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    The osx x86_64 swt jar as available in the Eclipse 4.6 (Neon) release for OSX. It is suitable for use with jface and other dependencies available from maven central in the org.eclipse.scout.sdk.deps group. The sources is copied from swt-4.6-cocoa-macosx-x86_64.zip from http://download.eclipse.org/eclipse/downloads/drops4/R-4.6-201606061100/ and javadoc is generated from sources.

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    /*******************************************************************************
 * Copyright (c) 2000, 2012 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
 *******************************************************************************/
package org.eclipse.swt.widgets;

import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.internal.cocoa.*;

/**
 * Instances of this class provide a selectable user interface object
 * that displays a hierarchy of items and issues notification when an
 * item in the hierarchy is selected.
 * 
    
 * The item children that may be added to instances of this class
 * must be of type TreeItem.
 * 
    
 * Style VIRTUAL is used to create a Tree whose
 * TreeItems are to be populated by the client on an on-demand basis
 * instead of up-front.  This can provide significant performance improvements for
 * trees that are very large or for which TreeItem population is
 * expensive (for example, retrieving values from an external source).
 * 
    
 * Here is an example of using a Tree with style VIRTUAL:
 * 
     *  final Tree tree = new Tree(parent, SWT.VIRTUAL | SWT.BORDER);
 *  tree.setItemCount(20);
 *  tree.addListener(SWT.SetData, new Listener() {
 *      public void handleEvent(Event event) {
 *          TreeItem item = (TreeItem)event.item;
 *          TreeItem parentItem = item.getParentItem();
 *          String text = null;
 *          if (parentItem == null) {
 *              text = "node " + tree.indexOf(item);
 *          } else {
 *              text = parentItem.getText() + " - " + parentItem.indexOf(item);
 *          }
 *          item.setText(text);
 *          System.out.println(text);
 *          item.setItemCount(10);
 *      }
 *  });
 * 
    
 * 
    
 * Note that although this class is a subclass of Composite,
 * it does not normally make sense to add Control children to
 * it, or set a layout on it, unless implementing something like a cell
 * editor.
 * 
    
 * 
    
 * 
    Styles:
    
 * 
    SINGLE, MULTI, CHECK, FULL_SELECTION, VIRTUAL, NO_SCROLL
    
 * 
    Events:
    
 * 
    Selection, DefaultSelection, Collapse, Expand, SetData, MeasureItem, EraseItem, PaintItem
    
 * 
    
 * 
    
 * Note: Only one of the styles SINGLE and MULTI may be specified.
 * 
    
 * IMPORTANT: This class is not intended to be subclassed.
 * 
    
 *
 * @see Tree, TreeItem, TreeColumn snippets
 * @see SWT Example: ControlExample
 * @see Sample code and further information
 * @noextend This class is not intended to be subclassed by clients.
 */
public class Tree extends Composite {
	NSTableColumn firstColumn, checkColumn;
	NSTextFieldCell dataCell;
	NSButtonCell buttonCell;
	NSTableHeaderView headerView;
	TreeItem [] items;
	int itemCount;
	TreeColumn [] columns;
	TreeColumn sortColumn;
	int columnCount;
	int sortDirection;
	int selectedRowIndex = -1;
	boolean ignoreExpand, ignoreSelect, ignoreRedraw, reloadPending, drawExpansion, didSelect, preventSelect, dragDetected;
	Rectangle imageBounds;
	TreeItem insertItem;
	boolean insertBefore;

	/* Used to control drop feedback when DND.FEEDBACK_EXPAND and DND.FEEDBACK_SCROLL is set/not set */
	boolean shouldExpand = true, shouldScroll = true;

	static int NEXT_ID;

	static final int FIRST_COLUMN_MINIMUM_WIDTH = 5;
	static final int IMAGE_GAP = 3;
	static final int TEXT_GAP = 2;
	static final int CELL_GAP = 1;

/**
 * Constructs a new instance of this class given its parent
 * and a style value describing its behavior and appearance.
 * 
    
 * The style value is either one of the style constants defined in
 * class SWT which is applicable to instances of this
 * class, or must be built by bitwise OR'ing together
 * (that is, using the int "|" operator) two or more
 * of those SWT style constants. The class description
 * lists the style constants that are applicable to the class.
 * Style bits are also inherited from superclasses.
 * 
    
 *
 * @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 
      
 *    
    • ERROR_NULL_ARGUMENT - if the parent is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
      • 
 *    
    • ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
      • 
 * 
    
 *
 * @see SWT#SINGLE
 * @see SWT#MULTI
 * @see SWT#CHECK
 * @see SWT#FULL_SELECTION
 * @see SWT#VIRTUAL
 * @see SWT#NO_SCROLL
 * @see Widget#checkSubclass
 * @see Widget#getStyle
 */
public Tree (Composite parent, int style) {
	super (parent, checkStyle (style));
}

@Override
void _addListener (int eventType, Listener listener) {
	super._addListener (eventType, listener);
	clearCachedWidth (items);
}

TreeItem _getItem (TreeItem parentItem, int index, boolean create) {
	int count;
	TreeItem[] items;
	if (parentItem != null) {
		count = parentItem.itemCount;
		items = parentItem.items;
	} else {
		count = this.itemCount;
		items = this.items;
	}
	if (index < 0 || index >= count) return null;
	TreeItem item = items [index];
	if (item != null || (style & SWT.VIRTUAL) == 0 || !create) return item;
	item = new TreeItem (this, parentItem, SWT.NONE, index, false);
	items [index] = item;
	return item;
}

@Override
boolean acceptsFirstResponder (long /*int*/ id, long /*int*/ sel) {
	return true;
}

@Override
long /*int*/ accessibilityAttributeValue(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0) {
	long /*int*/ returnValue = 0;
	NSString attributeName = new NSString(arg0);

	// If the check column is visible, don't report it back as a column for accessibility purposes.
	// The check column is meant to appear as a part of the first column.
	if (attributeName.isEqualToString (OS.NSAccessibilityColumnsAttribute) || attributeName.isEqualToString(OS.NSAccessibilityVisibleColumnsAttribute)) {
		if ((style & SWT.CHECK) != 0) {
			long /*int*/ superValue = super.accessibilityAttributeValue(id, sel, arg0);
			if (superValue != 0) {
				NSArray columns = new NSArray(superValue);
				NSMutableArray columnsWithoutCheck = NSMutableArray.arrayWithCapacity(columns.count() - 1);
				columnsWithoutCheck.addObjectsFromArray(columns);
				columnsWithoutCheck.removeObjectAtIndex(0);
				returnValue = columnsWithoutCheck.id;
			}
		}
	}

	if (returnValue != 0) {
		return returnValue;
	} else {
		return super.accessibilityAttributeValue(id, sel, arg0);
	}
}

/**
 * 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 SelectionListener
 * interface.
 * 
    
 * When widgetSelected is called, the item field of the event object is valid.
 * If the receiver has the SWT.CHECK style and the check selection changes,
 * the event object detail field contains the value SWT.CHECK.
 * widgetDefaultSelected 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.
 * 
    
 *
 * @param listener the listener which should be notified when the user changes the receiver's selection
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the listener is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see SelectionListener
 * @see #removeSelectionListener
 * @see SelectionEvent
 */
public void addSelectionListener(SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	TypedListener typedListener = new TypedListener (listener);
	addListener (SWT.Selection, typedListener);
	addListener (SWT.DefaultSelection, typedListener);
}

/**
 * Adds the listener to the collection of listeners who will
 * be notified when an item in the receiver is expanded or collapsed
 * by sending it one of the messages defined in the TreeListener
 * interface.
 *
 * @param listener the listener which should be notified
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the listener is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see TreeListener
 * @see #removeTreeListener
 */
public void addTreeListener(TreeListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	TypedListener typedListener = new TypedListener (listener);
	addListener (SWT.Expand, typedListener);
	addListener (SWT.Collapse, typedListener);
}

int calculateWidth (TreeItem[] items, int index, GC gc, boolean recurse) {
	if (items == null) return 0;
	int width = 0;
	for (int i=0; iSWT.VIRTUAL     style,
 * these attributes are requested again as needed.
 *
 * @param index the index of the item to clear
 * @param all true if all child items of the indexed item should be
 * cleared recursively, and false otherwise
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see SWT#VIRTUAL
 * @see SWT#SetData
 *
 * @since 3.2
 */
public void clear (int index, boolean all) {
	checkWidget ();
	int count = getItemCount ();
	if (index < 0 || index >= count) error (SWT.ERROR_INVALID_RANGE);
	clear (null, 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 SWT.VIRTUAL style, these
 * attributes are requested again as needed.
 *
 * @param all true if all child items should be cleared
 * recursively, and false otherwise
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see SWT#VIRTUAL
 * @see SWT#SetData
 *
 * @since 3.2
 */
public void clearAll (boolean all) {
	checkWidget ();
	clearAll (null, all);
}

void clearCachedWidth (TreeItem[] items) {
	if (items == null) return;
	for (int i = 0; i < items.length; i++) {
		TreeItem item = items [i];
		if (item == null) break;
		item.width = -1;
		clearCachedWidth (item.items);
	}
}

@Override
void collapseItem_collapseChildren (long /*int*/ id, long /*int*/ sel, long /*int*/ itemID, boolean children) {
	TreeItem item = (TreeItem)display.getWidget(itemID);
	if (item == null) return;
	if (!ignoreExpand) item.sendExpand (false, children);
	ignoreExpand = true;
	super.collapseItem_collapseChildren (id, sel, itemID, children);
	ignoreExpand = false;
	if (isDisposed() || item.isDisposed()) return;
	setScrollWidth ();
}

@Override
long /*int*/ columnAtPoint(long /*int*/ id, long /*int*/ sel, NSPoint point) {
	if ((style & SWT.CHECK) != 0) {
		if (point.x <= getCheckColumnWidth() && point.y < headerView.frame().height) return 1;
	}

	return super.columnAtPoint(id, sel, point);
}

@Override
public Point computeSize (int wHint, int hHint, boolean changed) {
	checkWidget ();
	int width = 0, height = 0;
	if (wHint == SWT.DEFAULT) {
		if (columnCount != 0) {
			for (int i=0; i 1) {
				createColumn (item, index);
			}
		}
	}
}

void createItem (TreeItem item, TreeItem parentItem, int index) {
	int count;
	TreeItem [] items;
	if (parentItem != null) {
		count = parentItem.itemCount;
		items = parentItem.items;
	} else {
		count = this.itemCount;
		items = this.items;
	}
	if (index == -1) index = count;
	if (!(0 <= index && index <= count)) error (SWT.ERROR_INVALID_RANGE);
	if (count == items.length) {
		TreeItem [] newItems = new TreeItem [items.length + 4];
		System.arraycopy (items, 0, newItems, 0, items.length);
		items = newItems;
		if (parentItem != null) {
			parentItem.items = items;
		} else {
			this.items = items;
		}
	}
	System.arraycopy (items, index, items, index + 1, count++ - index);
	items [index] = item;
	item.items = new TreeItem [4];
	SWTTreeItem handle = (SWTTreeItem) new SWTTreeItem ().alloc ().init ();
	item.handle = handle;
	item.createJNIRef ();
	item.register ();
	if (parentItem != null) {
		parentItem.itemCount = count;
	} else {
		this.itemCount = count;
	}
	ignoreExpand = true;
	NSOutlineView widget = (NSOutlineView)view;
	if (getDrawing()) {
		TreeItem[] selectedItems = getSelection ();
		if (parentItem != null) {
			widget.reloadItem (parentItem.handle, true);
		} else {
			widget.reloadData ();
		}
		selectItems (selectedItems, true);
	} else {
		reloadPending = true;
	}
	if (parentItem != null && parentItem.itemCount == 1 && parentItem.expanded) {
		widget.expandItem (parentItem.handle);
	}
	ignoreExpand = false;
}

@Override
void createWidget () {
	super.createWidget ();
	items = new TreeItem [4];
	columns = new TreeColumn [4];
}

@Override
Color defaultBackground () {
	return display.getWidgetColor (SWT.COLOR_LIST_BACKGROUND);
}

@Override
NSFont defaultNSFont () {
	return display.outlineViewFont;
}

@Override
Color defaultForeground () {
	return display.getWidgetColor (SWT.COLOR_LIST_FOREGROUND);
}

@Override
void deselectAll(long /*int*/ id, long /*int*/ sel, long /*int*/ sender) {
	if (preventSelect && !ignoreSelect) return;
	if ((style & SWT.SINGLE) != 0 && !ignoreSelect) {
		if ( ((NSTableView)view).selectedRow() != -1) return;
	}
	super.deselectAll (id, sel, sender);
}

@Override
void deselectRow (long /*int*/ id, long /*int*/ sel, long /*int*/ index) {
	if (preventSelect && !ignoreSelect) return;
	if ((style & SWT.SINGLE) != 0 && !ignoreSelect) {
		if ( ((NSTableView)view).selectedRow() == index) return;
	}
	super.deselectRow (id, sel, index);
}

/**
 * Deselects all selected items in the receiver.
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public void deselectAll () {
	checkWidget ();
	NSTableView widget = (NSOutlineView) view;
	ignoreSelect = true;
	widget.deselectAll (null);
	ignoreSelect = false;
}

@Override
void deregister () {
	super.deregister ();
	display.removeWidget (headerView);
	display.removeWidget (dataCell);
	if (buttonCell != null) display.removeWidget (buttonCell);
}

/**
 * Deselects an item in the receiver.  If the item was already
 * deselected, it remains deselected.
 *
 * @param item the item to be deselected
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.4
 */
public void deselect (TreeItem item) {
	checkWidget ();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	NSOutlineView widget = (NSOutlineView)view;
	long /*int*/ row = widget.rowForItem(item.handle);
	ignoreSelect = true;
	widget.deselectRow (row);
	ignoreSelect = false;
}

void destroyItem (TreeColumn column) {
	int index = 0;
	while (index < columnCount) {
		if (columns [index] == column) break;
		index++;
	}
	for (int i=0; i size.width) newRect.width -= TEXT_GAP;
						break;
					}
				}
				newRect.height = rect.height;
				if (newRect.height > size.height) {
					newRect.y += (newRect.height - size.height) / 2;
					newRect.height = size.height;
				}
				newStr.drawInRect(newRect);
				newStr.release();
			} else {
				NSColor nsColor = NSColor.colorWithDeviceRed(color[0], color[1], color[2], color[3]);
				cell.setTextColor(nsColor);
				callSuper = true;
			}
		} else {
			callSuper = true;
		}
		if (callSuper) {
			NSAttributedString attrStr = cell.attributedStringValue();
			NSSize size = attrStr.size();
			if (rect.height > size.height) {
				rect.y += (rect.height - size.height) / 2;
				rect.height = size.height;
			}
			super.drawInteriorWithFrame_inView(id, sel, rect, view);
		}
	}

	if (hooksPaint) {
		context.saveGraphicsState();
		NSAffineTransform transform = NSAffineTransform.transform();
		transform.translateXBy(offsetX, offsetY);
		transform.concat();

		GCData data = new GCData ();
		data.paintRect = cellRect;
		GC gc = GC.cocoa_new (this, data);
		gc.setFont (item.getFont (columnIndex));
		if (drawSelection) {
			gc.setForeground (selectionForeground);
			gc.setBackground (selectionBackground);
		} else {
			gc.setForeground (userForeground != null ? userForeground : item.getForeground (columnIndex));
			gc.setBackground (item.getBackground (columnIndex));
		}
		if (!drawExpansion) {
			gc.setClipping ((int)(cellRect.x - offsetX), (int)(cellRect.y - offsetY), (int)cellRect.width, (int)cellRect.height);
		}
		Event event = new Event ();
		event.item = item;
		event.gc = gc;
		event.index = columnIndex;
		if (drawForeground) event.detail |= SWT.FOREGROUND;
		if (drawBackground) event.detail |= SWT.BACKGROUND;
		if (isSelected) event.detail |= SWT.SELECTED;
		event.x = itemX;
		event.y = itemY;
		event.width = contentWidth;
		event.height = itemHeight;
		sendEvent (SWT.PaintItem, event);
		gc.dispose ();

		context.restoreGraphicsState();
	}
}

@Override
void drawWithExpansionFrame_inView (long /*int*/ id, long /*int*/ sel, NSRect cellFrame, long /*int*/ view) {
	drawExpansion = true;
	super.drawWithExpansionFrame_inView(id, sel, cellFrame, view);
	drawExpansion = false;
}

@Override
void expandItem_expandChildren (long /*int*/ id, long /*int*/ sel, long /*int*/ itemID, boolean children) {
	TreeItem item = (TreeItem)display.getWidget(itemID);
	if (item == null) return;
	if (!ignoreExpand) item.sendExpand (true, children);
	ignoreExpand = true;
	super.expandItem_expandChildren (id, sel, itemID, children);
	ignoreExpand = false;
	if (isDisposed() || item.isDisposed()) return;
	if (!children) {
		ignoreExpand = true;
		TreeItem[] items = item.items;
		for (int i = 0; i < item.itemCount; i++) {
			if (items[i] != null) items[i].updateExpanded ();
		}
		ignoreExpand = false;
	}
	setScrollWidth (false, item.items, true);
}

@Override
NSRect expansionFrameWithFrame_inView(long /*int*/ id, long /*int*/ sel, NSRect cellRect, long /*int*/ view) {
	if (toolTipText == null) {
		NSRect rect = super.expansionFrameWithFrame_inView(id, sel, cellRect, view);
		NSCell cell = new NSCell(id);
		NSAttributedString str = cell.attributedStringValue();
		NSSize textSize = str.size();
		NSRect expansionRect;
		if (rect.width != 0 && rect.height != 0) {
			if (hooks(SWT.MeasureItem)) {
				expansionRect = cellRect;
				NSSize cellSize = cell.cellSize();
				expansionRect.width = cellSize.width;
			} else {
				expansionRect = rect;
			}
			if (textSize.height > expansionRect.height) {
				expansionRect.height = textSize.height;
			}
		} else {
			if (hooks(SWT.MeasureItem)) {
				expansionRect = cellRect;
				NSSize cellSize = cell.cellSize();
				expansionRect.width = cellSize.width;
			} else {
				expansionRect = cell.titleRectForBounds(cellRect);
				NSSize cellSize = super.cellSize(id, OS.sel_cellSize);
				expansionRect.width = cellSize.width;
			}
			if (textSize.height > expansionRect.height) {
				expansionRect.height = textSize.height;
			} else {
				NSRect contentRect = scrollView.contentView().bounds();
				OS.NSIntersectionRect(contentRect, expansionRect, contentRect);
				if (OS.NSEqualRects(expansionRect, contentRect)) {
					return new NSRect();
				}
			}
		}
		return expansionRect;
	}
	return new NSRect();
}

@Override
Widget findTooltip (NSPoint pt) {
	NSTableView widget = (NSTableView)view;
	NSTableHeaderView headerView = widget.headerView();
	if (headerView != null) {
		pt = headerView.convertPoint_fromView_ (pt, null);
		long /*int*/ index = headerView.columnAtPoint (pt);
		if (index != -1) {
			NSArray nsColumns = widget.tableColumns ();
			id nsColumn = nsColumns.objectAtIndex (index);
			for (int i = 0; i < columnCount; i++) {
				TreeColumn column = columns [i];
				if (column.nsColumn.id == nsColumn.id) {
					return column;
				}
			}
		}
	}
	return super.findTooltip (pt);
}

int getCheckColumnWidth () {
	return (int)checkColumn.dataCell().cellSize().width;
}

@Override
public Rectangle getClientArea () {
	checkWidget ();
	Rectangle rect = super.getClientArea ();
	/*
	 * OSX version < 10.11 - The origin of the tree is the top-left of the rows
	 * of the table, not the header. We adjust the y value and height of the rect 
	 * accordingly, to include the header.
	 * 
	 * OSX 10.11 & above - The origin of the tree is the header and the header's 
	 * height is already included in the rect. Hence, we return the rect as is.
	 */
	if (OS.VERSION_MMB < OS.VERSION_MMB (10, 11, 0)) {
		NSTableHeaderView headerView = ((NSTableView) view).headerView ();
		if (headerView != null) {
			int height =  (int) headerView.bounds ().height;
			rect.y -= height;
			rect.height += height;
		}
	}
	return rect;
}

TreeColumn getColumn (id id) {
	for (int i = 0; i < columnCount; i++) {
		if (columns[i].nsColumn.id == id.id) {
			return columns[i];
		}
	}
	return null;
}

/**
 * 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 TreeColumns were created by the programmer,
 * this method will throw ERROR_INVALID_RANGE despite
 * the fact that a single column of data may be visible in the tree.
 * This occurs when the programmer uses the tree 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 
      
 *    
    • ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#getColumnOrder()
 * @see Tree#setColumnOrder(int[])
 * @see TreeColumn#getMoveable()
 * @see TreeColumn#setMoveable(boolean)
 * @see SWT#Move
 *
 * @since 3.1
 */
public TreeColumn getColumn (int index) {
	checkWidget ();
	if (!(0 <=index && index < columnCount)) error (SWT.ERROR_INVALID_RANGE);
	return columns [index];
}

/**
 * Returns the number of columns contained in the receiver.
 * If no TreeColumns 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 tree like a list, adding items but never creating a column.
 *
 * @return the number of columns
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
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.
 * 
    
 * 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.
 * 
    
 * 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.
 * 
    
 *
 * @return the current visual order of the receiver's items
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#setColumnOrder(int[])
 * @see TreeColumn#getMoveable()
 * @see TreeColumn#setMoveable(boolean)
 * @see SWT#Move
 *
 * @since 3.2
 */
public int [] getColumnOrder () {
	checkWidget ();
	int [] order = new int [columnCount];
	for (int i = 0; i < columnCount; i++) {
		TreeColumn column = columns [i];
		int index = indexOf (column.nsColumn);
		if ((style & SWT.CHECK) != 0) index -= 1;
		order [index] = i;
	}
	return order;
}

/**
 * Returns an array of TreeColumns which are the
 * columns in the receiver. Columns are returned in the order
 * that they were created.  If no TreeColumns 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 tree like a list, adding items but
 * never creating a column.
 * 
    
 * 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.
 * 
    
 *
 * @return the items in the receiver
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#getColumnOrder()
 * @see Tree#setColumnOrder(int[])
 * @see TreeColumn#getMoveable()
 * @see TreeColumn#setMoveable(boolean)
 * @see SWT#Move
 *
 * @since 3.1
 */
public TreeColumn [] getColumns () {
	checkWidget ();
	TreeColumn [] result = new TreeColumn [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 SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
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 SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public int getHeaderHeight () {
	checkWidget ();
	NSTableHeaderView headerView = ((NSOutlineView) view).headerView ();
	if (headerView == null) return 0;
	return (int) headerView.bounds ().height;
}

/**
 * Returns true if the receiver's header is visible,
 * and false otherwise.
 * 
    
 * 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.
 * 
    
 *
 * @return the receiver's header's visibility state
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public boolean getHeaderVisible () {
	checkWidget ();
	return ((NSOutlineView) view).headerView () != 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 
      
 *    
    • ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public TreeItem getItem (int index) {
	checkWidget ();
	int count = getItemCount ();
	if (index < 0 || index >= count) error (SWT.ERROR_INVALID_RANGE);
	return _getItem (null, index, true);
}

/**
 * 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.
 * 
    
 * 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 SWT.FULL_SELECTION style hint, which specifies the selection policy,
 * determines the extent of the selection.
 * 
    
 *
 * @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 
      
 *    
    • ERROR_NULL_ARGUMENT - if the point is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public TreeItem getItem (Point point) {
	checkWidget ();
	if (point == null) error (SWT.ERROR_NULL_ARGUMENT);
	checkItems ();
	NSOutlineView widget = (NSOutlineView)view;
	NSPoint pt = new NSPoint();
	pt.x = point.x;
	pt.y = point.y;
	int row = (int)/*64*/widget.rowAtPoint(pt);
	if (row == -1) return null;
	NSRect rect = widget.frameOfOutlineCellAtRow(row);
	if (OS.NSPointInRect(pt, rect)) return null;
	id id = widget.itemAtRow(row);
	Widget item = display.getWidget (id.id);
	if (item != null && item instanceof TreeItem) {
		return (TreeItem)item;
	}
	return null;
}

/**
 * Returns the number of items contained in the receiver
 * that are direct item children of the receiver.  The
 * number that is returned is the number of roots in the
 * tree.
 *
 * @return the number of items
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public int getItemCount () {
	checkWidget ();
	return itemCount;
}

int getItemCount (TreeItem item) {
	return item == null ? itemCount : item.itemCount;
}

/**
 * Returns the height of the area which would be used to
 * display one of the items in the tree.
 *
 * @return the height of one item
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public int getItemHeight () {
	checkWidget ();
	return (int)((NSOutlineView) view).rowHeight () + CELL_GAP;
}

/**
 * Returns a (possibly empty) array of items contained in the
 * receiver that are direct item children of the receiver.  These
 * are the roots of the tree.
 * 
    
 * 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.
 * 
    
 *
 * @return the items
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public TreeItem [] getItems () {
	checkWidget ();
	TreeItem [] result = new TreeItem [itemCount];
	for (int i=0; itrue if the receiver's lines are visible,
 * and false otherwise. Note that some platforms draw
 * grid lines while others may draw alternating row colors.
 * 
    
 * 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.
 * 
    
 *
 * @return the visibility state of the lines
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public boolean getLinesVisible () {
	checkWidget ();
	return ((NSOutlineView) view).usesAlternatingRowBackgroundColors ();
}

/**
 * Returns the receiver's parent item, which must be a
 * TreeItem or null when the receiver is a
 * root.
 *
 * @return the receiver's parent item
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public TreeItem getParentItem () {
	checkWidget ();
	return null;
}

/**
 * Returns an array of TreeItems that are currently
 * selected in the receiver. The order of the items is unspecified.
 * An empty array indicates that no items are selected.
 * 
    
 * Note: This is not the actual structure used by the receiver
 * to maintain its selection, so modifying the array will
 * not affect the receiver.
 * 
    
 * @return an array representing the selection
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public TreeItem [] getSelection () {
	checkWidget ();
	NSOutlineView widget = (NSOutlineView) view;
	if (widget.numberOfSelectedRows () == 0) {
		return new TreeItem [0];
	}
	NSIndexSet selection = widget.selectedRowIndexes ();
	int count = (int)/*64*/selection.count ();
	long /*int*/ [] indexBuffer = new long /*int*/ [count];
	selection.getIndexes (indexBuffer, count, 0);
	TreeItem [] result = new TreeItem [count];
	for (int i=0; i
 *    
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
    • 
 *    
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
    • 
 * 
 */
public int getSelectionCount () {
	checkWidget ();
	return (int)/*64*/((NSOutlineView) view).numberOfSelectedRows ();
}

/**
 * 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 SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see #setSortColumn(TreeColumn)
 *
 * @since 3.2
 */
public TreeColumn getSortColumn () {
	checkWidget ();
	return sortColumn;
}

/**
 * Returns the direction of the sort indicator for the receiver.
 * The value will be one of UP, DOWN
 * or NONE.
 *
 * @return the sort direction
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see #setSortDirection(int)
 *
 * @since 3.2
 */
public int getSortDirection () {
	checkWidget ();
	return sortDirection;
}

/**
 * Returns the item which is currently at the top of the receiver.
 * This item can change when items are expanded, collapsed, scrolled
 * or new items are added or removed.
 *
 * @return the item at the top of the receiver
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 2.1
 */
public TreeItem getTopItem () {
	checkWidget ();
	//TODO - partial item at the top
	NSRect rect = scrollView.documentVisibleRect ();
	NSPoint point = new NSPoint ();
	point.x = rect.x;
	point.y = rect.y;
	/*
	 * In OSX 10.11, the origin of the tree is the header, not the top-left of the rows.
	 * Offset the point's y coordinate accordingly. 
	 */
	if (OS.VERSION_MMB >= OS.VERSION_MMB (10, 11, 0)) {
		NSTableHeaderView headerView = ((NSTableView) view).headerView ();
		if (headerView != null) {
			int height =  (int) headerView.bounds ().height;
			point.y += height;
		}
	}
	NSOutlineView outlineView = (NSOutlineView)view;
	long /*int*/ index = outlineView.rowAtPoint (point);
	if (index == -1) return null; /* empty */
	id item = outlineView.itemAtRow (index);
	return (TreeItem)display.getWidget (item.id);
}

@Override
NSRect headerRectOfColumn (long /*int*/ id, long /*int*/ sel, long /*int*/ column) {
	if ((style & SWT.CHECK) == 0) return callSuperRect(id, sel, column);

	if (column == 0) {
		NSRect returnValue = callSuperRect(id, sel, column);
		returnValue.width = 0;
		return returnValue;
	}
	if (column == 1) {
		NSRect returnValue = callSuperRect(id, sel, column);
		// Save a call to [NSTableView intercellSpacing] by using our constant.
		returnValue.width += (checkColumn.width() + CELL_GAP);
		returnValue.x -= (checkColumn.width() + CELL_GAP);
		return returnValue;
	}
	return callSuperRect(id, sel, column);
}

@Override
void highlightSelectionInClipRect(long /*int*/ id, long /*int*/ sel, long /*int*/ rect) {
	if (hooks (SWT.EraseItem)) return;
	if ((style & SWT.HIDE_SELECTION) != 0 && !hasFocus()) return;
	NSRect clipRect = new NSRect ();
	OS.memmove (clipRect, rect, NSRect.sizeof);
	callSuper (id, sel, clipRect);
}

@Override
long /*int*/ hitTestForEvent (long /*int*/ id, long /*int*/ sel, long /*int*/ event, NSRect rect, long /*int*/ controlView) {
	/*
	* For some reason, the cell class needs to implement hitTestForEvent:inRect:ofView:,
	* otherwise the double action selector is not called properly.
	*/
	return callSuper(id, sel, event, rect, controlView);
}

@Override
long /*int*/ image (long /*int*/ id, long /*int*/ sel) {
	long /*int*/ [] image = new long /*int*/ [1];
	OS.object_getInstanceVariable(id, Display.SWT_IMAGE, image);
	return image[0];
}

@Override
NSRect imageRectForBounds (long /*int*/ id, long /*int*/ sel, NSRect cellFrame) {
	NSImage image = new NSCell(id).image();
	if (image != null) {
		cellFrame.x += IMAGE_GAP;
		cellFrame.width = imageBounds.width;
		cellFrame.height = imageBounds.height;
	}
	return cellFrame;
}

int indexOf (NSTableColumn column) {
	return (int)/*64*/((NSTableView)view).tableColumns().indexOfObjectIdenticalTo(column);
}

/**
 * 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 
      
 *    
    • ERROR_NULL_ARGUMENT - if the column is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public int indexOf (TreeColumn column) {
	checkWidget ();
	if (column == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (column.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	for (int i=0; i
 *    
  • ERROR_NULL_ARGUMENT - if the item is null
    • 
 *    
  • ERROR_INVALID_ARGUMENT - if the item has been disposed
    • 
 * 
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public int indexOf (TreeItem item) {
	checkWidget ();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	if (item.parentItem != null) return -1;
	for (int i = 0; i < itemCount; i++) {
		if (item == items[i]) return i;
	}
	return -1;
}

@Override
boolean isTransparent() {
	return true;
}

@Override
boolean isTrim (NSView view) {
	if (super.isTrim (view)) return true;
	return view.id == headerView.id;
}

@Override
void keyDown(long /*int*/ id, long /*int*/ sel, long /*int*/ theEvent) {
	ignoreSelect = preventSelect = false;
	super.keyDown(id, sel, theEvent);
}

@Override
long /*int*/ menuForEvent(long /*int*/ id, long /*int*/ sel, long /*int*/ theEvent) {
	if (id != headerView.id) {
		/*
		 * Feature in Cocoa: Table views do not change the selection when the user
		 * right-clicks or control-clicks on an NSTableView or its subclasses. Fix is to select the
		 * clicked-on row ourselves.
		 */
		NSEvent event = new NSEvent(theEvent);
		NSOutlineView tree = (NSOutlineView)view;

		// get the current selections for the outline view.
		NSIndexSet selectedRowIndexes = tree.selectedRowIndexes();

		// select the row that was clicked before showing the menu for the event
		NSPoint mousePoint = view.convertPoint_fromView_(event.locationInWindow(), null);
		long /*int*/ row = tree.rowAtPoint(mousePoint);

		// figure out if the row that was just clicked on is currently selected
		if (selectedRowIndexes.containsIndex(row) == false) {
			NSIndexSet set = (NSIndexSet)new NSIndexSet().alloc();
			set = set.initWithIndex(row);
			tree.selectRowIndexes (set, false);
			set.release();
		}
		// else that row is currently selected, so don't change anything.
	}

	return super.menuForEvent(id, sel, theEvent);
}

@Override
void mouseDown (long /*int*/ id, long /*int*/ sel, long /*int*/ theEvent) {
	if (id == view.id) {
		// Bug/feature in Cocoa:  If the tree has a context menu we just set it visible instead of returning
		// it from menuForEvent:.  This has the side effect, however, of sending control-click to the NSTableView,
		// which is interpreted as a single click that clears the selection.  Fix is to ignore control-click,
		NSEvent event = new NSEvent(theEvent);
		if ((event.modifierFlags() & OS.NSControlKeyMask) != 0) return;
	}
	super.mouseDown(id, sel, theEvent);
}

@Override
void mouseDownSuper(long /*int*/ id, long /*int*/ sel, long /*int*/ theEvent) {
	ignoreSelect = preventSelect = false;
	boolean check = false;
	NSEvent nsEvent = new NSEvent(theEvent);
	NSOutlineView widget = (NSOutlineView)view;
	NSPoint pt = view.convertPoint_fromView_(nsEvent.locationInWindow(), null);
	int row = (int)/*64*/widget.rowAtPoint(pt);
	NSObject itemID = null;
	if (row != -1) itemID = new NSObject(widget.itemAtRow(row));
	if (row != -1 && (style & SWT.CHECK) != 0) {
		int column = (int)/*64*/widget.columnAtPoint(pt);
		NSCell cell = widget.preparedCellAtColumn(column, row);
		if (cell != null && cell.isKindOfClass(OS.class_NSButtonCell) && cell.isEnabled()) {
			NSRect checkRect = cell.imageRectForBounds(widget.frameOfCellAtColumn(column, row));
			if (OS.NSPointInRect(pt, checkRect)) {
				check = preventSelect = true;
		    }
		}
	}
	if (!check && row != -1 && (nsEvent.modifierFlags() & OS.NSDeviceIndependentModifierFlagsMask) == 0 && nsEvent.clickCount() == 1) {
		if (widget.isRowSelected(row)) {
			NSRect rect = widget.frameOfOutlineCellAtRow(row);
			if (!OS.NSPointInRect(pt, rect)) {
				selectedRowIndex = row;
			}
		}
	}
	didSelect = false;
	if (itemID != null) itemID.retain();
	super.mouseDownSuper(id, sel, theEvent);
	if (itemID != null) itemID.release();
	didSelect = false;
}

@Override
boolean needsPanelToBecomeKey (long /*int*/ id, long /*int*/ sel) {
	return false;
}

/*
 * Feature in Cocoa.  If a checkbox is in multi-state mode, nextState cycles
 * from off to mixed to on and back to off again.  This will cause the on state
 * to momentarily appear while clicking on the checkbox.  To avoid this,
 * override [NSCell nextState] to go directly to the desired state.
 */
@Override
long /*int*/ nextState (long /*int*/ id, long /*int*/ sel) {
	NSOutlineView outlineView = (NSOutlineView)view;
	int index = (int)/*64*/outlineView.clickedRow();
	if (index == -1) index = (int)/*64*/outlineView.selectedRow ();
	TreeItem item = (TreeItem)display.getWidget (outlineView.itemAtRow (index).id);
	if (item.grayed) {
		return item.checked ? OS.NSOffState : OS.NSMixedState;
	}
	return item.checked ? OS.NSOffState : OS.NSOnState;
}

@Override
long /*int*/ outlineView_child_ofItem (long /*int*/ id, long /*int*/ sel, long /*int*/ outlineView, long /*int*/ index, long /*int*/ itemID) {
	TreeItem parent = (TreeItem) display.getWidget (itemID);
	TreeItem item = _getItem (parent, (int)/*64*/index, true);
	return item.handle.id;
}

@Override
void outlineView_didClickTableColumn (long /*int*/ id, long /*int*/ sel, long /*int*/ outlineView, long /*int*/ tableColumn) {
	TreeColumn column = getColumn (new id (tableColumn));
	if (column == null) return; /* either CHECK column or firstColumn in 0-column Tree */
	column.sendSelectionEvent (SWT.Selection);
}

@Override
long /*int*/ outlineView_objectValueForTableColumn_byItem (long /*int*/ id, long /*int*/ sel, long /*int*/ outlineView, long /*int*/ tableColumn, long /*int*/ itemID) {
	TreeItem item = (TreeItem) display.getWidget (itemID);
	checkData (item);
	if (checkColumn != null && tableColumn == 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 0) {
		int style = columns [index].style;
		if ((style & SWT.CENTER) != 0) {
			alignment = OS.NSCenterTextAlignment;
		} else if ((style & SWT.RIGHT) != 0) {
			alignment = OS.NSRightTextAlignment;
		}
	}
	Font font = item.cellFont != null ? item.cellFont [index] : null;
	if (font == null) font = item.font;
	if (font == null) font = this.font;
	if (font == null) font = defaultFont ();
	if (font.extraTraits != 0) {
		NSMutableDictionary dict = ((NSMutableDictionary)new NSMutableDictionary().alloc()).initWithCapacity(5);
		dict.setObject (color, OS.NSForegroundColorAttributeName);
		dict.setObject (font.handle, OS.NSFontAttributeName);
		addTraits(dict, font);
		NSMutableParagraphStyle paragraphStyle = (NSMutableParagraphStyle)new NSMutableParagraphStyle ().alloc ().init ();
		paragraphStyle.setLineBreakMode (OS.NSLineBreakByClipping);
		paragraphStyle.setAlignment (alignment);
		paragraphStyle.setBaseWritingDirection(direction);
		dict.setObject (paragraphStyle, OS.NSParagraphStyleAttributeName);
		paragraphStyle.release ();
		NSAttributedString attribStr = ((NSAttributedString) new NSAttributedString ().alloc ()).initWithString (textCell.title(), dict);
		textCell.setAttributedStringValue(attribStr);
		attribStr.release();
		dict.release();
	} else {
		textCell.setFont(font.handle);
		textCell.setTextColor(color);
		textCell.setAlignment (alignment);
		textCell.setBaseWritingDirection(direction);
	}
}

@Override
void outlineViewColumnDidMove (long /*int*/ id, long /*int*/ sel, long /*int*/ aNotification) {
	NSNotification notification = new NSNotification (aNotification);
	NSDictionary userInfo = notification.userInfo ();
	NSString nsstring = (NSString) new NSString().alloc();
	nsstring = nsstring.initWithString("NSOldColumn"); //$NON-NLS-1$
	id nsOldIndex = userInfo.valueForKey (nsstring);
	nsstring.release();
	nsstring = (NSString) new NSString().alloc();
	nsstring = nsstring.initWithString("NSNewColumn"); //$NON-NLS-1$
	id nsNewIndex = userInfo.valueForKey (nsstring);
	nsstring.release();
	int oldIndex = new NSNumber (nsOldIndex).intValue ();
	int newIndex = new NSNumber (nsNewIndex).intValue ();
	NSOutlineView outlineView = (NSOutlineView)view;
	int startIndex = Math.min (oldIndex, newIndex);
	int endIndex = Math.max (oldIndex, newIndex);
	NSArray nsColumns = outlineView.tableColumns ();
	for (int i = startIndex; i <= endIndex; i++) {
		id columnId = nsColumns.objectAtIndex (i);
		TreeColumn column = getColumn (columnId);
		if (column != null) {
			column.sendEvent (SWT.Move);
			if (isDisposed ()) return;
		}
	}
	headerView.setNeedsDisplay(true);
}

@Override
void outlineViewColumnDidResize (long /*int*/ id, long /*int*/ sel, long /*int*/ aNotification) {
	NSNotification notification = new NSNotification (aNotification);
	NSDictionary userInfo = notification.userInfo ();
	NSString nsstring = (NSString) new NSString().alloc();
	nsstring = nsstring.initWithString("NSTableColumn"); //$NON-NLS-1$
	id columnId = userInfo.valueForKey (nsstring);
	nsstring.release();
	TreeColumn column = getColumn (columnId);
	if (column == null) return; /* either CHECK column or firstColumn in 0-column Tree */

	column.sendEvent (SWT.Resize);
	if (isDisposed ()) return;

	NSOutlineView outlineView = (NSOutlineView)view;
	int index = indexOf (column.nsColumn);
	if (index == -1) return; /* column was disposed in Resize callback */

	NSArray nsColumns = outlineView.tableColumns ();
	int columnCount = (int)/*64*/outlineView.numberOfColumns ();
	for (int i = index + 1; i < columnCount; i++) {
		columnId = nsColumns.objectAtIndex (i);
		column = getColumn (columnId);
		if (column != null) {
			column.sendEvent (SWT.Move);
			if (isDisposed ()) return;
		}
	}
}

@Override
void scrollClipViewToPoint (long /*int*/ id, long /*int*/ sel, long /*int*/ clipView, NSPoint point) {
	if (shouldScroll) {
		super.scrollClipViewToPoint(id, sel, clipView, point);
		if ((style & SWT.CHECK) != 0 && columnCount > 0 && ((NSOutlineView) view).headerView () != null) {
			if (point.x <= getCheckColumnWidth()) {
				/*
				 * Header of first column is extended as header of the checkbox column.
				 * So, redraw header of first column when check column is scrolled to be visible.
				 */
				headerView.setNeedsDisplayInRect(headerView.headerRectOfColumn(1));
			}
		}
	}
}

@Override
void sendSelection () {
	if (ignoreSelect) return;
	NSOutlineView widget = (NSOutlineView) view;
	int row = (int)/*64*/widget.selectedRow ();
	if (row == -1)
		sendSelectionEvent (SWT.Selection);
	else {
		id _id = widget.itemAtRow (row);
		TreeItem item = (TreeItem) display.getWidget (_id.id);
		Event event = new Event ();
		event.item = item;
		event.index = row;
		sendSelectionEvent (SWT.Selection, event, false);
	}
}

@Override
void outlineViewSelectionDidChange (long /*int*/ id, long /*int*/ sel, long /*int*/ notification) {
	if (didSelect) return;
	sendSelection ();
}

@Override
void outlineViewSelectionIsChanging (long /*int*/ id, long /*int*/ sel, long /*int*/ notification) {
	didSelect = true;
	sendSelection ();
}

@Override
void outlineView_setObjectValue_forTableColumn_byItem (long /*int*/ id, long /*int*/ sel, long /*int*/ outlineView, long /*int*/ object, long /*int*/ tableColumn, long /*int*/ itemID) {
	if (checkColumn != null && tableColumn == checkColumn.id)  {
		TreeItem item = (TreeItem) display.getWidget (itemID);
		item.checked = !item.checked;
		Event event = new Event ();
		event.detail = SWT.CHECK;
		event.item = item;
		sendSelectionEvent (SWT.Selection, event, false);
		item.redraw (-1);
	}
}

@Override
boolean outlineView_writeItems_toPasteboard(long /*int*/ id, long /*int*/ sel, long /*int*/ arg0, long /*int*/ arg1, long /*int*/ arg2) {
	return sendMouseEvent(NSApplication.sharedApplication().currentEvent(), SWT.DragDetect, true);
}

@Override
void register () {
	super.register ();
	display.addWidget (headerView, this);
	display.addWidget (dataCell, this);
	if (buttonCell != null) display.addWidget (buttonCell, this);
}

@Override
void releaseChildren (boolean destroy) {
	for (int i=0; i
 *    
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
    • 
 *    
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
    • 
 * 
 */
public void removeAll () {
	checkWidget ();
	for (int i=0; i
 *    
  • ERROR_NULL_ARGUMENT - if the listener is null
    • 
 * 
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see SelectionListener
 * @see #addSelectionListener
 */
public void removeSelectionListener (SelectionListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	eventTable.unhook (SWT.Selection, listener);
	eventTable.unhook (SWT.DefaultSelection, listener);
}

/**
 * Removes the listener from the collection of listeners who will
 * be notified when items in the receiver are expanded or collapsed.
 *
 * @param listener the listener which should no longer be notified
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the listener is null
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see TreeListener
 * @see #addTreeListener
 */
public void removeTreeListener (TreeListener listener) {
	checkWidget ();
	if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (eventTable == null) return;
	eventTable.unhook (SWT.Expand, listener);
	eventTable.unhook (SWT.Collapse, listener);
}

@Override
void reskinChildren (int flags) {
	if (items != null) {
		for (int i=0; i
 *    
  • ERROR_INVALID_ARGUMENT - if the item has been disposed
    • 
 * 
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public void setInsertMark (TreeItem item, boolean before) {
	checkWidget ();
	if (item != null && item.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
	TreeItem oldMark = insertItem;
	insertItem = item;
	insertBefore = before;
	if (oldMark != null && !oldMark.isDisposed()) oldMark.redraw (-1);
	if (item != null) item.redraw (-1);
}

/**
 * Selects all of the items in the receiver.
 * 
    
 * If the receiver is single-select, do nothing.
 * 
    
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 */
public void selectAll () {
	checkWidget ();
	if ((style & SWT.SINGLE) != 0) return;
	checkItems ();
	NSOutlineView widget = (NSOutlineView) view;
	ignoreSelect = true;
	widget.selectAll (null);
	ignoreSelect = false;
}

/**
 * Selects an item in the receiver.  If the item was already
 * selected, it remains selected.
 *
 * @param item the item to be selected
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.4
 */
public void select (TreeItem item) {
	checkWidget ();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	checkItems ();
	showItem (item);
	NSOutlineView outlineView = (NSOutlineView) view;
	long /*int*/ row = outlineView.rowForItem (item.handle);
	NSIndexSet set = (NSIndexSet)new NSIndexSet().alloc();
	set = set.initWithIndex(row);
	ignoreSelect = true;
	outlineView.selectRowIndexes (set, (style & SWT.MULTI) != 0);
	ignoreSelect = false;
	set.release();
}

@Override
void selectRowIndexes_byExtendingSelection (long /*int*/ id, long /*int*/ sel, long /*int*/ indexes, boolean extend) {
	if (preventSelect && !ignoreSelect) return;
	if ((style & SWT.SINGLE) != 0 && !ignoreSelect) {
		NSIndexSet set = new NSIndexSet(indexes);
		if (set.count() == 0) return;
	}
	super.selectRowIndexes_byExtendingSelection (id, sel, indexes, extend);
}

@Override
void sendDoubleSelection() {
	NSOutlineView outlineView = (NSOutlineView)view;
	int rowIndex = (int)/*64*/outlineView.clickedRow ();
	if (rowIndex == -1) rowIndex = (int)/*64*/outlineView.selectedRow ();
	if (rowIndex != -1) {
		if ((style & SWT.CHECK) != 0) {
			NSArray columns = outlineView.tableColumns ();
			int columnIndex = (int)/*64*/outlineView.clickedColumn ();
			if (columnIndex != -1) {
				id column = columns.objectAtIndex (columnIndex);
				if (column.id == checkColumn.id) return;
			}
		}
		TreeItem item = (TreeItem) display.getWidget (outlineView.itemAtRow (rowIndex).id);
		Event event = new Event ();
		event.item = item;
		sendSelectionEvent (SWT.DefaultSelection, event, false);
	}
}

@Override
boolean sendKeyEvent (NSEvent nsEvent, int type) {
	boolean result = super.sendKeyEvent (nsEvent, type);
	if (!result) return result;
	if (type != SWT.KeyDown) return result;
	short keyCode = nsEvent.keyCode ();
	switch (keyCode) {
		case 76: /* KP Enter */
		case 36: { /* Return */
			sendDoubleSelection();
			break;
		}
	}
	return result;
}

void sendMeasureItem (TreeItem item, boolean selected, int columnIndex, NSSize size) {
	NSOutlineView widget = (NSOutlineView)this.view;
	int contentWidth = (int)Math.ceil (size.width);
	NSSize spacing = widget.intercellSpacing();
	int itemHeight = (int)Math.ceil (widget.rowHeight() + spacing.height);
	GCData data = new GCData ();
	data.paintRect = widget.frame ();
	GC gc = GC.cocoa_new (this, data);
	gc.setFont (item.getFont (columnIndex));
	Event event = new Event ();
	event.item = item;
	event.gc = gc;
	event.index = columnIndex;
	event.width = contentWidth;
	event.height = itemHeight;
	if (selected && ((style & SWT.HIDE_SELECTION) == 0 || hasFocus())) event.detail |= SWT.SELECTED;
	sendEvent (SWT.MeasureItem, event);
	gc.dispose ();
	if (!isDisposed () && !item.isDisposed ()) {
		size.width = event.width;
		size.height = event.height;
		if (itemHeight < event.height) {
			widget.setRowHeight (event.height);
		}
		if (contentWidth != event.width) {
			if (columnCount == 0 && columnIndex == 0) {
				item.width = event.width;
				item.width += widget.indentationPerLevel () * (1 + widget.levelForItem (item.handle));
				if (setScrollWidth (item)) {
					widget.setNeedsDisplay(true);
				}
			}
		}
	}
}

@Override
boolean sendMouseEvent(NSEvent nsEvent, int type, boolean send) {
	if (type == SWT.DragDetect) {
		dragDetected = true;
	} else if (type == SWT.MouseUp) {
		/*
		 * This code path handles the case of an unmodified click on an already-selected row.
		 * To keep the order of events correct, deselect the other selected items and send the
		 * selection event before MouseUp is sent. Ignore the next selection event.
		 */
		if (!dragDetected && selectedRowIndex != -1) {
			NSOutlineView widget = (NSOutlineView)view;
			NSIndexSet selectedRows = widget.selectedRowIndexes ();
			int count = (int)/*64*/selectedRows.count();
			long /*int*/ [] indexBuffer = new long /*int*/ [count];
			selectedRows.getIndexes(indexBuffer, count, 0);
			for (int i = 0; i < count; i++) {
				if (indexBuffer[i] == selectedRowIndex) continue;
				ignoreSelect = true;
				widget.deselectRow (indexBuffer[i]);
				ignoreSelect = false;
			}

			Event event = new Event ();
			id itemID = widget.itemAtRow (selectedRowIndex);
			if (itemID != null) {
				Widget item = display.getWidget (itemID.id);
				if (item != null && item instanceof TreeItem) {
					event.item = display.getWidget (itemID.id);
					sendSelectionEvent (SWT.Selection, event, false);
				}
			}
			selectedRowIndex = -1;
			ignoreSelect = true;
		}
		dragDetected = false;
	}

	return super.sendMouseEvent (nsEvent, type, send);
}

void selectItems (TreeItem[] items, boolean ignoreDisposed) {
	NSOutlineView outlineView = (NSOutlineView) view;
	NSMutableIndexSet set = (NSMutableIndexSet) new NSMutableIndexSet ().alloc ().init ();
	int length = items.length;
	for (int i=0; i
 *    
  • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
    • 
 *    
  • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
    • 
 * 
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item order is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item order is not the same length as the number of items
      • 
 * 
    
 *
 * @see Tree#getColumnOrder()
 * @see TreeColumn#getMoveable()
 * @see TreeColumn#setMoveable(boolean)
 * @see SWT#Move
 *
 * @since 3.2
 */
public void setColumnOrder (int [] order) {
	checkWidget ();
	if (order == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (columnCount == 0) {
		if (order.length != 0) error (SWT.ERROR_INVALID_ARGUMENT);
		return;
	}
	if (order.length != columnCount) error (SWT.ERROR_INVALID_ARGUMENT);
	int [] oldOrder = getColumnOrder ();
	boolean reorder = false;
	boolean [] seen = new boolean [columnCount];
	for (int i=0; i= columnCount) error (SWT.ERROR_INVALID_ARGUMENT);
		if (seen [index]) error (SWT.ERROR_INVALID_ARGUMENT);
		seen [index] = true;
		if (order [i] != oldOrder [i]) reorder = true;
	}
	if (reorder) {
		NSOutlineView outlineView = (NSOutlineView)view;
		int [] oldX = new int [oldOrder.length];
		int check = (style & SWT.CHECK) != 0 ? 1 : 0;
		for (int i=0; itrue,
 * and marks it invisible otherwise.
 * 
    
 * 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.
 * 
    
 *
 * @param show the new visibility state
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public void setHeaderVisible (boolean show) {
	checkWidget ();
	((NSOutlineView) view).setHeaderView (show ? headerView : null);
	scrollView.tile();
}

/**
 * Sets the number of root-level items contained in the receiver.
 *
 * @param count the number of items
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.2
 */
public void setItemCount (int count) {
	checkWidget ();
	checkItems ();
	count = Math.max (0, count);
	setItemCount (null, count);
}

void setItemCount (TreeItem parentItem, int count) {
	int itemCount = getItemCount (parentItem);
	if (count == itemCount) return;
	NSOutlineView widget = (NSOutlineView) view;
	int length = Math.max (4, (count + 3) / 4 * 4);
	TreeItem [] children = parentItem == null ? items : parentItem.items;
	boolean expanded = parentItem == null || parentItem.getExpanded();
	if (count < itemCount) {
		/*
		* Note that the item count has to be updated before the call to reloadItem(), but
		* the items have to be released after.
		*/
		if (parentItem == null) {
			this.itemCount = count;
		} else {
			parentItem.itemCount = count;
		}
		TreeItem[] selectedItems = getSelection ();
		widget.reloadItem (parentItem != null ? parentItem.handle : null, expanded);
		for (int index = count; index < itemCount; index ++) {
			TreeItem item = children [index];
			if (item != null && !item.isDisposed()) item.release (false);
		}
		selectItems (selectedItems, true);
		TreeItem [] newItems = new TreeItem [length];
		if (children != null) {
			System.arraycopy (children, 0, newItems, 0, count);
		}
		children = newItems;
		if (parentItem == null) {
			this.items = newItems;
		} else {
			parentItem.items = newItems;
		}
	} else {
		if ((style & SWT.VIRTUAL) == 0) {
			for (int i=itemCount; itrue,
 * and marks it invisible otherwise. Note that some platforms draw
 * grid lines while others may draw alternating row colors.
 * 
    
 * 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.
 * 
    
 *
 * @param show the new visibility state
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public void setLinesVisible (boolean show) {
	checkWidget ();
	((NSOutlineView) view).setUsesAlternatingRowBackgroundColors (show);
	((NSOutlineView) view).setGridStyleMask(show ? OS.NSTableViewSolidVerticalGridLineMask : OS.NSTableViewGridNone);
}

@Override
public void setRedraw (boolean redraw) {
	checkWidget ();
	super.setRedraw (redraw);
	if (redraw && drawCount == 0) {
		checkItems ();
		setScrollWidth ();
	}
}

boolean setScrollWidth () {
	return setScrollWidth (true, items, true);
}

boolean setScrollWidth (boolean set, TreeItem[] items, boolean recurse) {
	if (items == null) return false;
	if (ignoreRedraw || !getDrawing()) return false;
	if (columnCount != 0) return false;
	GC gc = new GC (this);
	int newWidth = calculateWidth (items, 0, gc, recurse);
	gc.dispose ();
	if (!set) {
		int oldWidth = (int)firstColumn.width ();
		if (oldWidth >= newWidth) return false;
	}
	firstColumn.setWidth (newWidth);
	if (horizontalBar != null && horizontalBar.view != null) redrawWidget (horizontalBar.view, false);
	return true;
}

boolean setScrollWidth (TreeItem item) {
	if (ignoreRedraw || !getDrawing()) return false;
	if (columnCount != 0) return false;
	TreeItem parentItem = item.parentItem;
	if (parentItem != null && !parentItem.getExpanded ()) return false;
	GC gc = new GC (this);
	int newWidth = item.calculateWidth (0, gc);
	gc.dispose ();
	int oldWidth = (int)firstColumn.width ();
	if (oldWidth < newWidth) {
		firstColumn.setWidth (newWidth);
		if (horizontalBar != null && horizontalBar.view != null) redrawWidget (horizontalBar.view, false);
		return true;
	}
	return false;
}

@Override
void setShouldExpandItem (long /*int*/ id, long /*int*/ sel, boolean shouldExpand) {
	this.shouldExpand = shouldExpand;
}

@Override
void setShouldScrollClipView (long /*int*/ id, long /*int*/ sel, boolean shouldScroll) {
	this.shouldScroll = shouldScroll;
}

/**
 * Sets the receiver's selection to the given item.
 * The current selection is cleared before the new item is selected,
 * and if necessary the receiver is scrolled to make the new selection visible.
 * 
    
 * If the item is not in the receiver, then it is ignored.
 * 
    
 *
 * @param item the item to select
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.2
 */
public void setSelection (TreeItem item) {
	checkWidget ();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	setSelection (new TreeItem [] {item});
}

/**
 * Sets the receiver's selection to be the given array of items.
 * The current selection is cleared before the new items are selected,
 * and if necessary the receiver is scrolled to make the new selection visible.
 * 
    
 * 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.
 * 
    
 *
 * @param items the array of items
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the array of items is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if one of the items has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#deselectAll()
 */
public void setSelection (TreeItem [] items) {
	checkWidget ();
	if (items == null) error (SWT.ERROR_NULL_ARGUMENT);
	checkItems ();
	deselectAll ();
	int length = items.length;
	if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return;
	selectItems (items, false);
	if (items.length > 0) {
		for (int i = 0; i < items.length; i++) {
			TreeItem item = items[i];
			if (item != null) {
				showItem(item, true);
				break;
			}
		}
	}
}

/**
 * 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 null
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_INVALID_ARGUMENT - if the column is disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.2
 */
public void setSortColumn (TreeColumn column) {
	checkWidget ();
	if (column != null && column.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	if (column == sortColumn) return;
	setSort(column, sortDirection);
}

/**
 * Sets the direction of the sort indicator for the receiver. The value
 * can be one of UP, DOWN or NONE.
 *
 * @param direction the direction of the sort indicator
 *
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.2
 */
public void setSortDirection  (int direction) {
	checkWidget ();
	if (direction != SWT.UP && direction != SWT.DOWN && direction != SWT.NONE) return;
	if (direction == sortDirection) return;
	setSort(sortColumn, direction);
}

void setSort (TreeColumn column, int direction) {
	NSImage image = null;
	NSTableColumn nsColumn = null;
	if (column != null) {
		nsColumn = column.nsColumn;
		if (direction == SWT.DOWN) image = NSImage.imageNamed(NSString.stringWith("NSDescendingSortIndicator"));
		if (direction == SWT.UP) image = NSImage.imageNamed(NSString.stringWith("NSAscendingSortIndicator"));
	}
	NSTableView widget = (NSTableView)view;
	if (sortColumn != null && sortColumn != column) {
		widget.setIndicatorImage(null, sortColumn.nsColumn);
	}
	widget.setHighlightedTableColumn(nsColumn);
	widget.setIndicatorImage(image, nsColumn);
	sortDirection = direction;
	sortColumn = column;
}

/**
 * Sets the item which is currently at the top of the receiver.
 * This item can change when items are expanded, collapsed, scrolled
 * or new items are added or removed.
 *
 * @param item the item to be shown
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#getTopItem()
 *
 * @since 2.1
 */
public void setTopItem (TreeItem item) {
	checkWidget();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	checkItems ();
	showItem (item, false);
	NSOutlineView widget = (NSOutlineView) view;
	long /*int*/ row = widget.rowForItem (item.handle);
	if (row == -1) return;
	NSPoint pt = new NSPoint();
	pt.x = scrollView.contentView().bounds().x;
	pt.y = widget.frameOfCellAtColumn(0, row).y;
	/*
	 * In OSX 10.11, the origin of the tree is the header, not the top-left of the rows.
	 * Offset the point's y coordinate accordingly. 
	 */
	if (OS.VERSION_MMB >= OS.VERSION_MMB(10, 11, 0)) {
		if (widget.headerView() != null) {
			NSRect headerRect = headerView.frame();
			pt.y -= headerRect.y + headerRect.height;
		}
	}
	view.scrollPoint(pt);
}

/**
 * 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 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @since 3.1
 */
public void showColumn (TreeColumn column) {
	checkWidget ();
	if (column == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (column.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT);
	if (column.parent != this) return;
	if (columnCount <= 1) return;
	int index = indexOf (column.nsColumn);
	if (!(0 <= index && index < columnCount + ((style & SWT.CHECK) != 0 ? 1 : 0))) return;
	((NSOutlineView)view).scrollColumnToVisible (index);
}

/**
 * Shows the item.  If the item is already showing in the receiver,
 * this method simply returns.  Otherwise, the items are scrolled
 * and expanded until the item is visible.
 *
 * @param item the item to be shown
 *
 * @exception IllegalArgumentException 
      
 *    
    • ERROR_NULL_ARGUMENT - if the item is null
      • 
 *    
    • ERROR_INVALID_ARGUMENT - if the item has been disposed
      • 
 * 
    
 * @exception SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#showSelection()
 */
public void showItem (TreeItem item) {
	checkWidget ();
	if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (item.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
	checkItems ();
	showItem (item, true);
}

void showItem (TreeItem item, boolean scroll) {
	TreeItem parentItem = item.parentItem;
	if (parentItem != null) {
		showItem (parentItem, false);
		if (!parentItem.getExpanded()) {
			parentItem.setExpanded (true);
			Event event = new Event ();
			event.item = parentItem;
			sendEvent (SWT.Expand, event);
		}
	}
	if (scroll) {
		NSOutlineView outlineView = (NSOutlineView) view;
		outlineView.scrollRowToVisible (outlineView.rowForItem (item.handle));
	}
}

/**
 * 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 SWTException 
      
 *    
    • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
      • 
 *    
    • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • 
 * 
    
 *
 * @see Tree#showItem(TreeItem)
 */
public void showSelection () {
	checkWidget ();
	checkItems ();
	//TODO - optimize
	TreeItem [] selection = getSelection ();
	if (selection.length > 0) {
		checkData(selection [0]);
		showItem (selection [0], true);
	}
}

@Override
void updateCursorRects (boolean enabled) {
	super.updateCursorRects (enabled);
	if (headerView == null) return;
	updateCursorRects (enabled, headerView);
}

}




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