) {
+//      Rectangle bounds = image.getBounds ();
+//      width += bounds.width;
+//  }
+//  if (index !is 0 && images !is null && images[index] !is null) {
+//      Rectangle bounds = images [index].getBounds ();
+//      width += bounds.width;
+//  }
+//  int height = rect.bottom - rect.top + 1;
+//  return new Rectangle (x, y, width, height);
+    return null;
+}
+
+/**
+ * Returns the item at the given, zero-relative index in the
+ * receiver. Throws an exception if the index is out of range.
+ *
+ * @param index the index of the item to return
+ * @return the item at the given index
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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>
+ * 
+ * @since 3.1
+ */
+public TreeItem getItem (int index) {
+    checkWidget ();
+    if (index < 0) error (DWT.ERROR_INVALID_RANGE);
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if (index >= itemCount) error (DWT.ERROR_INVALID_RANGE);
+    return parent._getItem (this, index);
+}
+
+/**
+ * Returns the number of items contained in the receiver
+ * that are direct item children of the receiver.
+ *
+ * @return the number of items
+ *
+ * @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 getItemCount () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return itemCount;
+}
+
+/**
+ * Returns a (possibly empty) array of <code>TreeItem</code>s which
+ * are the direct item children of the receiver.
+ * <p>
+ * Note: This is not the actual structure used by the receiver
+ * to maintain its list of items, so modifying the array will
+ * not affect the receiver. 
+ * </p>
+ *
+ * @return the receiver's items
+ *
+ * @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 TreeItem [] getItems () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    TreeItem [] result = new TreeItem [itemCount];
+    for (int i=0; i<itemCount; i++) {
+        result [i] = parent._getItem (this, i);
+    }
+    return result;
+}
+
+String getNameText () {
+    if ((parent.style & DWT.VIRTUAL) !is 0) {
+        if (!cached) return "*virtual*"; //$NON-NLS-1$
+    }
+    return super.getNameText ();
+}
+
+/**
+ * Returns the receiver's parent, which must be a <code>Tree</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 Tree getParent () {
+    checkWidget ();
+    return parent;
+}
+
+/**
+ * Returns the receiver's parent item, which must be a
+ * <code>TreeItem</code> or null when the receiver is a
+ * root.
+ *
+ * @return the receiver's parent item
+ *
+ * @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 TreeItem getParentItem () {
+    checkWidget ();
+    return parentItem;
+}
+
+public String getText () {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    return super.getText ();
+}
+
+/**
+ * Returns the text stored at the given column index in the receiver,
+ * or empty string if the text has not been set.
+ *
+ * @param index the column index
+ * @return the text stored at the given column index in the receiver
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public String getText (int index) {
+    checkWidget ();
+    if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+    if (index is 0) return getText ();
+    if (strings !is null) {
+        if (0 <= index && index < strings.length) {
+            String string = strings [index];
+            return string !is null ? string : "";
+        }
+    }
+    return "";
+}
+
+/**
+ * Returns a rectangle describing the size and location
+ * relative to its parent of the text at a column in the
+ * tree.
+ *
+ * @param index the index that specifies the column
+ * @return the receiver's bounding text rectangle
+ *
+ * @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>
+ * 
+ * @since 3.3
+ */
+public Rectangle getTextBounds (int index) {
+    checkWidget ();
+//  if (!parent.checkData (this, true)) error (DWT.ERROR_WIDGET_DISPOSED);
+//  if (index !is 0 && !(0 <= index && index < parent.columnCount)) return new Rectangle (0, 0, 0, 0);
+//  Rect rect = new Rect();
+//  int columnId = parent.columnCount is 0 ? parent.column_id : parent.columns [index].id;
+//  if (OS.GetDataBrowserItemPartBounds (parent.handle, id, columnId, OS.kDataBrowserPropertyEnclosingPart, rect) !is OS.noErr) {
+//      return new Rectangle (0, 0, 0, 0);
+//  }
+//  int[] disclosure = new int [1];
+//  OS.GetDataBrowserListViewDisclosureColumn (parent.handle, disclosure, new bool [1]);
+//  int imageWidth = 0;
+//  int margin = index is 0 ? 0 : parent.getInsetWidth (columnId, false) / 2;
+//  Image image = getImage (index);
+//  if (image !is null) {
+//      Rectangle bounds = image.getBounds ();
+//      imageWidth = bounds.width + parent.getGap ();
+//  }
+//  int x, y, width, height;
+//  if (OS.VERSION >= 0x1040 && disclosure [0] !is columnId) {
+//      if (parent.getLinesVisible ()) {
+//          rect.left += Tree.GRID_WIDTH;
+//          rect.top += Tree.GRID_WIDTH;
+//      }
+//      x = rect.left + imageWidth + margin;
+//      y = rect.top;
+//      width = Math.max (0, rect.right - rect.left - imageWidth - margin * 2);;
+//      height = rect.bottom - rect.top;
+//  } else {
+//      Rect rect2 = new Rect();
+//      if (OS.GetDataBrowserItemPartBounds (parent.handle, id, columnId, OS.kDataBrowserPropertyContentPart, rect2) !is OS.noErr) {
+//          return new Rectangle (0, 0, 0, 0);
+//      }
+//      x = rect2.left + imageWidth + margin;
+//      y = rect2.top;
+//      width = Math.max (0, rect.right - rect2.left + 1 - imageWidth - margin * 2);
+//      height = rect2.bottom - rect2.top + 1;
+//  }
+//  return new Rectangle (x, y, width, height);
+    return null;
+}
+
+/**
+ * Searches the receiver's list starting at the first item
+ * (index 0) until an item is found that is equal to the 
+ * argument, and returns the index of that item. If no item
+ * is found, returns -1.
+ *
+ * @param item the search item
+ * @return the index of the item
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the item is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</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>
+ * 
+ * @since 3.1
+ */
+public int indexOf (TreeItem item) {
+    checkWidget ();
+    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (item.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
+    if (item.parentItem !is this) return -1;
+    for (int i = 0; i < itemCount; i++) {
+        if (item is items[i]) return i;
+    }
+    return -1;
+}
+
+void releaseChildren (bool destroy) {
+    for (int i=0; i<items.length; i++) {
+        TreeItem item = items [i];
+        if (item !is null && !item.isDisposed ()) {
+            item.release (false);
+        }
+    }
+    items = null;
+    itemCount = 0;
+    super.releaseChildren (destroy);
+}
+
+void releaseHandle () {
+    super.releaseHandle ();
+    if (handle !is null) handle.release();
+    handle = null;
+    parentItem = null;
+    parent = null;
+}
+
+void releaseWidget () {
+    super.releaseWidget ();
+    strings = null;
+    images = null;
+    background = foreground = null;
+    font = null;
+    cellBackground = cellForeground = null;
+    cellFont = null;
+}
+
+/**
+ * Removes all of the items from the receiver.
+ * <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>
+ *
+ * @since 3.1
+ */
+public void removeAll () {
+    checkWidget ();
+//  for (int i=itemCount - 1; i >= 0; i--) {
+//      TreeItem item = parent._getItem (childIds [i], false);
+//      if (item !is null && !item.isDisposed ()) {
+//          item.dispose ();
+//      }
+//  }
+}
+
+/**
+ * Sets the receiver's background color to the color specified
+ * by the argument, or to the default system color for the item
+ * if the argument is null.
+ *
+ * @param color the new color (or null)
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 2.0
+ * 
+ */
+public void setBackground (Color color) {
+    checkWidget ();
+    if (color !is null && color.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    Color oldColor = background;
+    if (oldColor is color) return;
+    background = color;
+    if (oldColor !is null && oldColor.equals (color)) return;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the background color at the given column index in the receiver 
+ * to the color specified by the argument, or to the default system color for the item
+ * if the argument is null.
+ *
+ * @param index the column index
+ * @param color the new color (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 3.1
+ * 
+ */
+public void setBackground (int index, Color color) {
+    checkWidget ();
+    if (color !is null && color.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count - 1) return;
+    if (cellBackground is null) {
+        if (color is null) return;
+        cellBackground = new Color [count];
+    }
+    Color oldColor = cellBackground [index];
+    if (oldColor is color) return;
+    cellBackground [index] = color;
+    if (oldColor !is null && oldColor.equals (color)) return;
+    cached = true; 
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the checked state of the receiver.
+ * <p>
+ *
+ * @param checked the new checked 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 setChecked (bool checked) {
+    checkWidget ();
+    if ((parent.style & DWT.CHECK) is 0) return;
+    if (this.checked is checked) return;
+    this.checked = checked;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the expanded state of the receiver.
+ * <p>
+ *
+ * @param expanded the new expanded 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 setExpanded (bool expanded) {
+    checkWidget ();
+    if (expanded is getExpanded ()) return;
+    parent.ignoreExpand = true;
+    if (expanded) {
+        ((NSOutlineView)parent.view).expandItem_(handle);
+    } else {
+        ((NSOutlineView)parent.view).collapseItem_(handle);
+    }
+    parent.ignoreExpand = false;
+    cached = true;
+//  if (expanded) {
+//      parent.setScrollWidth (false, childIds, false);
+//  } else {
+//      parent.setScrollWidth (true);
+//      parent.fixScrollBar ();
+//  }
+}
+
+/**
+ * Sets the font that the receiver will use to paint textual information
+ * for this item to the font specified by the argument, or to the default font
+ * for that kind of control if the argument is null.
+ *
+ * @param font the new font (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 3.0
+ */
+public void setFont (Font font) {
+    checkWidget ();
+    if (font !is null && font.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    Font oldFont = this.font;
+    if (oldFont is font) return;
+    this.font = font;
+    if (oldFont !is null && oldFont.equals (font)) return;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the font that the receiver will use to paint textual information
+ * for the specified cell in this item to the font specified by the 
+ * argument, or to the default font for that kind of control if the 
+ * argument is null.
+ *
+ * @param index the column index
+ * @param font the new font (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 3.1
+ */
+public void setFont (int index, Font font) {
+    checkWidget ();
+    if (font !is null && font.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count - 1) return;
+    if (cellFont is null) {
+        if (font is null) return;
+        cellFont = new Font [count];
+    }
+    Font oldFont = this.font;
+    if (oldFont is font) return;
+    cellFont [index] = font;
+    if (oldFont !is null && oldFont.equals (font)) return;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the receiver's foreground color to the color specified
+ * by the argument, or to the default system color for the item
+ * if the argument is null.
+ *
+ * @param color the new color (or null)
+ *
+ * @since 2.0
+ * 
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 2.0
+ * 
+ */
+public void setForeground (Color color) {
+    checkWidget ();
+    if (color !is null && color.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    Color oldColor = foreground;
+    if (oldColor is color) return;
+    foreground = color;
+    if (oldColor !is null && oldColor.equals (color)) return;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the foreground color at the given column index in the receiver 
+ * to the color specified by the argument, or to the default system color for the item
+ * if the argument is null.
+ *
+ * @param index the column index
+ * @param color the new color (or null)
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
+ * 
+ * @since 3.1
+ * 
+ */
+public void setForeground (int index, Color color){
+    checkWidget ();
+    if (color !is null && color.isDisposed ()) {
+        DWT.error (DWT.ERROR_INVALID_ARGUMENT);
+    }
+    int count = Math.max (1, parent.columnCount);
+    if (0 > index || index > count - 1) return;
+    if (cellForeground is null) {
+        if (color is null) return;
+        cellForeground = new Color [count];
+    }
+    Color oldColor = cellForeground [index];
+    if (oldColor is color) return;
+    cellForeground [index] = color;
+    if (oldColor !is null && oldColor.equals (color)) return;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the grayed state of the checkbox for this item.  This state change 
+ * only applies if the Tree was created with the DWT.CHECK style.
+ *
+ * @param grayed the new grayed state of the checkbox
+ *
+ * @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 setGrayed (bool grayed) {
+    checkWidget ();
+    if ((parent.style & DWT.CHECK) is 0) return;
+    if (this.grayed is grayed) return;
+    this.grayed = grayed;
+    cached = true;
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+/**
+ * Sets the image for multiple columns in the tree. 
+ * 
+ * @param images the array of new images
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_NULL_ARGUMENT - if the array of images is null</li>
+ *    <li>ERROR_INVALID_ARGUMENT - if one of the images has been disposed</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>
+ * 
+ * @since 3.1
+ */
+public void setImage (Image [] images) {
+    checkWidget ();
+    if (images is null) error (DWT.ERROR_NULL_ARGUMENT);
+    for (int i=0; i<images.length; i++) {
+        setImage (i, images [i]);
+    }
+}
+
+/**
+ * Sets the receiver's image at a column.
+ *
+ * @param index the column index
+ * @param image the new image
+ *
+ * @exception IllegalArgumentException <ul>
+ *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</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>
+ * 
+ * @since 3.1
+ */
+public void setImage (int index, Image image) {
+    checkWidget ();
+    if (image !is null && image.isDisposed ()) {
+        error(DWT.ERROR_INVALID_ARGUMENT);
+    }
+//  if (parent.imageBounds is null && image !is null) {
+//      parent.setItemHeight (image);
+//  }
+    if (index is 0)  {
+        if (image !is null && image.type is DWT.ICON) {
+            if (image.equals (this.image)) return;
+        }
+        width = -1;
+        super.setImage (image);
+    }
+    int count = Math.max (1, parent.columnCount);
+    if (0 <= index && index < count) {
+        if (images is null) images = new Image [count];
+        if (image !is null && image.type is DWT.ICON) {
+            if (image.equals (images [index])) return;
+        }
+        images [index] = image; 
+    }
+//  cached = true;
+//  if (index is 0) parent.setScrollWidth (this);
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+public void setImage (Image image) {
+    checkWidget ();
+    setImage (0, image);
+}
+
+/**
+ * Sets the number of child items contained in the receiver.
+ *
+ * @param count the number of items
+ *
+ * @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>
+ *
+ * @since 3.2
+ */
+public void setItemCount (int count) {
+    checkWidget ();
+    count = Math.max (0, count);
+    parent.setItemCount (this, count);
+}
+
+/**
+ * Sets the text for multiple columns in the tree. 
+ * 
+ * @param strings the array of new strings
+ *
+ * @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>
+ * 
+ * @since 3.1
+ */
+public void setText (String [] strings) {
+    checkWidget ();
+    if (strings is null) error (DWT.ERROR_NULL_ARGUMENT);
+    for (int i=0; i<strings.length; i++) {
+        String string = strings [i];
+        if (string !is null) setText (i, string);
+    }
+}
+
+/**
+ * Sets the receiver's text at a column
+ *
+ * @param index the column index
+ * @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>
+ * 
+ * @since 3.1
+ */
+public void setText (int index, String string) {
+    checkWidget ();
+    if (string is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (index is 0) {
+        if (string.equals (text)) return;
+        width = -1;
+        super.setText (string);
+    }
+    int count = Math.max (1, parent.columnCount);
+    if (0 <= index && index < count) {
+        if (strings is null) strings = new String [count];
+        if (string.equals (strings [index])) return;
+        strings [index] = string;
+    }
+    cached = true;
+    if (index is 0) parent.setScrollWidth (this);
+    ((NSOutlineView)parent.view).reloadItem_(handle);
+}
+
+public void setText (String string) {
+    checkWidget ();
+    setText (0, string);
+}
+
+}