/*******************************************************************************
 * 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.Table;

import dwt.dwthelper.utils;


import dwt.DWT;
import dwt.DWTException;
import dwt.events.SelectionEvent;
import dwt.events.SelectionListener;
import dwt.graphics.Color;
import dwt.graphics.Font;
import dwt.graphics.GC;
import dwt.graphics.Image;
import dwt.graphics.Point;
import dwt.graphics.Rectangle;
import dwt.internal.cocoa.NSBrowserCell;
import dwt.internal.cocoa.NSButtonCell;
import dwt.internal.cocoa.NSCell;
import dwt.internal.cocoa.NSIndexSet;
import dwt.internal.cocoa.NSMutableIndexSet;
import dwt.internal.cocoa.NSNumber;
import dwt.internal.cocoa.NSPoint;
import dwt.internal.cocoa.NSRange;
import dwt.internal.cocoa.NSRect;
import dwt.internal.cocoa.NSString;
import dwt.internal.cocoa.NSTableColumn;
import dwt.internal.cocoa.NSTableHeaderView;
import dwt.internal.cocoa.NSTableView;
import dwt.internal.cocoa.OS;
import dwt.internal.cocoa.SWTScrollView;
import dwt.internal.cocoa.SWTTableView;

/** 
 * Instances of this class implement a selectable user interface
 * object that displays a list of images and strings and issues
 * notification when selected.
 * <p>
 * The item children that may be added to instances of this class
 * must be of type <code>TableItem</code>.
 * </p><p>
 * Style <code>VIRTUAL</code> is used to create a <code>Table</code> whose
 * <code>TableItem</code>s are to be populated by the client on an on-demand basis
 * instead of up-front.  This can provide significant performance improvements for
 * tables that are very large or for which <code>TableItem</code> population is
 * expensive (for example, retrieving values from an external source).
 * </p><p>
 * Here is an example of using a <code>Table</code> with style <code>VIRTUAL</code>:
 * <code><pre>
 *  final Table table = new Table (parent, DWT.VIRTUAL | DWT.BORDER);
 *  table.setItemCount (1000000);
 *  table.addListener (DWT.SetData, new Listener () {
 *      public void handleEvent (Event event) {
 *          TableItem item = (TableItem) event.item;
 *          int index = table.indexOf (item);
 *          item.setText ("Item " + index);
 *          System.out.println (item.getText ());
 *      }
 *  }); 
 * </pre></code>
 * </p><p>
 * Note that although this class is a subclass of <code>Composite</code>,
 * it does not make sense to add <code>Control</code> children to it,
 * or set a layout on it.
 * </p><p>
 * <dl>
 * <dt><b>Styles:</b></dt>
 * <dd>SINGLE, MULTI, CHECK, FULL_SELECTION, HIDE_SELECTION, VIRTUAL</dd>
 * <dt><b>Events:</b></dt>
 * <dd>Selection, DefaultSelection, SetData, MeasureItem, EraseItem, PaintItem</dd>
 * </dl>
 * </p><p>
 * Note: Only one of the styles SINGLE, and MULTI may be specified.
 * </p><p>
 * IMPORTANT: This class is <em>not</em> intended to be subclassed.
 * </p>
 */
public class Table extends Composite {
    TableItem [] items;
    TableColumn [] columns;
    TableColumn sortColumn;
    TableItem currentItem;
    NSTableHeaderView headerView;
    NSTableColumn firstColumn, checkColumn;
    int columnCount, itemCount, lastIndexOf, sortDirection;
    bool ignoreSelect;

/**
 * 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 composite 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#SINGLE
 * @see DWT#MULTI
 * @see DWT#CHECK
 * @see DWT#FULL_SELECTION
 * @see DWT#HIDE_SELECTION
 * @see DWT#VIRTUAL
 * @see Widget#checkSubclass
 * @see Widget#getStyle
 */
public Table (Composite parent, int style) {
    super (parent, checkStyle (style));
}

/**
 * Adds the listener to the collection of listeners who will
 * be notified when the user changes the receiver's selection, by sending
 * it one of the messages defined in the <code>SelectionListener</code>
 * interface.
 * <p>
 * When <code>widgetSelected</code> is called, the item field of the event object is valid.
 * If the receiver has the <code>DWT.CHECK</code> style and the check selection changes,
 * the event object detail field contains the value <code>DWT.CHECK</code>.
 * <code>widgetDefaultSelected</code> is typically called when an item is double-clicked.
 * The item field of the event object is valid for default selection, but the detail field is not used.
 * </p>
 *
 * @param listener the listener which should be notified when the user changes the receiver's selection
 *
 * @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);
}

TableItem _getItem (int index) {
    if ((style & DWT.VIRTUAL) is 0) return items [index];
    if (items [index] !is null) return items [index];
    return items [index] = new TableItem (this, DWT.NULL, -1, false);
}

bool checkData (TableItem item, bool redraw) {
    if (item.cached) return true;
    if ((style & DWT.VIRTUAL) !is 0) {
        item.cached = true;
        Event event = new Event ();
        event.item = item;
        event.index = indexOf (item);
        currentItem = item;
        sendEvent (DWT.SetData, event);
        //widget could be disposed at this point
        currentItem = null;
        if (isDisposed () || item.isDisposed ()) return false;
        if (redraw) {
//          if (!setScrollWidth (item)) item.redraw (OS.kDataBrowserNoItem);
        }
    }
    return true;
}

static int checkStyle (int style) {
    /*
    * Feature in Windows.  Even when WS_HSCROLL or
    * WS_VSCROLL is not specified, Windows creates
    * trees and tables with scroll bars.  The fix
    * is to set H_SCROLL and V_SCROLL.
    * 
    * NOTE: This code appears on all platforms so that
    * applications have consistent scroll bar behavior.
    */
    if ((style & DWT.NO_SCROLL) is 0) {
        style |= DWT.H_SCROLL | DWT.V_SCROLL;
    }
    return checkBits (style, DWT.SINGLE, DWT.MULTI, 0, 0, 0, 0);
}

protected void checkSubclass () {
    if (!isValidSubclass ()) error (DWT.ERROR_INVALID_SUBCLASS);
}

/**
 * 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 table 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
 *
 * @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 3.0
 */
public void clear (int index) {
    checkWidget();
    if (!(0 <= index && index < itemCount)) error (DWT.ERROR_INVALID_RANGE);
    TableItem item = items [index];
    if (item !is null) {
        if (currentItem !is item) item.clear ();
        if (currentItem is null && drawCount is 0) {
            int [] id = new int [] {index + 1};
//          OS.UpdateDataBrowserItems (handle, 0, id.length, id, OS.kDataBrowserItemNoProperty, OS.kDataBrowserNoItem);
        }
//      setScrollWidth (item);
    }
}

/**
 * Removes the items from the receiver which are between the given
 * zero-relative start and end indices (inclusive).  The text, icon
 * and other attributes of the items are set to their default values.
 * If the table was created with the <code>DWT.VIRTUAL</code> style,
 * these attributes are requested again as needed.
 *
 * @param start the start index of the item to clear
 * @param end the end index of the item to clear
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_RANGE - if either the start or end are 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 3.0
 */
public void clear (int start, int end) {
    checkWidget();
    if (start > end) return;
    if (!(0 <= start && start <= end && end < itemCount)) {
        error (DWT.ERROR_INVALID_RANGE);
    }
    if (start is 0 && end is itemCount - 1) {
        clearAll ();
    } else {
        for (int i=start; i<=end; i++) {
            clear (i);
        }
    }
}

/**
 * Clears the items at the given zero-relative indices in the receiver.
 * The text, icon and other attributes of the items are set to their default
 * values.  If the table was created with the <code>DWT.VIRTUAL</code> style,
 * these attributes are requested again as needed.
 *
 * @param indices the array of indices of the items
 *
 * @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>
 *    <li>ERROR_NULL_ARGUMENT - if the indices array 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 DWT#VIRTUAL
 * @see DWT#SetData
 * 
 * @since 3.0
 */
public void clear (int [] indices) {
    checkWidget();
    if (indices is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (indices.length is 0) return;
    for (int i=0; i<indices.length; i++) {
        if (!(0 <= indices [i] && indices [i] < itemCount)) {
            error (DWT.ERROR_INVALID_RANGE);
        }
    }
    for (int i=0; i<indices.length; i++) {
        clear (indices [i]);
    }
}

/**
 * Clears all the items in the receiver. The text, icon and other
 * attributes of the items are set to their default values. If the
 * table was created with the <code>DWT.VIRTUAL</code> style, these
 * attributes are requested again as needed.
 *
 * @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 3.0
 */
public void clearAll () {
    checkWidget();
    for (int i=0; i<itemCount; i++) {
        TableItem item = items [i];
        if (item !is null) item.clear ();
    }
    if (currentItem is null && drawCount is 0) {
//      OS.UpdateDataBrowserItems (handle, 0, 0, null, OS.kDataBrowserItemNoProperty, OS.kDataBrowserNoItem);
    }
//  setScrollWidth (items, true);
}

public Point computeSize (int wHint, int hHint, bool changed) {
    checkWidget();
    int width = 0;
    if (wHint is DWT.DEFAULT) {
        if (columnCount !is 0) {
            for (int i=0; i<columnCount; i++) {
                width += columns [i].getWidth ();
            }
        } else {
            int columnWidth = 0;
            GC gc = new GC (this);
            for (int i=0; i<itemCount; i++) {
                TableItem item = items [i];
                if (item !is null) {
                    columnWidth = Math.max (columnWidth, item.calculateWidth (0, gc));
                }
            }
            gc.dispose ();
            width += columnWidth + getInsetWidth ();
        }
        if ((style & DWT.CHECK) !is 0) width += getCheckColumnWidth ();
    } else {
        width = wHint;
    }
    if (width <= 0) width = DEFAULT_WIDTH;
    int height = 0;
    if (hHint is DWT.DEFAULT) {
        height = itemCount * getItemHeight () + getHeaderHeight();
    } else {
        height = hHint;
    }
    if (height <= 0) height = DEFAULT_HEIGHT;
    Rectangle rect = computeTrim (0, 0, width, height);
    return new Point (rect.width, rect.height);
}

void createHandle () {
    //TODO - DWT.CHECK  
    SWTScrollView scrollWidget = (SWTScrollView)new SWTScrollView().alloc();
    scrollWidget.initWithFrame(new NSRect ());
    scrollWidget.setHasHorizontalScroller(true);
    scrollWidget.setHasVerticalScroller(true);
    scrollWidget.setAutohidesScrollers(true);
    scrollWidget.setBorderType(hasBorder() ? OS.NSBezelBorder : OS.NSNoBorder);
    scrollWidget.setTag(jniRef);
    
    NSTableView widget = (NSTableView)new SWTTableView().alloc();
    widget.initWithFrame(new NSRect());
    widget.setAllowsMultipleSelection((style & DWT.MULTI) !is 0);
    widget.setDataSource(widget);
    widget.setDelegate(widget);
    widget.setDoubleAction(OS.sel_sendDoubleSelection);
    if (!hasBorder()) widget.setFocusRingType(OS.NSFocusRingTypeNone);
    widget.setTag(jniRef);
    
    headerView = widget.headerView();
    headerView.retain();
    widget.setHeaderView(null);
    
    NSString str = NSString.stringWith("");
    if ((style & DWT.CHECK) !is 0) {
        checkColumn = (NSTableColumn)new NSTableColumn().alloc();
        checkColumn.initWithIdentifier(str);
        checkColumn.headerCell().setTitle(str);
        widget.addTableColumn (checkColumn);
        NSButtonCell cell = (NSButtonCell)new NSButtonCell().alloc().init();
        checkColumn.setDataCell(cell);
        cell.setButtonType(OS.NSSwitchButton);
        cell.setImagePosition(OS.NSImageOnly);
        cell.setAllowsMixedState(true);
        cell.release();
        checkColumn.setWidth(getCheckColumnWidth());
        checkColumn.setResizingMask(OS.NSTableColumnNoResizing);
        checkColumn.setEditable(false);
    }

    firstColumn = (NSTableColumn)new NSTableColumn().alloc();
    firstColumn.initWithIdentifier(str);
    //column.setResizingMask(OS.NSTableColumnAutoresizingMask);
    NSCell cell = (NSBrowserCell)new NSBrowserCell().alloc().init();
    firstColumn.setDataCell(cell);
    cell.release();
    widget.addTableColumn (firstColumn);

    scrollView = scrollWidget;
    view = widget;
    scrollView.setDocumentView(widget);
    parent.contentView().addSubview_(scrollView);
}

void createItem (TableColumn column, int index) {
    if (!(0 <= index && index <= columnCount)) error (DWT.ERROR_INVALID_RANGE);
    if (columnCount is columns.length) {
        TableColumn [] newColumns = new TableColumn [columnCount + 4];
        System.arraycopy (columns, 0, newColumns, 0, columns.length);
        columns = newColumns;
    }
    NSTableColumn nsColumn;
    if (columnCount is 0) {
        //TODO - clear attributes, alignment etc.
        nsColumn = firstColumn;
        firstColumn = null;
    } else {
        //TODO - set attributes, alignment etc.
        nsColumn = (NSTableColumn)new NSTableColumn().alloc();
        nsColumn.initWithIdentifier(NSString.stringWith(""));
        ((NSTableView)view).addTableColumn (nsColumn);
        int checkColumn = (style & DWT.CHECK) !is 0 ? 1 : 0;
        ((NSTableView)view).moveColumn (columnCount + checkColumn, index + checkColumn);
        NSCell cell = (NSBrowserCell)new NSBrowserCell().alloc().init();
        nsColumn.setDataCell(cell);
        cell.release();
    }
    column.nsColumn = nsColumn;
    nsColumn.headerCell().setTitle(NSString.stringWith(""));
    nsColumn.setWidth(0);
    System.arraycopy (columns, index, columns, index + 1, columnCount++ - index);
    columns [index] = column;
    if (columnCount > 1) {
        for (int i=0; i<itemCount; i++) {
            TableItem item = items [i];
            if (item !is null) {
                String [] strings = item.strings;
                if (strings !is null) {
                    String [] temp = new String [columnCount];
                    System.arraycopy (strings, 0, temp, 0, index);
                    System.arraycopy (strings, index, temp, index+1, columnCount-index-1);
                    temp [index] = "";
                    item.strings = temp;
                }
                if (index is 0) item.text = "";
                Image [] images = item.images;
                if (images !is null) {
                    Image [] temp = new Image [columnCount];
                    System.arraycopy (images, 0, temp, 0, index);
                    System.arraycopy (images, index, temp, index+1, columnCount-index-1);
                    item.images = temp;
                }
                if (index is 0) item.image = null;
                Color [] cellBackground = item.cellBackground;
                if (cellBackground !is null) {
                    Color [] temp = new Color [columnCount];
                    System.arraycopy (cellBackground, 0, temp, 0, index);
                    System.arraycopy (cellBackground, index, temp, index+1, columnCount-index-1);
                    item.cellBackground = temp;
                }
                Color [] cellForeground = item.cellForeground;
                if (cellForeground !is null) {
                    Color [] temp = new Color [columnCount];
                    System.arraycopy (cellForeground, 0, temp, 0, index);
                    System.arraycopy (cellForeground, index, temp, index+1, columnCount-index-1);
                    item.cellForeground = temp;
                }
                Font [] cellFont = item.cellFont;
                if (cellFont !is null) {
                    Font [] temp = new Font [columnCount];
                    System.arraycopy (cellFont, 0, temp, 0, index);
                    System.arraycopy (cellFont, index, temp, index+1, columnCount-index-1);
                    item.cellFont = temp;
                }
            }
        }
    }
}

void createItem (TableItem item, int index) {
    if (!(0 <= index && index <= itemCount)) error (DWT.ERROR_INVALID_RANGE);
    if (itemCount is items.length) {
        /* Grow the array faster when redraw is off */
        int length = drawCount is 0 ? items.length + 4 : Math.max (4, items.length * 3 / 2);
        TableItem [] newItems = new TableItem [length];
        System.arraycopy (items, 0, newItems, 0, items.length);
        items = newItems;
    }
    System.arraycopy (items, index, items, index + 1, itemCount++ - index);
    items [index] = item;
    //TODO - use noteNumberOfRowsChanged?
    ((NSTableView)view).reloadData();
}

void createWidget () {
    super.createWidget ();
    items = new TableItem [4];
    columns = new TableColumn [4];
}

Color defaultBackground () {
    return display.getSystemColor (DWT.COLOR_LIST_BACKGROUND);
}

Color defaultForeground () {
    return display.getSystemColor (DWT.COLOR_LIST_FOREGROUND);
}

/**
 * Deselects the item at the given zero-relative index in the receiver.
 * If the item at the index was already deselected, it remains
 * deselected. Indices that are out of range are ignored.
 *
 * @param index the index of the item to deselect
 *
 * @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 deselect (int index) {
    checkWidget();
    if (0 <= index && index < itemCount) {
        NSTableView widget = (NSTableView)view;
        ignoreSelect = true;
        widget.deselectRow (index);
        ignoreSelect = false;
    }
}

/**
 * Deselects the items at the given zero-relative indices in the receiver.
 * If the item at the given zero-relative index in the receiver 
 * is selected, it is deselected.  If the item at the index
 * was not selected, it remains deselected.  The range of the
 * indices is inclusive. Indices that are out of range are ignored.
 *
 * @param start the start index of the items to deselect
 * @param end the end index of the items to deselect
 *
 * @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 deselect (int start, int end) {
    checkWidget();
    //TODO - check range
    if (start is 0 && end is itemCount - 1) {
        deselectAll ();
    } else {
        int length = end - start + 1;
        NSTableView widget = (NSTableView)view;
        ignoreSelect = true;
        for (int i=0; i<length; i++) {
            widget.deselectRow (i);
        }
        ignoreSelect = false;
    }
}

/**
 * Deselects the items at the given zero-relative indices in the receiver.
 * If the item at the given zero-relative index in the receiver 
 * is selected, it is deselected.  If the item at the index
 * was not selected, it remains deselected. Indices that are out
 * of range and duplicate indices are ignored.
 *
 * @param indices the array of indices for the items to deselect
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the set of indices 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>
 */
public void deselect (int [] indices) {
    checkWidget();
    if (indices is null) error (DWT.ERROR_NULL_ARGUMENT);
    NSTableView widget = (NSTableView)view;
    ignoreSelect = true;
    for (int i=0; i<indices.length; i++) {
        widget.deselectRow (indices [i]);
    }
    ignoreSelect = false;
}

/**
 * Deselects all selected items 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>
 */
public void deselectAll () {
    checkWidget ();
    NSTableView widget = (NSTableView)view;
    ignoreSelect = true;
    widget.deselectAll(null);
    ignoreSelect = false;
}

void destroyItem (TableColumn column) {
    int index = 0;
    while (index < columnCount) {
        if (columns [index] is column) break;
        index++;
    }
    for (int i=0; i<itemCount; i++) {
        TableItem item = items [i];
        if (item !is null) {
            if (columnCount <= 1) {
                item.strings = null;
                item.images = null;
                item.cellBackground = null;
                item.cellForeground = null;
                item.cellFont = null;
            } else {
                if (item.strings !is null) {
                    String [] strings = item.strings;
                    if (index is 0) {
                        item.text = strings [1] !is null ? strings [1] : "";
                    }
                    String [] temp = new String [columnCount - 1];
                    System.arraycopy (strings, 0, temp, 0, index);
                    System.arraycopy (strings, index + 1, temp, index, columnCount - 1 - index);
                    item.strings = temp;
                } else {
                    if (index is 0) item.text = "";
                }
                if (item.images !is null) {
                    Image [] images = item.images;
                    if (index is 0) item.image = images [1];
                    Image [] temp = new Image [columnCount - 1];
                    System.arraycopy (images, 0, temp, 0, index);
                    System.arraycopy (images, index + 1, temp, index, columnCount - 1 - index);
                    item.images = temp;
                } else {
                    if (index is 0) item.image = null;
                }
                if (item.cellBackground !is null) {
                    Color [] cellBackground = item.cellBackground;
                    Color [] temp = new Color [columnCount - 1];
                    System.arraycopy (cellBackground, 0, temp, 0, index);
                    System.arraycopy (cellBackground, index + 1, temp, index, columnCount - 1 - index);
                    item.cellBackground = temp;
                }
                if (item.cellForeground !is null) {
                    Color [] cellForeground = item.cellForeground;
                    Color [] temp = new Color [columnCount - 1];
                    System.arraycopy (cellForeground, 0, temp, 0, index);
                    System.arraycopy (cellForeground, index + 1, temp, index, columnCount - 1 - index);
                    item.cellForeground = temp;
                }
                if (item.cellFont !is null) {
                    Font [] cellFont = item.cellFont;
                    Font [] temp = new Font [columnCount - 1];
                    System.arraycopy (cellFont, 0, temp, 0, index);
                    System.arraycopy (cellFont, index + 1, temp, index, columnCount - 1 - index);
                    item.cellFont = temp;
                }
            }
        }
    }
    if (columnCount is 1) {
        //TODO - reset attributes
        firstColumn = column.nsColumn;
        firstColumn.setWidth (0);
    } else {
        ((NSTableView)view).removeTableColumn(column.nsColumn);
    }
    System.arraycopy (columns, index + 1, columns, index, --columnCount - index);
    columns [columnCount] = null;
    for (int i=index; i<columnCount; i++) {
        columns [i].sendEvent (DWT.Move);
    }
}

void destroyItem (TableItem item) {
    int index = 0;
    while (index < itemCount) {
        if (items [index] is item) break;
        index++;
    }
    if (index !is itemCount - 1) fixSelection (index, false); 
    System.arraycopy (items, index + 1, items, index, --itemCount - index);
    items [itemCount] = null;
    ((NSTableView)view).noteNumberOfRowsChanged();
    if (itemCount is 0) {
        setTableEmpty ();
    } else {
//      fixScrollBar ();
    }
}

void fixSelection (int index, bool add) {
    int [] selection = getSelectionIndices ();
    if (selection.length is 0) return;
    int newCount = 0;
    bool fix = false;
    for (int i = 0; i < selection.length; i++) {
        if (!add && selection [i] is index) {
            fix = true;
        } else {
            int newIndex = newCount++;
            selection [newIndex] = selection [i] + 1;
            if (selection [newIndex] - 1 >= index) {
                selection [newIndex] += add ? 1 : -1;
                fix = true;
            }
        }
    }
    if (fix) select (selection, newCount, true);
}

int getCheckColumnWidth () {
    return 20; //TODO - compute width
}

/**
 * Returns the column at the given, zero-relative index in the
 * receiver. Throws an exception if the index is out of range.
 * Columns are returned in the order that they were created.
 * If no <code>TableColumn</code>s were created by the programmer,
 * this method will throw <code>ERROR_INVALID_RANGE</code> despite
 * the fact that a single column of data may be visible in the table.
 * This occurs when the programmer uses the table like a list, adding
 * items but never creating a column.
 *
 * @param index the index of the column to return
 * @return the column 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>
 * 
 * @see Table#getColumnOrder()
 * @see Table#setColumnOrder(int[])
 * @see TableColumn#getMoveable()
 * @see TableColumn#setMoveable(bool)
 * @see DWT#Move
 */
public TableColumn getColumn (int index) {
    checkWidget ();
    if (!(0 <=index && index < columnCount)) error (DWT.ERROR_INVALID_RANGE);
    return columns [index];
}

/**
 * Returns the number of columns contained in the receiver.
 * If no <code>TableColumn</code>s were created by the programmer,
 * this value is zero, despite the fact that visually, one column
 * of items may be visible. This occurs when the programmer uses
 * the table like a list, adding items but never creating a column.
 *
 * @return the number of columns
 *
 * @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 getColumnCount () {
    checkWidget ();
    return columnCount;
}

/**
 * Returns an array of zero-relative integers that map
 * the creation order of the receiver's items to the
 * order in which they are currently being displayed.
 * <p>
 * Specifically, the indices of the returned array represent
 * the current visual order of the items, and the contents
 * of the array represent the creation order of the items.
 * </p><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 current visual order of 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>
 * 
 * @see Table#setColumnOrder(int[])
 * @see TableColumn#getMoveable()
 * @see TableColumn#setMoveable(bool)
 * @see DWT#Move
 * 
 * @since 3.1
 */
public int [] getColumnOrder () {
    checkWidget ();
    int [] order = new int [columnCount];
    int [] position = new int [1];
    for (int i=0; i<columnCount; i++) {
        TableColumn column = columns [i];
//      OS.GetDataBrowserTableViewColumnPosition (handle, column.id, position);
//      if ((style & DWT.CHECK) !is 0) position [0] -= 1;
        order [position [0]] = i;
    }
    return order;
}

/**
 * Returns an array of <code>TableColumn</code>s which are the
 * columns in the receiver.  Columns are returned in the order
 * that they were created.  If no <code>TableColumn</code>s were
 * created by the programmer, the array is empty, despite the fact
 * that visually, one column of items may be visible. This occurs
 * when the programmer uses the table like a list, adding items but
 * never creating a column.
 * <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 items 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>
 * 
 * @see Table#getColumnOrder()
 * @see Table#setColumnOrder(int[])
 * @see TableColumn#getMoveable()
 * @see TableColumn#setMoveable(bool)
 * @see DWT#Move
 */
public TableColumn [] getColumns () {
    checkWidget ();
    TableColumn [] result = new TableColumn [columnCount];
    System.arraycopy (columns, 0, result, 0, columnCount);
    return result;
}

/**
 * Returns the width in pixels of a grid line.
 *
 * @return the width of a grid line in pixels
 * 
 * @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 getGridLineWidth () {
    checkWidget ();
    return 0;
}

/**
 * Returns the height of the receiver's header 
 *
 * @return the height of the header or zero if the header is not visible
 *
 * @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 int getHeaderHeight () {
    checkWidget ();
    NSTableHeaderView headerView = ((NSTableView)view).headerView();
    if (headerView is null) return 0;
    return (int)headerView.bounds().height;
}

/**
 * Returns <code>true</code> if the receiver's header is visible,
 * and <code>false</code> otherwise.
 * <p>
 * If one of the receiver's ancestors is not visible or some
 * other condition makes the receiver not visible, this method
 * may still indicate that it is considered visible even though
 * it may not actually be showing.
 * </p>
 *
 * @return the receiver's header's visibility 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 getHeaderVisible () {
    checkWidget ();
    return ((NSTableView)view).headerView() !is null;
}

int getInsetWidth () {
    //TODO - wrong
    return 20;
}

/**
 * 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>
 */
public TableItem getItem (int index) {
    checkWidget ();
    if (!(0 <= index && index < itemCount)) error (DWT.ERROR_INVALID_RANGE);
    return _getItem (index);
}

/**
 * Returns the item at the given point in the receiver
 * or null if no such item exists. The point is in the
 * coordinate system of the receiver.
 * <p>
 * The item that is returned represents an item that could be selected by the user.
 * For example, if selection only occurs in items in the first column, then null is 
 * returned if the point is outside of the item. 
 * Note that the DWT.FULL_SELECTION style hint, which specifies the selection policy,
 * determines the extent of the selection.
 * </p>
 *
 * @param point the point used to locate the item
 * @return the item at the given point, or null if the point is not in a selectable item
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the point 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>
 */
public TableItem getItem (Point point) {
    checkWidget ();
//  checkItems (true);
//  if (point is null) error (DWT.ERROR_NULL_ARGUMENT);
//  Rect rect = new Rect ();
//  dwt.internal.carbon.Point pt = new dwt.internal.carbon.Point ();
//  OS.SetPt (pt, (short) point.x, (short) point.y);
//  if (0 < lastHittest && lastHittest <= itemCount && lastHittestColumn !is 0) {
//      if (OS.GetDataBrowserItemPartBounds (handle, lastHittest, lastHittestColumn, OS.kDataBrowserPropertyEnclosingPart, rect) is OS.noErr) {
//          if (rect.top <= pt.v && pt.v <= rect.bottom) {
//              if ((style & DWT.FULL_SELECTION) !is 0) {
//                  return _getItem (lastHittest - 1);
//              } else {
//                  return OS.PtInRect (pt, rect) ? _getItem (lastHittest - 1) : null;
//              }
//          }
//      }
//          
//  }
//  int [] top = new int [1], left = new int [1];
//    OS.GetDataBrowserScrollPosition(handle, top, left);
//  short [] height = new short [1];
//  OS.GetDataBrowserTableViewRowHeight (handle, height);
//  short [] header = new short [1];
//  OS.GetDataBrowserListViewHeaderBtnHeight (handle, header);
//  int [] offsets = new int [] {0, 1, -1};
//  for (int i = 0; i < offsets.length; i++) {
//      int index = (top[0] - header [0] + point.y) / height [0] + offsets [i];
//      if (0 <= index && index < itemCount) {
//          if (columnCount is 0) {
//              if (OS.GetDataBrowserItemPartBounds (handle, index + 1, column_id, OS.kDataBrowserPropertyEnclosingPart, rect) is OS.noErr) {
//                  if (rect.top <= pt.v && pt.v <= rect.bottom) {
//                      if ((style & DWT.FULL_SELECTION) !is 0) {
//                          return _getItem (index);
//                      } else {
//                          return OS.PtInRect (pt, rect) ? _getItem (index) : null;
//                      }
//                  }
//              }
//          } else {
//              for (int j = 0; j < columnCount; j++) {
//                  if (OS.GetDataBrowserItemPartBounds (handle, index + 1, columns [j].id, OS.kDataBrowserPropertyEnclosingPart, rect) is OS.noErr) {
//                      if (rect.top <= pt.v && pt.v <= rect.bottom) {
//                          if ((style & DWT.FULL_SELECTION) !is 0) {
//                              return _getItem (index);
//                          } else {
//                              return OS.PtInRect (pt, rect) ? _getItem (index) : null;
//                          }
//                      }
//                  }
//              }
//          }
//      }
//  }
//  //TODO - optimize
//  for (int i=0; i<itemCount; i++) {
//      if (columnCount is 0) {
//          if (OS.GetDataBrowserItemPartBounds (handle, i + 1, column_id, OS.kDataBrowserPropertyEnclosingPart, rect) is OS.noErr) {
//              if (rect.top <= pt.v && pt.v <= rect.bottom) {
//                  if ((style & DWT.FULL_SELECTION) !is 0) {
//                      return _getItem (i);
//                  } else {
//                      return OS.PtInRect (pt, rect) ? _getItem (i) : null;
//                  }
//              }
//          }
//      } else {
//          for (int j = 0; j < columnCount; j++) {
//              if (OS.GetDataBrowserItemPartBounds (handle, i + 1, columns [j].id, OS.kDataBrowserPropertyEnclosingPart, rect) is OS.noErr) {
//                  if (rect.top <= pt.v && pt.v <= rect.bottom) {
//                      if ((style & DWT.FULL_SELECTION) !is 0) {
//                          return _getItem (i);
//                      } else {
//                          return OS.PtInRect (pt, rect) ? _getItem (i) : null;
//                      }
//                  }
//              }
//          }
//      }
//  }
    return null;
}

/**
 * Returns the number of items contained in 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 ();
    return itemCount;
}

/**
 * Returns the height of the area which would be used to
 * display <em>one</em> of the items in the receiver's.
 *
 * @return the height of one 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 int getItemHeight () {
    checkWidget ();
    return (int)((NSTableView)view).rowHeight();
}

/**
 * Returns a (possibly empty) array of <code>TableItem</code>s which
 * are the items in 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 items 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>
 */
public TableItem [] getItems () {
    checkWidget ();
    TableItem [] result = new TableItem [itemCount];
    if ((style & DWT.VIRTUAL) !is 0) {
        for (int i=0; i<itemCount; i++) {
            result [i] = _getItem (i);
        }
    } else {
        System.arraycopy (items, 0, result, 0, itemCount);
    }
    return result;
}

/**
 * Returns <code>true</code> if the receiver's lines are visible,
 * and <code>false</code> otherwise.
 * <p>
 * If one of the receiver's ancestors is not visible or some
 * other condition makes the receiver not visible, this method
 * may still indicate that it is considered visible even though
 * it may not actually be showing.
 * </p>
 *
 * @return the visibility state of the lines
 *
 * @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 getLinesVisible () {
    checkWidget ();
//  if (OS.VERSION >= 0x1040) {
//      int [] attrib = new int [1];
//      OS.DataBrowserGetAttributes (handle, attrib);
//      return (attrib [0] & (OS.kDataBrowserAttributeListViewAlternatingRowColors | OS.kDataBrowserAttributeListViewDrawColumnDividers)) !is 0;
//  }
    return false;
}

/**
 * Returns an array of <code>TableItem</code>s that are currently
 * selected in the receiver. The order of the items is unspecified.
 * An empty array indicates that no items are selected.
 * <p>
 * Note: This is not the actual structure used by the receiver
 * to maintain its selection, so modifying the array will
 * not affect the receiver. 
 * </p>
 * @return an array representing the selection
 *
 * @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 TableItem [] getSelection () {
    checkWidget ();
    NSTableView widget = (NSTableView)view;
    if (widget.numberOfSelectedRows() is 0) {
        return new TableItem [0];
    }
    NSIndexSet selection = widget.selectedRowIndexes();
    int count = selection.count();
    int [] indexBuffer = new int [count];
    selection.getIndexes(indexBuffer, count, 0);
    TableItem [] result = new TableItem  [count];
    for (int i=0; i<count; i++) {
        result [i] = _getItem (indexBuffer [i]);
    }
    return result;
}

/**
 * Returns the number of selected items contained in the receiver.
 *
 * @return the number of selected 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 getSelectionCount () {
    checkWidget ();
    return ((NSTableView)view).numberOfSelectedRows();
}

/**
 * Returns the zero-relative index of the item which is currently
 * selected in the receiver, or -1 if no item is selected.
 *
 * @return the index of the selected 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 int getSelectionIndex () {
    checkWidget();
    //TODO - check empty selection case
    return ((NSTableView)view).selectedRow();
}

/**
 * Returns the zero-relative indices of the items which are currently
 * selected in the receiver. The order of the indices is unspecified.
 * The array is empty if no items are selected.
 * <p>
 * Note: This is not the actual structure used by the receiver
 * to maintain its selection, so modifying the array will
 * not affect the receiver. 
 * </p>
 * @return the array of indices of the selected 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 [] getSelectionIndices () {
    checkWidget ();
    NSTableView widget = (NSTableView)view;
    if (widget.numberOfSelectedRows() is 0) {
        return new int [0];
    }
    NSIndexSet selection = widget.selectedRowIndexes();
    int count = selection.count();
    int [] result = new int [count];
    selection.getIndexes(result, count, 0);
    return result;
}

/**
 * Returns the column which shows the sort indicator for
 * the receiver. The value may be null if no column shows
 * the sort indicator.
 *
 * @return the sort indicator 
 *
 * @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 #setSortColumn(TableColumn)
 * 
 * @since 3.2
 */
public TableColumn getSortColumn () {
    checkWidget ();
    return sortColumn;
}

/**
 * Returns the direction of the sort indicator for the receiver. 
 * The value will be one of <code>UP</code>, <code>DOWN</code> 
 * or <code>NONE</code>.
 *
 * @return the sort direction
 *
 * @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 #setSortDirection(int)
 * 
 * @since 3.2
 */
public int getSortDirection () {
    checkWidget ();
    return sortDirection;
}

/**
 * Returns the zero-relative index of the item which is currently
 * at the top of the receiver. This index can change when items are
 * scrolled or new items are added or removed.
 *
 * @return the index of the top 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 int getTopIndex () {
    checkWidget();
    //TODO - partial item at the top
    NSRect rect = scrollView.documentVisibleRect();
    NSPoint point = new NSPoint();
    point.x = rect.x;
    point.y = rect.y;
    return ((NSTableView)view).rowAtPoint(point);
}


/**
 * Searches the receiver's list starting at the first column
 * (index 0) until a column is found that is equal to the 
 * argument, and returns the index of that column. If no column
 * is found, returns -1.
 *
 * @param column the search column
 * @return the index of the column
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the column 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>
 */
public int indexOf (TableColumn column) {
    checkWidget ();
    if (column is null) error (DWT.ERROR_NULL_ARGUMENT);
    for (int i=0; i<columnCount; i++) {
        if (columns [i] is column) return i;
    }
    return -1;
}

/**
 * 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>
 * </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 indexOf (TableItem item) {
    checkWidget ();
    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (1 <= lastIndexOf && lastIndexOf < itemCount - 1) {
        if (items [lastIndexOf] is item) return lastIndexOf;
        if (items [lastIndexOf + 1] is item) return ++lastIndexOf;
        if (items [lastIndexOf - 1] is item) return --lastIndexOf;
    }
    if (lastIndexOf < itemCount / 2) {
        for (int i=0; i<itemCount; i++) {
            if (items [i] is item) return lastIndexOf = i;
        }
    } else {
        for (int i=itemCount - 1; i>=0; --i) {
            if (items [i] is item) return lastIndexOf = i;
        }
    }
    return -1;
}

/**
 * Returns <code>true</code> if the item is selected,
 * and <code>false</code> otherwise.  Indices out of
 * range are ignored.
 *
 * @param index the index of the item
 * @return the selection state of the item at the index
 *
 * @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 isSelected (int index) {
    checkWidget();
    //TODO - range check
    return ((NSTableView)view).isRowSelected(index);
}

int numberOfRowsInTableView(int aTableView) {
    return itemCount;
}

void releaseChildren (bool destroy) {
    if (items !is null) {
        for (int i=0; i<itemCount; i++) {
            TableItem item = items [i];
            if (item !is null && !item.isDisposed ()) {
                item.release (false);
            }
        }
        items = null;
    }
    if (columns !is null) {
        for (int i=0; i<columnCount; i++) {
            TableColumn column = columns [i];
            if (column !is null && !column.isDisposed ()) {
                column.release (false);
            }
        }
        columns = null;
    }
    super.releaseChildren (destroy);
}

void releaseHandle () {
    super.releaseHandle ();
    if (headerView !is null) headerView.release();
    headerView = null;
    if (firstColumn !is null) firstColumn.release();
    firstColumn = null;
    if (checkColumn !is null) checkColumn.release();
    checkColumn = null;
}

void releaseWidget () { 
    super.releaseWidget ();
    currentItem = null;
    sortColumn = null;
}

/**
 * Removes the item from the receiver at the given
 * zero-relative index.
 *
 * @param index the index for the item
 *
 * @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>
 */
public void remove (int index) {
    checkWidget();
    if (!(0 <= index && index < itemCount)) error (DWT.ERROR_INVALID_RANGE);
    TableItem item = items [index];
    if (item !is null) item.release (false);
    if (index !is itemCount - 1) fixSelection (index, false);
    System.arraycopy (items, index + 1, items, index, --itemCount - index);
    items [itemCount] = null;
    ((NSTableView)view).noteNumberOfRowsChanged();
    if (itemCount is 0) {
        setTableEmpty ();
    } else {
//      fixScrollBar ();
    }
}

/**
 * Removes the items from the receiver which are
 * between the given zero-relative start and end 
 * indices (inclusive).
 *
 * @param start the start of the range
 * @param end the end of the range
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_RANGE - if either the start or end are 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>
 */
public void remove (int start, int end) {
    checkWidget();
    if (start > end) return;
    if (!(0 <= start && start <= end && end < itemCount)) {
        error (DWT.ERROR_INVALID_RANGE);
    }
    if (start is 0 && end is itemCount - 1) {
        removeAll ();
    } else {
        int length = end - start + 1;
        for (int i=0; i<length; i++) remove (start);
    }
}

/**
 * Removes the items from the receiver's list at the given
 * zero-relative indices.
 *
 * @param indices the array of indices of the items
 *
 * @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>
 *    <li>ERROR_NULL_ARGUMENT - if the indices array 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>
 */
public void remove (int [] indices) {
    checkWidget ();
    if (indices is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (indices.length is 0) return;
    int [] newIndices = new int [indices.length];
    System.arraycopy (indices, 0, newIndices, 0, indices.length);
    sort (newIndices);
    int start = newIndices [newIndices.length - 1], end = newIndices [0];
    if (!(0 <= start && start <= end && end < itemCount)) {
        error (DWT.ERROR_INVALID_RANGE);
    }
    int last = -1;
    for (int i=0; i<newIndices.length; i++) {
        int index = newIndices [i];
        if (index !is last) {
            remove (index);
            last = index;
        }
    }
}

/**
 * Removes all of the items from 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>
 */
public void removeAll () {
    checkWidget();
    for (int i=0; i<itemCount; i++) {
        TableItem item = items [i];
        if (item !is null && !item.isDisposed ()) item.release (false);
    }
    setTableEmpty ();
    ((NSTableView)view).noteNumberOfRowsChanged();
}

/**
 * Removes the listener from the collection of listeners who will
 * be notified when the user changes the receiver's selection.
 *
 * @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(SelectionListener)
 */
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);  
}

/**
 * Selects the item at the given zero-relative index in the receiver. 
 * If the item at the index was already selected, it remains
 * selected. Indices that are out of range are ignored.
 *
 * @param index the index of the item to select
 *
 * @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 select (int index) {
    checkWidget();
    if (0 <= index && index < itemCount) {
        NSIndexSet indexes = (NSIndexSet)new NSIndexSet().alloc();
        indexes.initWithIndex(index);
        NSTableView widget = (NSTableView)view;
        ignoreSelect = true;
        ((NSTableView)view).selectRowIndexes(indexes, true);
        ignoreSelect = false;
    }
}

/**
 * Selects the items in the range specified by the given zero-relative
 * indices in the receiver. The range of indices is inclusive.
 * The current selection is not cleared before the new items are selected.
 * <p>
 * If an item in the given range is not selected, it is selected.
 * If an item in the given range was already selected, it remains selected.
 * Indices that are out of range are ignored and no items will be selected
 * if start is greater than end.
 * If the receiver is single-select and there is more than one item in the
 * given range, then all indices are ignored.
 * </p>
 *
 * @param start the start of the range
 * @param end the end of the range
 *
 * @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 Table#setSelection(int,int)
 */
public void select (int start, int end) {
    checkWidget ();
    if (end < 0 || start > end || ((style & DWT.SINGLE) !is 0 && start !is end)) return;
    if (itemCount is 0 || start >= itemCount) return;
    if (start is 0 && end is itemCount - 1) {
        selectAll ();
    } else {
        start = Math.max (0, start);
        end = Math.min (end, itemCount - 1);
        int length = end - start + 1;
        NSIndexSet indexes = (NSIndexSet)new NSIndexSet().alloc();
        NSRange range = new NSRange();
        range.location = start;
        range.length = length;
        indexes.initWithIndexesInRange(range);
        NSTableView widget = (NSTableView)view;
        ignoreSelect = true;
        widget.selectRowIndexes(indexes, true);
        ignoreSelect = false;
    }
}

/**
 * Selects the items at the given zero-relative indices in the receiver.
 * The current selection is not cleared before the new items are selected.
 * <p>
 * If the item at a given index is not selected, it is selected.
 * If the item at a given index was already selected, it remains selected.
 * Indices that are out of range and duplicate indices are ignored.
 * If the receiver is single-select and multiple indices are specified,
 * then all indices are ignored.
 * </p>
 *
 * @param indices the array of indices for the items to select
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the array of indices 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 Table#setSelection(int[])
 */
public void select (int [] indices) {
    checkWidget ();
    if (indices is null) error (DWT.ERROR_NULL_ARGUMENT);
    int length = indices.length;
    if (length is 0 || ((style & DWT.SINGLE) !is 0 && length > 1)) return;
    int count = 0;
    NSMutableIndexSet indexes = (NSMutableIndexSet)new NSMutableIndexSet().alloc().init();
    for (int i=0; i<length; i++) {
        int index = indices [length - i - 1];
        if (index >= 0 && index < itemCount) {
            indexes.addIndex (indices [i]);
            count++;
        }
    }
    if (count > 0) {
        NSTableView widget = (NSTableView)view;
        ignoreSelect = true;
        widget.selectRowIndexes(indexes, true);
        ignoreSelect = false;
    }
}

void select (int [] ids, int count, bool clear) {
    NSMutableIndexSet indexes = (NSMutableIndexSet)new NSMutableIndexSet().alloc().init();
    for (int i=0; i<count; i++) indexes.addIndex (ids [i] - 1); //WRONG -1
    NSTableView widget = (NSTableView)view;
    ignoreSelect = true;
    widget.selectRowIndexes(indexes, !clear);
    ignoreSelect = false;
}

/**
 * Selects all of the items in the receiver.
 * <p>
 * If the receiver is single-select, do nothing.
 * </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>
 */
public void selectAll () {
    checkWidget ();
    if ((style & DWT.SINGLE) !is 0) return;
    NSTableView widget = (NSTableView)view;
    ignoreSelect = true;
    widget.selectAll(null);
    ignoreSelect = false;
}

/**
 * Sets the order that the items in the receiver should 
 * be displayed in to the given argument which is described
 * in terms of the zero-relative ordering of when the items
 * were added.
 *
 * @param order the new order to display the 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>
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the item order is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the item order is not the same length as the number of items</li>
 * </ul>
 * 
 * @see Table#getColumnOrder()
 * @see TableColumn#getMoveable()
 * @see TableColumn#setMoveable(bool)
 * @see DWT#Move
 * 
 * @since 3.1
 */
public void setColumnOrder (int [] order) {
    checkWidget ();
    if (order is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (columnCount is 0) {
        if (order.length !is 0) error (DWT.ERROR_INVALID_ARGUMENT);
        return;
    }
    if (order.length !is columnCount) error (DWT.ERROR_INVALID_ARGUMENT);
    int [] oldOrder = getColumnOrder ();
    bool reorder = false;
    bool [] seen = new bool [columnCount];
    for (int i=0; i<order.length; i++) {
        int index = order [i];
        if (index < 0 || index >= columnCount) error (DWT.ERROR_INVALID_ARGUMENT);
        if (seen [index]) error (DWT.ERROR_INVALID_ARGUMENT);
        seen [index] = true;
        if (order [i] !is oldOrder [i]) reorder = true;
    }
    if (reorder) {
        int x = 0;
        short [] width = new short [1];
        int [] oldX = new int [oldOrder.length];
        for (int i=0; i<oldOrder.length; i++) {
            int index = oldOrder [i];
            TableColumn column = columns [index];
            oldX [index] =  x;
//          OS.GetDataBrowserTableViewNamedColumnWidth(handle, column.id, width);
            x += width [0];
        }
        x = 0;
        int [] newX = new int [order.length];
        for (int i=0; i<order.length; i++) {
            int index = order [i];
            TableColumn column = columns [index];
            int position = (style & DWT.CHECK) !is 0 ? i + 1 : i;
//          OS.SetDataBrowserTableViewColumnPosition(handle, column.id, position);
//          column.lastPosition = position;
            newX [index] =  x;
//          OS.GetDataBrowserTableViewNamedColumnWidth(handle, column.id, width);
            x += width [0];
        }
        TableColumn[] newColumns = new TableColumn [columnCount];
        System.arraycopy (columns, 0, newColumns, 0, columnCount);
        for (int i=0; i<columnCount; i++) {
            TableColumn column = newColumns [i];
            if (!column.isDisposed ()) {
                if (newX [i] !is oldX [i]) {
                    column.sendEvent (DWT.Move);
                }
            }
        }
    }
}

/**
 * Marks the receiver's header as visible if the argument is <code>true</code>,
 * and marks it invisible otherwise. 
 * <p>
 * If one of the receiver's ancestors is not visible or some
 * other condition makes the receiver not visible, marking
 * it visible may not actually cause it to be displayed.
 * </p>
 *
 * @param show the new visibility 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 setHeaderVisible (bool show) {
    checkWidget ();
    ((NSTableView)view).setHeaderView (show ? headerView : null);
}

/**
 * Sets the number of 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 3.0
 */
public void setItemCount (int count) {
    checkWidget ();
//  checkItems (true);
//  count = Math.max (0, count);
//  if (count is itemCount) return;
//  setRedraw (false);
//    int[] top = new int [1], left = new int [1];
//    OS.GetDataBrowserScrollPosition (handle, top, left);
//    DataBrowserCallbacks callbacks = new DataBrowserCallbacks ();
//  OS.GetDataBrowserCallbacks (handle, callbacks);
//  callbacks.v1_itemNotificationCallback = 0;
//  callbacks.v1_itemCompareCallback = 0;
//  OS.SetDataBrowserCallbacks (handle, callbacks);
//  if (count < itemCount) {
//      int index = count;
//      int[] id = new int [itemCount - count];
//      while (index < itemCount) {
//          TableItem item = items [index];
//          if (item !is null) item.release (false);
//          id [index-count] = index + 1;
//          index++;
//      }
//      OS.RemoveDataBrowserItems (handle, OS.kDataBrowserNoItem, id.length, id, 0);
//      int [] newItemCount = new int [1];
//      if (OS.GetDataBrowserItemCount (handle, OS.kDataBrowserNoItem, true, OS.kDataBrowserItemAnyState, newItemCount) !is OS.noErr) {
//          error (DWT.ERROR_CANNOT_GET_COUNT);
//      }
//      if (count !is newItemCount[0]) error (DWT.ERROR_ITEM_NOT_REMOVED);
//  }
//  int length = Math.max (4, (count + 3) / 4 * 4);
//  TableItem [] newItems = new TableItem [length];
//  System.arraycopy (items, 0, newItems, 0, Math.min (count, itemCount));
//  items = newItems;
//  if ((style & DWT.VIRTUAL) is 0) {
//      for (int i=itemCount; i<count; i++) {
//          items [i] = new TableItem (this, DWT.NONE, i, false);
//      }
//  }
//  itemCount = count;
//  OS.AddDataBrowserItems (handle, 0, itemCount, null, OS.kDataBrowserItemNoProperty);
//  callbacks.v1_itemNotificationCallback = display.itemNotificationProc;
//  callbacks.v1_itemCompareCallback = itemCompareProc ();
//  OS.SetDataBrowserCallbacks (handle, callbacks);
//  fixScrollBar ();
//  setRedraw (true);
}

/*public*/ void setItemHeight (int itemHeight) {
    checkWidget ();
    if (itemHeight < -1) error (DWT.ERROR_INVALID_ARGUMENT);
    if (itemHeight is -1) {
        //TODO - reset item height, ensure other API's such as setFont don't do this
    } else {
//      OS.SetDataBrowserTableViewRowHeight (handle, (short) itemHeight);
    }
}

/**
 * Marks the receiver's lines as visible if the argument is <code>true</code>,
 * and marks it invisible otherwise. 
 * <p>
 * If one of the receiver's ancestors is not visible or some
 * other condition makes the receiver not visible, marking
 * it visible may not actually cause it to be displayed.
 * </p>
 *
 * @param show the new visibility 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 setLinesVisible (bool show) {
    checkWidget ();
    ((NSTableView)view).setUsesAlternatingRowBackgroundColors(show);
}

bool setScrollWidth (TableItem item) {
    if (columnCount !is 0) return false;
    if (currentItem !is null) {
//      if (currentItem !is item) fixScrollWidth = true;
        return false;
    }
    if (drawCount !is 0) return false;
    GC gc = new GC (this);
    int newWidth = item.calculateWidth (0, gc);
    gc.dispose ();
    newWidth += getInsetWidth ();
//  short [] width = new short [1];
//  OS.GetDataBrowserTableViewNamedColumnWidth (handle, column_id, width);
//  if (width [0] < newWidth) {
//      OS.SetDataBrowserTableViewNamedColumnWidth (handle, column_id, (short) newWidth);
//      return true;
//  }
    if (firstColumn.width() < newWidth) {
        firstColumn.setWidth (newWidth);
    }
    return false;
}

bool setScrollWidth (TableItem [] items, bool set) {
    if (columnCount !is 0) return false;
    if (currentItem !is null) {
//      fixScrollWidth = true;
        return false;
    }
    if (drawCount !is 0) return false;
    GC gc = new GC (this);
    int newWidth = 0;
    for (int i = 0; i < items.length; i++) {
        TableItem item = items [i];
        if (item !is null) {
            newWidth = Math.max (newWidth, item.calculateWidth (0, gc));
        }
    }
    gc.dispose ();
    newWidth += getInsetWidth ();
//  if (!set) {
//      short [] width = new short [1];
//      OS.GetDataBrowserTableViewNamedColumnWidth (handle, column_id, width);
//      if (width [0] >= newWidth) return false;
//  }
//  OS.SetDataBrowserTableViewNamedColumnWidth (handle, column_id, (short) newWidth);
    if (!set) {
        if (firstColumn.width() > newWidth) return false;
    }
    firstColumn.setWidth (newWidth);
    return true;
}

/**
 * Selects the item at the given zero-relative index in the receiver. 
 * The current selection is first cleared, then the new item is selected.
 *
 * @param index the index of the item to select
 *
 * @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 Table#deselectAll()
 * @see Table#select(int)
 */
public void setSelection (int index) {
    checkWidget();
    //TODO - optimize to use expand flag
    deselectAll ();
    setSelection (index, false);
}

void setSelection (int index, bool notify) {
//  checkWidget();
    if (0 <= index && index < itemCount) {
        select (index);
        showIndex (index);
        if (notify) {
            Event event = new Event ();
            event.item = _getItem (index);
            postEvent (DWT.Selection, event);
        }
    }
}

/**
 * Selects the items in the range specified by the given zero-relative
 * indices in the receiver. The range of indices is inclusive.
 * The current selection is cleared before the new items are selected.
 * <p>
 * Indices that are out of range are ignored and no items will be selected
 * if start is greater than end.
 * If the receiver is single-select and there is more than one item in the
 * given range, then all indices are ignored.
 * </p>
 * 
 * @param start the start index of the items to select
 * @param end the end index of the items to select
 *
 * @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 Table#deselectAll()
 * @see Table#select(int,int)
 */
public void setSelection (int start, int end) {
    checkWidget ();
    //TODO - optimize to use expand flag
    deselectAll ();
    if (end < 0 || start > end || ((style & DWT.SINGLE) !is 0 && start !is end)) return;
    if (itemCount is 0 || start >= itemCount) return;
    start = Math.max (0, start);
    end = Math.min (end, itemCount - 1);
    select (start, end);
    showIndex (start);
}

/**
 * Selects the items at the given zero-relative indices in the receiver.
 * The current selection is cleared before the new items are selected.
 * <p>
 * Indices that are out of range and duplicate indices are ignored.
 * If the receiver is single-select and multiple indices are specified,
 * then all indices are ignored.
 * </p>
 *
 * @param indices the indices of the items to select
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the array of indices 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 Table#deselectAll()
 * @see Table#select(int[])
 */
public void setSelection (int [] indices) {
    checkWidget ();
    if (indices is null) error (DWT.ERROR_NULL_ARGUMENT);
    //TODO - optimize to use expand flag
    deselectAll ();
    int length = indices.length;
    if (length is 0 || ((style & DWT.SINGLE) !is 0 && length > 1)) return;
    select (indices);
    showIndex (indices [0]);
}

/**
 * Sets the receiver's selection to the given item.
 * The current selection is cleared before the new item is selected.
 * <p>
 * If the item is not in the receiver, then it is ignored.
 * </p>
 *
 * @param item the item to select
 *
 * @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 3.2
 */
public void setSelection (TableItem  item) {
    checkWidget ();
    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
    setSelection (new TableItem [] {item});
}

/**
 * Sets the receiver's selection to be the given array of items.
 * The current selection is cleared before the new items are selected.
 * <p>
 * Items that are not in the receiver are ignored.
 * If the receiver is single-select and multiple items are specified,
 * then all items are ignored.
 * </p>
 *
 * @param items the array of items
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the array of items is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if one of the items 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>
 *
 * @see Table#deselectAll()
 * @see Table#select(int[])
 * @see Table#setSelection(int[])
 */
public void setSelection (TableItem [] items) {
    checkWidget ();
    if (items is null) error (DWT.ERROR_NULL_ARGUMENT);
    //TODO - optimize to use expand flag
    deselectAll ();
    int length = items.length;
    if (length is 0 || ((style & DWT.SINGLE) !is 0 && length > 1)) return;
    int [] indices = new int [length];
    int count = 0;
    for (int i=0; i<length; i++) {
        int index = indexOf (items [length - i - 1]);
        if (index !is -1) {
            indices [count++] = index;
        }
    }
    if (count > 0) {
        select (indices);
        showIndex (indices [0] - 1);
    }
}

/**
 * Sets the column used by the sort indicator for the receiver. A null
 * value will clear the sort indicator.  The current sort column is cleared 
 * before the new column is set.
 *
 * @param column the column used by the sort indicator or <code>null</code>
 * 
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the column is 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 3.2
 */
public void setSortColumn (TableColumn column) {
    checkWidget ();
    if (column !is null && column.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT);
    if (column is sortColumn) return;
//  DataBrowserCallbacks callbacks = new DataBrowserCallbacks ();
//  OS.GetDataBrowserCallbacks (handle, callbacks);
//  callbacks.v1_itemCompareCallback = display.itemCompareProc;
//  OS.SetDataBrowserCallbacks (handle, callbacks);
//  if (column is null) {
//      if (sortColumn !is null  && !sortColumn.isDisposed ()  && sortDirection !is DWT.NONE) {
//          OS.SetDataBrowserSortOrder (handle, (short) OS.kDataBrowserOrderIncreasing);
//          sortColumn = null; 
//          OS.SetDataBrowserSortProperty (handle, 0);
//      }
//  }
//  sortColumn = column;
//  if (sortColumn !is null  && !sortColumn.isDisposed () && sortDirection !is DWT.NONE) {
//      OS.SetDataBrowserSortProperty (handle, sortColumn.id);
//      int order = sortDirection is DWT.DOWN ? OS.kDataBrowserOrderDecreasing : OS.kDataBrowserOrderIncreasing;
//      OS.SetDataBrowserSortOrder (handle, (short) order);
//  }
//  callbacks.v1_itemCompareCallback = itemCompareProc ();
//  OS.SetDataBrowserCallbacks (handle, callbacks);
}

/**
 * Sets the direction of the sort indicator for the receiver. The value 
 * can be one of <code>UP</code>, <code>DOWN</code> or <code>NONE</code>.
 *
 * @param direction the direction of the sort indicator 
 *
 * @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 setSortDirection  (int direction) {
    checkWidget ();
    if (direction !is DWT.UP && direction !is DWT.DOWN && direction !is DWT.NONE) return;
    if (direction is sortDirection) return;
    sortDirection = direction;
//  DataBrowserCallbacks callbacks = new DataBrowserCallbacks ();
//  OS.GetDataBrowserCallbacks (handle, callbacks);
//  callbacks.v1_itemCompareCallback = display.itemCompareProc;
//  OS.SetDataBrowserCallbacks (handle, callbacks);
//  if (sortColumn !is null && !sortColumn.isDisposed ()) {
//      if (sortDirection is DWT.NONE) {
//          OS.SetDataBrowserSortOrder (handle, (short) OS.kDataBrowserOrderIncreasing);
//          TableColumn column = sortColumn;
//          sortColumn = null; 
//          OS.SetDataBrowserSortProperty (handle, 0);
//          sortColumn = column;
//      } else {
//          OS.SetDataBrowserSortProperty (handle, 0);
//          OS.SetDataBrowserSortProperty (handle, sortColumn.id);
//          int order = sortDirection is DWT.DOWN ? OS.kDataBrowserOrderDecreasing : OS.kDataBrowserOrderIncreasing;
//          OS.SetDataBrowserSortOrder (handle, (short) order);
//      }
//  }
//  callbacks.v1_itemCompareCallback = itemCompareProc ();
//  OS.SetDataBrowserCallbacks (handle, callbacks);
}

void setTableEmpty () {
    itemCount = 0;
    items = new TableItem [4];
}

/**
 * Sets the zero-relative index of the item which is currently
 * at the top of the receiver. This index can change when items
 * are scrolled or new items are added and removed.
 *
 * @param index the index of the top 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 void setTopIndex (int index) {
    checkWidget();
    NSRect rect = ((NSTableView)view).rectOfRow(index);
    ((NSTableView)view).scrollRectToVisible(rect);
}

/**
 * Shows the column.  If the column is already showing in the receiver,
 * this method simply returns.  Otherwise, the columns are scrolled until
 * the column is visible.
 *
 * @param column the column to be shown
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the column is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if the column 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 showColumn (TableColumn column) {
    checkWidget ();
    if (column is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (column.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
    if (column.parent !is this) return;
    int index = indexOf (column);
    if (columnCount <= 1 || !(0 <= index && index < columnCount)) return;
    ((NSTableView)view).scrollColumnToVisible(index + ((style & DWT.CHECK) !is 0 ? 1 : 0));
}

void showIndex (int index) {
    if (0 <= index && index < itemCount) {
        ((NSTableView)view).scrollRowToVisible(index);
    }
}

/**
 * Shows the item.  If the item is already showing in the receiver,
 * this method simply returns.  Otherwise, the items are scrolled until
 * the item is visible.
 *
 * @param item the item to be shown
 *
 * @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>
 *
 * @see Table#showSelection()
 */
public void showItem (TableItem item) {
    checkWidget ();
    if (item is null) error (DWT.ERROR_NULL_ARGUMENT);
    if (item.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT);
    int index = indexOf (item);
    if (index !is -1) showIndex (index);
}

/**
 * Shows the selection.  If the selection is already showing in the receiver,
 * this method simply returns.  Otherwise, the items are scrolled until
 * the selection is visible.
 *
 * @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 Table#showItem(TableItem)
 */
public void showSelection () {
    checkWidget();
    int index = getSelectionIndex ();
    if (index >= 0) showIndex (index);
}

void sendDoubleSelection() {
    postEvent (DWT.DefaultSelection);
}

void tableViewSelectionDidChange (int aNotification) {
    if (ignoreSelect) return;
    NSTableView widget = (NSTableView)view;
    int row = widget.selectedRow();
    if(row is -1)
        postEvent(DWT.Selection);
    else {
        TableItem item = _getItem(row);
        Event event = new Event();
        event.item = item;
        event.index = row;
        postEvent(DWT.Selection, event);
    }
}

int tableView_objectValueForTableColumn_row(int aTableView, int aTableColumn, int rowIndex) {
    TableItem item = items [rowIndex];
    if (checkColumn !is null && aTableColumn is checkColumn.id) {
        NSNumber value;
        if (item.checked && item.grayed) {
            value = NSNumber.numberWithInt(OS.NSMixedState);
        } else {
            value = NSNumber.numberWithInt(item.checked ? OS.NSOnState : OS.NSOffState);
        }
        return value.id;
    }
    for (int i=0; i<columnCount; i++) {
        if (columns [i].nsColumn.id is aTableColumn) {
            return item.createString(i).id;
        }
    }
    return item.createString(0).id;
}

void tableView_setObjectValue_forTableColumn_row(int aTableView, int anObject, int aTableColumn, int rowIndex) {
    TableItem item = items [rowIndex];
    if (checkColumn !is null && aTableColumn is checkColumn.id)  {
        item.checked = !item.checked;
        Event event = new Event();
        event.detail = DWT.CHECK;
        event.item = item;
        event.index = rowIndex;
        postEvent(DWT.Selection, event);
    }
}

bool tableView_shouldEditTableColumn_row(int aTableView, int aTableColumn, int rowIndex) {
    return false;
}

void tableView_willDisplayCell_forTableColumn_row(int aTableView, int aCell, int aTableColumn, int rowIndex) {
    if (checkColumn !is null && aTableColumn is checkColumn.id) return;
    TableItem item = items [rowIndex];
    Image image = item.image;
    for (int i=0; i<columnCount; i++) {
        if (columns [i].nsColumn.id is aTableColumn) {
            image = item.getImage(i);
        }
    }
    NSBrowserCell cell = new NSBrowserCell(aCell);
    cell.setImage(image !is null ? image.handle : null);
    cell.setLeaf(true);
}
}